Struct Encoder

Source

pub struct Encoder(pub Context);

Tuple Fields§

§0: Context

Implementations§

Source §

impl Encoder

Source

pub fn video(self) -> Result<Video, Error>

Examples found in repository ?

examples/transcode-x264.rs (line 61)

43    fn new(
44        ist: &format::stream::Stream,
45        octx: &mut format::context::Output,
46        ost_index: usize,
47        x264_opts: Dictionary,
48        enable_logging: bool,
49    ) -> Result<Self, ffmpeg::Error> {
50        let global_header = octx.format().flags().contains(format::Flags::GLOBAL_HEADER);
51        let decoder = ffmpeg::codec::context::Context::from_parameters(ist.parameters())?
52            .decoder()
53            .video()?;
54
55        let codec = encoder::find(codec::Id::H264);
56        let mut ost = octx.add_stream(codec)?;
57
58        let mut encoder =
59            codec::context::Context::new_with_codec(codec.ok_or(ffmpeg::Error::InvalidData)?)
60                .encoder()
61                .video()?;
62        ost.set_parameters(&encoder);
63        encoder.set_height(decoder.height());
64        encoder.set_width(decoder.width());
65        encoder.set_aspect_ratio(decoder.aspect_ratio());
66        encoder.set_format(decoder.format());
67        encoder.set_frame_rate(decoder.frame_rate());
68        encoder.set_time_base(ist.time_base());
69
70        if global_header {
71            encoder.set_flags(codec::Flags::GLOBAL_HEADER);
72        }
73
74        let opened_encoder = encoder
75            .open_with(x264_opts)
76            .expect("error opening x264 with supplied settings");
77        ost.set_parameters(&opened_encoder);
78        Ok(Self {
79            ost_index,
80            decoder,
81            input_time_base: ist.time_base(),
82            encoder: opened_encoder,
83            logging_enabled: enable_logging,
84            frame_count: 0,
85            last_log_frame_count: 0,
86            starting_time: Instant::now(),
87            last_log_time: Instant::now(),
88        })
89    }

Source

pub fn audio(self) -> Result<Audio, Error>

Examples found in repository ?

examples/transcode-audio.rs (line 89)

65fn transcoder<P: AsRef<Path> + ?Sized>(
66    ictx: &mut format::context::Input,
67    octx: &mut format::context::Output,
68    path: &P,
69    filter_spec: &str,
70) -> Result<Transcoder, ffmpeg::Error> {
71    let input = ictx
72        .streams()
73        .best(media::Type::Audio)
74        .expect("could not find best audio stream");
75    let context = ffmpeg::codec::context::Context::from_parameters(input.parameters())?;
76    let mut decoder = context.decoder().audio()?;
77    let codec = ffmpeg::encoder::find(octx.format().codec(path, media::Type::Audio))
78        .expect("failed to find encoder")
79        .audio()?;
80    let global = octx
81        .format()
82        .flags()
83        .contains(ffmpeg::format::flag::Flags::GLOBAL_HEADER);
84
85    decoder.set_parameters(input.parameters())?;
86
87    let mut output = octx.add_stream(codec)?;
88    let context = ffmpeg::codec::context::Context::from_parameters(output.parameters())?;
89    let mut encoder = context.encoder().audio()?;
90
91    let channel_layout = codec
92        .channel_layouts()
93        .map(|cls| cls.best(decoder.channel_layout().channels()))
94        .unwrap_or(ffmpeg::channel_layout::ChannelLayout::STEREO);
95
96    if global {
97        encoder.set_flags(ffmpeg::codec::flag::Flags::GLOBAL_HEADER);
98    }
99
100    encoder.set_rate(decoder.rate() as i32);
101    encoder.set_channel_layout(channel_layout);
102    #[cfg(not(feature = "ffmpeg_7_0"))]
103    {
104        encoder.set_channels(channel_layout.channels());
105    }
106    encoder.set_format(
107        codec
108            .formats()
109            .expect("unknown supported formats")
110            .next()
111            .unwrap(),
112    );
113    encoder.set_bit_rate(decoder.bit_rate());
114    encoder.set_max_bit_rate(decoder.max_bit_rate());
115
116    encoder.set_time_base((1, decoder.rate() as i32));
117    output.set_time_base((1, decoder.rate() as i32));
118
119    let encoder = encoder.open_as(codec)?;
120    output.set_parameters(&encoder);
121
122    let filter = filter(filter_spec, &decoder, &encoder)?;
123
124    let in_time_base = decoder.time_base();
125    let out_time_base = output.time_base();
126
127    Ok(Transcoder {
128        stream: input.index(),
129        filter,
130        decoder,
131        encoder,
132        in_time_base,
133        out_time_base,
134    })
135}

Source

pub fn subtitle(self) -> Result<Subtitle, Error>

Source

pub fn send_frame(&mut self, frame: &Frame) -> Result<(), Error>

Examples found in repository ?

examples/transcode-x264.rs (line 119)

118    fn send_frame_to_encoder(&mut self, frame: &frame::Video) {
119        self.encoder.send_frame(frame).unwrap();
120    }

More examples

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examples/transcode-audio.rs (line 139)

138    fn send_frame_to_encoder(&mut self, frame: &ffmpeg::Frame) {
139        self.encoder.send_frame(frame).unwrap();
140    }

Source

pub fn send_eof(&mut self) -> Result<(), Error>

Sends a NULL packet to the encoder to signal end of stream and enter draining mode.

