Feeding raw audio data into a GES timeline

[Thibault Saunier]

Hi,

Your approach sounds about right, although. I guess the issues are related
to assets, could you paste the assertions you get/a piece of code to
reproduce?

- Thibault


Le ven. 19 févr. 2021 à 15:32, Daniel Bailey <danieljabailey at gmail.com> a
écrit :

> Hi,
> I am working on an audio synthesis tool, which allows the user to generate
> audio to play over the top of a sequence of videos.
> I'm writing this in python.
> I am using GES to create a simple video sequence editor.
> The application needs to be able to play the synthesised audio in sync
> with the video.
>
> I have written a simple proof of concept subclass of GstApp.AppSrc which
> can do some simple audio synthesis, and feed it into a GStreamer pipeline.
> This works fine for me if I just connect it up to an autoaudiosink without
> using any GES stuff.
>
> Is there a way to get this gstreamer element to be part of the GES
> timeline?
>
> I tried to do this using the following method:
>
> Create a Subclass of GES.SourceClip
> Implement do_create_track_element on this subclass
> do_create_track_element instantiates a custom subclass of GES.AudioSource
> the subclass of AudioSource overrides do_create_source and returns a
> pipeline that wraps my custom AppSrc.
> call layer.add_clip on a layer in a GES timeline to add one of these
> custom clips
>
> This method does not work, I see various assertion errors when I try this.
>
> Is this the right approach? Am I doing roughly the right thing? Or is
> there a totally different way to achieve what I want?
> If this is roughly the right idea then where am I going wrong?
>
> Thanks.
> Dan.
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