On Mon, Jan 15, 2018 at 4:51 PM, Davood Falahati <[email protected]> wrote: > Dear all, > > I am using transcoding.c example. I want to know how should I rotate the > video by 90 degrees. The same thing that applies with > $ ffmpeg -i input_video -vf "transpose=1" output_video > in cli tool.
There doesn't seem to be many replies on this mailing list, so I hope I can help. You can create a filter graph and add a filter to rotate the frame. As you are looking at examples, this is one for creating filter graphs: https://github.com/FFmpeg/FFmpeg/blob/master/doc/examples/filtering_video.c You can add a rotate filter to rotate by any amount: http://ffmpeg.org/ffmpeg-filters.html#rotate You can also flip horizontal or vertical with specific filters. http://ffmpeg.org/ffmpeg-filters.html#hflip _______________________________________________ Libav-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/libav-user
