use the adjustment value present in FLV to crop VP6 video

Originally committed as revision 6770 to svn://svn.ffmpeg.org/ffmpeg/trunk

1 files changed, 4 insertions, 0 deletions

diff --git a/libavcodec/vp6.c b/libavcodec/vp6.c
index de6b61dc44..6d5d46b0f0 100644
--- a/libavcodec/vp6.c
+++ b/libavcodec/vp6.c
@@ -64,6 +64,10 @@ static int vp6_parse_header(vp56_context_t *s, uint8_t *buf, int buf_size,
         if (16*cols != s->avctx->coded_width ||
             16*rows != s->avctx->coded_height) {
             avcodec_set_dimensions(s->avctx, 16*cols, 16*rows);
+            if (s->avctx->extradata_size == 1) {
+                s->avctx->width  -= s->avctx->extradata[0] >> 4;
+                s->avctx->height -= s->avctx->extradata[0] & 0x0F;
+            }
             res = 2;
         }