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| author | Paul B Mahol <onemda@gmail.com> | 2021-08-19 09:40:14 +0200 |
|---|---|---|
| committer | Paul B Mahol <onemda@gmail.com> | 2021-08-19 09:45:09 +0200 |
| commit | 79934cc702fe1c90bfb58bb83ab20490b9d86e37 (patch) | |
| tree | ad67157335b4635341dab36f4d8e1462dbb4728c | |
| parent | 6d09de90d1a1544e47c959de58189df30de9cda8 (diff) | |
| download | ffmpeg-79934cc702fe1c90bfb58bb83ab20490b9d86e37.tar.gz | |
avfilter/vf_paletteuse: do not use in dithering transparent palette
| -rw-r--r-- | libavfilter/vf_paletteuse.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/libavfilter/vf_paletteuse.c b/libavfilter/vf_paletteuse.c index 4b2144c6f9..1de6a67738 100644 --- a/libavfilter/vf_paletteuse.c +++ b/libavfilter/vf_paletteuse.c @@ -380,9 +380,13 @@ static av_always_inline int get_dst_color_err(PaletteUseContext *s, if (dstx < 0) return dstx; dstc = s->palette[dstx]; - *er = (int)r - (int)(dstc >> 16 & 0xff); - *eg = (int)g - (int)(dstc >> 8 & 0xff); - *eb = (int)b - (int)(dstc & 0xff); + if (dstx == s->transparency_index) { + *er = *eg = *eb = 0; + } else { + *er = (int)r - (int)(dstc >> 16 & 0xff); + *eg = (int)g - (int)(dstc >> 8 & 0xff); + *eb = (int)b - (int)(dstc & 0xff); + } return dstx; } |