How does an element work in pull mode ?

[Irfan Shaikh-2]

Hi,
          Consider the following pipline,  I think the elements in the
following pipeline works in Push mode

          gst-launch filesrc location=/home/h264.dat ! video/x-h264,
width=1280, height=720, framerate=30/1 ! ffmux_asf ! filesink
location=/home/h264.asf

          What changes we have to do to make these element in pull mode ??


Regards,







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[michael smith-6-3]

On Wed, Jan 21, 2009 at 6:56 AM, irfanshaikh
<[hidden email]> wrote:
> Hi,
>          Consider the following pipline,  I think the elements in the
> following pipeline works in Push mode
>
>          gst-launch filesrc location=/home/h264.dat ! video/x-h264,
> width=1280, height=720, framerate=30/1 ! ffmux_asf ! filesink
> location=/home/h264.asf
>
>          What changes we have to do to make these element in pull mode ??

We very strongly recommend against use ffmux_*; they mostly don't
work, and we can't help you with them.

Which element do you want to run in pull mode? Presumably the muxer:
you'd have to rewrite the muxer to run in pull mode. But it still
won't work, since you don't have an h264 parser in your pipeline.
Maybe you wanted to add a parser, then run THAT in pull mode? Either
way: if it doesn't already support pull mode, you'd need to add that
functionality to the source.

Mike

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[Irfan Shaikh-2]

Hi,

    Thanks for your reply !!!
    I have modified the pipeline with the h264parse element.

      gst-launch filesrc location=/home/h264.dat ! h264parse ! video/x-h264,
 width=1280, height=720, framerate=30/1 ! ffmux_asf ! filesink
 location=/home/h264.asf

    Is it ok if the h264parse work in pull mode and ffmux_asf work in push
mode in the pipeline ?? Please tell me how do i make h264parse to work in
pull mode ?
    If you suggest me how to make an element to work in pull mode. I can try
the rest of elements in the pipeline to work in pull mode(also ffmux_asf).
    Any small Hint would be helpful !!

    Thanks in advance !!!!

regards,

-----Original Message-----
From: [hidden email] [mailto:[hidden email]]On Behalf Of Michael
Smith
Sent: Wednesday, January 21, 2009 11:34 PM
To: [hidden email]; Discussion of the development of
GStreamer
Subject: Re: [gst-devel] How does an element work in pull mode ?


On Wed, Jan 21, 2009 at 6:56 AM, irfanshaikh
<[hidden email]> wrote:
> Hi,
>          Consider the following pipline,  I think the elements in the
> following pipeline works in Push mode
>
>          gst-launch filesrc location=/home/h264.dat ! video/x-h264,
> width=1280, height=720, framerate=30/1 ! ffmux_asf ! filesink
> location=/home/h264.asf
>
>          What changes we have to do to make these element in pull mode ??

We very strongly recommend against use ffmux_*; they mostly don't
work, and we can't help you with them.

Which element do you want to run in pull mode? Presumably the muxer:
you'd have to rewrite the muxer to run in pull mode. But it still
won't work, since you don't have an h264 parser in your pipeline.
Maybe you wanted to add a parser, then run THAT in pull mode? Either
way: if it doesn't already support pull mode, you'd need to add that
functionality to the source.

Mike


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