Examples found in repository ?

examples/transcode-audio.rs (line 143)

142    fn send_eof_to_encoder(&mut self) {
143        self.encoder.send_eof().unwrap();
144    }

More examples

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examples/transcode-x264.rs (line 123)

122    fn send_eof_to_encoder(&mut self) {
123        self.encoder.send_eof().unwrap();
124    }

Source

pub fn receive_packet<P: Mut>(&mut self, packet: &mut P) -> Result<(), Error>

Examples found in repository ?

examples/transcode-audio.rs (line 148)

146    fn receive_and_process_encoded_packets(&mut self, octx: &mut format::context::Output) {
147        let mut encoded = ffmpeg::Packet::empty();
148        while self.encoder.receive_packet(&mut encoded).is_ok() {
149            encoded.set_stream(0);
150            encoded.rescale_ts(self.in_time_base, self.out_time_base);
151            encoded.write_interleaved(octx).unwrap();
152        }
153    }

More examples

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examples/transcode-x264.rs (line 132)

126    fn receive_and_process_encoded_packets(
127        &mut self,
128        octx: &mut format::context::Output,
129        ost_time_base: Rational,
130    ) {
131        let mut encoded = Packet::empty();
132        while self.encoder.receive_packet(&mut encoded).is_ok() {
133            encoded.set_stream(self.ost_index);
134            encoded.rescale_ts(self.input_time_base, ost_time_base);
135            encoded.write_interleaved(octx).unwrap();
136        }
137    }

Source

pub fn set_bit_rate(&mut self, value: usize)

Examples found in repository ?

examples/transcode-audio.rs (line 113)

65fn transcoder<P: AsRef<Path> + ?Sized>(
66    ictx: &mut format::context::Input,
67    octx: &mut format::context::Output,
68    path: &P,
69    filter_spec: &str,
70) -> Result<Transcoder, ffmpeg::Error> {
71    let input = ictx
72        .streams()
73        .best(media::Type::Audio)
74        .expect("could not find best audio stream");
75    let context = ffmpeg::codec::context::Context::from_parameters(input.parameters())?;
76    let mut decoder = context.decoder().audio()?;
77    let codec = ffmpeg::encoder::find(octx.format().codec(path, media::Type::Audio))
78        .expect("failed to find encoder")
79        .audio()?;
80    let global = octx
81        .format()
82        .flags()
83        .contains(ffmpeg::format::flag::Flags::GLOBAL_HEADER);
84
85    decoder.set_parameters(input.parameters())?;
86
87    let mut output = octx.add_stream(codec)?;
88    let context = ffmpeg::codec::context::Context::from_parameters(output.parameters())?;
89    let mut encoder = context.encoder().audio()?;
90
91    let channel_layout = codec
92        .channel_layouts()
93        .map(|cls| cls.best(decoder.channel_layout().channels()))
94        .unwrap_or(ffmpeg::channel_layout::ChannelLayout::STEREO);
95
96    if global {
97        encoder.set_flags(ffmpeg::codec::flag::Flags::GLOBAL_HEADER);
98    }
99
100    encoder.set_rate(decoder.rate() as i32);
101    encoder.set_channel_layout(channel_layout);
102    #[cfg(not(feature = "ffmpeg_7_0"))]
103    {
104        encoder.set_channels(channel_layout.channels());
105    }
106    encoder.set_format(
107        codec
108            .formats()
109            .expect("unknown supported formats")
110            .next()
111            .unwrap(),
112    );
113    encoder.set_bit_rate(decoder.bit_rate());
114    encoder.set_max_bit_rate(decoder.max_bit_rate());
115
116    encoder.set_time_base((1, decoder.rate() as i32));
117    output.set_time_base((1, decoder.rate() as i32));
118
119    let encoder = encoder.open_as(codec)?;
120    output.set_parameters(&encoder);
121
122    let filter = filter(filter_spec, &decoder, &encoder)?;
123
124    let in_time_base = decoder.time_base();
125    let out_time_base = output.time_base();
126
127    Ok(Transcoder {
128        stream: input.index(),
129        filter,
130        decoder,
131        encoder,
132        in_time_base,
133        out_time_base,
134    })
135}

Source

pub fn set_max_bit_rate(&mut self, value: usize)

Examples found in repository ?

examples/transcode-audio.rs (line 114)

