Question

I’m using Python 2.7, PyGTK 2.24, and PyGST (Gstreamer).

To ensure smooth playback from one clip to another (without a blink), I combined all the clips I needed into one larger video. This lets me seek to the exact place I need in code. One of the clips is like a “fill-in”, which should loop whenever one of the other clips is not playing.

However, to make my code easier and more streamlined, I want to use segments to define the various clips within the larger video. Then, at the end of each segment (I know there is a segment end event), I seek to the fill-in clip. When I need another clip, I just seek to that segment.

My question is, how exactly do I create these segments? I’m guessing that would be the event_new_new_segment(), but I am not sure. Can I create multiple clips to seek with using this function? Is there another I should use. Are there any gotchas to this method of seeking in my video that I should be aware of?

Second, how do I seek to that segement?

Thank you!

Answer 1

Looks like only GstElement‘s can generate NEWSEGMENT events, you can’t simply attach it to an existing element. The closest thing you could do if not using Python, would be creating a single shot or periodic GstClockID or and use gst_clock_id_wait_async until the clock time hit. But the problem is, GstClockID is not wrapped in PyGst.

I think I’m actually working on some similar problem. Some kind of solution I’m using now, is gluing video streams in real time with gnonlin. The good side: seems to work, didn’t have time to thoroughly test it yet. Bad side: poorly documented and buggy. These sources from the flumotion project (and the comments inside!) were very, very helpful to me for understanding how to make the whole thing work.