mp3wrap file not playable I combined six MP3 files, with filenames starting with 0, into one MP3 with the following command under Debian Wheezy:

$ mp3wrap -v output.mp3 0*


Using file on output.mp3 confirmed that it was an MP3 file. The file plays using mocp, but will not play on a Samsung Galaxy S3 with either the built-in player or an external player. How can I solve this?
Had the same problem with files merged with mp3wrap on my Nexus. The only working solution, I found is to use ffmpeg as a merge tool.

How to

This will concatenate two mp3 files, and the resulting metadata will be that of the first file:

ffmpeg -i "concat:file1.mp3|file2.mp3" -acodec copy output.mp3


This is because, for ffmpeg, the whole "concat:" part is a single "input file", and its metadata will be of the first concatenated file. If you want to use metadata from the second file instead, you have to add it as a dummy input file and map its metadata to that of the output:

ffmpeg -i "concat:file1.mp3|file2.mp3" -i file2.mp3 -acodec copy test.mp3 -map_metadata 0:1


If you want to construct your metadata from the two metadatas, you'll have to do it by hand. You can dump a file's metadata with

ffmpeg -i file1.mp3 -f ffmetadata file1.metadata


After dumping both metadatas and constructing new metadata, you can add it to the output file with -metadata, and you can disable metadata copying by setting a -map_metadata mapping from a negative input file number. This sets a name value and no other metadata:

ffmpeg -i "concat:file1.mp3|file2.mp3" -acodec copy -metadata "title=Some Song" test.mp3 -map_metadata 0:-1


Above instructions were copied from superuser.com answer from a similar question