65fn transcoder<P: AsRef<Path> + ?Sized>(
66    ictx: &mut format::context::Input,
67    octx: &mut format::context::Output,
68    path: &P,
69    filter_spec: &str,
70) -> Result<Transcoder, ffmpeg::Error> {
71    let input = ictx
72        .streams()
73        .best(media::Type::Audio)
74        .expect("could not find best audio stream");
75    let context = ffmpeg::codec::context::Context::from_parameters(input.parameters())?;
76    let mut decoder = context.decoder().audio()?;
77    let codec = ffmpeg::encoder::find(octx.format().codec(path, media::Type::Audio))
78        .expect("failed to find encoder")
79        .audio()?;
80    let global = octx
81        .format()
82        .flags()
83        .contains(ffmpeg::format::flag::Flags::GLOBAL_HEADER);
84
85    decoder.set_parameters(input.parameters())?;
86
87    let mut output = octx.add_stream(codec)?;
88    let context = ffmpeg::codec::context::Context::from_parameters(output.parameters())?;
89    let mut encoder = context.encoder().audio()?;
90
91    let channel_layout = codec
92        .channel_layouts()
93        .map(|cls| cls.best(decoder.channel_layout().channels()))
94        .unwrap_or(ffmpeg::channel_layout::ChannelLayout::STEREO);
95
96    if global {
97        encoder.set_flags(ffmpeg::codec::flag::Flags::GLOBAL_HEADER);
98    }
99
100    encoder.set_rate(decoder.rate() as i32);
101    encoder.set_channel_layout(channel_layout);
102    #[cfg(not(feature = "ffmpeg_7_0"))]
103    {
104        encoder.set_channels(channel_layout.channels());
105    }
106    encoder.set_format(
107        codec
108            .formats()
109            .expect("unknown supported formats")
110            .next()
111            .unwrap(),
112    );
113    encoder.set_bit_rate(decoder.bit_rate());
114    encoder.set_max_bit_rate(decoder.max_bit_rate());
115
116    encoder.set_time_base((1, decoder.rate() as i32));
117    output.set_time_base((1, decoder.rate() as i32));
118
119    let encoder = encoder.open_as(codec)?;
120    output.set_parameters(&encoder);
121
122    let filter = filter(filter_spec, &decoder, &encoder)?;
123
124    let in_time_base = decoder.time_base();
125    let out_time_base = output.time_base();
126
127    Ok(Transcoder {
128        stream: input.index(),
129        filter,
130        decoder,
131        encoder,
132        in_time_base,
133        out_time_base,
134    })
135}

Source

pub fn set_tolerance(&mut self, value: usize)

Source

pub fn set_quality(&mut self, value: usize)

Source

pub fn set_compression(&mut self, value: Option<usize>)

Methods from Deref<Target = Context>§

Source

pub unsafe fn as_ptr(&self) -> *const AVCodecContext

Source

pub unsafe fn as_mut_ptr(&mut self) -> *mut AVCodecContext

Source

pub fn codec(&self) -> Option<Codec>

Examples found in repository ?

examples/transcode-audio.rs (line 40)

9fn filter(
10    spec: &str,
11    decoder: &codec::decoder::Audio,
12    encoder: &codec::encoder::Audio,
13) -> Result<filter::Graph, ffmpeg::Error> {
14    let mut filter = filter::Graph::new();
15
16    let args = format!(
17        "time_base={}:sample_rate={}:sample_fmt={}:channel_layout=0x{:x}",
18        decoder.time_base(),
19        decoder.rate(),
20        decoder.format().name(),
21        decoder.channel_layout().bits()
22    );
23
24    filter.add(&filter::find("abuffer").unwrap(), "in", &args)?;
25    filter.add(&filter::find("abuffersink").unwrap(), "out", "")?;
26
27    {
28        let mut out = filter.get("out").unwrap();
29
30        out.set_sample_format(encoder.format());
31        out.set_channel_layout(encoder.channel_layout());
32        out.set_sample_rate(encoder.rate());
33    }
34
35    filter.output("in", 0)?.input("out", 0)?.parse(spec)?;
36    filter.validate()?;
37
38    println!("{}", filter.dump());
39
40    if let Some(codec) = encoder.codec() {
41        if !codec
42            .capabilities()
43            .contains(ffmpeg::codec::capabilities::Capabilities::VARIABLE_FRAME_SIZE)
44        {
45            filter
46                .get("out")
47                .unwrap()
48                .sink()
49                .set_frame_size(encoder.frame_size());
50        }
51    }
52
53    Ok(filter)
54}

Source

pub fn medium(&self) -> Type

Examples found in repository ?

examples/metadata.rs (line 46)

