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mp4切片逻辑提高对音视频交织性差的流的兼容性能

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xiongziliang 2022-03-20 14:52:15 +08:00
parent 19c7d1c406
commit a16b6cbc59
1 changed files with 15 additions and 12 deletions
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9
src/Record/MP4Recorder.cpp
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@ -96,6 +96,8 @@ void MP4Recorder::closeFile() {
}
bool MP4Recorder::inputFrame(const Frame::Ptr &frame) {
if (!(_have_video && frame->getTrackType() == TrackAudio)) {
//如果有视频且输入的是音频，那么应该忽略切片逻辑
if (_last_dts == 0 || _last_dts > frame->dts()) {
//极少情况下dts时间戳可能回退
_last_dts = frame->dts();
@ -104,12 +106,13 @@ bool MP4Recorder::inputFrame(const Frame::Ptr &frame) {
auto duration = frame->dts() - _last_dts;
if (!_muxer || ((duration > _max_second * 1000) && (!_have_video || (_have_video && frame->keyFrame())))) {
//成立条件
//1、_muxer为空
//2、到了切片时间，并且只有音频
//3、到了切片时间，有视频并且遇到视频的关键帧
// 1、_muxer为空
// 2、到了切片时间，并且只有音频
// 3、到了切片时间，有视频并且遇到视频的关键帧
_last_dts = 0;
createFile();
}
}
if (_muxer) {
//生成mp4文件