[Server-devel] problem with media player module on XS- moodle

[James Cameron]

On Tue, Jun 07, 2011 at 09:06:20AM +0300, ELGEBERI, Omar wrote:
> We were working on adding the media player module to the XS-Moodle,
> everything worked fine, but the problem is that when we play the video
> file on the XO-1 the video is slow and the voice stops for very little
> amounts of time during the playback.
> 
> We used all types of supported formats for the video like ogg, flv,
> avi, mp4 and mpeg, but the problem is the same.
> 
> We tried other browsers n the XO, like Firefox and AguBrowser, and we
> are still facing the same problem.
> 
> Please inform us with any information that could help us solve this
> problem.

This is unlikely to be an XS or Moodle problem, and more likely to be an
XO-1 video decoding and video bandwidth problem ... so you might
subscribe to devel at lists.laptop.org and post there asking for advice.  I
say that because server-devel@ mailing list seems to concentrate on XS
problems, and there was no other useful response last time you posted
the question.

Information that may help others to help you:

1.  quantify how long the voice stops,

2.  quantify how slow the video is,

3.  provide versions of software components on the XO-1, such as the
operating system build, the kernel, and Firefox, ... if this is the same
problem you posted about on 30th May, then based on your reply on 1st
June the operating system is based on Fedora 11, with Sugar 0.84.32,
which sounds near enough to OLPC OS 10.1.3 build os860 to be easily
reproduced,

4.  describe whether Sugar or GNOME desktop are being used,

5.  describe the frame rate and resolution of the video content, since
these determine the CPU and video bandwidth requirements,

6.  provide a sample video file for download that demonstrates the
problem,

7.  test what CPU utilisation is observed, using top over SSH,

8.  verify that all other activities and applications are stopped, so as
to minimise background CPU utilisation,

9.  see if disabling power management has any impact on video
performance.

If you can provide a sample video file for download [6] then I can test
it on XO-1 with OLPC OS 10.1.3 to at least confirm your diagnosis, and
check the file for unusual resolution or frame rate [5].

-- 
James Cameron
http://quozl.linux.org.au/