Help - Using GStreamer decoders to decode

Ashwini Sharma ak.ashwini at gmail.com
Tue Jun 28 00:18:56 PDT 2011


Hi Bernhard,
  I will be using appsrc element to push buffers, appsink element to grab
the decoded frame and my decoder will be ffdec_mpeg2video

-Ashwini

On Tue, Jun 28, 2011 at 12:45 PM, Bernhard Graaf <bernhard.graaf at gmx.de>wrote:

> **
>
> Hi Ashwini,****
>
> ** **
>
> Do you have more details about what appsrc, decoder and appsink you want to
> use? It’s a little bit different.****
>
> ** **
>
> Bernhard****
>
> ** **
>  ------------------------------
>
> *Von:* gstreamer-devel-bounces+bernhard.graaf=gmx.de at lists.freedesktop.org[mailto:
> gstreamer-devel-bounces+bernhard.graaf=gmx.de at lists.freedesktop.org] *Im
> Auftrag von *Ashwini Sharma
> *Gesendet:* Dienstag, 28. Juni 2011 07:49
> *An:* **Discussion of the development of and with GStreamer**
> *Betreff:* Help - Using GStreamer decoders to decode****
>
> ** **
>
> Hi All,****
>
>  ****
>
>   I am writing an mediaplay application in which i have to use GStreamer
> decoders to decode data and send it back. For the purpose I am going to use
> *"appsrc ! decoder ! appsink" *. Where decoder can be a specific decoder
> or decodebin. ****
>
>  ****
>
> I will be reading the file, demuxing it and then send the demuxed packet to
> GStreamer decoder part as described above. Here I want to know few
> things....****
>
>  ****
>
>    1. Does the  decoder in gstreamer output a complete Frame or is it
>    partial data? I assume it to be a complete frame... please correct my
>    assumption.****
>    2. Can I know from the output buffer/frame (at src pad of decoder),
>    whether it is a Key-frame or not?****
>    3. Is it possible to check whether the complete frame can be
>    generated from the given demuxed data or does it require more?****
>    4. Is there any way to get the PTS of the decoded frame?****
>
>  Please help, as this is urgent for me. ****
>
>  ****
>
> Thanks,****
>
> Ashwini****
>
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