[Ffmpeg-devel] Decode a RTP stream in H.263

[Michael Niedermayer]

Hi

On Thu, Nov 30, 2006 at 10:05:22AM +0000, Cool_Zer0 wrote:
> Hi there!
> 
> I have a question. I've look on the documentation sectional of FFMpeg page
> and check the code but I can't figured it out.
> 
> 
> My main purpose, for now, is decode H.263, that I receive by RTP, and then
> show it on my PDA screen.
> 
> So... I already have the RTP stack and I can extract the encoded 
> H.263packet.
> 
> My main question when I look through "libavcodec/h263dec.c" is that you have
> a decode_init(), a decode_end() and then a decode_frame(). (I think I'm
> right!!!)
> 
> 
> And now the ultimate question:
> - Can I call decode_frame() for each packet that I receive?
> - What will happen if the packet that I received doesn't contain the
> complete frame?

you will have to use a AVParser

> 
> 
> Another question:
> 
> On decode_init() you have:
> 
> /* select sub codec */
> switch(avctx->codec->id) {
>   case CODEC_ID_H263: ...
>   case CODEC_ID_MPEG4: ...
>   case CODEC_ID_MSMPEG4V1: ...
>   ...
>   case CODEC_ID_FLV1: ...
> 
> I'm wondering if that switch is to say: "The result of the decoding process
> will be a [MPEG4, WMV3, ...]".... Can't I say that I want the result on YUV
> or RGB?

go and read apiexample.c

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

In the past you could go to a library and read, borrow or copy any book
Today you'd get arrested for mere telling someone where the library is