Skip to content

@mikeboers /results.txt
Last active

Embed URL


Subversion checkout URL

You can clone with
Download ZIP
Comparing speed of reading video frames via a subprocess, or via PyAV
2013-10-05 10:19:59 mikeboers@maxwell: ~/Documents/Python/PyAV
$ time python
real 0m0.564s
user 0m0.729s
sys 0m0.241s
2013-10-05 10:20:01 mikeboers@maxwell: ~/Documents/Python/PyAV
$ time python
real 0m0.220s
user 0m0.457s
sys 0m0.059s
import subprocess
import numpy
proc = subprocess.Popen(['ffmpeg',
"-i", "sandbox/640x360.mp4",
"-f", "image2pipe",
"-pix_fmt", "rgb24",
"-vcodec", "rawvideo",
while True:
raw_image = * 360 * 3)
if not raw_image:
image = numpy.fromstring(raw_image, dtype='uint8').reshape((640, 360, 3))
import Image
import av
def frame_iter(video):
streams = [s for s in video.streams if s.type == b'video']
streams = [streams[0]]
for packet in video.demux(streams):
for frame in packet.decode():
yield frame
video ='sandbox/640x360.mp4')
frames = frame_iter(video)
for frame in frames:
img = Image.frombuffer("RGBA", (frame.width, frame.height), frame.to_rgba(), "raw", "RGBA", 0, 1)
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Something went wrong with that request. Please try again.