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Don't set pix_fmt for hwaccel decoders

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This works around a bug in the AV1 Vulkan decoding code in FFmpeg
that causes it to incorrectly skip hwaccel init.

Fixes #1511
This commit is contained in:
Cameron Gutman
2025-10-19 16:16:06 -05:00
parent 4688f3650c
commit c5ca672865
1 changed files with 11 additions and 1 deletions
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12
app/streaming/video/ffmpeg.cpp
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@@ -519,9 +519,19 @@ bool FFmpegVideoDecoder::completeInitialization(const AVCodec* decoder, enum AVP
// Setup decoding parameters
m_VideoDecoderCtx->width = params->width;
m_VideoDecoderCtx->height = params->height;
m_VideoDecoderCtx->pix_fmt = requiredFormat != AV_PIX_FMT_NONE ? requiredFormat : m_FrontendRenderer->getPreferredPixelFormat(params->videoFormat);
m_VideoDecoderCtx->get_format = ffGetFormat;
// 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
// for hwaccel decoders because it causes the AV1 Vulkan video decoder in
// FFmpeg 7.0-8.0 to incorrectly believe ff_get_format() was called.
// See #1511.
if (m_HwDecodeCfg == nullptr) {
m_VideoDecoderCtx->pix_fmt = (requiredFormat != AV_PIX_FMT_NONE) ?
requiredFormat : m_FrontendRenderer->getPreferredPixelFormat(params->videoFormat);
}
AVDictionary* options = nullptr;
// Allow the backend renderer to attach data to this decoder