gst-launch script problem

[Josep Creus]

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

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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[Marco Ballesio]

Hi,

2010/4/29 Josep Creus Portolés <[hidden email]>

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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