[gstreamer-bugs] [Bug 551509] gst_base_transform_prepare_output_buffer: assertion failed: (*out_buf != NULL)

[GStreamer (bugzilla.gnome.org)]

If you have any questions why you received this email, please see the text at
the end of this email. Replies to this email are NOT read, please see the text
at the end of this email. You can add comments to this bug at:
  http://bugzilla.gnome.org/show_bug.cgi?id=551509

  GStreamer | gstreamer (core) | Ver: HEAD CVS

Tim-Philipp Müller changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |t.i.m at zen.co.uk
             Status|UNCONFIRMED                 |NEEDINFO
            Summary|ERROR:(gstbasetransform.c:11|gst_base_transform_prepare_o
                   |44):gst_base_transform_prepa|utput_buffer: assertion
                   |re_output_buffer: assertion |failed: (*out_buf != NULL)
                   |failed: (*out_buf != NULL)  |




------- Comment #2 from Tim-Philipp Müller  2008-09-11 19:53 UTC -------
> setting the framerate via capsfilter is the method we document for
> pngdec/jpegdec to not eos after first picture. This is needed to
> produce a stream with freeze to e.g. overlay an image on a video
> with videomixer.

Where is this documented?

If you put a caps filter *before* jpegdec and set a framerate there, jpegdec
will assume the input is a stream of multiple jpeg pictures and packetised, ie.
one-buffer-per-image. The above 'failed to decode' error is due to you not
specifying the right block-size on the filesrc, so jpegdec expects a full
picture as input but only gets a chunk of it.

Basetransform shouldn't abort of course, this definitly needs fixing.


-- 
See http://bugzilla.gnome.org/page.cgi?id=email.html for more info about why you received
this email, why you can't respond via email, how to stop receiving
emails (or reduce the number you receive), and how to contact someone
if you are having problems with the system.

You can add comments to this bug at http://bugzilla.gnome.org/show_bug.cgi?id=551509.