gpmnsp

## Install_VirtualBox_5.1_guest_additions.md

      
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                gpmnsp
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              October 17, 2017 20:27
                — forked from magnetikonline/README.md
            
              
                Install VirtualBox 5.1 guest additions on Ubuntu server guest.
              
          
    Install VirtualBox 5.1 guest additions on Ubuntu server guest

Have tested these instructions successfully under an Ubuntu 16.04LTS guest:


Create Ubuntu server instance under VirtualBox (obviously).


Start VM, goto Devices - Insert Guest Additions CD image to mount the ISO image.


From the terminal, run the following commands:
 $ sudo su
 $ apt install gcc make


## thumbnails.sh
#!/bin/zsh
# Script to generate thumbnails of a video and combine into one tile image.
#
# CAUTION:
# FFprobe might fail to extract duration info from a MKV container. Use
#     ffmpeg -i video.mkv -c:v copy -c:a copy video.mp4
# to swap to an MP4 container.
#
# Dependencies:
# 1. ffmpeg

## # Screensheetmaker.md

      
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                gpmnsp
                / # Screensheetmaker.md
            
            
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              March 21, 2023 21:11
            
              
                Screensheet maker for Linux bash and Windows CMD.EXE
              
          
    screensheetmaker


Consists of two scripts: make-screens.sh for Linux bash and make-screens.cmd for Windows CMD.EXE.
Uses ffmpeg, and montage and convert from Imagemagick package, additionally bc under Linux.
Works pretty fast. The approach is to divide the file into N intervals, one for each picture and pick the first keyframe after the midpoint of each interval. This is done quickly with a single run of ffmpeg, given the duration of each interval.
Known limitations: Length of the video. The shortest video I've run with success was 30 seconds, though the number of screens was limited (by the number of keyframes in the video).


make-screens.sh

Shell script to make screenshot pages from movies with ffmpeg.

  
## compile_ffmpeg.md

      
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              October 22, 2017 07:43
                — forked from teocci/compile_ffmpeg.md
            
              
                Compile FFmpeg on Ubuntu 16.04
              
          
Compile FFmpeg on Ubuntu

This basic guide supports Ubuntu Xenial Xerus 16.04 and will enable several external encoding and decoding libraries: libfaac (AAC encoder), libfdk-aac (AAC encoder), libmp3lame (MP3 encoder), libopencore-amr (AMR encoder/decoder), librtmp (for additional RTMP protocols), libtheora (Theora encoder), libvorbis (Vorbis encoder), libvpx (VP8 encoder/decoder), and libx264 (H.264 encoder). These are optional and may be omitted if desired. This guide will also install many filters (see the filter list in the [Filtering Guide][1].
Note: Copy and paste the whole code box for each step.
Preparation
	#!/bin/zsh
	# Script to generate thumbnails of a video and combine into one tile image.
	#
	# CAUTION:
	# FFprobe might fail to extract duration info from a MKV container. Use
	# ffmpeg -i video.mkv -c:v copy -c:a copy video.mp4
	# to swap to an MP4 container.
	#
	# Dependencies:
	# 1. ffmpeg