I wouldn't give up so easy, ian. If you can give us the MediaInfo report, we can likely figure out what's going on and what to do about it.
Just open your original video in MediaInfo, then set the program's View menu to Text. Copy this text and paste it to this forum. We'll take it from there.
Thanks, Steve.
Is this the information that's needed?
Ian
General
Complete name : C:\Photographs\Temporary Photographs\IMG_0018.MP4
Format : MPEG-4
Format profile : Base Media / Version 2
Codec ID : mp42 (mp41)
File size : 183 MiB
Duration : 2 min 0 s
Overall bit rate : 12.8 Mb/s
Encoded date : UTC 2021-02-10 08:29:40
Tagged date : UTC 2021-02-10 08:29:40
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.2
Format settings : 1 Ref Frames
Format settings, CABAC : No
Format settings, Reference frames : 1 frame
Format settings, GOP : M=1, N=15
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 2 min 0 s
Bit rate : 12.0 Mb/s
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 30.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.194
Stream size : 173 MiB (94%)
Language : English
Encoded date : UTC 2021-02-10 08:29:40
Tagged date : UTC 2021-02-10 08:29:40
Codec configuration box : avcC
Audio
ID : 2
Format : PCM
Format settings : Little / Signed
Codec ID : sowt
Duration : 2 min 0 s
Bit rate mode : Constant
Bit rate : 705.6 kb/s
Channel(s) : 1 channel
Sampling rate : 44.1 kHz
Bit depth : 16 bits
Stream size : 10.1 MiB (6%)
Language : English
Encoded date : UTC 2021-02-10 08:29:40
Tagged date : UTC 2021-02-10 08:29:40