[mythtv-users] While watching a show in Time Stretch, audio lags behind

Jean-Yves Avenard jyavenard at gmail.com
Fri Aug 22 10:41:16 UTC 2014


On 22 August 2014 11:07, Mike's JdJ <stepsisters at comcast.net> wrote:
>
> While watching a show with a Time Stretch of 2.0, audio starts lagging
> behind the video until unwatchable.

what do you use for video decoding ?

When using VDPAU, the hardware decoder can only decode, depending on
the codec, only about real time.
It can't decode much faster. Certainly not 2x as fast.

Time Stretch then can be an issue (a codec like h264 requires you to
decode all frames between a reference frame to get a single picture)

When that happens, you will see in the log errors about video frames
being dropped

I wouldn't rely too much on the A/V Sync value... is it in sync, or else?

what do you mean by unwatchable? too many frames are dropped, the A/V
sync is no good (like audio is too far forward/behind)...


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