When opening AV1 files, the application shows "Error opening file: Unable to obtain a valid pixel format from file."

[dscp46]

Describe the bug
When opening AV1 files, the application shows "Error opening file: Unable to obtain a valid pixel format from file."

To Reproduce
Steps to reproduce the behavior:

1. Press Ctrl+O to open file
2. Select "201411_blender_big_buck_bunny_24fps_1080p_av1.mp4" then click on "Open"
3. Error is shown on screen (see below for screenshot).

The issue has been reproduced with other container types, and other AV1 files. Please note that all the tested files are properly played and rendered by VLC.

Could you send me a valid test file so I can confirm if it's a file issue or a legitimate bug?

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots

Version (please complete the following information):

• OS: Debian Bookworm (12)
• Version 2.14, flatpak package downloaded from the release page.

[ChristianFeldmann]

Hi! Thx for the report. Could you send me the file? If you can not share it publicly then you can also send it to me vial E-Mail.
Christian

[dscp46]

Hi,

Here are the files as requested:
201411_blender_big_buck_bunny_24fps_1080p_av1.mp4
201411_blender_big_buck_bunny_60fps_2160p_av1.mp4

The MKV versions have been remuxed with ffmpeg (-i filename.mp4 -vcodec copy -acodec copy out.mkv).

Kind regards

[ChristianFeldmann]

I tried to recreate the issue. I observed 2 things:

• When using the FFmpeg decoder, everything works for me
• When using the dav1d decoder integration, decoding does not work. However, I am getting a different error message:
  

@dscp46 Do you observe this using FFmpeg as a decoder for AV1 or dav1d. If its FFmpeg, which version are you using.

[dscp46]

I tried to recreate the issue. I observed 2 things:

* When using the FFmpeg decoder, everything works for me

* When using the dav1d decoder integration, decoding does not work. However, I am getting a different error message:
  ![image](https://private-user-images.githubusercontent.com/11556397/298880188-7c207966-f37f-4793-9383-3f19cd8ec89d.png?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.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.3URkE_djYs3HDpA3dKTDp68omEo6GGjSJQeXHAj6prw)

@dscp46 Do you observe this using FFmpeg as a decoder for AV1 or dav1d. If its FFmpeg, which version are you using.

I got the same message as you when using dav1d from Windows 10 with the last release.
When using the flatpak file, are all external libs included inside, or do I need to report the versions of the libs installed on my host OS?

[ChristianFeldmann]

The releases that we ship do not contain ffmpeg or libdav1d. So you have to install ffmpeg on your system and somehow make it discoberable to your system. Or you can specify the library paths in the YUView settings. On debian it should be enough to use your package manager to install ffmpeg to make YUView find it.

[dscp46]

I've tried to load /usr/lib/x86_64-linux-gnu/libavutil.so.57.28.100, /usr/lib/x86_64-linux-gnu/libavformat.so.59.27.100, /usr/lib/x86_64-linux-gnu/libavcodec.so.59.37.100 and /usr/lib/x86_64-linux-gnu/libswresample.so.4.7.100, which are provided by debian bookworm's repository to no avail: I was told to save the attached file:
fail-ffmpeg.log

When trying to load /usr/lib/x86_64-linux-gnu/libdav1d.so.6.6.0, I've got the following error message, which I don't have when loading /usr/lib/x86_64-linux-gnu/libdav1d.so.4.0.2 (an obsolete version I still have from prior my system upgrade from Debian 11 (bullseye), or the one you've supplied on your download menu, but I've got the behaviour mentionned in the first comment of this ticket with them.

Apparently, the following versions of ffmpeg libs are used when I try to open AV1 files, but I don't understand from where they're pulled, since these versions are not installed on my system:

[dscp46]

One thing I've noticed in the info pane is that libdav1d doesn't seem to be selected when valid versions of libdav1d (including the one referenced in the 'Help' menu) is selected and defined as the default AV1 decoder: