Revision of Compress MKV and MP4 to MP4 with options

airikr revised this gist 1 month ago. Go to revision

1 file changed, 1 insertion

gistfile1.txt

			@@ -132,6 +132,7 @@ EXISTING_ID="$(ffprobe -v error \
132	132
133	133		if [[ "$EXISTING_ID" =~ ^${UNIQUE_PREFIX}[A-Za-z0-9]+$ ]]; then
134	134		echo "Skipping already-compressed file: $INPUT"
	135	+	echo
135	136		exit 0
136	137		fi
137	138

airikr revised this gist 1 month ago. Go to revision

1 file changed, 2 insertions

gistfile1.txt

			@@ -7,6 +7,8 @@
7	7		# - Adding metadata to compressed MP4 file.
8	8		# - Checking if the file has already been compressed by this script.
9	9		#
	10	+	# However, I have done some fine tuning like adding new rows.
	11	+	#
10	12		##########################################################################
11	13
12	14		set -u

airikr revised this gist 1 month ago. Go to revision

1 file changed, 55 insertions, 13 deletions

gistfile1.txt

			@@ -1,15 +1,16 @@
1	1		#!/usr/bin/env bash
2	2
3		-	########################################################################
	3	+	##########################################################################
4	4		#
5		-	# This bash script was written by ChatGPT, but not this docblock.
	5	+	# This bash script was written by ChatGPT, but not this comment section.
6	6		# Everything works after testing, but not 2 functions:
7	7		# - Adding metadata to compressed MP4 file.
8	8		# - Checking if the file has already been compressed by this script.
9	9		#
10		-	########################################################################
	10	+	##########################################################################
11	11
12	12		set -u
	13	+	export LC_NUMERIC=C
13	14
14	15		SCRIPT_NAME="$(basename "$0")"
15	16		UNIQUE_PREFIX="r-"
			@@ -55,7 +56,7 @@ if [[ "${1:-}" == "batch" ]]; then
55	56		shift \|\| true
56	57
57	58		shopt -s nullglob
58		-	FILES=( .mp4 .mkv )
	59	+	FILES=( .mp4 .MP4 *.mkv )
59	60		shopt -u nullglob
60	61
61	62		if [[ ${#FILES[@]} -eq 0 ]]; then
			@@ -87,7 +88,7 @@ fi
87	88
88	89		BASENAME="${INPUT%.*}"
89	90		OUTPUT="${BASENAME}-r.mp4"
90		-	SUMMARY="${BASENAME}-summary.json"
	91	+	SUMMARY="${BASENAME}.json"
91	92
92	93		########################################
93	94		# Resolution
			@@ -140,9 +141,15 @@ COMPRESS_ID="${UNIQUE_PREFIX}$(tr -dc A-Za-z0-9 </dev/urandom \| head -c 12)"
140	141		########################################
141	142		# Encode
142	143		########################################
	144	+	echo
143	145		echo "Compressing: $INPUT > $OUTPUT"
144	146
145		-	if ! ffmpeg -y -hide_banner -loglevel error -stats \
	147	+	DURATION=$(ffprobe -v error -show_entries format=duration \
	148	+	-of default=nk=1:nw=1 "$INPUT")
	149	+
	150	+	START_TIME=$(date +%s)
	151	+
	152	+	ffmpeg -y -hide_banner -loglevel error \
146	153		-i "$INPUT" \
147	154		-map 0:v:0 -map 0:a? \
148	155		-vf "$SCALE" \
