Failure to build movie strip proxy / ffmpeg incompatibility #87932
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Reference: blender/blender#87932
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System Information
Operating system: Linux-5.11.16-arch1-1-x86_64-with-glibc2.33 64 Bits
Graphics card: NVIDIA GeForce 940M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 465.27
Blender Version
Broken: version: 2.92.0, branch: makepkg (modified), commit date: 2021-02-24 16:25, hash:
02948a2cab
Worked: version 2.92.0, branch: master, commit date: 2021-02-24 16:25, hash:
02948a2cab
Short description of error
In VSE, when I want to build the proxy, it pretends that the proxy is being built but when it finishes, the proxy is not actually used. When I run blender from terminal, I can see error messages
Error encoding proxy frame X for '<path>'
where X are frame numbers from 0 up and<path>
is the path to the proxy file.Other important info
The version of blender where this behaviour happens is the version from the Arch Linux community repository. The behaviour reported in this bug does not happen with blender downloaded from the official blender download page. However, there is a different bug reported for the Arch blender package (see https://bugs.archlinux.org/task/70630?project=5&string=blender) where one of the maintainers of the package says
and further suggests that that issue could be resolved if blender was made (more) compatible with newer ffmpeg. That issue is not related to mine but since it is revolves around ffmpeg, I think it might be very relevant to my issue as well.
I've reported this bug in the Arch package bug tracker as well (see https://bugs.archlinux.org/task/70657?project=5&string=blender) but I suspect I will get similar answer as for the other bug mentioned above.
Exact steps for others to reproduce the error
See the attached screen recording: screenrec-2021-04-30_10.44.59.mkv
From #88459:
I have a short video clip in Matroska format (see below for details). With the 2.92 and 2.83.13 official binaries creating a VSE proxy for this video works as expected. But with the Arch Linux 2.92 package and a locally built 3.0 alpha version VSE proxy generation fails:
Can't send video frame: Invalid argument
, apparently coming fromI suspect this is an issue related to the used FFmpeg version. As reported in system-info.txt these differ:
Are there restrictions on which FFmpeg versions are used when building Blender? My current globally installed ffmpeg is 4.4.
Exact steps for others to reproduce the error
Video contents:
Added subscriber: @zegkljan
#88647 was marked as duplicate of this issue
#88459 was marked as duplicate of this issue
Added subscriber: @charbel
Yes, the move from ffmpeg 4.3 to 4.4 in the Arch Linux blender package definitely caused some issues when rendering with audio and who knows what other stuff got broken too.
Added subscribers: @PaulMelis, @lichtwerk
Added subscriber: @iss
@iss: does this ring a bell?
Added subscriber: @ZedDB
Yes, But I will invite @ZedDB here as he would know more about Linux env.
This is a bit shot in the dark, but
Can't send video frame: Invalid argument
could be possibly resolved by D10988. There may be other inconsistencies in current code vs intended FFmpeg usage though. Message implies that encoder is set up incorrectly.I can reproduce this issue.
I'll look into exactly which is the invalid argument.
I found the issue and created a patch. https://developer.blender.org/D11390
Could you try it out @zegkljan ? Just to confirm that nothing else funny is going on that I missed?
I have never built blender myself but I can try to modify the
PKGBUILD
of the arch package to include the patch.Yes, that is easier and exactly the same thing in the end.
Let me know how it goes :)
@ZedDB What revision should I apply the patch to? It fails for the 2.92.0 version which is specified in the current PKGBUILD.
3.0 . You said in your report that you had a locally built 3.0 version.
Why didn't you try it out on that?
2.92 is not receiving any more patches or releases.
No, that part of the report was added later by someone else when merging duplicate reports. Will try with 3.0, thanks.
Added subscriber: @tintwotin
This issue was referenced by
fe4cbe62df
This issue was referenced by
3311350670
Changed status from 'Needs Triage' to: 'Resolved'