[FFmpeg-devel] [PATCH] Add support for private PES streams in mpegts and support for application decoding the stream

[Sebastian Cabot]

I saw that. Thanks.
Still you don't fill the data so what av_read_frame will return?

Sebastian

On Sun, May 31, 2009 at 9:48 AM, Baptiste Coudurier
<baptiste.coudurier at gmail.com> wrote:
> Sebastian Cabot wrote:
>> On Sun, May 31, 2009 at 7:05 AM, Baptiste Coudurier
>> <baptiste.coudurier at gmail.com> wrote:
>>> Sebastian, can you please tell us what do you need to be able to handle
>>> these streams outside libavformat ?
>>>
>>
>> Yes. No problem.
>>
>> We have private streams in mpegts of type private_stream_2. I need to
>> get the data with in.
>>
>> At first I wrote a special codec as part of libavcodec and inside the
>> TS muxer started dealing with all the stream types separately.
>>
>> It occured to me that this is bad practice. Also having to recompile
>> and link all the library when a change was made is not great. Further
>> more since ffmpeg is LGPL it would be best not to keep private code as
>> part of the main library code.
>>
>> I didn't want to change mpegts muxer to return all streams without a
>> codec Id or type since I didn't know what else that would break. Also
>> even If I returned all streams then I would not get the stream_type
>> back since that is only know once the PAT is processed.
>>
>> So I got to the conclusion that separating the private code into the
>> user domain would be the best approach.
>> Since I couldn't find any way of dynamically loading codecs and there
>> is no support for that in the ts demuxer I just chose the simplest
>> way.
>>
>> So I don't know what all this codec tagging is or how probe will help
>> me unless of course I write my own codec. How ever I saw that at least
>> in the ts demuxer only video is probed. Is this so?
>
> Every streams are probed now, and all streams are exported with stream_type
> stored in AVCodecContext->codec_tag, which should permit you to identify
> streams.
>
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