[FFmpeg-devel] [PATCH] Add WebM to the Matroska demuxer name

Baptiste Coudurier baptiste.coudurier
Thu Jul 15 23:46:28 CEST 2010


On 07/15/2010 02:37 PM, Reimar D?ffinger wrote:
> On Thu, Jul 15, 2010 at 11:12:40PM +0200, Reimar D?ffinger wrote:
>> On Thu, Jul 15, 2010 at 04:57:40PM -0400, Alex Converse wrote:
>>> On Thu, Jul 15, 2010 at 4:30 PM, Reimar D?ffinger
>>> <Reimar.Doeffinger at gmx.de>  wrote:
>>>> On Thu, Jul 15, 2010 at 04:10:29PM -0400, Alex Converse wrote:
>>>>> So am I going to wind up burying this patch because we can't agree on
>>>>> what the ideal libavformat API should be?
>>>>>
>>>>> What's making me irritated here is the patch is not being held up
>>>>> because it is broken but because people dislike the established
>>>>> interfaces.
>>>>
>>>> It is "broken" in so far as it _will_ break MPlayer, MPlayer
>>>> uses the short name to decide whether to accept or reject an
>>>> autodetection (since for some formats the lavf demuxers
>>>> are not working well enough).
>>>> This may not have been the intended use, but it seems likely
>>>> to me other applications may have misused it in similar ways,
>>>> since I am not aware of any other way to uniquely identify a
>>>> _given_ AVInputFormat.
>>>
>>> Under the current ABI it is a comma separated list that is allowed to
>>> grow (though It grows quite infrequently). It seems like doing it the
>>> right way is possible under the current ABI (all you would have to do
>>> is compare the first name up until the first comma or NUL). Perhaps
>>> you can enlighten us on why mplayer feels it necessary to do it the
>>> way it does.
>>
>> Probably for the same reason that av_guess_format does that?
>
> Btw. even av_find_input_format is rather questionable in my opinion.
> av_find_input_format(format->name) will return nothing for all formats
> that contain a ',' in name.

No, it will return the format.

-- 
Baptiste COUDURIER
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