From ba6e36f906c9ff8a4debd44288792579495bafc3 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sun, 8 Jan 2012 22:48:58 +0100 Subject: [PATCH] swscale: Force full horizontal chroma internally when the output has a odd size. This fixes a gray line on the right side due to 1 column of pixels being skiped. Fixes Ticket891 Signed-off-by: Michael Niedermayer --- libswscale/utils.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/libswscale/utils.c b/libswscale/utils.c index 1bbe58e58b..13eb07512e 100644 --- a/libswscale/utils.c +++ b/libswscale/utils.c @@ -850,7 +850,14 @@ int sws_init_context(SwsContext *c, SwsFilter *srcFilter, SwsFilter *dstFilter) getSubSampleFactors(&c->chrDstHSubSample, &c->chrDstVSubSample, dstFormat); // reuse chroma for 2 pixels RGB/BGR unless user wants full chroma interpolation - if (isAnyRGB(dstFormat) && !(flags&SWS_FULL_CHR_H_INT)) c->chrDstHSubSample=1; + if (isAnyRGB(dstFormat) && !(flags&SWS_FULL_CHR_H_INT)) { + if (dstW&1) { + av_log(c, AV_LOG_DEBUG, "Forcing full internal H chroma due to odd output size\n"); + flags |= SWS_FULL_CHR_H_INT; + c->flags = flags; + } else + c->chrDstHSubSample = 1; + } // drop some chroma lines if the user wants it c->vChrDrop= (flags&SWS_SRC_V_CHR_DROP_MASK)>>SWS_SRC_V_CHR_DROP_SHIFT;