NULL caps question

[Jorge Fernandez Monteagudo]

>> I would like to know how to solve a problem I have running the next pipeline:
>>
>> # gst-launch filesrc location=/home/root/video31_aac.mp4 ! qtdemux ! omx_mpeg4dec ! gpuvsink
>> Setting pipeline to PAUSED ...
>> Pipeline is PREROLLING ...
>> Width :800, Height: 600
>>
>> (gst-launch-0.10:1518): GStreamer-CRITICAL **: gst_pad_fixate_caps: assertion `!gst_caps_is_empty (caps)' failed
>>
>> (gst-launch-0.10:1518): GStreamer-CRITICAL **: gst_pad_set_caps: assertion `caps == NULL || gst_caps_is_fixed (caps)' failed
>>
>> ** (gst-launch-0.10:1518): CRITICAL **: gst_render_bridge_set_caps: assertion `caps' failed
>>
>> I've checked the gpuvsink code and I've found the failed assert (snip)
>
>You should check where the first CRITICAL warning comes from, that's
>likely where the cause of the problem is. Run
>
> $ G_DEBUG=fatal_warnings gdb --args /usr/bin/gst-launch-0.10 ....
>
>then type 'bt' when it breaks at the warning.

Ufff, I get an endless

(gdb) bt
#0  0x4059b2dc in raise () from /lib/libc.so.6
#1  0x4059f6c8 in abort () from /lib/libc.so.6
#2  0x4059f6c8 in abort () from /lib/libc.so.6
#3  0x4059f6c8 in abort () from /lib/libc.so.6
#4  0x4059f6c8 in abort () from /lib/libc.so.6
#5  0x4059f6c8 in abort () from /lib/libc.so.6
#6  0x4059f6c8 in abort () from /lib/libc.so.6
#7  0x4059f6c8 in abort () from /lib/libc.so.6
...
#1948 0x4059f6c8 in abort () from /lib/libc.so.6
#1949 0x4059f6c8 in abort () from /lib/libc.so.6
#1950 0x4059f6c8 in abort () from /lib/libc.so.6
#1951 0x4059f6c8 in abort () from /lib/libc.so.6
#1952 0x4059f6c8 in abort () from /lib/libc.so.6
#1953 0x4059f6c8 in abort () from /lib/libc.so.6
#1954 0x4059f6c8 in abort () from /lib/libc.so.6
---Type <return> to continue, or q <return> to quit---


>> Is it possible to force a caps from the command line?
>
>You can add a capsfilter before the sink, but that's just papering over
>some critical bug.
>
>Ideally you should also try to upgrade to 1.x if possible at all. 0.10
>hasn't been maintained for years now.

It's complicated. I'm using a TI demoboard with their own root filesystem with custom components. The working pipeline is:

gst-launch filesrc location=/home/root/video31_aac.mp4 ! qtdemux ! omx_mpeg4dec ! omx_scaler ! omx_ctrl display-mode=OMX_DC_MODE_1080P_60 ! omx_videosink display-mode=OMX_DC_MODE_1080P_60 enable-last-buffer=false

and I would like to use a component to get the video frame and paint it using OpenGL-ES instead of dumping it to the framebuffer...

Thanks anyway!
Jorge

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