Improvements

[Akascape]

Hello @PaulleDemon,
I just found the correct way to seek any particular frame using pyav:

frame_num = 1000 # the frame I want
framerate = container.streams.video[0].average_rate # get the frame rate
time_base = container.streams.video[0].time_base # get the time base
sec = int(frame_num/framerate) # timestamp for that frame_num
container.seek(sec*1000000, whence='time', backward=True)  # seek to that nearest timestamp
frame = next(container.decode(video=0)) # get the next available frame
sec_frame = int(frame.pts * time_base * framerate) # get the proper key frame number of that timestamp

for _ in range(sec_frame, frame_num):
    frame = next(container.decode(video=0))
return frame

I properly implemented a new seek_frame method in tkvideoplayer, then I tested it:
Here is demo example:

out.mp4

There is no memory leaks or lags while seeking, only a little issue with cpu usage if we continuously keep on seeking frames which can be fixed by adding a time delay.

Basically the modification I did:

• added seek_frame method
• added any_frame parameter in seek method (useful for some video file)
• added new event: << FrameChanged >>
• fixed a loading issue when pyav crashes
• added pause option for seek method, in case if someone wants to seek while pause.
• other small improvements

So, should I give the pull request so that you can review it?

[PaulleDemon]

@Akascape sure you can, but I might not be able to review it until next month as I am quite packed these days.

[Akascape]

@PaulleDemon

sure you can, but I might not be able to review it until next month as I am quite packed these days.

No problem, I submitted the PR: #27