[FFmpeg-cvslog] movenc: Write track durations with all bits set if duration is unknown

[Martin Storsjö]

ffmpeg | branch: master | Martin Storsjö <martin at martin.st> | Sat Jan 28 00:28:19 2012 +0200| [99a357f4c5091293bc42cb4bbd7bcae6a2624584] | committer: Martin Storsjö

movenc: Write track durations with all bits set if duration is unknown

According to 14496-12, the duration should be all 1s if
the duration is unknown. This is the case if writing a moov
atom without any samples described in it (e.g. as in ismv files).

Signed-off-by: Martin Storsjö <martin at martin.st>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=99a357f4c5091293bc42cb4bbd7bcae6a2624584
---

 libavformat/movenc.c |   10 ++++++++--
 1 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index ace7b2f..58d3c56 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -1317,7 +1317,10 @@ static int mov_write_mdhd_tag(AVIOContext *pb, MOVTrack *track)
         avio_wb32(pb, track->time); /* modification time */
     }
     avio_wb32(pb, track->timescale); /* time scale (sample rate for audio) */
-    (version == 1) ? avio_wb64(pb, track->track_duration) : avio_wb32(pb, track->track_duration); /* duration */
+    if (!track->entry)
+        (version == 1) ? avio_wb64(pb, UINT64_C(0xffffffffffffffff)) : avio_wb32(pb, 0xffffffff);
+    else
+        (version == 1) ? avio_wb64(pb, track->track_duration) : avio_wb32(pb, track->track_duration); /* duration */
     avio_wb16(pb, track->language); /* language */
     avio_wb16(pb, 0); /* reserved (quality) */
 
@@ -1361,7 +1364,10 @@ static int mov_write_tkhd_tag(AVIOContext *pb, MOVTrack *track, AVStream *st)
     }
     avio_wb32(pb, track->track_id); /* track-id */
     avio_wb32(pb, 0); /* reserved */
-    (version == 1) ? avio_wb64(pb, duration) : avio_wb32(pb, duration);
+    if (!track->entry)
+        (version == 1) ? avio_wb64(pb, UINT64_C(0xffffffffffffffff)) : avio_wb32(pb, 0xffffffff);
+    else
+        (version == 1) ? avio_wb64(pb, duration) : avio_wb32(pb, duration);
 
     avio_wb32(pb, 0); /* reserved */
     avio_wb32(pb, 0); /* reserved */