Export full timeline but missing some parts

What is your operating system?
I’m using Windows 10 Enterprise

What is your Shotcut version (see Help > About Shotcut)? Is it 32-bit?
Shotcut version is 22.06.23, 64 bits.

Can you repeat the problem? If so, what are the steps?
I created a projet with following elements:

  • One video track to make subtitles (V4)
  • Two video track to mask some part of the video wich are confidential (V3 and V2)
  • One video track wich contain the main video
  • One sound track wich contain a voice
  • One sound track wich contain a music background

When I check my project with the preview everything seems ok.
But when I export it ( I tried the preset H.264 High Profile, Youtube and default) with the Timeline, some parts of my tracks V3 and V2 are missing. For example, those selected in red are missing.
I don’t understand why.
What I don’t understand is that there is a difference between the preview and the file exported in .mp4 format.

Could you help me please?

Thank you in advance.

Marius Bonnin

Have you applied any filters to clips 1, 2, or 3? If so, what filters did you apply?
Clips 4 through 8 what filters are applied?

If possible, could you share the project MLT? You can just drag the MLT file into the reply window and it will upload it. The MLT is just lines of code. Your media is not needed.

Thank you for you reply.

Clips 1 have no filter.

Clip 2 have following filters:

  • Crop: source
  • Mosaic
  • Size, position & rotate

Clip 3 have following filters:

  • Size, position & rotate

Clip 4 through 8 is a simple texte to make subtitles, this part is working well

You can check the MLT project at the following link:
Motosim1.mlt (141.6 KB)