Still stuck

[Tim-Philipp Müller]

On Thu, 2013-03-07 at 08:20 -0700, Gary Thomas wrote:
> Sorry if this is an old record, but I'm getting nowhere...
> 
> Why does this pipeline work:
>    gst-launch -e -vvv shmsrc socket-path=/tmp/shm-stream.sock \
>      ! "application/x-rtp, sampling=(string)YCbCr-4:2:2, width=(string)720, height=(string)480, payload=(int)96" \
>      ! rtpvrawdepay \
>      ! fakesink
> 
> and this one does not?
>    gst-launch -e -vvv shmsrc socket-path=/tmp/shm-stream.sock \
>      ! "application/x-rtp, sampling=(string)YCbCr-4:2:2, width=(string)720, height=(string)480, payload=(int)96" \
>      ! rtpvrawdepay \
>      ! ffenc_mpeg4 \
>      ! fakesink
> 
> Note: I only added the mpeg4 encoder element which is compatible
> and there are no errors/complaints.
> 
> The elements all have compatible [default] caps and it should
> just work.  If I trade the 'shmsrc'+'rtpvrawdepay' for something
> like 'videotestsrc', both can work.

Well, since you are passing -v to gst-launch already, perhaps have a
look at the caps, different caps might get negotiated.

I suspect ffenc_mpeg4 only takes I420 as input. Try adding an
ffmpegcolorspace in front of the encoder.

Cheers
 -Tim