From e69b5d2d338347d9dc72fac9471882b971378849 Mon Sep 17 00:00:00 2001
From: Hyperling <me@hyperling.com>
Date: Sun, 19 Jan 2025 16:37:02 -0700
Subject: [PATCH] Determine default video bitrates based on dimensions. Add
 file options to extension. Fix shrinking to certain sizes by using -2 as
 width. Tested successfully!

---
 files/scripts/compress_video.sh | 37 ++++++++++++++++++++++++++++++---
 1 file changed, 34 insertions(+), 3 deletions(-)

diff --git a/files/scripts/compress_video.sh b/files/scripts/compress_video.sh
index 9939667..f172177 100755
--- a/files/scripts/compress_video.sh
+++ b/files/scripts/compress_video.sh
@@ -32,7 +32,14 @@ function usage {
 		  -i input : The input file or folder with which to search for video files.
 		             If nothing is provided, current directory (.) is assumed.
 		  -v bitrate : The video bitrate to convert to.
-		               Defaults to '2000k'.
+		               Defaults are based on the size passed.
+								>= 2160:   '30M'
+								>= 1440:   '12M'
+								>= 1080:    '5M'
+								>=  720: '2000k'
+								>=  480:  '750k'
+								>=  360:  '250k'
+								 <  360:  '100k'
 		  -a bitrate : The audio bitrate to convert to.
 		               Defaults to '192k'.
 		  -c vcodec : The video codec you'd like to use, such as libopenh264.
@@ -96,13 +103,30 @@ if [[ -z "$input" ]]; then
 fi
 
 if [[ -z "$video_bitrate" ]]; then
-	video_bitrate="2000k"
+	# Based roughly on the 2.5 step iteration used for 720 and 1080.
+	if (( $size >= 2160 )); then
+		video_bitrate="30M"
+	elif (( $size >= 1440 )); then
+		video_bitrate="12M"
+	elif (( $size >= 1080 )); then
+		video_bitrate="5M"
+	elif (( $size >= 720 )); then
+		video_bitrate="2000k"
+	elif (( $size >= 480 )); then
+		video_bitrate="750k"
+	elif (( $size >= 360 )); then
+		video_bitrate="250k"
+	else
+		video_bitrate="100k"
+	fi
 fi
+compress_tags="$video_bitrate"
 video_bitrate="-b:v $video_bitrate -minrate 0 -maxrate $video_bitrate -bufsize $video_bitrate"
 
 if [[ -z "$audio_bitrate" ]]; then
 	audio_bitrate="192k"
 fi
+compress_tags="$compress_tags-$audio_bitrate"
 audio_bitrate="-b:a $audio_bitrate"
 
 if [[ -z "$codec" ]]; then
@@ -124,7 +148,11 @@ fi
 if [[ -z $size ]]; then
 	size="720"
 fi
-size="-filter:v scale=-1:$size"
+while (( ${#size} < 4 )); do
+    size="0$size"
+done
+compress_tags="$size-$compress_tags"
+size="-filter:v scale=-2:$size"
 
 ## Main ##
 
@@ -172,6 +200,9 @@ $search_command "$input" | sort | while read file; do
 	# Build the new filename to signify it is different than the original.
 	newfile="${file//$extension/$filename_flag-$date_YYYYMMDD.$extension_lower}"
 
+	# Add the size, video, and audio quality it was converted to.
+	newfile="${newfile//\.$extension_lower/_$compress_tags.$extension_lower}"
+
 	if [[ $newfile == $file ]]; then
 		echo "ERROR: The new calculated filename matches the old, skipping." >&2
 		continue