Using ffmpeg to scale app preview videos for the AppStore

Question

I\'m generating an app preview video to send to the AppStore. Depending on the device type, the AppStore requires certain video resolutions.

I have a main video, wit

Answer 1

FFmpeg's scale filter will adjust the sample aspect ratio of the video so that the original display ratio is preserved. Apple, apparently, computes the new effective display resolution using that SAR.

Insert a setsar filter to reset the SAR to 1, so that the display resolution is the same as the stored resolution.

ffmpeg -i video_1920_1080.mp4 -vf scale=1920:886,setsar=1 -c:a copy video_1920_886.mp4