[gst-devel] gst-launch script problem

[Marco Ballesio]

Hi,

2010/4/29 Josep Creus Portolés <creus at ac.upc.edu>

> Hello there,
>
> I'd used this script about 3 or 4 months ago (Ubuntu 9.10 updated
> regularly):
>
> # First Pass
> gst-launch-0.10 filesrc location="video1.mpg" \
> { ! decodebin ! deinterlace ! videoscale method=2 ! videocrop left=6
> right=8 top=2 bottom=6 ! video/x-raw-yuv, width=454, height=358 !
> videobox border-alpha=0 alpha=1 right="-266" top="-124" bottom="-94" !
> videomixer name=mix ! ffmpegcolorspace ! xvidenc pass=1
> statsfile="videoproc.log" trellis=true ! fakesink } \
> { filesrc location="video2.mpg" ! decodebin ! deinterlace ! videoscale
> method=2 ! videocrop left=6 right=8 top=2 bottom=6 ! video/x-raw-yuv,
> width=268, height=224  ! videobox border-alpha=0 alpha=1 left="-452"
> top="-138" bottom="-214" ! mix. } \
> { multifilesrc location="background.png" num-buffers=$1 ! image/png,
> framerate=25/1 ! pngdec ! ffmpegcolorspace ! mix. }
>
> # Second Pass
> gst-launch-0.10 filesrc location="video1.mpg" \
> { ! decodebin ! deinterlace ! videoscale method=2 ! videocrop left=6
> right=8 top=2 bottom=6 ! video/x-raw-yuv, width=454, height=358 !
> videobox border-alpha=0 alpha=1 right="-266" top="-124" bottom="-94" !
> videomixer name=mix ! ffmpegcolorspace ! xvidenc pass=2
> statsfile="2cam.log" bitrate=140000 trellis=true ! avimux ! filesink
> location="videoproc.avi" } \
> { filesrc location="video2.mpg" ! decodebin ! deinterlace ! videoscale
> method=2 ! videocrop left=6 right=8 top=2 bottom=6 ! video/x-raw-yuv,
> width=268, height=224  ! videobox border-alpha=0 alpha=1 left="-452"
> top="-138" bottom="-214" ! mix. } \
> { multifilesrc location="backgorund.png" num-buffers=$1 ! image/png,
> framerate=25/1 ! pngdec ! ffmpegcolorspace ! mix. }
>
> Now, it give me a warning and does nothing:
>  (gst-launch-0.10:3344): GLib-WARNING **: g_set_prgname() called
> multiple times
> WARNING: erroneous pipeline: could not link videocrop0 to videobox0
>

Probably something is wrong with caps negotiation. Try setting in your
script:

export GST_DEBUG=GST_CAPS:5

re-run the pipeline and check the misaligned caps.

Regards


>
> I've tryed to use a ffmpegcolorspace between the two elements, but
> doesn't solve anything. Changing the decobin  for a
> mpegpsdemux+mpeg2dec doesn't give me an error but keeps pre-rolling to
> the end of time.
>
> I'm quite desperate, that worked fine for some time, what is the
> problem? Need queues? More cow bell? Is there another better method? XML
> defined filter chain may be?
>
> Greetings,
>
> Josep
>
>
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