5fn main() -> Result<(), ffmpeg::Error> {
6    ffmpeg::init().unwrap();
7
8    match ffmpeg::format::input(&env::args().nth(1).expect("missing file")) {
9        Ok(context) => {
10            for (k, v) in context.metadata().iter() {
11                println!("{}: {}", k, v);
12            }
13
14            if let Some(stream) = context.streams().best(ffmpeg::media::Type::Video) {
15                println!("Best video stream index: {}", stream.index());
16            }
17
18            if let Some(stream) = context.streams().best(ffmpeg::media::Type::Audio) {
19                println!("Best audio stream index: {}", stream.index());
20            }
21
22            if let Some(stream) = context.streams().best(ffmpeg::media::Type::Subtitle) {
23                println!("Best subtitle stream index: {}", stream.index());
24            }
25
26            println!(
27                "duration (seconds): {:.2}",
28                context.duration() as f64 / f64::from(ffmpeg::ffi::AV_TIME_BASE)
29            );
30
31            for stream in context.streams() {
32                println!("stream index {}:", stream.index());
33                println!("\ttime_base: {}", stream.time_base());
34                println!("\tstart_time: {}", stream.start_time());
35                println!("\tduration (stream timebase): {}", stream.duration());
36                println!(
37                    "\tduration (seconds): {:.2}",
38                    stream.duration() as f64 * f64::from(stream.time_base())
39                );
40                println!("\tframes: {}", stream.frames());
41                println!("\tdisposition: {:?}", stream.disposition());
42                println!("\tdiscard: {:?}", stream.discard());
43                println!("\trate: {}", stream.rate());
44
45                let codec = ffmpeg::codec::context::Context::from_parameters(stream.parameters())?;
46                println!("\tmedium: {:?}", codec.medium());
47                println!("\tid: {:?}", codec.id());
48
49                if codec.medium() == ffmpeg::media::Type::Video {
50                    if let Ok(video) = codec.decoder().video() {
51                        println!("\tbit_rate: {}", video.bit_rate());
52                        println!("\tmax_rate: {}", video.max_bit_rate());
53                        println!("\tdelay: {}", video.delay());
54                        println!("\tvideo.width: {}", video.width());
55                        println!("\tvideo.height: {}", video.height());
56                        println!("\tvideo.format: {:?}", video.format());
57                        println!("\tvideo.has_b_frames: {}", video.has_b_frames());
58                        println!("\tvideo.aspect_ratio: {}", video.aspect_ratio());
59                        println!("\tvideo.color_space: {:?}", video.color_space());
60                        println!("\tvideo.color_range: {:?}", video.color_range());
61                        println!("\tvideo.color_primaries: {:?}", video.color_primaries());
62                        println!(
63                            "\tvideo.color_transfer_characteristic: {:?}",
64                            video.color_transfer_characteristic()
65                        );
66                        println!("\tvideo.chroma_location: {:?}", video.chroma_location());
67                        println!("\tvideo.references: {}", video.references());
68                        println!("\tvideo.intra_dc_precision: {}", video.intra_dc_precision());
69                    }
70                } else if codec.medium() == ffmpeg::media::Type::Audio {
71                    if let Ok(audio) = codec.decoder().audio() {
72                        println!("\tbit_rate: {}", audio.bit_rate());
73                        println!("\tmax_rate: {}", audio.max_bit_rate());
74                        println!("\tdelay: {}", audio.delay());
75                        println!("\taudio.rate: {}", audio.rate());
76                        println!("\taudio.channels: {}", audio.channels());
77                        println!("\taudio.format: {:?}", audio.format());
78                        println!("\taudio.frames: {}", audio.frames());
79                        println!("\taudio.align: {}", audio.align());
80                        println!("\taudio.channel_layout: {:?}", audio.channel_layout());
81                    }
82                }
83            }
84        }
85
86        Err(error) => println!("error: {}", error),
87    }
88    Ok(())
89}

Source

pub fn set_flags(&mut self, value: Flags)

Examples found in repository ?

examples/transcode-x264.rs (line 71)

43    fn new(
44        ist: &format::stream::Stream,
45        octx: &mut format::context::Output,
46        ost_index: usize,
47        x264_opts: Dictionary,
48        enable_logging: bool,
49    ) -> Result<Self, ffmpeg::Error> {
50        let global_header = octx.format().flags().contains(format::Flags::GLOBAL_HEADER);
51        let decoder = ffmpeg::codec::context::Context::from_parameters(ist.parameters())?
52            .decoder()
53            .video()?;
54
55        let codec = encoder::find(codec::Id::H264);
56        let mut ost = octx.add_stream(codec)?;
57
58        let mut encoder =
59            codec::context::Context::new_with_codec(codec.ok_or(ffmpeg::Error::InvalidData)?)
60                .encoder()
61                .video()?;
62        ost.set_parameters(&encoder);
63        encoder.set_height(decoder.height());
64        encoder.set_width(decoder.width());
65        encoder.set_aspect_ratio(decoder.aspect_ratio());
66        encoder.set_format(decoder.format());
67        encoder.set_frame_rate(decoder.frame_rate());
68        encoder.set_time_base(ist.time_base());
69
70        if global_header {
71            encoder.set_flags(codec::Flags::GLOBAL_HEADER);
72        }
73
74        let opened_encoder = encoder
75            .open_with(x264_opts)
76            .expect("error opening x264 with supplied settings");
77        ost.set_parameters(&opened_encoder);
78        Ok(Self {
79            ost_index,
80            decoder,
81            input_time_base: ist.time_base(),
82            encoder: opened_encoder,
83            logging_enabled: enable_logging,
84            frame_count: 0,
85            last_log_frame_count: 0,
86            starting_time: Instant::now(),
87            last_log_time: Instant::now(),
88        })
89    }

More examples

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examples/transcode-audio.rs (line 97)

