drawbox should support time

[Puneet Agarwal]

Its a feature request.

I request to take this project in GSOC 2020, as I can mentor this project very well. I am using ffmpeg for my own website from very long. FFmpeg has helped me in lot of ways, and I think its time to give back something to the community.

[Elon Musk]

drawbox already supports time.

[Gyan]

OP isn't clear - do you mean timeline support (enable) or animation? It has the former, not the latter. If the latter, I've a semi-finished patch for it which I can finish next month. It's not ambitious enough for a GSoC project.

[Elon Musk]

drawbox supports commands so adding AVExpr mess is not welcomed.

[Gyan]

Commands only allow reinit to a new static size, not animation.

[Elon Musk]

Nonsense, commands can do animation just fine. While AVExpr is stupid limited nonsense.

[Puneet Agarwal]

I will tell you what I want to do, and let me know if it possible using simple commands.

Sample Video:- ​https://automated-videos.s3.ap-south-1.amazonaws.com/v8J5QCcs.mp4

In this video white box is coming up from bottom, with increase in time. Now in order to that, I have added multiple drawbox in loop with enable condition.

What is the best way to do this??

I can see that drawtext supports t, then why does drawbox does not support that.

I don't know about the internals of ffmpeg that how it works, but by looking it into a simpler way as abstraction, it should work.

[Elon Musk]

drawbox supports commands use sendcmd filters.

[Puneet Agarwal]

Replying to richardpl:

drawbox supports commands use sendcmd filters.

If you don't mind, can you elaborate a bit.

[Elon Musk]

Please consult documentation, see sendcmd filter documentation, and how it is used with other filters. You can even use zmq filters to alter options via commands at runtime.