LIST

ffmpeg -codecs # list all codecs
ffmpeg -encoders # list all encoders
ffmpeg -decoders # lis tall decoders
ffmpeg -formats # list all formats

TRIM

ffmpeg -accurate_seek -ss $SECONDS -i $FILE -frames:v 1 -quality 100 image.png # Extract frame to image
ffmpeg -i "${file}" -ss 00:00:30 -t 00:00:05 -codec copy ${fileout} # Extract a part a video from -ss for a duration -t
ffmpeg -i "${file}" -ss 00:00:00 -to 00:56:33 -c copy "${fileout}" # trim outside of -ss & -to
ffmpeg -f concat -safe 0 -i <(echo -e "file \"${file1}\"\nfile \"${file2}\"") -c copy ${fileout}
ffmpeg -i "concat:${file1}|${file2}" -codec copy "${fileout}" # join files

AUDIO & VIDEO

ffmpeg -i "${file}" -c:v libx265 -codec:a libopus -b:a 64k -vbr on -compression_level 10 "${path}/${file%.*}.mp4"

batch to encode audio & video

path="/ext/shared/Videos/ffmpeg" && path2="/tmp/ffmpeg-batch-$(date +%s)" && while read file; do echo "ffmpeg -i \"${file}\" -c:v libx265 -codec:a libopus -b:a 64k -vbr on -compression_level 10 \"${file%.*}-resized.mp4\"" >> "${path2}"; done < <(find "${path}" -name "*.*") && chmod +x "${path2}" && echo "Launch: ${path2}"

batch to encode audio video with crop & scale

crop="W:H:X:Y"
scale="800x720"
scale="800:-1"
path="/home/nikita/Downloads/.tmp/ffmpeg" && path2="/tmp/ffmpeg-batch-$(date +%s)" && while read file; do echo "ffmpeg -i \"${file}\" -filter:v crop=${crop},scale=${scale} -c:v libx265 -codec:a libopus -b:a 64k -vbr on -compression_level 10 \"${file%.*}-resized.mp4\"" >> "${path2}"; done < <(find "${path}" -name "*.webm") && chmod +x "${path2}" && echo "Launch: ${path2}"

AUDIO

# replace audio in video
ffmpeg -i "$file" -i "${file%.mp4}.opus" -c:v copy -c:a copy -map 0:v:0 -map 1:a:0 "${file%.mp4}-audio.mp4"

# batch to replace audio
path="/home/nikita/Downloads/.tmp/ffmpeg" && path2="/tmp/ffmpeg-batch-$(date +%s)" && while read file; do echo "ffmpeg -i \"${file}\" -i \"${file%.mp4}.opus\" -c:v copy -c:a copy -map 0:v:0 -map 1:a:0 \"${file%.mp4}-audio.mp4\"" >> "${path2}"; done < <(find "${path}" -name "*.mp4") && chmod +x "${path2}" && echo "Launch: ${path2}"

# compress audio
ffmpeg -i "$file" -codec:a libopus -b:a 64k -vbr on -compression_level 10 "${file%.*}.opus"

# batch to compress audio
path="/home/nikita/Downloads/.tmp/ffmpeg" && path2="/tmp/ffmpeg-batch-$(date +%s)" && while read file; do echo "ffmpeg -i \"$file\" -c:v copy -codec:a libopus -b:a 64k -vbr on -compression_level 10 \"${file%.mp4}-audio.mp4\"" >> "${path2}"; done < <(find "${path}" -name "*.mp4") && chmod +x "${path2}" && echo "Launch: ${path2}"

ENCODE

ffmpeg -i "$file" -vn -acodec copy $file_out # extract audio
ffmpeg -i "$file" -filter:v scale=720:-1 -c:a copy "$file_out" # resize video, -1 asks to ffmpeg to keep proportion
ffmpeg -i "$file" -filter:v crop=w:h:x:y -c:a copy "$file_out" # crop to w-width:h-height:x-left:y-top, passthru audio
ffmpeg -i "$file" -filter:v crop=w:h:x:y -c:v libx265 -c:a copy "$file_out" # crop & encode encode with h265, passthru audio
ffmpeg -i "$file" -filter:v "crop=w:h:x:y,scale=w_max:h_max530" -c:v libx265 -c:a copy "$file_out" # crop > scale to max w_max/h_max (-1 keeps proportion), encode h265, passthru audio

OTHERS

ffmpeg -i $file -hide_banner # info
ffmpeg -accurate_seek -ss $SECONDS -i $FILE -frames:v 1 image.bmp # Extract frame to image

FFPROBE

gt info from file

ffprobe -i $file

examples

create batch & launch it to crope, scale & encode files from file list

crop="W:H:X:Y"
scale="800x720"
scale="800:-1"
path="/home/nikita/_new/ffmpeg" && path2="/tmp/ffmpeg-batch-$(date +%s)" && while read file; do name="${file##*/}"; path="${file%/*}"; echo "ffmpeg -i \"${file}\" -filter:v "crop=${crop},scale=${scale}" -c:v libx265 -c:a copy \"${path}/${name%.*}-resized.mp4\"" >> "${path2}"; done < <(find "${path}" -name "*.mp4") && chmod +x "${path2}" && echo "Launch: ${path2}"

create batch & launch it to only encode files searching

path="/home/nikita/_new/ffmpeg" && path2="/tmp/ffmpeg-batch-$(date +%s)" && while read file; do name="${file##*/}"; path="${file%/*}"; echo "ffmpeg -i \"${file}\" -c:v libx265 -c:a copy \"${path}/${name%.*}.mp4\"" >> "${path2}"; done < <(find "${path}" -name "*.mkv") && chmod +x "${path2}" && echo "Launch: ${path2}"

AUDACITY

Export /Export Audio/(external program)

ffmpeg -i - -codec:a libopus -b:a 64k -vbr on -compression_level 10 "%f" # whithout space in path file