65fn transcoder<P: AsRef<Path> + ?Sized>(
66    ictx: &mut format::context::Input,
67    octx: &mut format::context::Output,
68    path: &P,
69    filter_spec: &str,
70) -> Result<Transcoder, ffmpeg::Error> {
71    let input = ictx
72        .streams()
73        .best(media::Type::Audio)
74        .expect("could not find best audio stream");
75    let context = ffmpeg::codec::context::Context::from_parameters(input.parameters())?;
76    let mut decoder = context.decoder().audio()?;
77    let codec = ffmpeg::encoder::find(octx.format().codec(path, media::Type::Audio))
78        .expect("failed to find encoder")
79        .audio()?;
80    let global = octx
81        .format()
82        .flags()
83        .contains(ffmpeg::format::flag::Flags::GLOBAL_HEADER);
84
85    decoder.set_parameters(input.parameters())?;
86
87    let mut output = octx.add_stream(codec)?;
88    let context = ffmpeg::codec::context::Context::from_parameters(output.parameters())?;
89    let mut encoder = context.encoder().audio()?;
90
91    let channel_layout = codec
92        .channel_layouts()
93        .map(|cls| cls.best(decoder.channel_layout().channels()))
94        .unwrap_or(ffmpeg::channel_layout::ChannelLayout::STEREO);
95
96    if global {
97        encoder.set_flags(ffmpeg::codec::flag::Flags::GLOBAL_HEADER);
98    }
99
100    encoder.set_rate(decoder.rate() as i32);
101    encoder.set_channel_layout(channel_layout);
102    #[cfg(not(feature = "ffmpeg_7_0"))]
103    {
104        encoder.set_channels(channel_layout.channels());
105    }
106    encoder.set_format(
107        codec
108            .formats()
109            .expect("unknown supported formats")
110            .next()
111            .unwrap(),
112    );
113    encoder.set_bit_rate(decoder.bit_rate());
114    encoder.set_max_bit_rate(decoder.max_bit_rate());
115
116    encoder.set_time_base((1, decoder.rate() as i32));
117    output.set_time_base((1, decoder.rate() as i32));
118
119    let encoder = encoder.open_as(codec)?;
120    output.set_parameters(&encoder);
121
122    let filter = filter(filter_spec, &decoder, &encoder)?;
123
124    let in_time_base = decoder.time_base();
125    let out_time_base = output.time_base();
126
127    Ok(Transcoder {
128        stream: input.index(),
129        filter,
130        decoder,
131        encoder,
132        in_time_base,
133        out_time_base,
134    })
135}

Source

pub fn id(&self) -> Id

Examples found in repository ?

examples/metadata.rs (line 47)

5fn main() -> Result<(), ffmpeg::Error> {
6    ffmpeg::init().unwrap();
7
8    match ffmpeg::format::input(&env::args().nth(1).expect("missing file")) {
9        Ok(context) => {
10            for (k, v) in context.metadata().iter() {
11                println!("{}: {}", k, v);
12            }
13
14            if let Some(stream) = context.streams().best(ffmpeg::media::Type::Video) {
15                println!("Best video stream index: {}", stream.index());
16            }
17
18            if let Some(stream) = context.streams().best(ffmpeg::media::Type::Audio) {
19                println!("Best audio stream index: {}", stream.index());
20            }
21
22            if let Some(stream) = context.streams().best(ffmpeg::media::Type::Subtitle) {
23                println!("Best subtitle stream index: {}", stream.index());
24            }
25
26            println!(
27                "duration (seconds): {:.2}",
28                context.duration() as f64 / f64::from(ffmpeg::ffi::AV_TIME_BASE)
29            );
30
31            for stream in context.streams() {
32                println!("stream index {}:", stream.index());
33                println!("\ttime_base: {}", stream.time_base());
34                println!("\tstart_time: {}", stream.start_time());
35                println!("\tduration (stream timebase): {}", stream.duration());
36                println!(
37                    "\tduration (seconds): {:.2}",
38                    stream.duration() as f64 * f64::from(stream.time_base())
39                );
40                println!("\tframes: {}", stream.frames());
41                println!("\tdisposition: {:?}", stream.disposition());
42                println!("\tdiscard: {:?}", stream.discard());
43                println!("\trate: {}", stream.rate());
44
45                let codec = ffmpeg::codec::context::Context::from_parameters(stream.parameters())?;
46                println!("\tmedium: {:?}", codec.medium());
47                println!("\tid: {:?}", codec.id());
48
49                if codec.medium() == ffmpeg::media::Type::Video {
50                    if let Ok(video) = codec.decoder().video() {
51                        println!("\tbit_rate: {}", video.bit_rate());
52                        println!("\tmax_rate: {}", video.max_bit_rate());
53                        println!("\tdelay: {}", video.delay());
54                        println!("\tvideo.width: {}", video.width());
55                        println!("\tvideo.height: {}", video.height());
56                        println!("\tvideo.format: {:?}", video.format());
57                        println!("\tvideo.has_b_frames: {}", video.has_b_frames());
58                        println!("\tvideo.aspect_ratio: {}", video.aspect_ratio());
59                        println!("\tvideo.color_space: {:?}", video.color_space());
60                        println!("\tvideo.color_range: {:?}", video.color_range());
61                        println!("\tvideo.color_primaries: {:?}", video.color_primaries());
62                        println!(
63                            "\tvideo.color_transfer_characteristic: {:?}",
64                            video.color_transfer_characteristic()
65                        );
66                        println!("\tvideo.chroma_location: {:?}", video.chroma_location());
67                        println!("\tvideo.references: {}", video.references());
68                        println!("\tvideo.intra_dc_precision: {}", video.intra_dc_precision());
69                    }
70                } else if codec.medium() == ffmpeg::media::Type::Audio {
71                    if let Ok(audio) = codec.decoder().audio() {
72                        println!("\tbit_rate: {}", audio.bit_rate());
73                        println!("\tmax_rate: {}", audio.max_bit_rate());
74                        println!("\tdelay: {}", audio.delay());
75                        println!("\taudio.rate: {}", audio.rate());
76                        println!("\taudio.channels: {}", audio.channels());
77                        println!("\taudio.format: {:?}", audio.format());
78                        println!("\taudio.frames: {}", audio.frames());
79                        println!("\taudio.align: {}", audio.align());
80                        println!("\taudio.channel_layout: {:?}", audio.channel_layout());
81                    }
82                }
83            }
84        }
85
86        Err(error) => println!("error: {}", error),
87    }
88    Ok(())
89}

