fast forward implementation

[vijayp]

Hi,
I have writen parser and decoder plugin for WMA codec.I have implemented fast forward also,

For example,in case of "4x" ,
i will be doing decoing for one sec(0 - 1) and for remaining 3 sec(2-4) i just increased the time stamp,and i will be decoding for one second (4 -5 ) and increasing the time stamp  for 3 second (5 - 8), and goes on like this
becase of just increasing the time stamp ,i am getting delay for the skipped 3 seconds.

I want to how to skip for that three seconds without delay.

Can any one help how to do this ?

Regards,
Vijay P

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[Victor Jaquez]

On Thu, Dec 29, 2011 at 07:47:55PM +0530, vijay wrote:

> Hi,
> I have writen parser and decoder plugin for WMA codec.I have implemented
> fast forward also,
>
> For example,in case of "4x" ,
> i will be doing decoing for one sec(0 - 1) and for remaining 3 sec(2-4) i
> just increased the time stamp,and i will be decoding for one second (4 -5 )
> and increasing the time stamp  for 3 second (5 - 8), and goes on like this
> becase of just increasing the time stamp ,i am getting delay for the
> skipped 3 seconds.
>
> I want to how to skip for that three seconds without delay.
>
> Can any one help how to do this ?

I guess that's implemented using the seek event:

http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstEvent.html

http://gstreamer.freedesktop.org/data/doc/gstreamer/head/manual/html/section-eventsseek.html

vmjl

>
> Regards,
> Vijay P

> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel

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[Stefan Sauer]

On 12/29/2011 03:17 PM, vijay wrote:

Hi,
I have writen parser and decoder plugin for WMA codec.I have implemented fast forward also,

For example,in case of "4x" ,
i will be doing decoing for one sec(0 - 1) and for remaining 3 sec(2-4) i just increased the time stamp,and i will be decoding for one second (4 -5 ) and increasing the time stamp  for 3 second (5 - 8), and goes on like this
becase of just increasing the time stamp ,i am getting delay for the skipped 3 seconds.

This is not how it is been done usually. Fast forward is requested by seeking with a playback rate>1.0 and the rate is usually applied in the sink by resampling. Just skipping parts in the decoder will probably harm the A/V sync.

Stefan

I want to how to skip for that three seconds without delay.

Can any one help how to do this ?

Regards,
Vijay P

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