[gst-devel] av sync issue with hardware decoder

[Wim Taymans]

On Sun, 2007-08-12 at 23:13 -0400, pritesh wrote:

Most decoders just copy the timestamps from qtdemux, that should work
fine.

If you have special buffers (with fake data) you might want to define a
specific caps for them so that they not accidentally autoplug to the
wrong elements. something like application/x-dsp-video or so.

Wim

> ok , i will check on videosink part , but what about timestamp and
> duration of video buffers 
> 
> right now i am using timestamp and duration given by qtdemux 
> 
> 
> since the decoded data is already in frame buffer , i am just passing
> fake gstbuffer with timestamp , duration, and caps but with some fake
> data 
> 
> 
> does the timestamp or duration neeeds to be adjusted according to
> decoder speed (fps), which is quite fast 
> 
> 
> 
> 
> 
> --- On Sun 08/12, Wim Taymans < wim.taymans at gmail.com > wrote:
> 
>         From: Wim Taymans [mailto: wim.taymans at gmail.com]
>         To: digitaldsp at excite.com
>         Cc: gstreamer-devel at lists.sourceforge.net
>         Date: Sun, 12 Aug 2007 17:17:00 +0200
>         Subject: Re: [gst-devel] av sync issue with hardware decoder
>         
>         
>         On Sun, 2007-08-12 at 11:06 -0400, pritesh wrote:
>         
>         Are you subclassing the videosink from GstVideoSink? if you do
>         this and
>         timestamp the video buffers correctly all should work fine.
>         
>         Wim
>         
>         
>         > hi all,
>         > on arm board i have a hardware h264 decoder . which has
>         exposed
>         > decode , postprocess , display api
>         > 
>         > 
>         > but in my hardware decoder plugin i am only calling decode
>         api 
>         > 
>         > in the videosink plugin i call the postprocess and display
>         api for av
>         > sync
>         > 
>         > 
>         > but the thing is during video playback , video is leading
>         (much
>         > faster) audio and av sync is not there.
>         > 
>         > i am using the timestamp and duration generated by parser . 
>         > 
>         > do i have to adjust this timestamp and duration of buffer
>         passed to
>         > videosink , according to decoder speed.(fps)
>         > 
>         > 
>         > 
>         > 
>         > any ideas 
>         > 
>         > 
>         > 
>         > 
>         > 
>         > 
>         > 
>         > 
>         > 
>         > 
>         > 
>         >
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