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Ensure there are enough hwframes for Pacer

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Cameron Gutman
2026-01-10 18:13:49 -06:00
parent 788675ad59
commit b41c4022ea
5 changed files with 25 additions and 3 deletions
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6
app/streaming/video/ffmpeg.cpp
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@@ -542,6 +542,12 @@ bool FFmpegVideoDecoder::completeInitialization(const AVCodec* decoder, enum AVP
m_VideoDecoderCtx->pkt_timebase.num = 1;
m_VideoDecoderCtx->pkt_timebase.den = 90000;
// Allocate enough extra frames for Pacer to avoid stalling the decoder
//
// NB: Subtract 4 because FFmpeg always allocates 4 working surfaces when
// constructing a hwframes context (see ff_decode_get_hw_frames_ctx()).
m_VideoDecoderCtx->extra_hw_frames = std::max<int>(0, PACER_MAX_OUTSTANDING_FRAMES - 4);
// For non-hwaccel decoders, set the pix_fmt to hint to the decoder which
// format should be used. This is necessary for certain decoders like the
// out-of-tree nvv4l2dec decoders for L4T platforms. We do not do this