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swscale: set dither to a specific value for rgb/bgr8 output

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-08-19 18:29:40 +02:00
parent 76d8d23881
commit 8c50ea2251
1 changed files with 2 additions and 0 deletions
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2
libswscale/utils.c
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@ -1203,6 +1203,8 @@ av_cold int sws_init_context(SwsContext *c, SwsFilter *srcFilter,
dstFormat == AV_PIX_FMT_RGB4_BYTE ||
dstFormat == AV_PIX_FMT_BGR8 ||
dstFormat == AV_PIX_FMT_RGB8) {
if (c->dither == SWS_DITHER_AUTO)
c->dither = (flags & SWS_FULL_CHR_H_INT) ? SWS_DITHER_ED : SWS_DITHER_BAYER;
if (c->dither == SWS_DITHER_ED && !(flags & SWS_FULL_CHR_H_INT)) {
av_log(c, AV_LOG_DEBUG,
"Error diffusion dither is only supported in full chroma interpolation for destination format '%s'\n",