6.0.0 video thumbnailer...

[Maik Qualmann]

Gilles,

libffmpegthumbnailer has no KIO dependencies, only C and FFMpeg. Or I do not 
look right? Does the package exist in your Linux distribution?

https://github.com/dirkvdb/ffmpegthumbnailer/tree/master/libffmpegthumbnailer

Maik

Am Sonntag, 4. März 2018, 18:56:48 CET schrieb Gilles Caulier:
> Another one : https://bugs.kde.org/show_bug.cgi?id=387892
> 
> not reproducible here, but with FFMPEG, this will kill the bug...
> 
> Gilles
> 
> 2018-03-04 18:55 GMT+01:00 Gilles Caulier <caulier.gilles at gmail.com>:
> > For me this entry is valid :
> > 
> > https://bugs.kde.org/show_bug.cgi?id=390443
> > 
> > and we can try to close this file if we use FFMPEG directly to generate
> > thumbnailer...
> > 
> > Gilles
> > 
> > 2018-03-04 17:49 GMT+01:00 Gilles Caulier <caulier.gilles at gmail.com>:
> >> Hi all,
> >> 
> >> Since i written the FFMPEG video metadata parser in 6.0.0 branch, i'm
> >> trying to register a huge video collection from my host computer.
> >> 
> >> Here, more than 2500 MKV files are present, plus a lots of MP4, MOV, and
> >> another media taken with cellular and camera.
> >> 
> >> The registration have been very fast. 2500 file parsed in 2 minutes and
> >> ready to use. System has SSD, Sqlite, 8 cores, and 32Gb of RAM. No crash
> >> all work fine... excepted... the video thumbnails.
> >> 
> >> I facing random dysfunctions with video files. Sometime thumbs are there,
> >> sometime not. Using F5 always give a different results until i try to
> >> insist and i can see the DB locked and revival...
> >> 
> >> The video thumbnailer is based on QtAV frame extractor. My QtAV is last
> >> stable 1.12.0. I suspect a bug somewhere in QtAV, as i can see
> >> thumbnailer
> >> code including a lots of mutex to prevent concurrency.
> >> 
> >> This is typically abnormal. FFMPEG API is re-entrant as i checked with
> >> the multi-threaded metadata parser unit test.
> >> 
> >> As we depend now directly of FFMPEG API, I propose to rewrite the video
> >> thumbnailer with libav C function.
> >> 
> >> We have code ready to use with ffmpeg API here :
> >> 
> >> https://cgit.kde.org/ffmpegthumbs.git/tree/
> >> 
> >> Your viewpoint ?
> >> 
> >> Gilles