[FFmpeg-cvslog] mpeg12: Detect MXF essence stuff at the end of frames
Michael Niedermayer
git at videolan.org
Tue Feb 26 19:40:19 CET 2013
ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Tue Feb 26 18:55:44 2013 +0100| [997a36238ff0c700acfb77decaa560dc7b3095ec] | committer: Michael Niedermayer
mpeg12: Detect MXF essence stuff at the end of frames
Fixes some of the issues with segment.mov
See: 0226 15:16 Joseph Artsimov (2.1K) [FFmpeg-devel] Two problems with MPEG2 decoder
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=997a36238ff0c700acfb77decaa560dc7b3095ec
---
libavcodec/mpeg12.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/libavcodec/mpeg12.c b/libavcodec/mpeg12.c
index 2ef3360..5e95ad7 100644
--- a/libavcodec/mpeg12.c
+++ b/libavcodec/mpeg12.c
@@ -1821,6 +1821,15 @@ static int mpeg_decode_slice(MpegEncContext *s, int mb_y,
&& s->intra_dc_precision == 2 && s->q_scale_type == 1 && s->alternate_scan == 0
&& s->progressive_frame == 0 /* vbv_delay == 0xBBB || 0xE10*/;
+ if (left >= 32 && !is_d10) {
+ GetBitContext gb = s->gb;
+ align_get_bits(&gb);
+ if (show_bits(&gb, 24) == 0x060E2B) {
+ av_log(avctx, AV_LOG_DEBUG, "Invalid MXF data found in video stream\n");
+ is_d10 = 1;
+ }
+ }
+
if (left < 0 || (left && show_bits(&s->gb, FFMIN(left, 23)) && !is_d10)
|| ((avctx->err_recognition & (AV_EF_BITSTREAM | AV_EF_AGGRESSIVE)) && left > 8)) {
av_log(avctx, AV_LOG_ERROR, "end mismatch left=%d %0X\n", left, show_bits(&s->gb, FFMIN(left, 23)));
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