[theora] Theora player for Nokia Series 60

Gregory Maxwell gmaxwell at gmail.com
Fri Apr 16 21:41:45 PDT 2010

On Sat, Apr 17, 2010 at 12:30 AM, Nik Lam <nlf482n at med.usyd.edu.au> wrote:
> Quoting "Stuart Fisher" <stuart.fisher at fig7.com>:
>> If you want to see some results (displayed frames and dropped frames),
>> intall this.
>> http://symbianoggplay.sourceforge.net/OgvPlay/OgvPlayLog.zip
>> OgvPlay log data will appear in C:\Data\GCCLog.txt
> Here are my results for OgvPlay alpha 22 ARM 11 on the Nokia E71.
> Big Buck Bunny:
> Decoded file: E:\Ogv\BBB-320x180.ogv
> 7349 frames displayed
> 6775 dropped frames (2)
> Elephant's Dream:
> Decoded file: E:\Ogv\ED-320x180.ogv
> 7956 frames displayed
> 7328 dropped frames (2)
> Despite almost half the frames being dropped, the videos are very
> watchable. Jerkiness is really only noticeable when there's smooth &
> slow movement across large parts of the screen, for instance when
> credits are rolling or when panning across a landscape of zooming in.
> That said, there is a sample clip that came on the phone which I'm
> guessing is encoded using H264, and it's not perfect either (played in
> the Real Player that comes with the phone).

I can only assume that 'dropped' here means yuv2rgb and output
skipped... theora itself desyncs if you skip decoding frames.

If this is output bound then there may be hope for better performance
by better use of the display drivers.

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