[FFmpeg-devel] [PATCH] Speex parser

Justin Ruggles justin.ruggles
Sun Aug 30 23:49:56 CEST 2009

Michael Niedermayer wrote:

> On Sun, Aug 30, 2009 at 10:40:45AM -0400, Justin Ruggles wrote:
>> Hi,
>> 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.


More information about the ffmpeg-devel mailing list