ffmpeg - the media conversion toolbox

1

Expanded Bash Functions with Most Types of Multimedia Support (infosec.pub)

submitted 2 days ago by Willie169@infosec.pub to c/ffmpeg@programming.dev

1 comment fedilink

I write this to convert my old, multiple GiB, multimedia files to formats that are smaller in size and royalty free.

remove_extension() {
  sed -E 's/^(.+)\.[^.]+$/\1/'
}

get_extension() {
  sed -E '/^\.?[^.]+$/d; s/^.+\.([^.]*)$/\1/'
}

ffmpeg_av1_opus() {
  if [ "$#" -lt 4 ]; then
    return
  fi
  ffmpeg -n -i "$4" -c:v libsvtav1 -preset "$1" -crf "$2" -c:a libopus -vbr:a 1 -b:a "$3" "${5:-"$(echo "$4" | remove_extension)_ffmpeg_av1_$1_$2_opus_$3.mkv"}"
}

ffmpeg_av1_lossless_flac() {
  if [ "$#" -eq 0 ]; then
    return
  fi
  ffmpeg -n -i "$1" -c:v libsvtav1 -svtav1-params lossless=1 -preset -2 -c:a flac "${2:-"$(echo "$1" | remove_extension)_ffmpeg_av1_lossless_flac.mkv"}"
}

ffmpeg_opus() {
  if [ "$#" -lt 2 ]; then
    return
  fi
  ffmpeg -n -i "$2" -c:a libopus -vbr:a 1 -b:a "$1" "${3:-"$(echo "$2" | remove_extension)_ffmpeg_opus_$1.opus"}"
}

ffmpeg_flac() {
  if [ "$#" -eq 0 ]; then
    return
  fi
  ffmpeg -n -i "$1" -c:a flac "${2:-"$(echo "$1" | remove_extension)_ffmpeg_flac.flac"}"
}

ffmpeg_segment() {
  if [ "$#" -lt 2 ]; then
    return
  fi
  ffmpeg -n -i "$2" -c copy -map 0 -segment_time "$1" -f segment -reset_timestamps 1 "${3:-"$(echo "$2" | remove_extension)_ffmpeg_%04d.$(echo "$2" | get_extension)"}"
}

ffmpeg_concat_auto() {
  local files=()
  if [ "$#" -eq 0 ]; then
    for f in *; do
      test -f "$f" && files+=("$f")
    done
  else
    files=("$@")
  fi
  ffmpeg -n -f concat -safe 0 -i <(printf "file '$PWD/%s'\n" "${files[@]}") -c copy "$(echo "${files[0]}" | remove_extension | sed -E 's/_ffmpeg_[0-9]+$//').$(echo "${files[0]}" | get_extension)"
}

ffmpeg_concat() {
  if [ "$#" -lt 2 ]; then
    return
  fi
  ffmpeg -n -f concat -safe 0 -i <(printf "file '$PWD/%s'\n" "${@:2}") -c copy "$1"
}

echo_non_ffmpeg() {
  while IFS= read -r -d '' f; do
    case "$f" in
      *ffmpeg_*) ;;
      *)
        echo "$f"
        ;;
    esac
  done < <(find . -type f -print0)
}

remove_non_ffmpeg() {
  while IFS= read -r -d '' f; do
    case "$f" in
      *ffmpeg_*) ;;
      *)
        rm -f -- "$f"
        ;;
    esac
  done < <(find . -type f -print0)
}

echo_ffmpeg() {
  while IFS= read -r -d '' f; do
    case "$f" in
      *ffmpeg_*)
        echo "$f"
        ;;
      *) ;;
    esac
  done < <(find . -type f -print0)
}

remove_ffmpeg() {
  while IFS= read -r -d '' f; do
    case "$f" in
      *ffmpeg_*)
        rm -f -- "$f"
        ;;
      *) ;;
    esac
  done < <(find . -type f -print0)
}

jxl_lossy() {
  if [ "$#" -lt 2 ]; then
    return
  fi
  cjxl -j 0 -e 10 -d "$1" "$2" "${3:-"$(echo "$2" | remove_extension).jxl"}"
}

