[gst-devel] Smooth rewind with Gstreamer

[Julien Moutte]

You could make your decoder output keyframe only when the segment->rate
is lower than -1.0

Julien Moutte,
FLUENDO S.A.

Daniel James Laird wrote:
> Thanks for that,
> My second question is If I want key frame only rewind using qtdemux has anyone got that working?
> 
> I have tried gst_element_seek with a rate of -2.0 with a start point of the current stream location and an end point of 0
> 
> But this does not seem to work, any ideas?
> 
> Many thanks
> Daniel Laird
> 
> -----Original Message-----
> From: Julien Moutte [mailto:julien at moutte.net] 
> Sent: 2009 Apr 21 17:27
> To: Discussion of the development of GStreamer
> Subject: Re: [gst-devel] Smooth rewind with Gstreamer
> 
> 
> 
> Hi,
> 
> Are you sure your video decoder supports reverse playback scenario ?
> 
> It will receive frames in decoding order, it should queue them
> internally and push them in reverse order when it receives an incoming
> buffer with the DISCONT flag.
> 
> Please also make sure you have a big queue behind the video decoder so
> that it can take some advance compared to the rendering element.
> 
> Julien Moutte,
> FLUENDO S.A.
> 
> Daniel James Laird wrote:
>> All,
>>
>> I am trying to get trickmodes working on my Gstreamer pipeline.
>>
>> I can use gst_element_seek and get FF working i.e I can set rate to 1,2,4,8 etc and my MP4 file plays in FF.
>> However when I put a negative number I do not get smooth RW behaviour from the qtdemux.  
>> It seems reverse playback is supported by the component.  
>>
>> Does anyone have this working and if so am I missing any steps out?  ANy help much appreciated.
>> I can seek to a specific point and can seek to a point relative to my current position but just cant get rewind to work.
>>
>> Hope you can help
>>
>> With regards,
>> Daniel Laird
>>
>>
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