mirror of https://git.ffmpeg.org/ffmpeg.git
swscale/utils: Fix intermediate format for cascaded alpha downscaling
Fixes Ticket4926
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit b83d8be6bf
)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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@ -1528,6 +1528,9 @@ fail: // FIXME replace things by appropriate error codes
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int tmpH = sqrt(srcH * (int64_t)dstH);
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enum AVPixelFormat tmpFormat = AV_PIX_FMT_YUV420P;
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if (isALPHA(srcFormat))
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tmpFormat = AV_PIX_FMT_YUVA420P;
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if (srcW*(int64_t)srcH <= 4LL*dstW*dstH)
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return AVERROR(EINVAL);
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