Losslessly rotate videos from your phone by 90 degrees.

mkdir rotated; for v in *.3gp; do ffmpeg -i $v -vf transpose=2 -vcodec ffv1 rotated/${v/3gp/avi} ; done
Takes all the .3gp files in the directory, rotates them by 90 degrees, and saves them in the lossless ffv1 encoding. If this rotates in the wrong direction, you may want transponse=1 Re-encoding to ffv1 may result in a significant increase in file size, as it is a lossless format. Other applications may not recognize ffv1 if they don't use ffmpeg code. "huffyuv" might be another option for lossless saving of your transformations. The audio may be re-encoded as well, if the encoding used by your 3gp file doesn't work in a avi container.

5
By: keturn
2012-02-04 18:20:04

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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