: Most scripts of this nature use the FFmpeg Concat Demuxer . This method is "lossless" because it copies the data streams without re-encoding them, provided all input files have the same resolution, frame rate, and codecs.
If you are looking to replicate or document this functionality, it usually follows this logic: merge_allmp4_at_pe_mp4
The you are using (Windows, Linux, or macOS). : Most scripts of this nature use the FFmpeg Concat Demuxer
: The allmp4 portion suggests the script scans a directory for every file with an .mp4 extension. : The allmp4 portion suggests the script scans
: The script creates a text file (e.g., inputs.txt ) listing all files to be merged.
: The at_pe_mp4 likely defines the destination filename as pe.mp4 . Standard Implementation Example
A report on such a tool typically covers how it handles the merging process: