• Compression Techniques

  ffmpeg command creates a file too big

  Posted by Yuval Yellin on August 8, 2010 at 2:55 pm

  I run this command:
  /usr/bin/ffmpeg -i “inputfile.avi” -sameq -ss 0:0:0 -t 60 “outputfile.avi”
  And I get the correct 60 seconds video, however the file size is 300MB, while the original 20 minute long file is 170MB….
  what is wrong? how can I fix this filesize problem?

  Michael Rampe replied 15 years, 12 months ago 2 Members · 1 Reply
• 1 Reply

• 

  Michael Rampe

  August 9, 2010 at 7:16 am

  I would like to see the full terminal output to correctly diagnose but:

  I am guessing that it is a combination of using the -sameq flag and not specifying a video codec. The full command line output will verify that.

  Instead of using “-sameq”, try using “-vcodec copy” which will not recompress the frames and should result in a more realistic file size.

  Michael

  “half-way to world domination A.K.A. the belligerent blue bike shed”

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