Asyncio support async/await

[akolpakov]

Now I'm working on Asynchronous application. And using asyncio library which is built in python3. And uses async/await syntax.

Good to have possibility to return ffmpeg process as a coroutine and use it in a asyncio way.

For example:

process = await (
    ffmpeg
    .input('input.mp4')
    .output('pipe:', format='rawvideo', pix_fmt='rgb24')['v']
    .run_asyncio(pipe_stdout=True, quiet=False)
)

while True:
    frame_bytes = await process.stdout.read(video_frame_size)
    if len(frame_bytes) == 0:
        break

await process.wait()

It would be very handy for asynchronous applications.

[Marcnuth]

+1

[frenchja]

@akolpakov Shouldn't it be possible to run the output of https://kkroening.github.io/ffmpeg-python/#ffmpeg.compile via an awaited https://docs.python.org/3/library/asyncio-subprocess.html#asyncio.create_subprocess_exec with minimal code changes in the meantime?

[zaemyung]

FYI, this supports aysncio : https://github.com/jonghwanhyeon/python-ffmpeg

[fedej]

@akolpakov Shouldn't it be possible to run the output of https://kkroening.github.io/ffmpeg-python/#ffmpeg.compile via an awaited https://docs.python.org/3/library/asyncio-subprocess.html#asyncio.create_subprocess_exec with minimal code changes in the meantime?

I've being using something like that and it's been working fine. Although I just have a single use case, so it's not exhaustively tested. https://gist.github.com/fedej/7f848d20205efbff4db4a0fc78eae7ba