6.0.0 video thumbnailer...

[Gilles Caulier]

Look this line :

https://cgit.kde.org/ffmpegthumbs.git/tree/ffmpegthumbnailer.h#n21

Gilles

2018-03-04 19:27 GMT+01:00 Maik Qualmann <metzpinguin at gmail.com>:

> 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
>
>
>
>
>
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