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优化hls生成

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This commit is contained in:
xiongziliang 2019-08-07 18:24:08 +08:00
parent 4480dad36f
commit ef61c56cc2
2 changed files with 32 additions and 22 deletions
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48
src/MediaFile/TsMuxer.cpp
View File

@ -73,28 +73,38 @@ void TsMuxer::inputFrame(const Frame::Ptr &frame) {
switch (frame->getCodecId()){
case CodecH265:
case CodecH264: {
//这里的代码逻辑是让SPS、PPS、IDR这些时间戳相同的帧打包到一起当做一个帧处理，
if (!_frameCached.empty() && _frameCached.back()->dts() != frame->dts()) {
Frame::Ptr back = _frameCached.back();
Buffer::Ptr merged_frame = back;
if(_frameCached.size() != 1){
string merged;
_frameCached.for_each([&](const Frame::Ptr &frame){
if(frame->prefixSize()){
merged.append(frame->data(),frame->size());
} else{
merged.append("\x00\x00\x00\x01",4);
merged.append(frame->data(),frame->size());
Buffer::Ptr merged_frame ;
if(frame->configFrame()){
//配置帧,缓存后直接返回，以便下次输入关键帧时使用
_config_frame_cache.append("\x00\x00\x00\x01",4);
_config_frame_cache.append(frame->data() + frame->prefixSize(),frame->size() - frame->prefixSize());
break;
}
});
merged_frame = std::make_shared<BufferString>(std::move(merged));
if(frame->keyFrame()){
//关键帧
if(!_config_frame_cache.empty()){
//有配置帧,那么配置帧合并关键帧后输入ts打包
_config_frame_cache.append("\x00\x00\x00\x01",4);
_config_frame_cache.append(frame->data() + frame->prefixSize(),frame->size() - frame->prefixSize());
merged_frame = std::make_shared<BufferString>(std::move(_config_frame_cache));
_config_frame_cache.clear();
}else{
//这是非第一个的关键帧(h265有多种关键帧)
merged_frame = frame;
}
track_info.stamp.revise(back->dts(),back->pts(),dts_out,pts_out);
}else{
//这里是普通帧，例如B/P，
merged_frame = frame;
//sps、pps这些配置帧清空掉
_config_frame_cache.clear();
}
//输入到ts文件
track_info.stamp.revise(frame->dts(),frame->pts(),dts_out,pts_out);
_timestamp = dts_out;
mpeg_ts_write(_context, track_info.track_id, back->keyFrame() ? 0x0001 : 0, pts_out * 90LL, dts_out * 90LL, merged_frame->data(), merged_frame->size());
_frameCached.clear();
}
_frameCached.emplace_back(Frame::getCacheAbleFrame(frame));
mpeg_ts_write(_context, track_info.track_id, frame->keyFrame() ? 0x0001 : 0, pts_out * 90LL, dts_out * 90LL, merged_frame->data(), merged_frame->size());
}
break;
default: {

2
src/MediaFile/TsMuxer.h
View File

@ -60,7 +60,7 @@ private:
Stamp stamp;
};
unordered_map<int,track_info> _codec_to_trackid;
List<Frame::Ptr> _frameCached;
string _config_frame_cache;
};
}//namespace mediakit