No Video

[Krzysztof Konopko]

On 07/01/13 10:06, Ian Davidson wrote:
> Thanks David,
> 
> The program ran after removing the single quotes - but just like my
> other program, the video does not show.
> I don't know whether this is significant - I run the program and it is
> supposed to start recording, then I press Ctrl-C to stop the recording. 
> Have I got a problem where the file has not been 'finalised'?  If so, it
> would be because I do not know how to capture the Ctrl-C and tell the
> pipeline to stop.
> 
> Ian
> 
> On 07/01/2013 09:51, David Röthlisberger wrote:
>> On 7 Jan 2013, at 09:17, Ian Davidson wrote:
>>> Hi Kris,
>>>
>>> You are correct when you say that you did not explain why my program
>>> didn't work - but I tried your advice and now have 2 programs which
>>> don't work.
>>>
>>> I use a gst_parse_launch, passing it a string such as
>>> "v4l2src norm=PAL ! videorate !
>>> 'video/x-raw,format=(string)I420,width=320,height=240,framerate=(fraction)25/1'
>>> ! queue ! mux. alsasrc ! audioconvert !
>>> 'audio/x-raw,rate=44100,channels=2' ! queue ! mux. avimux name=mux !
>>> filesink location=file.avi"
>>> but when I run the program I get a message
>>> GStreamer-CRITICAL **: gst_element_make_from_uri: assertion
>>> `gst_uri_is_valid (uri)' failed
>> Have you tried removing the single-quotes? When you pass that to
>> gst-launch on the command line, the shell will have stripped the
>> quotes off, so what gst-launch saw isn't the same as what you are
>> passing to gst_parse_launch.
>>
>> _______________________________________________
>> gstreamer-devel mailing list
>> gstreamer-devel at lists.freedesktop.org
>> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>>
> 

OK, got it. You need to send EOS and wait for the EOS message rather
than simple quit the main loop. AVI muxer needs to finalize the output.

gst_element_send_event (pipeline, gst_event_new_eos ());

Kris