GSTBuffer offset contains -1 in 1.0.6

[Steffen.Roeber at hella.com]

It seems occur if I use gst-libav (filesrc, decodebin, appsink). I get 
same behaviour in all my sample movies.

Hi Steffen,

> In 0.10.x I used the GstBuffer::offset member to retrieve the current
> frame number. This field is always -1 now. So how to get the frame
> index? 

Some more context would be nice.

Whether this is set or not depends a lot on the demuxer/parsers/decoder
involved, and possibly also on the file and how it's accessed. (Also in
0.10 btw). It's rarely reliable even when set.

 Cheers
  -Tim

Hella Aglaia Mobile Vision GmbH
Steffen Roeber
Firmware & Tools
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