[FFmpeg-devel] [PATCH] exporting mpeg user_data

Måns Rullgård mans
Wed Mar 19 09:33:22 CET 2008

Michael Niedermayer <michaelni at gmx.at> writes:

> On Wed, Mar 19, 2008 at 02:12:42AM +0000, M?ns Rullg?rd wrote:
> [...]
>> >> > Michael says: see FF_OPT_TYPE_BINARY
>> >> > M?ns Rullg?rd says: This makes no sense at all.
>> >> 
>> >> Honestly, I have to plead ignorance on this one. I don't fully know
>> >> what the hell I'm doing, I'm not intimately familiar with the
>> >> design of ffmpeg. So, being a complete noob, I simply copied what
>> >> was done for the extradata field.
>> >
>> > look at AVFormatContext.key/keylen and the cryptokey entry as references
>> > also dont hesitate to read the code in opt.c related to FF_OPT_TYPE_BINARY
>> This is a decoder output field.  Setting it doesn't make sense.  Even
>> if the encoder supported user_data injection, this would be the wrong
>> place to set it.
> It of course should be in AVCodecContext but key/keylen is a example of a

It's not the field being in AVCodecContext I'm saying is wrong, but
the entry for it in the AVOption array.  There is no sense in setting
it from the command line, especially when it is an output-only field.

M?ns Rullg?rd
mans at mansr.com

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