			@@ -155,10 +162,31 @@ if ! ffmpeg -y -hide_banner -loglevel error -stats \
155	162		"${AUDIO_OPTS[@]}" \
156	163		-movflags +faststart \
157	164		-metadata compressed_by="$COMPRESS_ID" \
158		-	"$OUTPUT"; then
159		-	echo "FFmpeg failed for $INPUT"
160		-	exit 0
161		-	fi
	165	+	-progress pipe:1 \
	166	+	"$OUTPUT" 2>/dev/null \| while IFS='=' read -r key value; do
	167	+
	168	+	if [[ "$key" == "out_time_ms" ]]; then
	169	+	CURRENT_SEC=$(awk "BEGIN { print $value / 1000000 }")
	170	+
	171	+	PERCENT=$(awk -v c="$CURRENT_SEC" -v d="$DURATION" \
	172	+	'BEGIN { if (d>0) printf "%.1f", (c/d)*100; else print 0 }')
	173	+
	174	+	NOW=$(date +%s)
	175	+	ELAPSED_SEC=$(( NOW - START_TIME ))
	176	+
	177	+	ETA_SEC=$(awk -v e="$ELAPSED_SEC" -v p="$PERCENT" '
	178	+	BEGIN {
	179	+	if (p>0) printf "%.0f", e*(100-p)/p;
	180	+	else print 0
	181	+	}')
	182	+
	183	+	printf "\rProgress: %5.1f%% \| Elapsed: %02d:%02d \| ETA: %02d:%02d" \
	184	+	"$PERCENT" \
	185	+	$((ELAPSED_SEC/60)) $((ELAPSED_SEC%60)) \
	186	+	$((ETA_SEC/60)) $((ETA_SEC%60))
	187	+	fi
	188	+
	189	+	done
162	190
163	191		########################################
164	192		# Size check
			@@ -167,7 +195,8 @@ ORIG_SIZE=$(stat -c%s "$INPUT")
167	195		NEW_SIZE=$(stat -c%s "$OUTPUT")
168	196
169	197		if (( NEW_SIZE >= ORIG_SIZE )); then
170		-	echo "Result larger than original → skipping"
	198	+	echo
	199	+	echo "Result larger than original - skipping"
171	200		rm -f "$OUTPUT"
172	201		exit 0
173	202		fi
			@@ -179,6 +208,15 @@ HUMAN_ORIG=$(numfmt --to=iec --suffix=B "$ORIG_SIZE")
179	208		HUMAN_NEW=$(numfmt --to=iec --suffix=B "$NEW_SIZE")
180	209		OCCURRED=$(date +"%Y-%m-%d %H:%M:%S")
181	210
	211	+	########################################
	212	+	# Safe reduction percent calculation
	213	+	########################################
	214	+	if [[ -z "$ORIG_SIZE" ]] \|\| (( ORIG_SIZE == 0 )); then
	215	+	REDUCTION_PERCENT=0
	216	+	else
	217	+	REDUCTION_PERCENT=$(awk "BEGIN { pct=(1-$NEW_SIZE/$ORIG_SIZE)*100; if(pct<0) pct=0; printf \"%.2f\", pct }")
	218	+	fi
	219	+
182	220		cat > "$SUMMARY" <<EOF
183	221		{
184	222		"input": "$(basename "$INPUT")",
			@@ -190,7 +228,7 @@ cat > "$SUMMARY" <<EOF
190	228		"original": "$HUMAN_ORIG",
191	229		"compressed": "$HUMAN_NEW",
192	230
193		-	"reduction_percent": $(awk "BEGIN { printf \"%.2f\", (1-$NEW_SIZE/$ORIG_SIZE)*100 }"),
	231	+	"reduction_percent": $REDUCTION_PERCENT,
194	232		"occurred": "$OCCURRED",
195	233
196	234		"compression_id": "$COMPRESS_ID",
			@@ -215,4 +253,8 @@ cat > "$SUMMARY" <<EOF
215	253		}
216	254		EOF
217	255
218		-	echo "Done ✓"
	256	+	REDUCTION_HR=$(awk "BEGIN { printf \"%.2f\", (1 - $NEW_SIZE / $ORIG_SIZE) * 100 }")
	257	+
	258	+	echo
	259	+	echo "Done. Final reduction: $REDUCTION_HR% ($HUMAN_ORIG > $HUMAN_NEW)"
	260	+	echo

airikr revised this gist 1 month ago. Go to revision

1 file changed, 218 insertions

gistfile1.txt(file created)

