Render text at certain moments with GnlComposition

[rossana]

Hello, I have a Gnlcomposition with 2 gnlfilesources (videofiles), I need to render text in a customizable manner. For instance, at certain time file1 needs text over it and file2 doesn't and viceversa or even both could need the text rendered over them.
I could put a text in the common queue, so it always appears and it isn't the needed behavior.

I appreciate any clue, thanks

Rossana


The pipeline


GnlComposition

  gnlfilesource1
                       --------------------gnlOperarion--------queue-----sink     // I put the textoverlay between the queue and the sink
  gnlfilesource2


gnlOperation   //for crossfade purposes

     alpha1
               ----------videomixer--------ffmpegcolor
     alpha2




_______________________________________________
gstreamer-devel mailing list
[hidden email]
http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel

[Thibault Saunier-2]

Hello,

Have you tried using the Gstreamer Editing Services to do that?
Transitions and text overlay are supported already:

*http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer-editing-services/html/GESTimelineTextOverlay.html
*http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer-editing-services/html/GESTimelineStandardTransition.html

I know it is not really the answer to your technical question but GES
seems to be best suited for this particular problem. Also as GES is
built upon gnonlin, you could have a look at the code to see how we
handle that.

Regards,

Thibault Saunier

On Mon, 2011-11-21 at 18:03 -0200, Rossana Guerra wrote:

> Hello, I have a Gnlcomposition with 2 gnlfilesources (videofiles), I
> need to render text in a customizable manner. For instance, at certain
> time file1 needs text over it and file2 doesn't and viceversa or even
> both could need the text rendered over them.
> I could put a text in the common queue, so it always appears and it
> isn't the needed behavior.
>
> I appreciate any clue, thanks
>
> Rossana
>
>
> The pipeline
>
>
> GnlComposition
>
>   gnlfilesource1
>
> --------------------gnlOperarion--------queue-----sink     // I put
> the textoverlay between the queue and the sink
>   gnlfilesource2
>
>
> gnlOperation   //for crossfade purposes
>
>      alpha1
>                ----------videomixer--------ffmpegcolor
>      alpha2
>
>
>
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel

_______________________________________________
gstreamer-devel mailing list
[hidden email]
http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel

[rossana]

Thanks for your response, the idea behind this is for subtitles.
I'll give a try, I am very clueles as new on this, so I couldn't get the scope of these plugins.

I'll write back with some result.

Regards

Rossana

2011/11/21 Thibault Saunier <[hidden email]>

Hello,

Have you tried using the Gstreamer Editing Services to do that?
Transitions and text overlay are supported already:

*http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer-editing-services/html/GESTimelineTextOverlay.html
*http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer-editing-services/html/GESTimelineStandardTransition.html

I know it is not really the answer to your technical question but GES
seems to be best suited for this particular problem. Also as GES is
built upon gnonlin, you could have a look at the code to see how we
handle that.

Regards,

Thibault Saunier

On Mon, 2011-11-21 at 18:03 -0200, Rossana Guerra wrote:
> Hello, I have a Gnlcomposition with 2 gnlfilesources (videofiles), I
> need to render text in a customizable manner. For instance, at certain
> time file1 needs text over it and file2 doesn't and viceversa or even
> both could need the text rendered over them.
> I could put a text in the common queue, so it always appears and it
> isn't the needed behavior.
>
> I appreciate any clue, thanks
>
> Rossana
>
>
> The pipeline
>
>
> GnlComposition
>
>   gnlfilesource1
>
> --------------------gnlOperarion--------queue-----sink     // I put
> the textoverlay between the queue and the sink
>   gnlfilesource2
>
>
> gnlOperation   //for crossfade purposes
>
>      alpha1
>                ----------videomixer--------ffmpegcolor
>      alpha2
>
>
>

> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel


_______________________________________________
gstreamer-devel mailing list
[hidden email]
http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel

_______________________________________________
gstreamer-devel mailing list
[hidden email]
http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel

[Thibault Saunier-2]

Hello,

> Thanks for your response, the idea behind this is for subtitles.
> I'll give a try, I am very clueles as new on this, so I couldn't get
> the scope of these plugins.
>
> I'll write back with some result.

Could you explain what you want to do exactly because if you just want
to play a video with subtitles, there is no need to use gnonlin, and you
should look at playbin2 that handles everything for you.

Regards,

Thibault Saunier

_______________________________________________
gstreamer-devel mailing list
[hidden email]
http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel

[rossana]

hello, this is my scenario, I need a player with crossfade, for this I use a Gnlcomposition. I didn't find out another way to do this, the playbin2 solution wasn't the best solution for this purpose.

Besides I need to blend text/png/jpeg/subtitles/clock over the video stream according the playlist configuration (The playlist has this information, time to blend a peg, if the video has subtitles or a clock, etcj).

The subtitles go with certain videos not all of them. In the same way, the clock.
The png/jpeg has moments in the timeline to be render, they don't blend all the time over one video.

I hope you understand the problem I need to solve.

Thanks for your interest.

Rossana

2011/11/22 Thibault Saunier <[hidden email]>

Hello,

> Thanks for your response, the idea behind this is for subtitles.
> I'll give a try, I am very clueles as new on this, so I couldn't get
> the scope of these plugins.
>
> I'll write back with some result.

Could you explain what you want to do exactly because if you just want
to play a video with subtitles, there is no need to use gnonlin, and you
should look at playbin2 that handles everything for you.

Regards,

Thibault Saunier

_______________________________________________
gstreamer-devel mailing list
[hidden email]
http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel

_______________________________________________
gstreamer-devel mailing list
[hidden email]
http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel