How long is the "long duration"?
On Jul 22, 11:08 am, Andy Quan <androidr...@gmail.com> wrote:
> Hi all & esp. PV engineers,
> I am working on a hard bug found during long duration video playback by
> OpenCORE v1.0 and it hangs mediaserver.
>
> I find an extremely old email talking about bugs related to long duration
> avsync playback of opencore by Dave Sparks. It seems to be about OpenCORE
> v1.0. I'd like to know the details about this bug, e.g. description and root
> cause and workarounds? Thanks.
>
> Please refer to the following statements by Dave Sparks. Thanks.
> On Thu, Feb 26, 2009 at 4:02 PM, Dave Sparks <davidspa...@android.com>wrote:
>
>
>
> > The audio MIO counts the number of audio samples output to the audio
> > sink and divides by the frame rate. This value is adjusted by the
> > latency reported by the audio sink (which ultimately comes from the
> > audio HAL plus the latency in the software mixer engine). For some
> > reason with OpenCore 1.0, we could never reconcile the real hardware
> > latency with the presentation of video frames in the MIO, so we had to
> > add a fudge factor. We are hoping that OpenCore 2.0's new media
> > playback clock will resolve this issue.
>
> > I think there is an outstanding bug related to the playback clock and
> > long streams, but I seem to recall that was 5 hours. For most mobile
> > devices, the battery is going to die long before that if the DSP and
> > backlight are powered up the entire time.
> > --
> > Thanks,
> > Andy
>
>
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