Thanks.

On Mon, Dec 29, 2008 at 8:55 AM, Eric Zhang <nicolas.m.zhang@gmail.com> wrote:
Hi, gstreamer-devel:

    OK. I think you can read the source code of decodebin for reference. Decodebin add a "typefind" element in it and "typefind" will tell it what the caps of the source media; Then, "find_compatibles" search in the element registry and find out elements which are compatible with this caps; At last, "try_to_link_1" loop through the elements which "find_compatibles" found and try to link it with source.

    So, I think if you read the source codes of "gst_decode_bin_init", "find_compatibles" and "try_to_link_1", you can figure out the way which makes your work done. You can find these 3 functions in gstdecodebin.c.

Eric Zhang

2008/12/26 Jyoti D <jyoti.d@allaboutif.com>

Thanks for the response Eric.
Basically I want my application to act as an RTSP server. So I need to stream the media file contents as rtp packets. For this I encode the given stream into its native format, for eg. if my media file is of type Mpeg4 then I want to encode it into Mpeg4 and then use the compatible RTP payloader element and stream it over the server.

The client may be a VLC player which should play media file.

So for this I need to dynamically find encoder and rtppayloader to stream media content of file on the server. I need help to dynamically link the compatible encoder and rtppayloader.

Thanks,
Jyoti

 

On Thu, Dec 25, 2008 at 3:03 PM, Eric Zhang <nicolas.m.zhang@gmail.com> wrote:
Hi, gstreamer-devel:

    1. Consider "decodebin" for demux & decode your media file automatically.

    2. You mentioned "encode this file into a perticular format", so why you wanna find encoder & rtppayloader dynamically ? You should link your specified encoder to decodebin then link rtppayloader, that's all.

Eric Zhang

2008/12/24 Jyoti D <jyoti.d@allaboutif.com>
Hi all,

I am writing an application where I need to do the following:
1. read a media file from the disk
2. encode this file into a particular format
3. use the rtp payloaders to send the data on to the server

To my understanding to use an encode I need to demux and then decode the file data
to a raw format and then encode this data using the encoder and then payload the same using rtp payloaders.

Now I want to find the encoder dynamically and link with the decoder.
Similarly I also need to dynamically link the rtp payloaders.

But I am not able to do it. Could anyone help me regarding the same.

Thanks,
Jyoti

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