GNU/Linux Desktop Survival Guide by Graham Williams
Desktop Survival Project Home Preface Advocacy History Distributions Installing GNU/Linux Basic Survival Wajig Applications AI, Machine Learning, Data Science Android - GNU/Linux Devices Audio Backup Booting CD Chinese ChRoot Clock Command Line Databases DIA Directories Disks EcoSysL Emacs Email Evolution Files File Systems Firewalls Floppy Disks FreedomBox Glade GNOME Graphics, Images, Photos Hardware Initialisations on Booting Installation Examples Internet IOT Java KDE Kernels Keyboard Konqueror KVM Switch LATEX Log System Login Magellan MATE Mathematics Memory Modems Mounting Devices MS/Windows Music MySQL Nautilus Networks Nextcloud Network File System NFS NT File System Oracle Packages Partitions Passwords PDF Power Management PPP Presentations Printing Python R Remote Desktops Rsync Samba Scanning Science Screens Security Spreadsheet SSH Swap Teradata Data Warehouse Themes TV Unity USB Version Control Video Virtualization Voice over IP WebCam WordPress Web Sites Word Processing and Printing X XML Troubleshooting Index

CLICK HERE TO VISIT THE UPDATED SURVIVAL GUIDE

Video Concatenate or Join

20200924 Two mp4 video files can be joined using ffmpeg with the concat filter. This filter expects the argument to -i to name a text file which will list the files to be concatenated, like concat.txt

file 'input1.mp4'
file 'input2.mp4'

$ ffmpeg -f concat -safe 0 -i concat.txt -c copy joined.mp4

Other options include using mencoder.

$ mencoder -ovc copy -oac copy video1.avi video2.avi -o video.avi

To join multiple avi files into one big avi file we can utilise avimerge:

$ avimerge -i a1.avi a2.avi a3.avi -o a.avi

I have found this latter approach to get the audio of the second file out of sync!