adhihargo / utils

Simple utilities

Utilities

Things I hack together on mager weekends.

ffmpeg_2mp3

Something to convert video file to an MP3 audio file. It uses ffprobe on source file to determine appropriate audio bitrate.

ffmpeg_strip_audio/video

At times, you don't need the noise or just the noise (for further processing).

Usage:

ffmpeg_strip_audio FILE

With input a.mp4, output of strip_audio is a-.mp4 and for strip_video is a_audio.mp4.

ffmpeg_amplify

Amplify audio by explicit value or automatically based on original file's max loudness. If amplification level is determined based on original file's loudness, file will not be processed if it's outside MIN_THRESHOLD and MAX_THRESHOLD (see Arguments).

Usage:

ffmpeg_amplify.py [-h] [-v VOLUME] [-s] [-m MIN_THRESHOLD] [-M MAX_THRESHOLD] [-y] [-V] [--suffix SUFFIX] FILE

Arguments:

• -v VOLUME, --volume VOLUME: Manually set volume amplification level.
• -s, --show_only: Show FILE's current volume level, then exit.
• -m MIN_THRESHOLD, --min_threshold MIN_THRESHOLD: (Abs. value, default: 1.0)
• -M MAX_THRESHOLD, --max_threshold MAX_THRESHOLD: (Abs. value, default: 30.0)
• --suffix SUFFIX: Suffix to be appended to resulting filename.
• -y: Suppress question if file exists.
• -V: Verbosity

ffmpeg_join_av

Losslessly rejoin audio and video files. I loathe watching videos with ridiculously low audio volume, so I extract the audio to process in a DAW, then join it back with this script. Why such convoluted workflow? Saves me hours of recompressing, that's why.

Usage:

ffmpeg_join_av FILE

The assumptions are that FILE is an MP4 video file, and a corresponding FILE_audio.m4a to join it with exists.

Example:

• ffmpeg_join_av a.mp4 joins a.mp4 with a_audio.mp4 (if exist) into a_av.mp4.

ffmpeg_cut

Losslessly cut an audio or video file.

Usage:

ffmpeg_cut.py [-h] [-s START] [-e END] [-y] [-V] [--suffix SUFFIX] FILE

Arguments:

• -s START: Timestamp of starting point to cut from.
• -e END: Timestamp of end point to cut to.
• --suffix SUFFIX: Suffix to be appended to resulting filename.
• -c: Mark input FILE as config file. If set, other switches but -y and -V are ignored.
• -y: Suppress question if file exists.
• -V: Verbosity

If -c is set, script assumes FILE to be a configuration file with the following format:

[main]
src=FILE.mp4  # path to file
sections=1 2 3  # space separated sections to process

[sections]
1=
2=01:01  # starting timestamp for a section, first one left empty  
3=02:02
9=03:03  # to write any but the last section, put any number 

lnlatest

Instead of using installers, I prefer to extract zipped versions of programs I use, then symlink them to a generic name (e.g. E:\blender-2.79b-windows64 to E:\blender). Shortcuts can then just refer to the symlink and remain unchanged, even if the symlink points to a newer version. This script creates a link to the latest subdirectory in a path with names matching a pattern. Wrote it because I'm sick of constantly removing old symlink to create a different one targeting newer (manually typed) directory path.

Usage:

lnlatest.py [-h] [-d DIR_PATH] [-e] LINK PATTERN

Arguments:

• -d DIR_PATH: Specify root directory. If unspecified, it defaults to current working directory.
• -e: Automatically remove old symlink. Both mklink and ln won't overwrite existing link, so usually this is what we'd want. Putting it anyway just to make sure.
• LINK: Symlink name to be created.
• PATTERN: Glob pattern of directories to be matched. For example, emacs-* matches emacs-26.1-x86_64, emacs-25.0-x86_64, etc. Latest matching directory will be targeted if found.

pdf2qdf, qdf2pdf

Converts PDF to and from QDF, using qpdf. I use these to edit a PDF file's page numbering.

Usage:

pdf2qdf|qdf2pdf PDF_FILE

Input for qdf2pdf is also the PDF file, just so I can do the fewest change to the original command when converting back to PDF.

pdfdata

Dump and update PDF metadata, using PDFtk. I use this to edit a PDF file's bookmark list (table of contents).

Usage:

pdfdata.py [-h] [-d [DATAFILE]] [-s [DATAFILE]] [-T [TOCFILE]] [-t [TOCFILE]] [-o [OUTPUT]] FILE

• -d [DATAFILE], --dump [DATAFILE]: Dump PDF data to file.
• -s [DATAFILE], --set [DATAFILE]: Set PDF data from file.
• -T [TOCFILE], --dump_toc [TOCFILE]: Dump PDF bookmark data to a TOC file.
• -t [TOCFILE], --toc [TOCFILE]: Set PDF bookmark data from TOC file.
• -o [OUTPUT], --output [OUTPUT]: Output PDF file if setting PDF data.

wmctrl_gridmove

When I use Gnome DE, I miss JGPaiva's GridMove. So I wrote this script, a crude approximation of GridMove's template I use most using wmctrl and X utils. It's meant to be called through custom keyboard shortcut.

Usage:

wmctrl_gridmove.py [-h] [-d DISPLAY_ID] {l,r,m}

Arguments:

• -d DISPLAY_ID: Move active window to assigned monitor, 0-indexed.
• POS: Positional argument, either l, r or m to move and resize active window to the left or right side or maximized, respectively, of assigned monitor.

Example:

• wmctrl_gridmove.py -m 0 l moves active window to 1st monitor's left side. Simple, eh?