[FFmpeg-devel] [PATCH 2/2] lavf/assenc: handle extra sections after Events

[Rodger Combs]

> On Apr 9, 2015, at 06:55, wm4 <nfxjfg at googlemail.com> wrote:
> 
> On Thu, 9 Apr 2015 06:12:53 -0500
> Rodger Combs <rodger.combs at gmail.com> wrote:
> 
>> 
>>> On Apr 8, 2015, at 14:25, Michael Niedermayer <michaelni at gmx.at> wrote:
>>> 
>>> On Sat, Apr 04, 2015 at 05:31:22AM -0500, Rodger Combs wrote:
>>>> ---
>>>> libavformat/assenc.c | 28 ++++++++++++++++++++++++++--
>>>> 1 file changed, 26 insertions(+), 2 deletions(-)
>>> 
>>> do you have a testcase for this which you can share ?
>>> 
>>> [...]
>>> 
>>> -- 
>>> Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
>>> 
>>> I have often repented speaking, but never of holding my tongue.
>>> -- Xenocrates
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>> 
>> 
>> This is the file I was primarily looking at with when writing the patch (received on IRC from a user wanting a fix for this issue): https://dl.dropboxusercontent.com/u/54253260/extra_data_extra_pain.mks <https://dl.dropboxusercontent.com/u/54253260/extra_data_extra_pain.mks>
> 
> Ah, I think I also had to deal with such a file. IMO it's a muxer bug
> to arrange the extradata in this way. Does newest mkvmerge still do
> this?
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As discussed on IRC, this is the de-facto standard behavior with ASS. Both ffmpeg and mkvmerge use this format, both internally (extradata) and in MKVs (CodecPrivate).