Convert every .mp4 file in the current directory to OGG Vorbis and place the resulting .ogg files in a sibling folder versioned by date-time

transcode-audio.fish

#!/usr/bin/env fish

# ------------------------------------------------------------
# Convert every .mp4 file in the current directory to OGG Vorbis
# and place the resulting .ogg files in a sibling folder
# called "archivos-audio".
# ------------------------------------------------------------

# 1. Create the destination folder if it doesn't exist
set timestamp (date +"%Y-%m-%dT%H%M%S")
set dest "converted-audio-$timestamp"
if not test -d $dest
    mkdir $dest
end

# 2. Loop over all .webm files (non‑recursive)
for src in *.mp4
    # Skip if the glob didn't match any files
    if not test -e $src
        continue
    end

    # Build the output filename (same base name, .ogg extension)
    set base (basename "$src" .mp4)
    set out "$dest/$base.ogg"

    # 3. Run ffmpeg: copy video away, copy audio as is, in case audio
    #    is already in a format supported by ogg, eg vorbis or opus.
    #    If you want to encode audio to Vorbis -q:a 5 gives a good 
    #    quality‑size trade‑off (0‑10 scale). To transcode use ffmpeg 
    #    as this:
    #    ffmpeg -i "$src" -c:a libvorbis -q:a 5 -vn "$out"
    ffmpeg -i "$src" -c:a copy -vn "$out"

    # Optional: print a short status line
    echo "Converted $src → $out"
end

echo "All done. OGG files are in ./$dest"