Linux/AM5728: Ducati encoder issue with Python

Bob Engineer 2

Part Number: AM5728

Tool/software: Linux

I'm trying to use ducatih264enc in a GStreamer pipeline, constructed using Python 3. I can construct pipelines that work correctly, but only if I don't use ducatih264enc. But when I add ducatih264enc in, the pipeline fails to launch. Same pipeline works correctly when launched using gst-launch-1.0.

My suspicion is that Python doesn't know how to create the TI proprietary GStreamer elements, but I stress this is only a suspicion at the moment.

Any help on sorting this out would be greatly appreciated.

over 6 years ago

0 Manisha Agrawal over 6 years ago

TI__Mastermind 22946 points

Hi Bob,

That is true. TI proprietary GStreamer elements are not tested to work with Python scripts.

Regards,

Manisha

0 Bob Engineer 2 over 6 years ago in reply to Manisha Agrawal

Intellectual 530 points

Hi Manisha,

Thanks for confirming that. Does anyone know why they don't work, and how we'd go about fixing this?

Best regards,

Bob.

0 Michael Erdahl over 6 years ago in reply to Bob Engineer 2

TI__Genius 13515 points

Hi Bob,

Thanks for your patience - noticed this was never properly concluded.

We do not have plans today for ducatih264enc gstreamer pipeline + Python testing.

Are you using gst-python bindings or making raw os.system calls?

Regards,
Mike

0 Bob Engineer 2 over 6 years ago in reply to Michael Erdahl

Intellectual 530 points

Hi Mike,

I've moved on to calling gst-launch-1.0 through subprocess.Popen(). Not surprisingly, this works, and allows some level of control of gstreamer from Python. Using Gst directly from Python, e.g. launching a pipeline using Gst.parse_launch() seems not to work for me for pipelines containing ducati elements. I'd prefer to use the python Gst bindings, as I think it would be easier to control the pipeline, and update parameters while the pipeline is running. However I'm not blocked at the moment, and I have work-arounds for all the issues.

Best regards,

Bob.

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Linux/AM5728: Ducati encoder issue with Python