Video metadata using non-UTF8 encoding causes crash

[transplier]

test.zip
Sigal crashes if a video has non-UTF8 text metadata present. I attach a sample file, which has a non-UTF8 string in the handler_name MP4 metadata attribute. This causes a problem as Sigal runs ffmpeg -i on the video, then attempts to interpret the output as UTF8. Since ffmpeg -i also dumps out metadata, this fails.

This is the site of the crash:

sigal/sigal/video.py

Line 66 in b265929

stderr = res.stderr.decode('utf8')

I suspect telling Python to ignore invalid UTF8 sequences will be enough to fulfill the code's purpose:

stderr = res.stderr.decode('utf8', 'ignore')

With the above change, my gallery builds fine. I'm unsure what broader behavior Sigal exhibits with non-UTF8 text, as none of the metadata I have ends up in the generated HTML.

[transplier]

Also, a heartfelt thanks for this software. I used it to build a stable archive of family memories, spanning nearly a full century. I care a lot about the long-term durability of this archive, and a static site that can be hosted anywhere (or just kept as files) and browsed on almost anything is just the thing for it!

[saimn]

Thanks ! :)
I commited the fix you suggested.