There is no audio when moving mp4 to a device other than Apple


Some project partners have recorded a video on an iPhone. Everything is as it should be when playing the video on the phone and its macbooks, but when we pass the video to our work computers (running Ubuntu), we do not get any sound.

What do we need to do differently?

A probe reveals this information about 2 audio streams and the video stream:

                Transmission # 0: 0 (und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 2 kb / s (default)
Metadata:
creation_time: 2018-12-03T21: 15: 48.000000Z
handler_name: Core Media Data Handler
Transmission # 0: 1 (und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 106 kb / s (default)
Metadata:
creation_time: 2018-12-03T21: 15: 48.000000Z
handler_name: Core Media Data Handler
Transmission # 0: 2 (und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p (tv, smpte170m / smpte170m / bt709), 268x480 [SAR 1:1 DAR 67:120], 2107 kb / s, 29.99 fps, 60 tbr, 600 tbn, 50 tbc (default)
Metadata:
creation_time: 2018-12-03T21: 15: 48.000000Z
handler_name: Core Media Data Handler
Encoder: h.264