[gstreamer-bugs] [Bug 573176] video stream from single png image fails

[GStreamer (bugzilla.gnome.org)]

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  GStreamer | gst-plugins-good | Ver: 0.10.13




------- Comment #2 from Simon Ortling  2009-02-26 07:20 UTC -------
(In reply to comment #1)
> Simon: it says "no framerate set on the *sink* caps", ie. before the pngdec.

i have tried rearranging the gst-launch pipeline to this (python, no idea how
to set sink caps for gst-launch-0.10):

pngdec = gst.element_factory_make ("pngdec", "png-decoder")
caps = gst.Caps ("""video/x-raw-rgb, framerate=25/1""")
pngdec.get_pad ("sink").set_caps (caps)

It results in the "gstbasetransform.c:1037..."[snip] error from above, maybe
transforming rgb -> yuv is the problem?

> What's the pipeline that you said on IRC used to work before the upgrade?

gst-launch-0.10 filesrc location=$1 ! pngdec ! alphacolor ! ffmpegcolorspace !
videomixer name=mix ! ffmpegcolorspace ! autovideosink videotestsrc !
video/x-raw-yuv, width=640, height=480 ! ffmpegcolorspace ! mix.

pngdec did not send an EOS after frame 1 so the image was kept being displayed.

> (Note: overall use case is how to overlay a still image with videomixer, so we
> should probably add a png and an jpeg example pipeline to the videomixer docs,
> since this is really an FAQ)

Hm, what FAQ do you mean?


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