[vlc-devel] RTP/H.264 to MPEG-TS mux bug

Luca Barbato lu_zero at gentoo.org
Sun May 1 17:46:10 CEST 2011

On 5/1/11 4:44 PM, Tim Ouellette wrote:
> Thanks Rémi, maybe I didn't make the issue clear.  The source device
> outputs RTP/H.264/G711 to the network directly.  I need VLC to decode only
> the audio stream (G711) transcode to another format. Repack the data
> (transcoded audio + copy of H264) into MPEG-TS and rebroadcast UDP.
> Would x264.c still be called to create DTS and PTS even though the
> Vcodec is just being passed through?

I doubt.

The main problem here is the fact your h264 input is weird and sends the 
extradata in-band, one rtp packet per nal, all with the same timestamp 
as the following FU-A packet (I got that from the manual of the camera). 
That confuses the muxing layer a lot.

I hacked a bit libav rtpdec_h264 to lump everything together and that 
should solve this particular issue, then you'd need to glue that vlc in 
order to leverage the better muxing/udp output ^^;


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