[FFmpeg-devel] [PATCH] stop av_find_stream_info per packet dts

Baptiste Coudurier baptiste.coudurier
Sun Mar 15 04:50:25 CET 2009

Michael Niedermayer wrote:
> On Sat, Mar 14, 2009 at 08:25:25PM -0700, Baptiste Coudurier wrote:
>> Hi
>> It seems stopping av_find_stream_info by packet duration causes a
>> problem when a packet with long duration (still image, sub) is very long.
>> Scenario:
>> 1 video stream containing a single image with very long duration
>> 1 video stream cfr.
>> Demuxing will happen in this order since dts are in this order.
>> av_find_stream_info will stop after the single image, while the next
>> packet dts will still be < max analyze duration.
>> I'd like your opinion on this I don't know if this might have side effects.
> i think the idea is good but dts might not start at 0 (cut mpeg-ps/ts being
> an example)
> also before you write a patch that sums dts differences, this can break
> with timestamp discontinuities.
> maybe something like using the previous sum of durations for each stream
> instead of the latest?

Like this ?

Baptiste COUDURIER                              GnuPG Key Id: 0x5C1ABAAA
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FFmpeg maintainer                                  http://www.ffmpeg.org
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