Source

pub fn set_parameters<P: Into<Parameters>>( &mut self, parameters: P, ) -> Result<(), Error>

Examples found in repository ?

examples/transcode-audio.rs (line 85)

65fn transcoder<P: AsRef<Path> + ?Sized>(
66    ictx: &mut format::context::Input,
67    octx: &mut format::context::Output,
68    path: &P,
69    filter_spec: &str,
70) -> Result<Transcoder, ffmpeg::Error> {
71    let input = ictx
72        .streams()
73        .best(media::Type::Audio)
74        .expect("could not find best audio stream");
75    let context = ffmpeg::codec::context::Context::from_parameters(input.parameters())?;
76    let mut decoder = context.decoder().audio()?;
77    let codec = ffmpeg::encoder::find(octx.format().codec(path, media::Type::Audio))
78        .expect("failed to find encoder")
79        .audio()?;
80    let global = octx
81        .format()
82        .flags()
83        .contains(ffmpeg::format::flag::Flags::GLOBAL_HEADER);
84
85    decoder.set_parameters(input.parameters())?;
86
87    let mut output = octx.add_stream(codec)?;
88    let context = ffmpeg::codec::context::Context::from_parameters(output.parameters())?;
89    let mut encoder = context.encoder().audio()?;
90
91    let channel_layout = codec
92        .channel_layouts()
93        .map(|cls| cls.best(decoder.channel_layout().channels()))
94        .unwrap_or(ffmpeg::channel_layout::ChannelLayout::STEREO);
95
96    if global {
97        encoder.set_flags(ffmpeg::codec::flag::Flags::GLOBAL_HEADER);
98    }
99
100    encoder.set_rate(decoder.rate() as i32);
101    encoder.set_channel_layout(channel_layout);
102    #[cfg(not(feature = "ffmpeg_7_0"))]
103    {
104        encoder.set_channels(channel_layout.channels());
105    }
106    encoder.set_format(
107        codec
108            .formats()
109            .expect("unknown supported formats")
110            .next()
111            .unwrap(),
112    );
113    encoder.set_bit_rate(decoder.bit_rate());
114    encoder.set_max_bit_rate(decoder.max_bit_rate());
115
116    encoder.set_time_base((1, decoder.rate() as i32));
117    output.set_time_base((1, decoder.rate() as i32));
118
119    let encoder = encoder.open_as(codec)?;
120    output.set_parameters(&encoder);
121
122    let filter = filter(filter_spec, &decoder, &encoder)?;
123
124    let in_time_base = decoder.time_base();
125    let out_time_base = output.time_base();
126
127    Ok(Transcoder {
128        stream: input.index(),
129        filter,
130        decoder,
131        encoder,
132        in_time_base,
133        out_time_base,
134    })
135}

Source

pub fn time_base(&self) -> Rational

Examples found in repository ?

examples/transcode-audio.rs (line 18)

