The next 420x360x3 bytes afer that will represent the second frame, etc. If the video has a size of 420x320 pixels, then the first 420x360x3 bytes outputed byįFMPEG will give the RGB values of the pixels of the first frame, line by line, top to bottom.

Each ffmpeg argument is commented to describe why it is required. Once requested, a python generator is used to stream the results of a very crude subprocess which cats a video file into the ffmpeg docker container for muxing and returns the results in a pipe. Now we just have to read the output of FFMPEG. It serves HTML, which contains a video tag requesting video.mp4. It can be omitted most of the time in Python 2 but not in Python 3 where its default value is pretty small. In sp.Popen, the bufsize parameter must be bigger than the size of one frame (see below). Some languages might even have libraries of their own to extend FFMPEG natively.

FFMPEG can be used with almost any programming language with a couple of simple tricks. The format image2pipe and the - at the end tell FFMPEG that it is being used with a pipe by another program. Command line one-liners are great for quick and one off FFMPEG experiences but sooner or later you’re going to want to start building custom applications for efficiency. In the code above -i myHolidays.mp4 indicates the input file, while rawvideo/rgb24 asks for a raw RGB output. Import subprocess as sp command = pipe = sp.

Ffmpeg python generate mp4 in memory