[SOLVED] Converting Amazon .m4a music files to .wav or .mp3

Here's the complete output

chris@localhost:~/Music/Convert/AC_DC/Highway_to_Hell$ ffmpeg -i ATVPDKIKX0DER_B00O6L3BCI_.m4a -acodec mp3 -ac 2 -ab 192k ATVPDKIKX0DER_B00O6L3BCI.mp3
ffmpeg version 3.4.4-0ubuntu0.18.04.1 Copyright (c) 2000-2018 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.3.0-16ubuntu3)
  configuration: --prefix=/usr --extra-version=0ubuntu0.18.04.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  WARNING: library configuration mismatch
  avcodec     configuration: --prefix=/usr --extra-version=0ubuntu0.18.04.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared --enable-version3 --disable-doc --disable-programs --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libtesseract --enable-libvo_amrwbenc
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x564e2fec2820] Format mov,mp4,m4a,3gp,3g2,mj2 detected only with low score of 1, misdetection possible!
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x564e2fec2820] moov atom not found
ATVPDKIKX0DER_B00O6L3BCI_.m4a: Invalid data found when processing input

Dumb question. Did you consider that these files might be protected by DRM? Maybe they aren't normal .m4a. You need to download the .mp3 from the music you purchased?

Originally Posted by Toadman Here's the complete output chris@localhost:~/Music/Convert/AC_DC/Highway_to_Hell$ ffmpeg -i ATVPDKIKX0DER_B00O6L3BCI_.m4a -acodec mp3 -ac 2 -ab 192k ATVPDKIKX0DER_B00O6L3BCI.mp3 [mov,mp4,m4a,3gp,3g2,mj2 @ 0x564e2fec2820] Format mov,mp4,m4a,3gp,3g2,mj2 detected only with low score of 1, misdetection possible! [mov,mp4,m4a,3gp,3g2,mj2 @ 0x564e2fec2820] moov atom not found ATVPDKIKX0DER_B00O6L3BCI_.m4a: Invalid data found when processing input

It certainly looks like these files are in a proprietary format, maybe encrypted, so that Linux tools cannot handle them.
The strange filename, the result of file, all point to an unknown binary format.

Originally Posted by ehartman It certainly looks like these files are in a proprietary format, maybe encrypted, so that Linux tools cannot handle them. The strange filename, the result of file, all point to an unknown binary format.

My original goal in this was to be able to download music from my Amazon Music Unlimited account, convert to MP3 and put on my phone so that when we make a road trip I can play it as I do other music on my phone through Android Auto. This morning I went digging through some more Q&A about Amazon's Music Unlimited and their format. I pulled up some info about apps for Android Auto and found that the Amazon Music app can be read by Android Auto. Since I had it on my phone already I went out to the car and tried it. Sure enough all the 'stations' I'd added as well as my downloaded tracks were able to be played with no problem. No conversion needed.

I feel like such an ass! If I would have done more Googling I've had discovered that I can directly access the music app from the car. I can also access Pandora and others.

I apologize for wasting everyone's time on this.

Originally Posted by Toadman My original goal in this was to be able to download music from my Amazon Music Unlimited account, convert to MP3 and put on my phone so that when we make a road trip I can play it as I do other music on my phone through Android Auto. This morning I went digging through some more Q&A about Amazon's Music Unlimited and their format. I pulled up some info about apps for Android Auto and found that the Amazon Music app can be read by Android Auto. Since I had it on my phone already I went out to the car and tried it. Sure enough all the 'stations' I'd added as well as my downloaded tracks were able to be played with no problem. No conversion needed.

Ahahah, at least glad you don't have an issue anymore ^^
Can you mark this thread as [SOLVED] please?

Originally Posted by Toadman Here's the complete output chris@localhost:~/Music/Convert/AC_DC/Highway_to_Hell$ ffmpeg -i ATVPDKIKX0DER_B00O6L3BCI_.m4a -acodec mp3 -ac 2 -ab 192k ATVPDKIKX0DER_B00O6L3BCI.mp3 ffmpeg version 3.4.4-0ubuntu0.18.04.1 Copyright (c) 2000-2018 the FFmpeg developers built with gcc 7 (Ubuntu 7.3.0-16ubuntu3) configuration: --prefix=/usr --extra-version=0ubuntu0.18.04.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared WARNING: library configuration mismatch avcodec configuration: --prefix=/usr --extra-version=0ubuntu0.18.04.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared --enable-version3 --disable-doc --disable-programs --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libtesseract --enable-libvo_amrwbenc libavutil 55. 78.100 / 55. 78.100 libavcodec 57.107.100 / 57.107.100 libavformat 57. 83.100 / 57. 83.100 libavdevice 57. 10.100 / 57. 10.100 libavfilter 6.107.100 / 6.107.100 libavresample 3. 7. 0 / 3. 7. 0 libswscale 4. 8.100 / 4. 8.100 libswresample 2. 9.100 / 2. 9.100 libpostproc 54. 7.100 / 54. 7.100 [mov,mp4,m4a,3gp,3g2,mj2 @ 0x564e2fec2820] Format mov,mp4,m4a,3gp,3g2,mj2 detected only with low score of 1, misdetection possible! [mov,mp4,m4a,3gp,3g2,mj2 @ 0x564e2fec2820] moov atom not found ATVPDKIKX0DER_B00O6L3BCI_.m4a: Invalid data found when processing input

Out of curiosity, is the following better?

ffmpeg -f m4a -i ATVPDKIKX0DER_B00O6L3BCI_.m4a -acodec mp3 -ac 2 -ab 192k ATVPDKIKX0DER_B00O6L3BCI.mp3

EDIT: actually, your files seems corrupted to me. There are some resources on the Internet like the following about "moov atom not found": http://muzso.hu/2012/11/14/how-to-fi...atom-not-found. However, there doesn't seem to be a lot of solutions for you, except a so-called "Grau's Video Repair Tool" (I don't know what it's worth though...).

A little, these are the last two lines

[mov,mp4,m4a,3gp,3g2,mj2 @ 0x5645a410e820] moov atom not found
ATVPDKIKX0DER_B00O6L3BCI_.m4a: Invalid data found when processing input

I forgot to mark it solved yesterday, doing so now.

^ OK, see my EDIT in post#20

I'm pretty much convinced now that these are possibly DRM protected or as you suggest when downloaded they become corrupted. However, since I discovered that I can just add the tracks to a playlist and then play with the Amazon Music app through Android Auto I don't need any type of conversion. I should have done more digging before asking which was wrong on my part.