The you are using (Windows, Linux, or macOS).
A report on such a tool typically covers how it handles the merging process:
: The allmp4 portion suggests the script scans a directory for every file with an .mp4 extension. merge_allmp4_at_pe_mp4
Since there is no public documentation for a standard tool with this exact name, it is highly likely a or a batch command utilizing a media engine like FFmpeg . Technical Breakdown of the Process
: Automated scripts often merge files in alphabetical order. If the files are named 1.mp4 , 2.mp4 ... 10.mp4 , some systems might sort them as 1.mp4, 10.mp4, 2.mp4 . The you are using (Windows, Linux, or macOS)
: Frequent merging can occasionally lead to audio-video desync if the timestamps in the source files are inconsistent.
: The at_pe_mp4 likely defines the destination filename as pe.mp4 . Standard Implementation Example Technical Breakdown of the Process : Automated scripts
If you are looking to replicate or document this functionality, it usually follows this logic: