[FFmpeg-devel] [PATCH] Speex parser
Sun Aug 30 23:49:56 CEST 2009
Michael Niedermayer wrote:
> On Sun, Aug 30, 2009 at 10:40:45AM -0400, Justin Ruggles wrote:
>> Here is a Speex parser. It does not split any frames, but only analyzes
>> them in order to set the proper AVCodecContext parameters.
> the decoder can do this, av_find_stream_info() should already create a
> decoder to fill these in when they are missing.
Why should it have to rely on the decoder...especially since we do not
have a native decoder? So that one MUST compile in an external library
for stream copy to work properly.
>> It is useful mainly for stream copy when no header is present or if some
>> values in the header are encoded as "unknown". Also, if the extradata
>> is missing, the parser will create it using correct values. This is
>> better than what is done currently in the FLV demuxer, which guesses
>> some header values based on defaults and sets some as "unknown".
> it seems creating fake(1) extradata belongs more in a bitstream filter than
> a parser
> (1) fake in the sense that it does not exist like that in the container
Ok, I'll look into that.
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