Script to crop videos for video wall

readme.md

Python script to crop video for video wall aplications using ffmpeg.

Required:

• ffmpeg installed;
• ffprobe installed;

Using: python video-wall.py video-file nxn

• video-file - path to video file
• nxn - matriz of video wall

Ex.: python video-wall.py videoToCrop.mp4 2x3

video-wall.py

import sys, re, os.path, os, json

patternVideoWall = re.compile("\d*[x]\d*");

args = sys.argv
videoFile = args[1];
matrizVideoWall = args[2];

if not patternVideoWall.match(matrizVideoWall):
	print "Error video wall parameters. Ex. python video-wall.py videoFile.mp4 2x2";
	sys.exit();

if not os.path.exists(videoFile):
	print "Error video file doesn't exists";
	sys.exit();

matrizVideoWall = matrizVideoWall.split('x');
rows = int(matrizVideoWall[0]);
columns = int(matrizVideoWall[1]);

cmdGetSettings = "ffprobe -v error -show_entries stream=width,height \-of default=noprint_wrappers=1 " + videoFile;

videoFileSettings = os.popen(cmdGetSettings).read().split("\n");
width = int(videoFileSettings[0].replace("width=",""));
height = int(videoFileSettings[1].replace("height=",""));

widthPart = width/columns;
heightPart = height/rows;

print widthPart;
print heightPart;

for row in range(1, rows + 1):
	print "Row " + str(row);
	for column in range(1, columns+1):
		xIni = str((column - 1) * widthPart);
		yIni = str((row - 1) * heightPart);
		cmdCropVideo = "ffmpeg -i " + videoFile + " -filter:v crop="+ str(widthPart) + ":" + str(heightPart) + ":" + xIni + ":" + yIni + " out_" + str(row) + "_" + str(column) + ".mp4 -y";
		print cmdCropVideo;
		result = os.popen(cmdCropVideo).read();
		print result;