1ffmpeg -i input.mp4 -c:v copy -an output.mp4Remove sound of all *.mp4 videos in a folder and override the files (⚠️ careful)
1for f in *.mp4; do ffmpeg -i "$f" -c:v copy -an "temp_$f" && mv "temp_$f" "$f"; doneNote: Make sure to backup your folder first.
1for f in *.mp4; do
2 ffmpeg -i "$f" -filter_complex "[0:v]tpad=start_duration=0.033:color=black" -map "0:a?" -c:a copy -y "temp.mp4" && mv "temp.mp4" "$f"
3doneCompress all images in the current folder,
1for file in *.jpg *.jpeg *.png; do ffmpeg -i "$file" -q:v 10 -y "${file%.*}_temp.${file##*.}" && mv "${file%.*}_temp.${file##*.}" "$file"; done- Compress and resize video to 480p
1ffmpeg -i file_name.mp4 -vf scale=-2:480 -c:v libx264 -preset medium -crf 23 -c:a aac -b:a 128k -movflags +faststart file_name_compressed.mp4- Compress and resize all videos in the current folder to 480p
1for file in *.{mp4,mov,avi,mkv,m4v}; do
2 [ -f "$file" ] || continue
3 ffmpeg -i "$file" -vf "scale=-2:480" -c:v libx264 -crf 28 -preset slow -c:a aac -b:a 96k "480p_${file%.*}.mp4"
4done- Create a handy command in
.zshrcor.bashrcto compress a video
1fix_video() {
2 local replace=false
3 local input=""
4 local threads="6"
5
6 # Parse arguments
7 while [[ $# -gt 0 ]]; do
8 case $1 in
9 --replace)
10 replace=true
11 shift
12 ;;
13 --threads)
14 if [[ -n "$2" && "$2" =~ ^[0-9]+$ ]]; then
15 threads="$2"
16 shift 2
17 else
18 echo "Error: --threads requires a numeric value"
19 return 1
20 fi
21 ;;
22 *)
23 if [[ -z "$input" ]]; then
24 input="$1"
25 else
26 echo "Error: Multiple input files specified"
27 return 1
28 fi
29 shift
30 ;;
31 esac
32 done
33
34 if [[ -z "$input" ]]; then
35 echo "Usage: fix_video [--replace] [--threads N] <filename.ext>"
36 return 1
37 fi
38
39 local basename="${input%.*}"
40 local output_file
41 local ffmpeg_cmd="ffmpeg -i \"$input\" -threads $threads -c:v libx264 -c:a aac -map_metadata 0"
42
43 if [[ "$replace" == true ]]; then
44 # Create temporary file first, then replace original
45 output_file="${basename}_temp.mp4"
46 eval "$ffmpeg_cmd \"$output_file\""
47
48 if [[ $? -eq 0 ]]; then
49 # Preserve original file's creation date
50 touch -r "$input" "$output_file"
51 mv "$output_file" "$input"
52 echo "Video fixed and replaced: $input"
53 else
54 rm -f "$output_file"
55 echo "Error: Failed to process video"
56 return 1
57 fi
58 else
59 # Create new file with fixed_ prefix
60 output_file="fixed_${basename}.mp4"
61 eval "$ffmpeg_cmd \"$output_file\""
62
63 if [[ $? -eq 0 ]]; then
64 # Preserve original file's creation date
65 touch -r "$input" "$output_file"
66 echo "Video fixed: $output_file"
67 else
68 echo "Error: Failed to process video"
69 return 1
70 fi
71 fi
72}Usage:
fix_video [--replace] [--threads N] <filename.ext>- Do the same things for all videos in a folder,
1fix_all_videos() {
2 local replace=false
3 local target_folder="."
4 local threads="6"
5 locall processed_count=0
6 local error_count=0
7
8 # Parse arguments
9 while [[ $# -gt 0 ]]; do
10 case $1 in
11 --replace)
12 replace=true
13 shift
14 ;;
15 --threads)
16 if [[ -n "$2" && "$2" =~ ^[0-9]+$ ]]; then
17 threads="$2"
18 shift 2
19 else
20 echo "Error: --threads requires a numeric value"
21 return 1
22 fi
23 ;;
24 *)
25 if [[ -z "$target_folder" || "$target_folder" == "." ]]; then
26 target_folder="$1"
27 else
28 echo "Error: Multiple target folders specified"
29 return 1
30 fi
31 shift
32 ;;
33 esac
34 done
35
36 # Check if target folder exists
37 if [[ ! -d "$target_folder" ]]; then
38 echo "Error: Folder '$target_folder' does not exist"
39 return 1
40 fi
41
42 # Define common video extensions
43 local extensions=("mp4" "MP4" "mov" "MOV" "avi" "AVI" "mkv" "MKV" "webm" "WEBM" "flv" "FLV" "wmv" "WMV" "m4v" "M4V")
44
45 echo "Searching for videos in: $target_folder"
46 echo "Mode: $([ "$replace" == true ] && echo "Replace original files" || echo "Create new files with 'fixed_' prefix")"
47 echo "Threads: $threads"
48 echo "----------------------------------------"
49
50 # Find and process all video files
51 for ext in "${extensions[@]}"; do
52 while IFS= read -r -d '' file; do
53 echo "Processing: $(basename "$file")"
54
55 # Call fix_video function for each file
56 if [[ "$replace" == true ]]; then
57 fix_video --replace --threads "$threads" "$file"
58 else
59 fix_video --threads "$threads" "$file"
60 fi
61
62 if [[ $? -eq 0 ]]; then
63 ((processed_count++))
64 echo "✅ Success: $(basename "$file")"
65 else
66 ((error_count++))
67 echo "❌ Failed: $(basename "$file")"
68 fi
69 echo ""
70 done < <(find "$target_folder" -maxdepth 1 -name "*.${ext}" -type f -print0 2>/dev/null)
71 done
72
73 echo "----------------------------------------"
74 echo "Processing complete!"
75 echo "✅ Successfully processed: $processed_count videos"
76 if [[ $error_count -gt 0 ]]; then
77 echo "❌ Failed: $error_count videos"
78 fi
79}Usage:
fix_all_videos [--replace] [--threads N] [folder]. Use . for the current folder of the cursor.Merge all video files named
a_1.mp4, a_2.mp4, etc. into a single file a.mp4 in order, with smooth transitions.1ffmpeg -f concat -safe 0 -i <(for i in {1..2}; do echo "file '$(pwd)/a_$i.mp4'"; done) -c:v libx264 -preset fast -crf 23 -c:a aac a.mp4An alias in
.zshrc or .bashrc to merge and also mute all video starting with letter a and the number of the last file is 51alias merge_video='_merge_video() {
2 local prefix=$1
3 local last=$2
4 local concat_file=$(mktemp)
5
6 for i in {1..$last}; do
7 echo "file '\''$(pwd)/${prefix}_${i}.mp4'\''" >> $concat_file
8 done
9
10 ffmpeg -f concat -safe 0 -i $concat_file -an -c copy "${prefix}_merged.mp4"
11 rm $concat_file
12}; _merge_video'Usage:
merge_video a 5Split a video into segments of 200 ms each,
1ffmpeg -i input.mp4 -c copy -map 0 -segment_time 200 -f segment output_%03d.mp4Convert
.m3u8 (streaming video) to a .mp41ffmpeg -i "$1" -c copy -bsf:a aac_adtstoasc "${1%.m3u8}.mp4"