[ogg-dev] [theora] XiphQT pre-release builds

Silvia Pfeiffer silviapfeiffer1 at gmail.com
Sun Jun 14 17:47:22 PDT 2009

Your release fixed it - I am now watching Ogg Theora/Vorbis in
QuickTime in sync. Awesome! Congrats on the release, too!!

On Tue, Jun 9, 2009 at 6:23 PM, Arek Korbik<arkadini at gmail.com> wrote:
> Hi,
> On Mon, Jun 8, 2009 at 4:28 PM, Silvia
> Pfeiffer<silviapfeiffer1 at gmail.com> wrote:
>> I just created another Ogg export from iMovie and it now plays in
>> QuickTime. Maybe there were some strange things still in memory or so
>> - I have since restarted my computer.
>> The playback in QuickTime however has some artifacts that vlc does not expose:
>> * a/v are out of sync
>> * there are green lines and a few red ones at the top and the bottom
>> of the picture
>> * there are sometimes artifacts from pervious pictures, such as a
>> remaining white spot
>> * overall the decode quality is pretty poor in comparison to vlc
>> I do wonder what creates these issues.
> There was an, umm, ekhm, fixed buffer of 64kB in the TheoraDecoder and
> buffer resizing wasn't implemented... So, if an encoded frame was
> larger than the buffer it would skip it without decoding. I believe
> you experienced the effects of that.
> I fixed that and increased some values that could be responsible for
> the a/v desync in HD content, although that issue I couldn't reproduce
> myself. I would be great if you could test the new version and see if
> the a/v stays in sync.
>>> Following suggestions, I guess I should make 3 sets of binaries for the release:
>>>  - built with the latest stable releases of the Xiph libs (would be
>>> the default download option),
>>>  - built with HEADs of the trunks of the libs (what I used to do),
>>>  - built with HEADs + Thusnelda
>> I also think the first and the last would be good enough.
> Definitely yes. I've built a new set of binaries (those are actually
> 0.1.9rc1 now):
> http://people.xiph.org/~arek/
> 0.1.9 shapes up to be a proper release with non-empty changelog, after
> all. But let's see if we can find even more smallish issues that will
> be possible to fix quickly before final 0.1.9! :)
> Thanks a lot,
> Arek

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