| #!/bin/bash | |
| # Change to the directory where the script is located | |
| cd "$(dirname "$0")" | |
| # Clear the terminal screen | |
| clear | |
| # Tool Intro Text | |
| echo -e "\033[1mAnamorphic DNG EXIF DeSqueeze for Exiftool - written by Rupert Warries for MAC OS\033[0m\n\n\033[1m------------ \033[0m\n\nThis Tool will rewrite each DNG's EXIF data to allow Lightroom to render each image de-squeezed in DEVELOP module (library will still show squeezed image - any program that reads the pixel ratio in EXIF will also work)." | |
| echo -e "\n\nUSAGE INSTRUCTION :\n1. Place this script from inside the folder containing the DNG images for processing\n2. Drag tool into a terminal window to run and follow the prompts\n3. DNG filenames must contain no spaces - run the tool by dragging into a terminal window and following the prompts\n4. an installation of Exiftool must be present for this script to operate\n\n\033[1m------------ \033[0m" |
There's not a lot of obvious documentation about how to work with non-SDR color spaces and transfer functions, especially for fixing issues. That's where this gist comes in.
This changes the metadata, losslessly fixing the improperly tagged file so that you don't have to re-encode.
ffmpeg -hide_banner -i input.mov -movflags write_colr+write_gama -c:v copy -colorspace 9 -color_primaries 9 -color_trc 16 -map_metadata 0 -c:a copy -movflags +faststart output.mov
Often we use ffmpeg commands that have esoteric or unmemorizable options. This is my dumping grounds for all the ones I need to remember somewhere. I am posting this publicly in the hope that it can help other people. If anyone has specific questions/suggestions/improvements for a command, please comment. If you're seeking help creating your own ffmpeg command, I recommend using ChatGPT. It may be bad at math, but it's actually really good at coming up with CLI usages, and even writing quick scripts for their use.
Encode a video losslessly for archiving and as a deinterlaced H.264+AAC file for viewing. This was designed for taking the uncompressed (!) Quicktime MOV output of Blackmagic Media Express and shrinking it to something more manageable for archiving as well as viewing. Note the "seek
| "\e[A": history-search-backward | |
| "\e[B": history-search-forward |
| # nick's yt-dlp config | |
| --write-auto-sub | |
| --embed-subs | |
| --embed-metadata | |
| --embed-chapters | |
| # requires https://github.com/QuantumWarpCode/yt-dlp-dearrow | |
| --use-postprocessor DeArrow:when=pre_process | |
| --sponsorblock-remove sponsor,selfpromo | |
| --prefer-free-formats | |
| -o %(uploader)s-%(title)s[%(resolution)s].%(ext)s |
| androidpolice.com###comment-policy | |
| twitter.com##.js-wtf-module | |
| facebook.com###homepage_panel_pagelet | |
| ##[id^="ac-lre-player-ph"] | |
| ##[class$="recvontent"] | |
| slickdeals.net##.fpGridBox:has-text(Bank Advertiser) |
| ### Keybase proof | |
| I hereby claim: | |
| * I am sturmen on github. | |
| * I am sturmen (https://keybase.io/sturmen) on keybase. | |
| * I have a public key ASD9flhSNpM6cHMBocIgZZeR9fpdXZHMb72sPq8u6QqD_wo | |
| To claim this, I am signing this object: |
| #!/bin/sh | |
| set -ex | |
| for i in *.mp4; do | |
| ffmpeg -y -i "$i" -c:v libvpx-vp9 -pass 1 -b:v 2M -crf 30 -threads 8 -speed 4 \ | |
| -pix_fmt yuv420p -tile-columns 6 -frame-parallel 1 \ | |
| -an -f webm /dev/null | |
| ffmpeg -i "$i" -c:v libvpx-vp9 -pass 2 -b:v 2M -crf 30 -threads 8 -speed 2 \ |