Bug 1835641

Summary:	FFMS2 isn't loaded automatically
Product:	[Fedora] Fedora	Reporter:	Ivan Molodetskikh <yalterz>
Component:	vapoursynth	Assignee:	Simone Caronni <negativo17>
Status:	CLOSED NOTABUG	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	32	CC:	negativo17
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Hardware:	x86_64
OS:	Unspecified
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Last Closed:	2021-03-23 14:45:16 UTC	Type:	Bug
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Description Ivan Molodetskikh 2020-05-14 08:56:50 UTC

Description of problem:
FFMS2 isn't loaded automatically even when it's installed.

Version-Release number of selected component (if applicable):
vapoursynth-libs-48-7.fc32.x86_64

How reproducible:
Always.

Steps to Reproduce:
1. Install vapoursynth packages
2. Install ffms2 and ffms2-devel
3. Create a test.vpy file with:

from vapoursynth import core
core.ffms2.Source('test.mp4').set_output()

4. vspipe --info test.vpy - 

Actual results:
Script evaluation failed:
Python exception: No attribute with the name ffms2 exists. Did you mistype a plugin namespace?

Traceback (most recent call last):
  File "src/cython/vapoursynth.pyx", line 1946, in vapoursynth.vpy_evaluateScript
  File "src/cython/vapoursynth.pyx", line 1947, in vapoursynth.vpy_evaluateScript
  File "test.vpy", line 2, in <module>
    core.ffms2.Source('test.mp4').set_output()
  File "src/cython/vapoursynth.pyx", line 1679, in vapoursynth._CoreProxy.__getattr__
  File "src/cython/vapoursynth.pyx", line 1539, in vapoursynth.Core.__getattr__
AttributeError: No attribute with the name ffms2 exists. Did you mistype a plugin namespace?

Expected results:
FFMS2 is loaded successfully.

Additional info:
One workaround is to create ~/.local/lib64/vapoursynth/ and symlink libffms2.so there, then put

UserPluginDir=/home/USERNAME/.local/lib64/vapoursynth

into ~/.config/vapoursynth/vapoursynth.conf

Comment 1 Simone Caronni 2021-03-23 14:45:16 UTC

Hello, the documentation of vapoursynth says the following about plugin locations:

http://vapoursynth.com/doc/plugins.html#linux

The problem is that the package to work out of the box would need to put the plugin in /usr/lib64/vapoursynth, otherwise you need to configure one of the two variables as described in the documentation.

Comment 2 Ivan Molodetskikh 2021-03-23 14:53:30 UTC

Is it possible for the vapoursynth or the ffms2 package to create the necessary /usr/lib64/vapoursynth symlink automatically or configure it to work out of the box?