jxl_lossless() {
  if [ "$#" -eq 0 ]; then
    return
  fi
  cjxl -j 1 -e 10 -d 0 "$1" "${2:-"$(echo "$1" | remove_extension).jxl"}"
}

multimedia_convert() {
  (
    shopt -s globstar nullglob
    for f in **/*; do
      [[ -f $f ]] || continue
      local file=${f##*/}
      local dir=${f%/*}
      [[ $dir == "$f" ]] && dir=.
      case ${file,,} in
        *.gif)
          if [[ ${file##*.} != gif ]]; then
            if [[ -e "${f%.*}.gif" ]]; then
              printf 'Skipping: output exists: %s\n' "$f" >&2
              continue
            fi
            mv -- "$f" "${f%.*}.gif"
          fi
          ;;
        *.flac)
          if [[ ${file##*.} != flac ]]; then
            if [[ -e "${f%.*}.flac" ]]; then
              printf 'Skipping: output exists: %s\n' "$f" >&2
              continue
            fi
            mv -- "$f" "${f%.*}.flac"
          fi
          ;;
        *.jpg | *.jpeg | *.png)
          local jxl="${file%.*}.jxl"
          if [[ -e "$dir/$jxl" ]]; then
            printf 'Skipping: output exists: %s\n' "$f" >&2
            continue
          fi
          (
            cd "$dir" &&
              jxl_lossy 1 "./$file" "./$jxl" &&
              rm -- "$file"
          )
          ;;
        *.avif | *.bmp | *.heic | *.ico | *.jp2 | *.tif | *.webp)
          local png="${file%.*}.png"
          if [[ -e "$dir/$png" ]]; then
            printf 'Skipping: intermediate png exists: %s\n' "$f" >&2
            continue
          fi
          local jxl="${file%.*}.jxl"
          if [[ -e "$dir/$jxl" ]]; then
            printf 'Skipping: output exists: %s\n' "$f" >&2
            continue
          fi
          (
            cd "$dir" &&
              magick "./$file" "./$png" && {
              jxl_lossy 1 "./$png" "./$jxl" &&
                rm -- "$file" ||
                true
            } &&
              rm -f -- "$png"
          )
          ;;
        *.3gp | *.mov | *.vob | *.wmv)
          (
            cd "$dir" &&
              ffmpeg_av1_opus 4 40 24k "./$file" &&
              rm -- "$file"
          )
          ;;
        *.avi | *.mkv | *.mp4)
          (
            cd "$dir" &&
              ffmpeg_av1_opus 4 32 72k "./$file" &&
              rm -- "$file"
          )
          ;;
        *.aac | *.mp3 | *.m4a | *.ogg)
          (
            cd "$dir" &&
              ffmpeg_opus 96k "./$file" &&
              rm -- "$file"
          )
          ;;
        *.wav)
          (
            cd "$dir" &&
              ffmpeg_flac "./$file" &&
              rm -- "$file"
          )
          ;;
        *)
          continue
          ;;
      esac
    done
  )
}

2

My FFmpeg Bash Functions (infosec.pub)

submitted 5 days ago* (last edited 3 days ago) by Willie169@infosec.pub to c/ffmpeg@programming.dev

5 comments fedilink

remove_extension() {
  sed -E 's/^(.+)\.[^.]+$/\1/'
}

get_extension() {
  sed -E '/^\.?[^.]+$/d; s/^.+\.([^.]*)$/\1/'
}

ffmpeg_av1_opus() {
  if [ "$#" -lt 4 ]; then
    return
  fi
  ffmpeg -i "$4" -c:v libsvtav1 -preset "$1" -crf "$2" -c:a libopus -vbr:a 1 -b:a "$3" "${5:-"$(echo "$4" | remove_extension)_ffmpeg_av1_$1_$2_opus_$3.mkv"}"
}

ffmpeg_av1_lossless_flac() {
  if [ "$#" -eq 0 ]; then
    return
  fi
  ffmpeg -i "$1" -c:v libsvtav1 -svtav1-params lossless=1 -preset -2 -c:a flac "${2:-"$(echo "$1" | remove_extension)_ffmpeg_av1_lossless_flac.mkv"}"
}

