6.0.0 video thumbnailer...

[Gilles Caulier]

No, i use last stable QtAv 1.12.0 from Mageia6...

Gilles

2018-03-06 21:20 GMT+01:00 Maik Qualmann <metzpinguin at gmail.com>:

> Gilles,
>
> do you use QtAV from the git/master? If so, it may be due to a new signal
> in
> the video frame extractor compared to version 1.12. I could fix that.
>
> Maik
>
> Am Sonntag, 4. März 2018, 23:00:17 CET schrieb Gilles Caulier:
> > And this line :
> > https://cgit.kde.org/ffmpegthumbs.git/tree/CMakeLists.txt#n16
> >
> > Gilles
> >
> > 2018-03-04 22:58 GMT+01:00 Gilles Caulier <caulier.gilles at gmail.com>:
> > > 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/lib
> > >> ffmpegthumbnailer
> > >>
> > >> 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
>
>
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.kde.org/pipermail/digikam-devel/attachments/20180306/6a323d06/attachment.html>