Thank you for your replies.
Solution: Disable Hardware decoding
@Warry, I doe not have any transition active. This problem is also shown when playing a video from the media library. And when using the pre-cut tool.
I tried changing to YUV/RGB, but nothing I change here seems to make any difference.
WOW, when checking this, I tested to disable hardware decoding. Disabling this was the solution.
@tomasc
Below a file description of a file that shows correctly, and a file description of a file that does not show correctly.
Both files are shot with a Samsung phone with similar settings.
Displayed incorrectly (bars as example)
General
Format : MPEG-4
Format profile : Base Media / Version 2
Codec ID : mp42 (isom/mp42)
File size : 147 MiB
Duration : 43 s 660 ms
Overall bit rate : 28.2 Mb/s
Frame rate : 30.000 FPS
com.android.version : 12
Video
ID : 1
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : Main@L5.1@Main
Codec ID : hvc1
Codec ID/Info : High Efficiency Video Coding
Duration : 43 s 660 ms
Bit rate : 27.9 Mb/s
Width : 3 840 pixels
Height : 2 160 pixels
Display aspect ratio : 16:9
Rotation : 180�
Frame rate mode : Variable
Frame rate : 30.000 FPS
Minimum frame rate : 29.654 FPS
Maximum frame rate : 30.344 FPS
Real frame rate : 30.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Bits/(Pixel*Frame) : 0.112
Stream size : 145 MiB (99%)
Title : VideoHandle
Language : English
Encoded date : 2023-08-02 12:58:49 UTC
Tagged date : 2023-08-02 12:58:49 UTC
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
mdhd_Duration : 43660
Codec configuration box : hvcC
Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : 2 / 40 / mp4a-40-2
Duration : 43 s 636 ms
Source duration : 43 s 605 ms
Bit rate mode : Constant
Bit rate : 256 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 1.33 MiB (1%)
Source stream size : 1.33 MiB (1%)
Title : SoundHandle
Language : English
Encoded date : 2023-08-02 12:58:49 UTC
Tagged date : 2023-08-02 12:58:49 UTC
mdhd_Duration : 43636
Displayed correctly (no bars):
Format : MPEG-4
Format profile : Base Media / Version 2
Codec ID : mp42 (isom/mp42)
File size : 77.9 MiB
Duration : 23 s 127 ms
Overall bit rate : 28.3 Mb/s
Frame rate : 29.792 FPS
Performer : Samsung SM-G990B
com.android.version : 13
Video
ID : 1
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : Main@L5.1@Main
Codec ID : hvc1
Codec ID/Info : High Efficiency Video Coding
Duration : 23 s 127 ms
Bit rate : 28.0 Mb/s
Width : 3 840 pixels
Height : 2 160 pixels
Display aspect ratio : 16:9
Frame rate mode : Variable
Frame rate : 29.792 FPS
Minimum frame rate : 14.998 FPS
Maximum frame rate : 30.644 FPS
Real frame rate : 30.000 FPS
Standard : PAL
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Bits/(Pixel*Frame) : 0.113
Stream size : 77.2 MiB (99%)
Title : VideoHandle
Language : English
Encoded date : 2023-08-02 12:15:10 UTC
Tagged date : 2023-08-02 12:15:10 UTC
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Codec configuration box : hvcC
Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : 2 / 40 / mp4a-40-2
Duration : 23 s 116 ms
Source duration : 22 s 976 ms
Bit rate mode : Constant
Bit rate : 256 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy