• Compression Techniques

  ffmpeg scaling issue

  Posted by Jack Passmore on September 29, 2010 at 7:22 pm

  Hi All,

  I have a large video file: 1920×1080, 16:9, .avi, 8-bit blackmagic mjpeg, that I’m trying to convert – using ffmpeg at the command line – to a h264, mp4, 640×480, 4:3, video.

  The 1920×1080 is a pillar-boxed image, so I’m attempting to crop the sides and then scale down the video to a 4:3, 640×480 video. Unfortunately, when I run the command I get a 640×480 video, but it’s only the top left corner of the 1920×1080 video. This is the command I’m using in terminal:

  ffmpeg -i video.avi -cropleft 240 -cropright 240 -s 640×480 -aspect 4:3 -vcodec libx264 -vpre normal video.mp4

  Any suggestions would be greatly appreciated!
  jack

  Jack Passmore replied 15 years, 7 months ago 1 Member · 0 Replies
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