9fn filter(
10    spec: &str,
11    decoder: &codec::decoder::Audio,
12    encoder: &codec::encoder::Audio,
13) -> Result<filter::Graph, ffmpeg::Error> {
14    let mut filter = filter::Graph::new();
15
16    let args = format!(
17        "time_base={}:sample_rate={}:sample_fmt={}:channel_layout=0x{:x}",
18        decoder.time_base(),
19        decoder.rate(),
20        decoder.format().name(),
21        decoder.channel_layout().bits()
22    );
23
24    filter.add(&filter::find("abuffer").unwrap(), "in", &args)?;
25    filter.add(&filter::find("abuffersink").unwrap(), "out", "")?;
26
27    {
28        let mut out = filter.get("out").unwrap();
29
30        out.set_sample_format(encoder.format());
31        out.set_channel_layout(encoder.channel_layout());
32        out.set_sample_rate(encoder.rate());
33    }
34
35    filter.output("in", 0)?.input("out", 0)?.parse(spec)?;
36    filter.validate()?;
37
38    println!("{}", filter.dump());
39
40    if let Some(codec) = encoder.codec() {
41        if !codec
42            .capabilities()
43            .contains(ffmpeg::codec::capabilities::Capabilities::VARIABLE_FRAME_SIZE)
44        {
45            filter
46                .get("out")
47                .unwrap()
48                .sink()
49                .set_frame_size(encoder.frame_size());
50        }
51    }
52
53    Ok(filter)
54}
55
56struct Transcoder {
57    stream: usize,
58    filter: filter::Graph,
59    decoder: codec::decoder::Audio,
60    encoder: codec::encoder::Audio,
61    in_time_base: ffmpeg::Rational,
62    out_time_base: ffmpeg::Rational,
63}
64
65fn transcoder<P: AsRef<Path> + ?Sized>(
66    ictx: &mut format::context::Input,
67    octx: &mut format::context::Output,
68    path: &P,
69    filter_spec: &str,
70) -> Result<Transcoder, ffmpeg::Error> {
71    let input = ictx
72        .streams()
73        .best(media::Type::Audio)
74        .expect("could not find best audio stream");
75    let context = ffmpeg::codec::context::Context::from_parameters(input.parameters())?;
76    let mut decoder = context.decoder().audio()?;
77    let codec = ffmpeg::encoder::find(octx.format().codec(path, media::Type::Audio))
78        .expect("failed to find encoder")
79        .audio()?;
80    let global = octx
81        .format()
82        .flags()
83        .contains(ffmpeg::format::flag::Flags::GLOBAL_HEADER);
84
85    decoder.set_parameters(input.parameters())?;
86
87    let mut output = octx.add_stream(codec)?;
88    let context = ffmpeg::codec::context::Context::from_parameters(output.parameters())?;
89    let mut encoder = context.encoder().audio()?;
90
91    let channel_layout = codec
92        .channel_layouts()
93        .map(|cls| cls.best(decoder.channel_layout().channels()))
94        .unwrap_or(ffmpeg::channel_layout::ChannelLayout::STEREO);
95
96    if global {
97        encoder.set_flags(ffmpeg::codec::flag::Flags::GLOBAL_HEADER);
98    }
99
100    encoder.set_rate(decoder.rate() as i32);
101    encoder.set_channel_layout(channel_layout);
102    #[cfg(not(feature = "ffmpeg_7_0"))]
103    {
104        encoder.set_channels(channel_layout.channels());
105    }
106    encoder.set_format(
107        codec
108            .formats()
109            .expect("unknown supported formats")
110            .next()
111            .unwrap(),
112    );
113    encoder.set_bit_rate(decoder.bit_rate());
114    encoder.set_max_bit_rate(decoder.max_bit_rate());
115
116    encoder.set_time_base((1, decoder.rate() as i32));
117    output.set_time_base((1, decoder.rate() as i32));
118
119    let encoder = encoder.open_as(codec)?;
120    output.set_parameters(&encoder);
121
122    let filter = filter(filter_spec, &decoder, &encoder)?;
123
124    let in_time_base = decoder.time_base();
125    let out_time_base = output.time_base();
126
127    Ok(Transcoder {
128        stream: input.index(),
129        filter,
130        decoder,
131        encoder,
132        in_time_base,
133        out_time_base,
134    })
135}

Source

pub fn set_time_base<R: Into<Rational>>(&mut self, value: R)

Examples found in repository ?

examples/transcode-x264.rs (line 68)

43    fn new(
44        ist: &format::stream::Stream,
45        octx: &mut format::context::Output,
46        ost_index: usize,
47        x264_opts: Dictionary,
48        enable_logging: bool,
49    ) -> Result<Self, ffmpeg::Error> {
50        let global_header = octx.format().flags().contains(format::Flags::GLOBAL_HEADER);
51        let decoder = ffmpeg::codec::context::Context::from_parameters(ist.parameters())?
52            .decoder()
53            .video()?;
54
55        let codec = encoder::find(codec::Id::H264);
56        let mut ost = octx.add_stream(codec)?;
57
58        let mut encoder =
59            codec::context::Context::new_with_codec(codec.ok_or(ffmpeg::Error::InvalidData)?)
60                .encoder()
61                .video()?;
62        ost.set_parameters(&encoder);
63        encoder.set_height(decoder.height());
64        encoder.set_width(decoder.width());
65        encoder.set_aspect_ratio(decoder.aspect_ratio());
66        encoder.set_format(decoder.format());
67        encoder.set_frame_rate(decoder.frame_rate());
68        encoder.set_time_base(ist.time_base());
69
70        if global_header {
71            encoder.set_flags(codec::Flags::GLOBAL_HEADER);
72        }
73
74        let opened_encoder = encoder
75            .open_with(x264_opts)
76            .expect("error opening x264 with supplied settings");
77        ost.set_parameters(&opened_encoder);
78        Ok(Self {
79            ost_index,
80            decoder,
81            input_time_base: ist.time_base(),
82            encoder: opened_encoder,
83            logging_enabled: enable_logging,
84            frame_count: 0,
85            last_log_frame_count: 0,
86            starting_time: Instant::now(),
87            last_log_time: Instant::now(),
88        })
89    }

