have to convert to aac codec in order to have audio on iPhone

[freemant2000]

The video works but no sound on iPhone 11 (not sure about other versions) or iPad. I worked around it by converting to the aac codec:

ffmpeg -i input.mp4 -c:v copy -c:a aac -b:a 384k output.mp4

[niknah]

Thanks for the tip. Another option is go to preferences and pick record with webm.

[freemant2000]

Thanks! Are you sure it works? The video is sent to the recipient by instant messaging and is not played by the browser.

[niknah]

Only if the instant messaging software is ok with webm.