[FFmpeg-trac] #6915(avformat:open): DASH audio segments duration doesn't match exactly with video segments duration.
FFmpeg
trac at avcodec.org
Thu Dec 21 19:36:13 EET 2017
#6915: DASH audio segments duration doesn't match exactly with video segments
duration.
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Reporter: beloko | Owner: stevenliu
Type: defect | Status: open
Priority: normal | Component: avformat
Version: git-master | Resolution:
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Comment (by j_karthic):
Replying to [comment:34 stevenliu]:
> Replying to [comment:33 j_karthic]:
> > Replying to [comment:31 stevenliu]:
> > > HLS Team have answered the question and about the 4.3.3.1.
EXT-X-TARGETDURATION
> > >
> > > I respect Roger Pantos's and HLS Team's specification.
> > >
> > > Thanks for Apple and HLS Team's clearity explication
> >
> > Yes. That is clear. I am not contesting that. "You can have
TARGETDURATION much higher than the EXTINF duration". The spec only says
"round(EXTINF_duration) <= target_duration", which means for a EXTINF
duration of 2.08 seconds, TARGETDURATION could be 2 second, 3 second, 5
second or 100 seconds. Any target durations greater than or equal to the
rounded segment duration is valid.
>
> I didn't say''' "You can have TARGETDURATION much higher than the EXTINF
duration"''', just round up to looks like plus one.
No, you didn't say it. Sorry for the misunderstanding. I meant, Roger
Pantos has said that. In his own words "It is perfectly legal to have
EXTINF duration that are less than EXT-X-TARGETDURATION. '''Much less, in
fact'''." I just wrote it the other way.
Also he says "To be clear, the EXT-X-TARGETDURATION is the max
('''roughly''') of EXTINF durations. Thats all." Again note the use of the
word "roughly", which one can interpret as 1.08 is roughly 1.
>
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Ticket URL: <https://trac.ffmpeg.org/ticket/6915#comment:36>
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