Elie Grouchko wrote: > I have been trying to rotate an mp4 video file on Windows, without > affecting the quality, encoding, etc. ...
I believe that is not possible. At least I cannot think of a way of doing it without re-encoding. > ... but the output file is not compatible with WMP. Yikes! That program from the firm that invented "incompatibilities" to bind and oppress their customers?! Maybe give some alternatives a go, generally, like VLC, MPC-HC etc. I think to remember that at least one of these programs supports rotating at playback time by means of filters/effects. > The command I have been using: > ffmpeg -i source.mp4 -vf "transpose=2" target.mp4 More output would have been nice. But I don't need it to tell you that this command does affect quality. -vf implies re-encoding, hence quality loss, unless one uses a lossless codec for the target which this command does not. And lossless video is rather huge. But for completeness' sake, a command that rotates and compresses the video losslessly: $ ffmpeg -i input.mp4 -vf "transpose=2" -c:v libx264 -crf 0 target.mp4 Just don't come crying about the size of target.mp4. ;) I think applying filters at playback is the better option. You might even be able to save a batch file that starts playback with the filter/effect applied to make it more transparent and less of a hassle. > I tried all the options I have been able to find online, but nothing > worked. If you have done so, why not tell us what you have already tried? ;) Makes things a whole lot easier. And just out of pure curiosity and spite I would like to know what that unholy WMP complains about. :P Best, Peter _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
