[fritsch]

It's not a mp4 that file ... it's a .ts container. Try renaming it to .ts - in any case the file is broken as is.

Input #0, mpegts, from 'LG_4K_View-the-Feeling.mp4':
Duration: 00:00:46.81, start: 4200.000000, bitrate: 26105 kb/s
Program 1
Stream #0:0[0x1011]: Video: hevc (Main) (HEVC / 0x43564548), yuv420p(tv), 3840x2160 [SAR 1:1 DAR 16:9], 29.97 fps, 29.97 tbr, 90k tbn, 29.97 tbc
Stream #0:1[0x1100](und): Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 176 kb/s

You can rename it to .ts and then use a recent ffmpeg to pack it into an mp4 container again:

Code:

ffmpeg -i LG-whatever.ts -acodec copy -vcodec copy -bsf:a aac_adtstoasc output.mp4