TEEing the video

[Ian Davidson]

Using videoconvert has helped me a bit - my test machine now performs in 
a similar manner to the live machine.

Here is the pipeline I am trying
gst-launch-1.0 -e v4l2src ! tee name=vt ! queue ! videorate ! videoscale 
! 
"video/x-raw,format=(string)I420,width=480,height=384,framerate=(fraction)25/1" 
! queue ! videoconvert ! x264enc ! mp4mux name=mux ! filesink 
location=test.mp4 alsasrc ! "audio/x-raw,rate=44100,channels=1" ! tee 
name=at ! queue ! audiorate ! queue ! lamemp3enc ! mux.  at. ! queue ! 
audioconvert ! queue ! wavenc ! filesink location=test.wav vt. ! queue ! 
videoscale ! 
"video/x-raw,format=(string)I420,width=320,height=240,framerate=(fraction)25/1" 
! videoconvert ! autovideosink

When I run it the autovideosink does put up a window with a frame 
displayed in it.  I do not believe that anything useful gets written to 
the mp4 file nor the wav file.  The frame never changes.
To stop gst-launch I have to use Ctrl-C 3 times.  After the first I get
handling interrupt.
Interrupt: Stopping pipeline ...
EOS on shutdown enabled -- Forcing EOS on the pipeline
Waiting for EOS ...

After a while, I give it another Ctrl-C and I got
handling interrupt.
Interrupt while waiting for EOS - stopping pipeline...
Execution ended after 0:00:34.227632246
Setting pipeline to PAUSED ...

After a while, I give it the third Ctrl-C.
The window created by autovideosink now disappears and control now 
returns to the terminal I used to launch the command-line.

I ran with --gst-debug=4 and the trace can be seen here 
https://www.dropbox.com/s/7bqjsl4i23qqd0e/FullPipelineTrace?dl=0

I attempted to repeat the test with the audio stripped out using the 
command line
gst-launch-1.0 -e --gst-debug=4 v4l2src ! tee name=vt ! queue ! 
videorate ! videoscale ! 
"video/x-raw,format=(string)I420,width=480,height=384,framerate=(fraction)25/1" 
! queue ! videoconvert ! x264enc ! mp4mux name=mux ! filesink 
location=test.mp4 vt. ! queue ! videorate ! videoscale ! 
"video/x-raw,format=(string)I420,width=320,height=240,framerate=(fraction)25/1" 
! videoconvert ! autovideosink

It behaved in a very similar manner.  The trace can be seen here 
https://www.dropbox.com/s/x4exu6egg3kndkh/NoAudioTrace?dl=0

I suspect that I don't need quite so many queue elements as I have - but 
would that cause any problems?

What else might I do?


On 22/11/2014 14:46, Ian Davidson wrote:
> Thanks Tim,
>
> That worked on my dev machine.  Tomorrow or Monday, I will see if that 
> cures my Live machine.
>
> Ian
>
> On 22/11/2014 14:33, Tim Müller wrote:
>> On Sat, 2014-11-22 at 14:17 +0000, Ian Davidson wrote:
>>
>> Hi,
>>
>>
>> Try adding a 'videoconvert' element before the autovideosink.
>>
>>   Cheers
>>    -Tim
>>
>
>
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