ffmpeg-scripts

Convenient short-hand scripts for various complicated, but commonly-used ffmpeg commands

This is a repository for any scripts I write in order to make my life easier when working with the program ffmpeg. ffmpeg commands are often simple for quick & dirty jobs but complex and specific use-case commands can become unwieldy or tedious to re-type or re-research. Each script is listed below with its respective description and usage.

ffmpeg-target

Shorthand ffmpeg command for a two-pass encoding to target an approximate file size. Ideal for uploaded media which must meet tight file size constraints.

• Example: You have a 45 MB video file my_mov.mp4 and wish to upload it to a file sharing website with an 8.0 MB limit ** Command: . bin/ffmpeg-target.sh my_mov.mp4 7.95 my_smaller_mov.mp4 ** This will take my_mov.mp4 and re-encode it attempting to get it as close to 7.95 MB as possible. 7.95 instead of 8.0 as to not accidentally meet or exceed the constraint ** See Usage for more details on parameters

Usage

OS X & Linux:

. bin/ffmpeg-target.sh

Parameter	Flag	Flag(Formal)	Sub-Parameter(s)	Default Value	Description
input			path [str]		Absolute file path to your input video file
file_size			size [float]		Desired size of the output file, in megabytes
output			output [str]		Absolute file path for your output video file
lib	-l	--lib	library [str]	libx264	Library to use for video encoding
alib	-a	--alib	library [str]	aac	Library to use for audio encoding
abr	-b	--abr	bitrate [int]	128	Average audio encoding bitrate, in kilobits per second
threads	-t	--threads	threads [int]	0*	Number of worker threads for the encoding process (0 for auto-detect CPU cores)
yes	-y	--yes		false	Overwrite output file if file already exists in the output path
preset	-p	--preset	preset [str]	medium	Amount of time taken by ffmpeg to optimize quality per frame (see help)
help	-h				Displays the help menu, provided by Python's Argparse Library

Meta

Kevin Tyrrell – KevinTearUl@gmail.com

Distributed under the GPL3 license. See LICENSE for more information.

https://github.com/KevinTyrrell

Contributing

1. Fork it (https://github.com/KevinTyrrell/ffmpeg-scripts)
2. Create your feature branch (git checkout -b feature/fooBar)
3. Commit your changes (git commit -am 'Add some fooBar')
4. Push to the branch (git push origin feature/fooBar)
5. Create a new Pull Request