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Optimize encoding parameters for low-latency

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This commit is contained in:
Cameron Gutman
2020-01-17 18:45:14 -08:00
parent 15dd6b3cd0
commit 32b6f8a395
6 changed files with 14 additions and 14 deletions
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16
sunshine/video.cpp
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@@ -98,12 +98,20 @@ void encodeThread(
ctx->time_base = AVRational{1, framerate};
ctx->framerate = AVRational{framerate, 1};
ctx->pix_fmt = AV_PIX_FMT_YUV420P;
ctx->max_b_frames = config::video.max_b_frames;
ctx->has_b_frames = 1;
// B-frames delay decoder output, so never use them
ctx->max_b_frames = 0;
// Use an infinite GOP length since I-frames are generated on demand
ctx->gop_size = std::numeric_limits<int>::max();
ctx->keyint_min = ctx->gop_size;
// Some client decoders have limits on the number of reference frames
ctx->refs = config.numRefFrames;
ctx->slices = config.slicesPerFrame;
ctx->thread_type = FF_THREAD_SLICE;
ctx->thread_count = config::video.threads;
ctx->thread_count = std::min(ctx->slices, config::video.threads);
AVDictionary *options {nullptr};
@@ -119,11 +127,9 @@ void encodeThread(
ctx->rc_min_rate = config.bitrate;
}
else if(config::video.crf != 0) {
ctx->gop_size = config::video.gop_size;
av_dict_set_int(&options, "crf", config::video.crf, 0);
}
else {
ctx->gop_size = config::video.gop_size;
av_dict_set_int(&options, "qp", config::video.qp, 0);
}