[vlc-devel] Severe A/V asynchronous with hardware acceleration on android

ScottLin scottlin at condel-tech.com
Tue May 8 03:24:58 CEST 2012

2012/5/8 Rémi Denis-Courmont <remi at remlab.net>

> Le vendredi 4 mai 2012 11:08:52 ScottLin, vous avez écrit :
> > But when I turn on the hardware acceleration, I see severe audio and
> video
> > asynchronous for the same HD file.
> > Even for a SD file, there is still a slight a/v async.
> Neither the Android OpenSLES output in the official VLC tree, nor the
> Android
> "audio track" output in the Android port tree, perform any attempt at play
> time synchronization.
> Thus, it is pure luck if lips appear synchronized on Android in any case.
Do you mean that the a/v sync in SW mode is just luck?
I see decoder_synchro.c is for frame drop.
And (p)ts in decoder.c is for synchronization.
Don't them apply for Android port?
I am confused. Or I misunderstand them.
Would you kindly explain a bit more?

Thank you!

Best regards,

> --
> Rémi Denis-Courmont
> http://www.remlab.net/
> http://fi.linkedin.com/in/remidenis
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