Possible v4l2src regression bug with consecutive recordings

[Alfonso Rodriguez]

Bug filed:
https://bugzilla.gnome.org/show_bug.cgi?id=772521

Regards :)


*Alfonso Rodríguez PereiraTELTEK Video Research*
http://teltek.es/


2016-10-06 18:04 GMT+02:00 Nicolas Dufresne <nicolas.dufresne at gmail.com>:

> Please, file this in bugs.gnome.org:
>
> https://bugzilla.gnome.org/enter_bug.cgi?product=GStreamer
>
>
> Le jeudi 06 octobre 2016 à 16:42 +0200, Alfonso Rodriguez a écrit :
> > Hello everyone,
> >
> > We are using GStreamer to record video on our opensource software
> > called Galicaster, and we had an issue when starting several
> > recordings in fast succession. We narrowed it down to the GStreamer
> > pipeline in C, and we discovered what seems to be an issue with the
> > gstv4l2allocator when a recording closes. When this issue happens,
> > the device is 'busy' for the next pipeline.
> >
> > The script we used for testing is the following:
> > http://paste.ubuntu.com/23284568/
> >
> > It executes a simple pipeline over and over using the same device
> > until it fails.
> >
> > We executed the script with GST_DEBUG=3 and we got the following
> > error (full output in http://paste.ubuntu.com/23284592/):
> > 0:00:27.492185197 11963      0x25bc830 ERROR          v4l2allocator
> > gstv4l2allocator.c:1245:gst_v4l2_allocator_qbuf:<gc-v4l2-
> > src:pool:src:allocator> failed queueing buffer 1: Invalid argument
> > 0:00:27.492207147 11963      0x25bc830 ERROR         v4l2bufferpool
> > gstv4l2bufferpool.c:1127:gst_v4l2_buffer_pool_qbuf:<gc-v4l2-
> > src:pool:src> could not queue a buffer 1
> >
> > This was reproduced on an Ubuntu 16.04.1 machine with GStreamer
> > version 1.8.2 using the Logitech HD Webcam C910 and the HD Pro Webcam
> > C920. We could also reproduce this behaviour with lower quality
> > Logitech cameras, but it would take longer to reproduce. It seems
> > that the chance to reproduce the issue is proportional to the video
> > bandwidth.
> >
> > We think it's a regression bug, because we were not able to reproduce
> > said behavior on the GStreamer 0.10 and 1.2 versions.
> >
> > I attached a gist with more information about the tests we did:
> > https://gist.github.com/Alfro/d94deab6b5b5314f2cee8167019c7239
> >
> > Should we create a bug in bugzilla with this information? Does anyone
> > have a similar experience?
> >
> > Regards,
> >
> > Alfonso Rodríguez Pereira
> > TELTEK Video Research
> > http://teltek.es/
> > _______________________________________________
> > gstreamer-devel mailing list
> > gstreamer-devel at lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
> _______________________________________________
> gstreamer-devel mailing list
> gstreamer-devel at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/gstreamer-devel/attachments/20161006/92ff8cf4/attachment.html>