Used the CSF version a few times yesterday. It worked beautifully for both mp3 & m4a output. When I tried to use today, it would not do anything but create the subfolder and copy coverart to folder. Uninstalled Audible Download Manager. Reinstalled & also install Audible Manager. Removed the AAXSDKWin.dll from AAXtoMP3_CS folder and let it copy again. I turned on Verbose and this is what I got (used ctrl-break to stop after 4 or 5 chapters):
C:\Program Files (x86)\Audible\bin\AAXSDKWin.dll found.
Decode How to Be a Normal Person (Unabridged)
Source Samplerate: 22050, Channels: 2, Bitrate 64004, Duration: 11:07:51
Chapter 1 of 24: 00:00:13.3740000
ffmpeg version N-67205-g61e42c1 Copyright (c) 2000-2014 the FFmpeg developers
built on Oct 26 2014 22:40:18 with gcc 4.9.1 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-zlib
libavutil 54. 11.100 / 54. 11.100
libavcodec 56. 10.100 / 56. 10.100
libavformat 56. 11.100 / 56. 11.100
libavdevice 56. 1.100 / 56. 1.100
libavfilter 5. 2.100 / 5. 2.100
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
Guessed Channel Layout for Input Stream #0.0 : stereo
Input #0, s16le, from 'pipe:0':
Duration: N/A, bitrate: 705 kb/s
Stream #0:0: Audio: pcm_s16le, 22050 Hz, 2 channels, s16, 705 kb/s
[NULL @ 0000000004f643a0] Unable to find a suitable output format for 'None'
None: Invalid argument
Chapter 2 of 24: 00:00:29.2570000
ffmpeg version N-67205-g61e42c1 Copyright (c) 2000-2014 the FFmpeg developers
built on Oct 26 2014 22:40:18 with gcc 4.9.1 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-zlib
libavutil 54. 11.100 / 54. 11.100
libavcodec 56. 10.100 / 56. 10.100
libavformat 56. 11.100 / 56. 11.100
libavdevice 56. 1.100 / 56. 1.100
libavfilter 5. 2.100 / 5. 2.100
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
Guessed Channel Layout for Input Stream #0.0 : stereo
Input #0, s16le, from 'pipe:0':
Duration: N/A, bitrate: 705 kb/s
Stream #0:0: Audio: pcm_s16le, 22050 Hz, 2 channels, s16, 705 kb/s
[NULL @ 0000000002b243a0] Unable to find a suitable output format for 'None'
None: Invalid argument
Thanks for your help! Love this version that saves the individual chapters!!!
Jen
Having the same problem (after having used it once successfully, too).
This would probably be solved just by switcing the format back and forth but in case of other problems delete the application configuration files from your appData folder, typically at C:\Users[your username here]\AppData\Local\AaxToMp3_CSF and try again.
Run it as administrator if you need to add folders or create those folders manually.