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FFV1-SLICE-JUNK

Name

No junk at the end of the slice.

Description

In case of corruption at the end of the frame, junk in slice prevents decoding of slices after the junk.

Reproducibility

Get FFmpeg source code, configure it, then:

mv libavcodec/ffv1enc_template.c ffv1enc_template.c
sed -e 's/put_symbol_inline(c, p->state\[context], diff, 1, NULL, NULL);/for (int i=0; i<1000; i++) put_symbol_inline(c, p->state\[context], diff, 1, NULL, NULL);/g' ffv1enc_template.c > libavcodec/ffv1enc_template.c
make
mv ffv1enc_template.c libavcodec/ffv1enc_template.c
./ffmpeg -f lavfi -i "color=c=black:size=2x2" -vframes 1 -pix_fmt gray8 -write_crc32 0 -c:v ffv1 -level 3 -slices 1 -coder 1 FFV1-SLICE-JUNK_v3.mkv