mp4concat

Python scripts to concatenate/merge/stitch together multiple MP4 and SRT video files.

MP4concat.py concatenates multiple MP4 files and adds chapter information to the merged file based on the original input file names. The script calls the ffmpeg and MP4Box executables under the hood to do the concatenation and chapter file naming:

• https://ffmpeg.org/
• https://github.com/gpac/gpac/wiki/MP4Box-Introduction

The ffmpeg and MP4Box executables are located in the bin/ directory.

Note - ffmpeg will need to generate intermediate files as part of its concatenation process. The python script will need to be able to write temporary files to its current working directory.

Large portions of this project were based on https://github.com/sverrirs/mp4combine

SRTconcat.py concatenates SRT subtitle files together and aligns the input subtitle files with the final merged MP4 ouput.

Build and activate the virtual environment

python -m venv .venv
source .venv/bin/activate
pip install -r requirements.txt

MP4concat usage

mkdir output
python MP4concat.py -i input/*.mp4 -o output/merged_video.mp4

SRTconcat usage

python SRTconcat.py -i input/*.srt -o output/merged_video.srt --mp4 output/merged_video.mp4

Notes

• If you have trouble viewing the chapter information in your concatenated video, try using another video player such as VLC.
• This script is intended to be used with video files w/ identical video resolutions. If you need to merge files with different resolutions, try https://github.com/sverrirs/mp4combine