ffmpeg_opus() {
  if [ "$#" -lt 2 ]; then
    return
  fi
  ffmpeg -i "$2" -c:a libopus -vbr:a 1 -b:a "$1" "${3:-"$(echo "$2" | remove_extension)_ffmpeg_opus_$1.opus"}"
}

ffmpeg_flac() {
  if [ "$#" -eq 0 ]; then
    return
  fi
  ffmpeg -i "$1" -c:a flac "${2:-"$(echo "$1" | remove_extension)_ffmpeg_flac.flac"}"
}

ffmpeg_segment() {
  if [ "$#" -lt 2 ]; then
    return
  fi
  ffmpeg -i "$2" -c copy -map 0 -segment_time "$1" -f segment -reset_timestamps 1 "${3:-"$(echo "$2" | remove_extension)_ffmpeg_%04d.$(echo "$2" | get_extension)"}"
}

ffmpeg_concat_auto() {
  local files=()
  if [ "$#" -eq 0 ]; then
    for f in *; do
      test -f "$f" && files+=("$f")
    done
  else
    files=("$@")
  fi
  ffmpeg -f concat -safe 0 -i <(printf "file '$PWD/%s'\n" "${files[@]}") -c copy "$(echo "${files[0]}" | remove_extension | sed -E 's/_ffmpeg_[0-9]+$//').$(echo "${files[0]}" | get_extension)"
}

ffmpeg_concat() {
  if [ "$#" -lt 2 ]; then
    return
  fi
  ffmpeg -f concat -safe 0 -i <(printf "file '$PWD/%s'\n" "${@:2}") -c copy "$1"
}

echo_non_ffmpeg() {
  while IFS= read -r -d '' f; do
    case "$f" in
      *ffmpeg_*) ;;
      *)
        echo "$f"
        ;;
    esac
  done < <(find . -type f -print0)
}

remove_non_ffmpeg() {
  while IFS= read -r -d '' f; do
    case "$f" in
      *ffmpeg_*) ;;
      *)
        rm -f "$f"
        ;;
    esac
  done < <(find . -type f -print0)
}

echo_ffmpeg() {
  while IFS= read -r -d '' f; do
    case "$f" in
      *ffmpeg_*)
        echo "$f"
        ;;
      *) ;;
    esac
  done < <(find . -type f -print0)
}

remove_ffmpeg() {
  while IFS= read -r -d '' f; do
    case "$f" in
      *ffmpeg_*)
        rm -f "$f"
        ;;
      *) ;;
    esac
  done < <(find . -type f -print0)
}

mv_space_underscore() {
  while IFS= read -r -d '' f; do
    new="${f// /_}"
    [[ -e "$new" ]] && {
      echo "skipping '$f', '$new' exists"
      continue
    }
    mv -- "$f" "$new"
  done < <(find . -depth -name '* *' -print0)
}

mv_space_hyphen() {
  while IFS= read -r -d '' f; do
    new="${f// /-}"
    [[ -e "$new" ]] && {
      echo "skipping '$f', '$new' exists"
      continue
    }
    mv -- "$f" "$new"
  done < <(find . -depth -name '* *' -print0)
}

Edit: Add -vbr:a 1 to opus, thanks to exdor.

3

Welcome! Introduction (programming.dev)

submitted 5 days ago* by exdor@programming.dev [M] to c/ffmpeg@programming.dev

comment fedilink

Hi all!

Only after I made an account on this instance I saw that there already is a community on lemmy.world. many instances might defederate, so this one is useful.

My motivation: I use / have used ffmpeg for

encoding any audio to opus, variable bitrate (there are 2 modes, not sure why and mode 1 seems to be better)
converting stereo audio to mono, duplicated to 2 channels
cutting audio and video
encoding any kind of video to AV1, using svt_av1 (the software encoder which sadly produces way better results than qsv_av1 on my Intel Arc)
extracting screenshots from video
converting multiple images into a video for timelapse recordings
converting videos to animated images (webp)
add metadata to videos and audios
concatenate audiobooks in several folders to a single file including chapter metadata
...

I will post all my scripts here in some time and hope for an engaging community to exchange tips, parameters etc! Ffmpeg is not very easy to use but incredibly efficient!

lemmy:	0.19.20
mlmym (mschae):	26.3.4

posts