[FFmpeg-cvslog] matroskadec: Improve TTA duration calculation

[James Almer]

ffmpeg | branch: release/1.2 | James Almer <jamrial at gmail.com> | Sat Aug 17 14:48:33 2013 -0300| [9865f19f15ba05b87c58027b81c2edc193cb283b] | committer: Michael Niedermayer

matroskadec: Improve TTA duration calculation

Calculate the duration as accurately as possible to improve decoding of samples
where the last frame is smaller than the rest.

Signed-off-by: James Almer <jamrial at gmail.com>
Approved-by: Paul B Mahol <onemda at gmail.com>
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
(cherry picked from commit af248fa1174200acb537a6ab1198bb2fed38e884)

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=9865f19f15ba05b87c58027b81c2edc193cb283b
---

 libavformat/matroskadec.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c
index be30f93..2590a71 100644
--- a/libavformat/matroskadec.c
+++ b/libavformat/matroskadec.c
@@ -1690,7 +1690,7 @@ static int matroska_read_header(AVFormatContext *s)
             avio_wl16(&b, track->audio.channels);
             avio_wl16(&b, track->audio.bitdepth);
             avio_wl32(&b, track->audio.out_samplerate);
-            avio_wl32(&b, matroska->ctx->duration * track->audio.out_samplerate);
+            avio_wl32(&b, av_rescale((matroska->duration * matroska->time_scale), track->audio.out_samplerate, AV_TIME_BASE * 1000));
         } else if (codec_id == AV_CODEC_ID_RV10 || codec_id == AV_CODEC_ID_RV20 ||
                    codec_id == AV_CODEC_ID_RV30 || codec_id == AV_CODEC_ID_RV40) {
             extradata_offset = 26;