In_bytes = (nbytes) # Read raw image bytes from stdout pipe. Thread = threading.Thread(target=writer, args=(proc.stdin,)) '-vcodec', 'rawvideo', # Select rawvideo codec Sp.run(shlex.split(f'ffmpeg -y -f lavfi -i testsrc=size=128x128:rate=1:duration=30 -f image2 tmp%02d.gif')) # Build 30 synthetic images tmp01.gif, tmp02.gif. # Write 30 images to stdin pipe (for example)

Here is a code sample (not using BytesIO): import numpy as np The advantage of RAW images is that the size in bytes of all the images is known form advance. I changed the code to pass images in RAW format. I tried to pass PNG images, but it was too messy.

Instead of grabbing all the images to the RAM, and pass the image to FFmpeg, you better use a writer thread and a for loop. In case there are multiple images, you can use municate only if all the images are in the RAM. Proc = sp.Popen(cmd, stdout=sp.PIPE, stdin=sp.PIPE) Sp.run(shlex.split(f'ffmpeg -y -f lavfi -i testsrc=size=128x128:rate=1:duration=1 tmp.gif')) # Build synthetic image tmp.gif for testing Here is the code sample: import subprocess as sp The code sample starts by building synthetic GIF image file for testing. I removed stderr=SP.PIPE, because I wonted to see the FFmpeg log in the console.You don't need to set bufsize unless you know that the default is too small.I replaced '-' with 'pipe:' (I think it's more clear).I made few changes to your code, to make it more elegant (I think): You may simplify the code, for working with images. It looks like you are missing proc.wait() at the end and that's it.įor multiple images, you may take a look at my post here. For a single image your code is working fine.

Ffmpeg python linux image2pipe