[FFmpeg-devel] [PATCH] avcodec/mjpegdec: Try to continue decoding on zero quant matrix value
Michael Niedermayer
michael at niedermayer.cc
Sun Jul 4 22:28:00 EEST 2021
On Sat, Jul 03, 2021 at 12:25:28PM -0400, Andriy Gelman wrote:
> From: Andriy Gelman <andriy.gelman at gmail.com>
>
> A zero value in the quantization matrix is invalid but in practice will
> just set the transform coefficient to zero after inverse quantization.
> Try to continue decoding if the AV_EF_EXPLODE flag is not set.
>
> Fixes ticket #9287.
>
> Signed-off-by: Andriy Gelman <andriy.gelman at gmail.com>
> ---
>
> The last frame in the sample of the ticket does not decode because the
> input file appears truncated.
> Something like the following patch would still be needed to output the final
> frame:
> https://patchwork.ffmpeg.org/project/ffmpeg/patch/20210627135307.14008-1-michael@niedermayer.cc/
>
> libavcodec/mjpegdec.c | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
LGTM
thx
[...]
--
Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
Never trust a computer, one day, it may think you are the virus. -- Compn
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