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examples/transcode-audio: avoid packet reallocation

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This commit is contained in:
meh 2015-09-12 20:39:06 +02:00
parent 71d23d0f92
commit a7fcbd81fa
1 changed files with 13 additions and 16 deletions
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29
examples/transcode-audio.rs
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@ -97,29 +97,26 @@ fn main() {
octx.set_metadata(ictx.metadata().to_owned());
octx.write_header().unwrap();
let time_base = (1, 1000000);
let mut frame = frame::Audio::empty();
let in_time_base = (1, 1000000);
let out_time_base = octx.stream(0).unwrap().time_base();
let (os_index, os_time_base) = {
let os = octx.stream(0).unwrap();
(os.index(), os.time_base())
};
let mut decoded = frame::Audio::empty();
let mut encoded = ffmpeg::Packet::empty();
for (stream, mut packet) in ictx.packets() {
if stream.index() == transcoder.stream {
packet.rescale_ts(stream.time_base(), time_base);
packet.rescale_ts(stream.time_base(), in_time_base);
if transcoder.decoder.decode(&packet, &mut frame).unwrap() {
let timestamp = frame.timestamp();
frame.set_pts(timestamp);
transcoder.filter.get("in").unwrap().source().add(&frame).unwrap();
if transcoder.decoder.decode(&packet, &mut decoded).unwrap() {
let timestamp = decoded.timestamp();
decoded.set_pts(timestamp);
while let Ok(..) = transcoder.filter.get("out").unwrap().sink().frame(&mut frame) {
let mut encoded = ffmpeg::Packet::empty();
transcoder.filter.get("in").unwrap().source().add(&decoded).unwrap();
if let Ok(true) = transcoder.encoder.encode(&frame, &mut encoded) {
encoded.set_stream(os_index);
encoded.rescale_ts(time_base, os_time_base);
while let Ok(..) = transcoder.filter.get("out").unwrap().sink().frame(&mut decoded) {
if let Ok(true) = transcoder.encoder.encode(&decoded, &mut encoded) {
encoded.set_stream(0);
encoded.rescale_ts(in_time_base, out_time_base);
encoded.write_interleaved(&mut octx).unwrap();
}
}