VideoReaderFFMPEG

Matlab wrapper for FFMPEG that implements a VideoReader-like interface.

Documentation

• Constructor: vr = VideoReaderFFMPEG('test.mp4');
• Additional arguments (optional):
  • tempFolder - path to save the temporary image files to (optional, defaults to ./)
  • FFMPEGpath - path to the ffmpeg and ffprobe binaries (optional, defaults to /usr/local/bin on osx/unix and C:\Program Files\ffmpeg\bin on windows)
  • imageFormat - image file format used to temporarily store frames (optional, defauts to tif)
• Properties: Width, Height, NumberOfFrames, FrameRate, Channels
• Methods:
  • read() with single frames or a range of frames [startFrame endFrame], e.g. vr.read([100 200]) reads frames 100 to 200, returns them as [WIDTH x HEIGHT x CHANNELS x NFRAMES] matrix
  • clean() deletes all temporary image files (automatically called upon object deletion)

Usage

vr = VideoReaderFFMPEG('test.mp4')  % open video file
frame10 = vr.read(10)               % read frame 10
frames100to200 = vr.read([100 200]) % read frames 100 to 200
vr.clean()                          % delete temporary image files after your done

Internals

• uses ffprobe to get meta data
• uses ffmpeg to export video frames as images which are loaded using matlab's imread()
• tested using ffmpeg v2.5 and v2.6