More examples

Hide additional examples

examples/transcode-audio.rs (line 116)

65fn transcoder<P: AsRef<Path> + ?Sized>(
66    ictx: &mut format::context::Input,
67    octx: &mut format::context::Output,
68    path: &P,
69    filter_spec: &str,
70) -> Result<Transcoder, ffmpeg::Error> {
71    let input = ictx
72        .streams()
73        .best(media::Type::Audio)
74        .expect("could not find best audio stream");
75    let context = ffmpeg::codec::context::Context::from_parameters(input.parameters())?;
76    let mut decoder = context.decoder().audio()?;
77    let codec = ffmpeg::encoder::find(octx.format().codec(path, media::Type::Audio))
78        .expect("failed to find encoder")
79        .audio()?;
80    let global = octx
81        .format()
82        .flags()
83        .contains(ffmpeg::format::flag::Flags::GLOBAL_HEADER);
84
85    decoder.set_parameters(input.parameters())?;
86
87    let mut output = octx.add_stream(codec)?;
88    let context = ffmpeg::codec::context::Context::from_parameters(output.parameters())?;
89    let mut encoder = context.encoder().audio()?;
90
91    let channel_layout = codec
92        .channel_layouts()
93        .map(|cls| cls.best(decoder.channel_layout().channels()))
94        .unwrap_or(ffmpeg::channel_layout::ChannelLayout::STEREO);
95
96    if global {
97        encoder.set_flags(ffmpeg::codec::flag::Flags::GLOBAL_HEADER);
98    }
99
100    encoder.set_rate(decoder.rate() as i32);
101    encoder.set_channel_layout(channel_layout);
102    #[cfg(not(feature = "ffmpeg_7_0"))]
103    {
104        encoder.set_channels(channel_layout.channels());
105    }
106    encoder.set_format(
107        codec
108            .formats()
109            .expect("unknown supported formats")
110            .next()
111            .unwrap(),
112    );
113    encoder.set_bit_rate(decoder.bit_rate());
114    encoder.set_max_bit_rate(decoder.max_bit_rate());
115
116    encoder.set_time_base((1, decoder.rate() as i32));
117    output.set_time_base((1, decoder.rate() as i32));
118
119    let encoder = encoder.open_as(codec)?;
120    output.set_parameters(&encoder);
121
122    let filter = filter(filter_spec, &decoder, &encoder)?;
123
124    let in_time_base = decoder.time_base();
125    let out_time_base = output.time_base();
126
127    Ok(Transcoder {
128        stream: input.index(),
129        filter,
130        decoder,
131        encoder,
132        in_time_base,
133        out_time_base,
134    })
135}

Source

pub fn frame_rate(&self) -> Rational

Source

pub fn set_frame_rate<R: Into<Rational>>(&mut self, value: Option<R>)

Examples found in repository ?

examples/transcode-x264.rs (line 67)

43    fn new(
44        ist: &format::stream::Stream,
45        octx: &mut format::context::Output,
46        ost_index: usize,
47        x264_opts: Dictionary,
48        enable_logging: bool,
49    ) -> Result<Self, ffmpeg::Error> {
50        let global_header = octx.format().flags().contains(format::Flags::GLOBAL_HEADER);
51        let decoder = ffmpeg::codec::context::Context::from_parameters(ist.parameters())?
52            .decoder()
53            .video()?;
54
55        let codec = encoder::find(codec::Id::H264);
56        let mut ost = octx.add_stream(codec)?;
57
58        let mut encoder =
59            codec::context::Context::new_with_codec(codec.ok_or(ffmpeg::Error::InvalidData)?)
60                .encoder()
61                .video()?;
62        ost.set_parameters(&encoder);
63        encoder.set_height(decoder.height());
64        encoder.set_width(decoder.width());
65        encoder.set_aspect_ratio(decoder.aspect_ratio());
66        encoder.set_format(decoder.format());
67        encoder.set_frame_rate(decoder.frame_rate());
68        encoder.set_time_base(ist.time_base());
69
70        if global_header {
71            encoder.set_flags(codec::Flags::GLOBAL_HEADER);
72        }
73
74        let opened_encoder = encoder
75            .open_with(x264_opts)
76            .expect("error opening x264 with supplied settings");
77        ost.set_parameters(&opened_encoder);
78        Ok(Self {
79            ost_index,
80            decoder,
81            input_time_base: ist.time_base(),
82            encoder: opened_encoder,
83            logging_enabled: enable_logging,
84            frame_count: 0,
85            last_log_frame_count: 0,
86            starting_time: Instant::now(),
87            last_log_time: Instant::now(),
88        })
89    }