In these cases, there is no extradata but only the properly set
width/height values by the demuxer.
This makes sure VP6 in F4V files is cropped properly.
This is similar to what is done for H264 for letting the container
width/height override what's in the bitstream, since 30f515091.
---
libavcodec/vp6.c | 18 ++++++++++++++----
1 file changed, 14 insertions(+), 4 deletions(-)
diff --git a/libavcodec/vp6.c b/libavcodec/vp6.c
index b8a9228..8b11daa 100644
--- a/libavcodec/vp6.c
+++ b/libavcodec/vp6.c
@@ -84,10 +84,20 @@ static int vp6_parse_header(VP56Context *s, const uint8_t
*buf, int buf_size,
if (!s->macroblocks || /* first frame */
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;
+ if (s->avctx->extradata_size == 0 &&
+ FFALIGN(s->avctx->width, 16) == 16*cols &&
+ FFALIGN(s->avctx->height, 16) == 16*rows) {
+ // We assume this is properly signalled container cropping,
+ // in an F4V file. Just set the coded_width/height, don't
+ // touch the cropped ones.
+ s->avctx->coded_width = 16*cols;
+ s->avctx->coded_height = 16*rows;
+ } else {
+ 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 = VP56_SIZE_CHANGE;
}
--
1.7.9.4
_______________________________________________
libav-devel mailing list
[email protected]
https://lists.libav.org/mailman/listinfo/libav-devel
