Myth uses a version of https://ffmpeg.org
for video processing. avformatdecoder is part of that project.
Myth modifies its version slightly but it is runnable as mythffmpeg with the standard ffmpeg arguments. That is basically what mythpreviewgen does.
I suspect you'll see the same crash if you run
- Code: Select all
mythffmpeg -i <problem file> -ss 5 -vframes 1 out.png
Google reports several ffmpeg 'alignment exception' crashes with ARM/RPi.
I suggest you repeat the test on the latest (or development) ffmpeg.
If you can find a version that doesn't crash, or better still an ffmpeg issue/patch that fixes the problem, then please raise a ticket on https://code.mythtv.org/trac
with all the versions/references.
However, AFAIK no other RPi user has mentioned the issue
There are some RPi builds available somewhere. They may have a work-around already.