[kio-extras] [Bug 430266] does not create thumbnail preview for mp4 movies

[Weng Xuetian]

https://bugs.kde.org/show_bug.cgi?id=430266

Weng Xuetian <wengxt at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|CONFIRMED                   |RESOLVED
                 CC|                            |wengxt at gmail.com
         Resolution|---                         |UPSTREAM

--- Comment #19 from Weng Xuetian <wengxt at gmail.com> ---
I just checked this on Archlinux.

The necessary package for me to get it working is ffmpegthumbs-21.04.0-1, and I
also need to manually enable it in doplhin. After that it just works.

Since the report is about opensuse and the only release provides 20.12 in
opensuse is tumbleweed, so I just go ahead and try that in the VM and
downloaded some random mp4 file. And here's what I found.

The error reported in dolphin is "Could not find video stream", so indeed there
some error happens. After further investigation, I installed ffmpeg command
line to and try to decode mp4 file manually and ffmpeg gives me error for not
having h264 decoder. So I think your problem is the ffmpeg build doesn't have
relevant codec support.

I browsed opensuse repo on pkgs.org and older version of opensuse (15.2) does
have libx264 but it's removed in tumbleweed.

I also tried ffmpeg in Packman repository which is built with libx264 support.
After installing that, dolphin thumbnail just starts to work in opensuse
tumbleweed.

So I think it's just a packaging issue. 
I think libx264 is removed from opensuse due to patent, FYI:
https://en.opensuse.org/SDB:Firefox_MP4/H.264_Video_Support

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