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Message #00077
[Bug 822354] Re: Python-popen errors with MLT 0.7.4
Well, Mael wrote the code, I just applied the patch :-)
Good to see that it fixes the problem. I assume you won't be releasing
another version of AVLinux before September (our projected estimate for
1.4)?
** Changed in: openshot
Milestone: None => 1.4.0
** Changed in: openshot
Status: New => Fix Committed
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https://bugs.launchpad.net/bugs/822354
Title:
Python-popen errors with MLT 0.7.4
Status in OpenShot Video Editor:
Fix Committed
Bug description:
Hi,
In AV Linux 5.0 I used a custom 0.7.3 MLT version from GIT that
avoided many of the issues of 0.7.2, since MLT 0.7.4 has been released
I am using it here in development and am seeing issues with both
Openshot and Kdenlive (Kdenlive is now resolved).
With Openshot 1.3.1 an upgrade to 0.7.4 results in the dreaded 'no
codecs found' error which generally seems to imply that the melt
executable is not being found correctly or at all. If I launch
Openshot from the terminal everything looks normal and there is a
large amount of output from the liblrdf scan of the numerous LADSPA
audio plugins on the system (also normal due to MLT's blessed new
ability to hook into LADSPAs). The problem seems to occur at the end
of the scan where I am seeing this error:
There were some errors calling melt using os.Popen()
There were some errors calling melt using os.Popen()
There were some errors calling melt using os.Popen()
The MLT issue with Kdenlive may shed some light on this because MLT
0.7.4 has moved from using 'stderr' for querying melt to using
'stdout'. I asked Dan Dennedy about this on the mlt-mailing list and
he personally wasn't seeing this issue with Openshot 1.3.1 and thought
that python-popen should be able to handle this change from stderr to
stdout. In my experience and using the same build/packaging methods I
am now seeing this error and Openshot is not working with MLT 0.7.4.
Let me clarify that the existing 0.7.3GIT MLT is doing the job quite
nicely with Openshot 1.3.1 however since you are working on the 1.4
release which will most likely be using MLT 0.7.4 when it's complete I
thought I'd share my findings in case there are other similar issues
with MLT 0.7.4.
Looking forward to the 1.4 release! Best Regards, Glen MacArthur - AV
Linux maintainer.
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