Am 23.03.2019 um 12:00 schrieb Rex East:
On Sat, Mar 23, 2019 at 7:46 PM Michael Koch
<[email protected]> wrote:
As far as I know, rotating without re-encoding isn't possible. Try this:
ffmpeg -i input.webm -vf rotate=PI/2 output.webm
Thank you Michael for the reply and information.
However, that command resulted in the video being cropped to a square
(original video is in portrait mode), and there is still significant
quality loss...
then you could pad the video before applying the rotate filter, and crop
it after the rotate filter:
-vf pad=iw:iw:-1:-1,rotate=PI/2,crop=xxx:ih
where xxx is the height of the input video
I'm not familiar with *.webm format. May be there are encoder options
for better quality.
Michael
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