		@@ -0,0 +1,218 @@
1	+	#!/usr/bin/env bash
2	+
3	+	########################################################################
4	+	#
5	+	# This bash script was written by ChatGPT, but not this docblock.
6	+	# Everything works after testing, but not 2 functions:
7	+	# - Adding metadata to compressed MP4 file.
8	+	# - Checking if the file has already been compressed by this script.
9	+	#
10	+	########################################################################
11	+
12	+	set -u
13	+
14	+	SCRIPT_NAME="$(basename "$0")"
15	+	UNIQUE_PREFIX="r-"
16	+
17	+	########################################
18	+	# Encoding presets overview:
19	+	#
20	+	# none : balanced quality, AAC 96k
21	+	# vlog : spoken voice / crowd, copy audio
22	+	# tiny : max compression, AAC 64k
23	+	#
24	+	# Resolutions: 720p \| 1080p
25	+	########################################
26	+
27	+	show_help() {
28	+	cat <<EOF
29	+	Usage:
30	+	$SCRIPT_NAME <file>
31	+	$SCRIPT_NAME [none\|vlog\|tiny] [720p\|1080p] <file>
32	+	$SCRIPT_NAME batch
33	+
34	+	Batch:
35	+	Compresses all MP4 + MKV files using:
36	+	mode=none, resolution=1080p
37	+
38	+	Defaults:
39	+	mode=none
40	+	resolution=720p
41	+
42	+	EOF
43	+	exit 0
44	+	}
45	+
46	+	[[ "${1:-}" == "--help" ]] && show_help
47	+
48	+	MODE="none"
49	+	RES="720p"
50	+
51	+	# --- Batch mode ---
52	+	if [[ "${1:-}" == "batch" ]]; then
53	+	MODE="none"
54	+	RES="1080p"
55	+	shift \|\| true
56	+
57	+	shopt -s nullglob
58	+	FILES=( .mp4 .mkv )
59	+	shopt -u nullglob
60	+
61	+	if [[ ${#FILES[@]} -eq 0 ]]; then
62	+	echo "No MP4 or MKV files found."
63	+	exit 0
64	+	fi
65	+
66	+	for f in "${FILES[@]}"; do
67	+	"$0" "$MODE" "$RES" "$f"
68	+	done
69	+	exit 0
70	+	fi
71	+
72	+	# --- Parse arguments ---
73	+	if [[ $# -eq 1 ]]; then
74	+	INPUT="$1"
75	+	elif [[ $# -eq 2 ]]; then
76	+	MODE="$1"
77	+	INPUT="$2"
78	+	elif [[ $# -eq 3 ]]; then
79	+	MODE="$1"
80	+	RES="$2"
81	+	INPUT="$3"
82	+	else
83	+	show_help
84	+	fi
85	+
86	+	[[ ! -f "$INPUT" ]] && { echo "File not found: $INPUT"; exit 1; }
87	+
88	+	BASENAME="${INPUT%.*}"
89	+	OUTPUT="${BASENAME}-r.mp4"
90	+	SUMMARY="${BASENAME}-summary.json"
91	+
92	+	########################################
93	+	# Resolution
94	+	########################################
95	+	case "$RES" in
96	+	720p) SCALE="scale=-2:720" ;;
97	+	1080p) SCALE="scale=-2:1080" ;;
98	+	*) echo "Invalid resolution"; exit 1 ;;
99	+	esac
100	+
101	+	########################################
102	+	# Mode settings
103	+	########################################
104	+	CQ=23
105	+	AUDIO_OPTS=("-c:a" "aac" "-b:a" "96k")
106	+
107	+	case "$MODE" in
108	+	vlog)
109	+	AUDIO_OPTS=("-c:a" "copy")
110	+	CQ=23
111	+	;;
112	+	tiny)
113	+	AUDIO_OPTS=("-c:a" "aac" "-b:a" "64k")
114	+	CQ=28
115	+	;;
116	+	none) ;;
117	+	*)
118	+	echo "Invalid mode"
119	+	exit 1
120	+	;;
121	+	esac
122	+
123	+	########################################
