Rotating AVI files - loss of quality

[mickwombat]

Hi,
I have a bunch of videos filmed on a camera that was mounted sideways and would like to rotate them.

I have been using the command,

mencoder -vf rotate=1 -ovc lavc -oac copy <Original>.avi -o <copied>.avi

which works fine, but the files are then about 1/5th the size of the original. There is a noticeable loss in quality of the video being much more pixelated and grainy.

Any suggestions for programs to do the job properly...or am I doing something wrong.

Thanks

[Firewing1]

Taken from here, does this command help preserve the video quality?

mencoder -ovc lavc -lavcopts vcodec=mjpeg -vop rotate=1 -oac copy input.avi -o tmp1.avi

Firewing1

[mickwombat]

Well, that seems to have made the files about 10% larger, so no doubt there is no loss of quality.

All my media players go funny sometimes, and is fixed by a reboot.

It's late, so will let you know tomorrow how it went.

Thanks

[mickwombat]

Tested and videos seem fine. Thank you for the help.