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commit a508495cd729b0207aa79172110819f49e6431fa Author: nyanmisaka <[email protected]> AuthorDate: Mon Jun 29 15:32:00 2026 +0800 Commit: Marvin Scholz <[email protected]> CommitDate: Mon Jun 29 18:11:20 2026 +0200 avutil/hwcontext_cuda: fix yuv420p V/U plane overlap in cuda_get_buffer() Odd-height yuv420p result in incorrect calculations of the U-plane address offset. The last row of the V-plane overlapped with and was overwritten by the first row of the U-plane, leading to chroma artifacts. ``` ffmpeg -init_hw_device cuda=cu -filter_hw_device cu -f lavfi -i \ testsrc=s=1920x1081,format=yuv420p -vf hwupload -c:v hevc_nvenc \ -vframes 1 -y <OUTPUT> ``` Signed-off-by: nyanmisaka <[email protected]> (cherry picked from commit 3f6bf150cb018334809bec029325b28cff8a5a9a) Signed-off-by: Marvin Scholz <[email protected]> --- libavutil/hwcontext_cuda.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavutil/hwcontext_cuda.c b/libavutil/hwcontext_cuda.c index c57ea4bb7a..227a0d0b19 100644 --- a/libavutil/hwcontext_cuda.c +++ b/libavutil/hwcontext_cuda.c @@ -209,7 +209,7 @@ static int cuda_get_buffer(AVHWFramesContext *ctx, AVFrame *frame) if (ctx->sw_format == AV_PIX_FMT_YUV420P) { frame->linesize[1] = frame->linesize[2] = frame->linesize[0] / 2; frame->data[2] = frame->data[1]; - frame->data[1] = frame->data[2] + frame->linesize[2] * (ctx->height / 2); + frame->data[1] = frame->data[2] + frame->linesize[2] * AV_CEIL_RSHIFT(ctx->height, 1); } frame->format = AV_PIX_FMT_CUDA; _______________________________________________ ffmpeg-cvslog mailing list -- [email protected] To unsubscribe send an email to [email protected]