124	+	# Metadata detection (robust)
125	+	########################################
126	+	EXISTING_ID="$(ffprobe -v error \
127	+	-show_entries format_tags=compressed_by \
128	+	-of default=nk=1:nw=1 "$INPUT" 2>/dev/null \|\| true)"
129	+
130	+	if [[ "$EXISTING_ID" =~ ^${UNIQUE_PREFIX}[A-Za-z0-9]+$ ]]; then
131	+	echo "Skipping already-compressed file: $INPUT"
132	+	exit 0
133	+	fi
134	+
135	+	########################################
136	+	# Generate unique ID
137	+	########################################
138	+	COMPRESS_ID="${UNIQUE_PREFIX}$(tr -dc A-Za-z0-9 </dev/urandom \| head -c 12)"
139	+
140	+	########################################
141	+	# Encode
142	+	########################################
143	+	echo "Compressing: $INPUT > $OUTPUT"
144	+
145	+	if ! ffmpeg -y -hide_banner -loglevel error -stats \
146	+	-i "$INPUT" \
147	+	-map 0:v:0 -map 0:a? \
148	+	-vf "$SCALE" \
149	+	-c:v hevc_nvenc \
150	+	-preset p6 -tune hq \
151	+	-rc vbr -multipass fullres \
152	+	-profile:v main -pix_fmt yuv420p \
153	+	-spatial_aq 1 -temporal_aq 1 -aq-strength 8 \
154	+	-cq "$CQ" \
155	+	"${AUDIO_OPTS[@]}" \
156	+	-movflags +faststart \
157	+	-metadata compressed_by="$COMPRESS_ID" \
158	+	"$OUTPUT"; then
159	+	echo "FFmpeg failed for $INPUT"
160	+	exit 0
161	+	fi
162	+
163	+	########################################
164	+	# Size check
165	+	########################################
166	+	ORIG_SIZE=$(stat -c%s "$INPUT")
167	+	NEW_SIZE=$(stat -c%s "$OUTPUT")
168	+
169	+	if (( NEW_SIZE >= ORIG_SIZE )); then
170	+	echo "Result larger than original → skipping"
171	+	rm -f "$OUTPUT"
172	+	exit 0
173	+	fi
174	+
175	+	########################################
176	+	# JSON summary
177	+	########################################
178	+	HUMAN_ORIG=$(numfmt --to=iec --suffix=B "$ORIG_SIZE")
179	+	HUMAN_NEW=$(numfmt --to=iec --suffix=B "$NEW_SIZE")
180	+	OCCURRED=$(date +"%Y-%m-%d %H:%M:%S")
181	+
182	+	cat > "$SUMMARY" <<EOF
183	+	{
184	+	"input": "$(basename "$INPUT")",
185	+	"output": "$(basename "$OUTPUT")",
186	+
187	+	"original_bytes": $ORIG_SIZE,
188	+	"compressed_bytes": $NEW_SIZE,
189	+
190	+	"original": "$HUMAN_ORIG",
191	+	"compressed": "$HUMAN_NEW",
192	+
193	+	"reduction_percent": $(awk "BEGIN { printf \"%.2f\", (1-$NEW_SIZE/$ORIG_SIZE)*100 }"),
194	+	"occurred": "$OCCURRED",
195	+
196	+	"compression_id": "$COMPRESS_ID",
197	+
198	+	"settings": {
199	+	"codec": "hevc_nvenc",
200	+	"resolution": "$RES",
201	+	"mode": "$MODE",
202	+	"cq": $CQ,
203	+	"scale_filter": "$SCALE",
204	+	"audio": "${AUDIO_OPTS[*]}",
205	+	"preset": "p6",
206	+	"rate_control": "vbr",
207	+	"multipass": "fullres",
208	+	"pixel_format": "yuv420p",
209	+	"aq": {
210	+	"spatial": 1,
211	+	"temporal": 1,
212	+	"strength": 8
213	+	}
214	+	}
215	+	}
216	+	EOF
217	+
218	+	echo "Done ✓"

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