From Jacek Pazera:
Pazera Free Audio Extractor is an absolutely free application that extracts audio tracks from video files without loss of sound quality or convert them to MP3, AAC, AC3, WMA, FLAC, M4A, OGG, WV, AIFF or WAV format.
The application supports all major video formats (AVI, FLV, MP4, MKV, MOV, WebM, RM, 3GP, WMV, VOB and many more), moreover, allows the conversion of music files, so it can be used as a universal audio converter. The program has a number of predefined settings (profiles) specially designed for novice users. While more advanced users can customize audio encoding parameters used by encoder: audio bitrate, sampling frequency, audio channels, audio volume. The application allows to extract/convert full audio track or selected range only.
Supported input formats: AVI, MPG, WMV, MKV, MOV, FLV, RMVB, M2TS, VOB, MP4, 3GP, WEBM, DIVX, XVID, MPEG, MPE, ASF, M4V, QT, 3GPP, 3G2, 3GP2, 3GA, MKA, SWF (uncompressed), F4V, F4P, F4A, F4B, DAT, RM, OGM, OGV, AMV, DVR-MS, MTS, TS, HEVC, WTV, WAV, MP3, AC3, AAC, MPC, MPA, MP2, WMA, FLAC, SHN, APE, OGG, OPUS, M4A, WV, AMR, AIFF, VIDEO, M4R, MP4V, MP1, M4B, OGA, DTS, GSM, QCP, RA, VQF, THD, TRUEHD, TRUE-HD, DTSHD, DTS-HD, AVS, EAC3, TTA.
Supported output formats: MP3, AAC (ADTS), WMA, OGG, M4A (AAC/ALAC), AC3, FLAC, WV (WavPack), AIFF, WAV.