Image Processing Toolbox Matlab R2020b on RHEL: Could not read file due to an unexpected error. Reason: Unable to initialize the video properties

[Nathan Stratton]

You could rebuild the RPMs.

><>
Nathan Stratton
Founder, CTO
Vocinity, Inc.


On Thu, Jun 30, 2022 at 4:14 PM Rob Kudyba via gstreamer-devel <
gstreamer-devel at lists.freedesktop.org> wrote:

>
> Le jeudi 30 juin 2022 à 12:10 -0400, Rob Kudyba via gstreamer-devel a
>> écrit :
>> > The Matlab script runs just fine on Matlab on a Mac and Windows 10.  Is
>> there
>> > really a missing plugin or does another ENV variable need setting? Math
>> Works
>> > support says this is out of scope from their support, which is pretty
>> lame as
>> > this toolbox clearly isn't working on Linux/RHEL 7.
>> >
>> > Here is the xylophone.mp4 file from
>> > Matlab
>> https://urldefense.proofpoint.com/v2/url?u=https-3A__drive.google.com_file_d_1bQ8cZ9g9rh7Z2Uu-5FkL-5FdqWTGDZeXxoiJ_view-3F&d=DwIFaQ&c=009klHSCxuh5AI1vNQzSO0KGjl4nbi2Q0M1QLJX9BeE&r=A1PpIFuwNsZIZlcr7NaIgFZiSHuhhsbxr5FZE49Rqxc&m=V-7d59_6tBEf8CDBvMP_QUwoO0ZkdCdrKFnec0AE3t7e2ZQBqs0mwNr-MULqWxjL&s=4qCTmzjiy8pEHTd_QOJpN3UKtOhKyjMV1GKHLKLe5os&e=
>> > usp=sharing
>>
>> On Linux there is nothing that needs to be set, the path is embedded in
>> the
>> build and plugin should just be found.
>>
>
> Thanks for confirming that's what I thought.
>
> That being said, perhaps you are simply hitting a bug in this old version
>> of
>> Linux/GStreamer. Current stable gstreamer is 1.20.3, you are at 1.10.X
>> from
>> about 5 years ago. Have you tried with RHEL 8 or 9 ?
>
>
> No I haven't tried those since we're on RHEL 7. I take it that package
> managers won't consider a newer version for RHEL7?
>
> After a lot of trial and error I did find that
> installing gstreamer1-libavm as well as gstreamer1-plugins-{base,good,bad}
> from nux-dextop-testing repo plays both our mp4 as well as the test
> xylophone.mp4:
> gst-launch-1.0 playbin uri=file:///path/to/ColorSamplingVideo_May23.mp4
> Setting pipeline to PAUSED ...
> Pipeline is PREROLLING ...
> Redistribute latency...
> Pipeline is PREROLLED ...
> Setting pipeline to PLAYING ...
> New clock: GstSystemClock
>
> Got EOS from element "playbin0".
> Execution ended after 0:00:05.060604510
> Setting pipeline to PAUSED ...
> Setting pipeline to READY ...
> Setting pipeline to NULL ...
> Freeing pipeline ...
>
> gst-launch-1.0 playbin uri=file:///path.to/xylophone.mp4
>
> Setting pipeline to PAUSED ...
>
> Pipeline is PREROLLING ...
>
> Redistribute latency...
>
> Pipeline is PREROLLED ...
>
> Setting pipeline to PLAYING ...
>
> New clock: GstSystemClock
>
> Got EOS from element "playbin0".
>
> Execution ended after 0:00:04.700583707
>
> Setting pipeline to PAUSED ...
>
> Setting pipeline to READY ...
>
> Setting pipeline to NULL ...
>
> Freeing pipeline ...
>
> And the Matlab script runs.
>
> Thanks so much for the response. Math Works support hasn't been as helpful.
>
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