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Diffstat (limited to 'libavcodec/utils.c')
-rw-r--r-- | libavcodec/utils.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/libavcodec/utils.c b/libavcodec/utils.c index 925b3ed047..4245b1a813 100644 --- a/libavcodec/utils.c +++ b/libavcodec/utils.c @@ -432,6 +432,11 @@ void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height, // some of the optimized chroma MC reads one line too much // which is also done in mpeg decoders with lowres > 0 *height += 2; + + // H.264 uses edge emulation for out of frame motion vectors, for this + // it requires a temporary area large enough to hold a 21x21 block, + // increasing witdth ensure that the temporary area is large enough, + // the next rounded up width is 32 *width = FFMAX(*width, 32); } |