[FFmpeg-trac] #7855(avformat:reopened): Last subtitle in MP4 is displayed forever
FFmpeg
trac at avcodec.org
Fri Apr 19 04:49:22 EEST 2019
#7855: Last subtitle in MP4 is displayed forever
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Reporter: fumoboy007 | Owner:
Type: defect | Status: reopened
Priority: normal | Component: avformat
Version: git-master | Resolution:
Keywords: mp4, | Blocked By:
mov_text |
Blocking: | Reproduced by developer: 1
Analyzed by developer: 0 |
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Comment (by fumoboy007):
Replying to [comment:9 mkver]:
> ISO/IEC 14496-17 is absolutely uninformative for this question:\\
> "[T]o each text access unit a single time stamp applies. The
time stamp assigned to a text access unit indicates the time at which the
text access unit is to be presented on the display."
>
> And the reason for this is that the carriage of timed text in mp4 is
actually described in 14496-30, a document which doesn't seem to be
available for free.
Ah! Does this [https://mpeg.chiariglione.org/standards/mpeg-4/timed-text-
and-other-visual-overlays-iso-base-media-file-format/isoiec-14496-30
draft] have enough information?
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Ticket URL: <https://trac.ffmpeg.org/ticket/7855#comment:10>
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