You could use AviDemux, VirtualDub,... whatever tool you like to cutout a portion of the file.
see for example: https://www.zml.kit.edu/downloads/Cut%20...inux).html
Audio&Video should be set to 'copy'
Cu Selur
see for example: https://www.zml.kit.edu/downloads/Cut%20...inux).html
Audio&Video should be set to 'copy'
Cu Selur
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Dev versions are in the 'experimental'-folder of my GoogleDrive, which is linked on the download page.
Dev versions are in the 'experimental'-folder of my GoogleDrive, which is linked on the download page.