Tag: pipe

Dynamically created QImage frames to ffmpeg stdin using QThread

I am trying to create video files with ffmpeg using frames dynamically created on a separate thread. While I can create those frames and store them on disk/memory, I’d like to avoid that passage since the amount/size of the frames can be high and many “jobs” could be created with different format or options. But, also importantly, I’d like to

Pipe raw OpenCV images to FFmpeg

ffmpeg linux opencv pipe python

Here’s a fairly straightforward example of reading off a web cam using OpenCV’s python bindings: Now I want to pipe the output to ffmpeg as in: $ python capture.py | ffmpeg -f image2pipe -pix_fmt bgr8 -i – -s 640×480 foo.avi Sadly, I can’t get the ffmpeg magic incantation quite right and it fails with libavutil 50.15. 1 / 50.15. 1

real time subprocess.Popen via stdout and PIPE

logging pipe popen python subprocess

I am trying to grab stdout from a subprocess.Popen call and although I am achieving this easily by doing: I would like to grab stdout in “real time”. With the above method, PIPE is waiting to grab all the stdout and then it returns. So for logging purposes, this doesn’t meet my requirements (e.g. “see” what is going on while