video-editing

# Video Editing Video manipulation and conversion using ffmpeg. ## Get video info ```bash ffprobe -v quiet -print_format json -show_format -show_streams input.mp4 ``` ## Trim video ```bash # Trim from 00:01:30 for 60 seconds ffmpeg -i input.mp4 -ss 00:01:30 -t 60 -c copy trimmed.mp4 # Trim from start to specific end time ffmpeg -i input.mp4 -ss 00:00:00 -to 00:02:00 -c copy trimmed.mp4 ``` ## Convert format ```bash # MP4 to WebM ffmpeg -i input.mp4 -c:v libvpx-vp9 -c:a libopus output.webm # MOV to MP4 ffmpeg -i input.mov -c:v libx264 -c:a aac output.mp4 # AVI to MP4 ffmpeg -i input.avi -c:v libx264 -c:a aac -movflags +faststart output.mp4 ``` ## Extract audio ```bash # Extract audio as MP3 ffmpeg -i input.mp4 -vn -acodec libmp3lame -q:a 2 audio.mp3 # Extract audio as WAV ffmpeg -i input.mp4 -vn -acodec pcm_s16le audio.wav # Extract audio as AAC ffmpeg -i input.mp4 -vn -acodec aac audio.m4a ``` ## Create thumbnail ```bash # Extract a single frame at 10 seconds ffmpeg -i input.mp4 -ss 00:00:10 -frames:v 1 thumbnail.jpg # Create a thumbnail grid (4x4) ffmpeg -i input.mp4 -frames 1 -vf "select=not(mod(n\,100)),scale=320:240,tile=4x4" grid.jpg ``` ## Resize video ```bash # Resize to 1280x720 ffmpeg -i input.mp4 -vf scale=1280:720 -c:a copy resized.mp4 # Resize keeping aspect ratio (width 1280, auto height) ffmpeg -i input.mp4 -vf scale=1280:-2 -c:a copy resized.mp4 # Resize to 50% ffmpeg -i input.mp4 -vf scale=iw/2:ih/2 -c:a copy half.mp4 ``` ## Add watermark ```bash # Add image watermark (bottom-right corner) ffmpeg -i input.mp4 -i watermark.png -filter_complex "overlay=W-w-10:H-h-10" watermarked.mp4 # Add text watermark ffmpeg -i input.mp4 -vf "drawtext=text='Copyright 2025':fontsize=24:fontcolor=white:x=W-tw-10:y=H-th-10" watermarked.mp4 ``` ## Concatenate videos ```bash # Create a file list printf "file '%s'\n" part1.mp4 part2.mp4 part3.mp4 > filelist.txt # Concatenate using the file list ffmpeg -f concat -safe 0 -i filelist.txt -c copy output.mp4 ``` ## Extract frames ```bash # Extract all frames as images ffmpeg -i input.mp4 frames/frame_%04d.png # Extract 1 frame per second ffmpeg -i input.mp4 -vf fps=1 frames/frame_%04d.png # Extract frames at specific interval (every 5 seconds) ffmpeg -i input.mp4 -vf fps=1/5 frames/frame_%04d.png ``` ## Compress video ```bash # Compress with CRF (lower = better quality, 18-28 typical) ffmpeg -i input.mp4 -c:v libx264 -crf 23 -preset medium -c:a aac -b:a 128k compressed.mp4 # Aggressive compression for smaller file ffmpeg -i input.mp4 -c:v libx264 -crf 28 -preset slow -c:a aac -b:a 96k small.mp4 # Two-pass encoding for target file size ffmpeg -i input.mp4 -c:v libx264 -b:v 1M -pass 1 -f null /dev/null ffmpeg -i input.mp4 -c:v libx264 -b:v 1M -pass 2 -c:a aac -b:a 128k output.mp4 ```