My digital audio collection is mostly in ogg and flac format for better quality/file size and the player can't handle them. I tried to find a nice solution to mass convert files from ogg/flac to mp3 but none of them were satisfactory so i wrote my own script:
# Convert flac & ogg audio to low quality mp3 for mobile playing.
# By Ville Ranki
find -type f -name "*.flac" -o -name "*.ogg" | while read file
outfile=`echo $file | sed 's/\.[^\.]*$/.mp3/'`
echo "Converting $file to $outfile"
gst-launch-1.0 filesrc location="$file" ! decodebin ! audioconvert ! lamemp3enc target=quality quality=4 ! id3v2mux ! filesink location="$outfile"
if [ -f "$outfile" ];
echo "Removing original $file"
echo "Error: File $outfile was not created."
This script will find recursively all files in current directory, convert them to mp3's (while preserving id3 tags) and delete the original files. It preserves directories as they are - my car player should be able to browse by directory although i haven't figured out how to do so.
I use it by copying wanted music to a temporary directory, run the script in the directory and copy the results to usb stick or other media.
Make sure you have all the commands installed before running the script, such as gst-launch-0.10. Also don't run the script where the original collection is or you'll lose it. Copy files somewhere else first.
I hope this is helpful for others with the same problem.
(Updated 23.7.2015 for gst-launch-1.0 and simplified the script at the same time)