Resizing Video on macOS for Apple App Store Page

Question

Sorry for posting this. I'm having lots of trouble resizing a video dimension for adding to the apple app store.

The video was recorded from the simulator in 1290x2796, the app store is saying it wants 886x1920

I'm looking for a terminal command, or something to get this video resized. It looks like Photos cannot do it, iMovie is gone nowadays, does anyone know a mac friendly option?

Answer 1

So I finally solved this, here are the steps to record a video on the simulator and get it to go the the Apple App Store Page as an App Preview

STEP 1: Record the video, run the simulator and go to File > Record Screen

STEP 2: Overwrite the audio, this is to avoid the, 'corrupted audio error'

From terminal

ffmpeg -f lavfi -i anullsrc=channel_layout=stereo:sample_rate=44100 -i input.mp4 -c:v copy -c:a aac -shortest output.mp4

STEP 3: Change Dimensions of Video

Next run the output into another ffmpeg command to change the dimensions

ffmpeg -i output.mp4 -vf scale=886:1920 -r 30 outputFinal.mp4

STEP 4:

Finally adding the video for some reason adds a bunch of unneeded black video. My 27 Second clip was turned into 27 Seconds plus another 4 mins of black screen.

So go into Preview, Photos, Quicktime, or whatever and trim your final product.

That's it, With those four steps you can go from recording a video on the simulator to having apple accept the video on the app store page.

Thank you for all the comments and suggestions

Answer 2

I've also tried

ffmpeg -i input.mp4 -acodec copy -crf 12 -vf scale=886:1920,setsar=1:1,fps=60 output.mp4

ffmpeg -i input.mp4 -vf scale=886:1920 output.mp4

On the app store both deliver the corrupted audio error, both leave the file with this weird slowmotion thing