Still stuck

[Tim-Philipp Müller]

On Thu, 2013-03-07 at 11:54 -0700, Gary Thomas wrote:
> >
> > gdppay / dpdepay might work (but also transmit some metadata and caps)
> 
> I tried that like this:
>    gst-launch -e -v v4l2src device=/dev/video1 queue-size=16 \
>     ! video/x-raw-yuv,format='(fourcc)UYVY',width=720,height=480,framerate=30/1 \
>     ! tee name=v-src \
>       v-src. ! queue leaky=upstream ! videoscale ! "video/x-raw-yuv,width=320,height=240" ! gdppay ! tcpserversink host=localhost port=61000 \
>       v-src. ! queue leaky=upstream ! videoscale ! "video/x-raw-yuv,width=240,height=120" ! gdppay ! tcpserversink host=localhost port=61001 \
>       v-src. ! queue leaky=upstream ! gdppay ! tcpserversink host=localhost port=61002 \
> and
>    gst-launch -vvv tcpclientsrc host=localhost port=61001 \
>      ! gdpdepay \
>      ! ffmpegcolorspace ! ximagesink force-aspect-ratio=true
> 
> Which yielded this error:
>    /GstPipeline:pipeline0/GstGDPDepay:gdpdepay0.GstPad:src: caps = video/x-raw-yuv, width=(int)240, height=(int)120, format=(fourcc)UYVY, 
> framerate=(fraction)30/1,interlaced=(boolean)false, pixel-aspect-ratio=(fraction)3/4
>    ERROR: from element /GstPipeline:pipeline0/GstTCPClientSrc:tcpclientsrc0: Internal data flow error.
>    Additional debug info:
>    gstbasesrc.c(2625): gst_base_src_loop (): /GstPipeline:pipeline0/GstTCPClientSrc:tcpclientsrc0:streaming task paused, reason not-negotiated (-4)
>    ERROR: pipeline doesn't want to preroll.


Ok, so a caps problem somewhere.


> So I tried to add caps to help out:
>    gst-launch -vvv tcpclientsrc host=localhost port=61001 \
>      ! gdpdepay \
>      ! "video/x-raw-yuv,format=(fourcc)UYVY,width=240,height=120,framerate=(fraction)30/1" \
>      ! ffmpegcolorspace ! ximagesink force-aspect-ratio=true
> 
> No change.

Yeah, that's not going to work. gdpdepay should replicate the input
caps, so just adding caps there is at best not going to do anything and
at worst create a not-negotiated error (if incompatible in some way).

The input caps contain a pixel-aspect-ratio=(fraction)3/4 , so you will
likely need a videoscale in front of ximagesink as well (since
ximagesink can't scale and probably has square-ish pixels, so that needs
fixing up).

Cheers
 -Tim