support add multle mp4 file source with the same video parameters

[fastfading]

The fewer issues I have to read, the more new features I will have time to implement, so I ask that you please try these things first

• Check out all the menus and keyboard shortcuts. Maybe the feature already exists?
• Try with the newest version from GitHub
• Read the documentation and FAQ, Known issues, Troubleshooting to see if the feature already exists
• See if someone already suggested this under Issues or Discussions

Description

losslesscut support only mp4 file right now
please
support multle mp4 file source with the same video parameters
user can cut each file and merge them into one in one process

[mifi]

I don't understand what you mean. LosslessCut already supports drag-dropping multiple mp4 and merging/concatenating them. If you want to cut first, then you do that first, then concatenate the results.