$ gst-typefind-0.10 error.mp3 
error.mp3 - FAILED: Could not determine type of stream.

$ file -i error.mp3 
error.mp3: application/octet-stream; charset=binary

$ gst-inspect-0.10 typefindfunctions
Plugin Details:
  Name:			typefindfunctions
  Description:		default typefind functions
  Filename:		/usr/lib/gstreamer-0.10/libgsttypefindfunctions.so
  Version:		0.10.22
  License:		LGPL
  Source module:	gst-plugins-base
  Binary package:	GStreamer Base Plugins (Archlinux)
  Origin URL:		http://www.archlinux.org/

typefindfunctions: application/octet-stream: DS_Store
typefindfunctions: application/msword: doc
typefindfunctions: application/pdf: pdf
typefindfunctions: audio/x-nsf: nsf
typefindfunctions: video/vivo: viv
typefindfunctions: application/x-mmsh: no extensions
typefindfunctions: multipart/x-mixed-replace: no extensions
typefindfunctions: video/x-dirac: no extensions
typefindfunctions: application/x-ms-dos-executable: cpl, msstyles, scr, sys, ocx, exe, dll
typefindfunctions: application/x-ar: a
typefindfunctions: application/x-tar: tar
typefindfunctions: application/x-rar: rar
typefindfunctions: audio/x-wavpack-correction: wvc
typefindfunctions: audio/x-wavpack: wvp, wv
typefindfunctions: audio/x-spc: spc
typefindfunctions: adts_mpeg_stream: aac
typefindfunctions: application/x-executable: no extensions
typefindfunctions: text/x-cmml: no extensions
typefindfunctions: application/x-ogg-skeleton: no extensions
typefindfunctions: audio/x-celt: no extensions
typefindfunctions: audio/x-speex: no extensions
typefindfunctions: application/x-ogm-text: no extensions
typefindfunctions: application/x-ogm-audio: no extensions
typefindfunctions: application/x-ogm-video: no extensions
typefindfunctions: video/x-theora: no extensions
typefindfunctions: audio/x-vorbis: no extensions
typefindfunctions: audio/x-flac: flac
typefindfunctions: application/x-kate: no extensions
typefindfunctions: application/x-compress: Z
typefindfunctions: application/zip: zip
typefindfunctions: application/x-gzip: gz
typefindfunctions: application/x-bzip: bz2
typefindfunctions: image/x-sun-raster: ras
typefindfunctions: image/x-xpixmap: xpm
typefindfunctions: image/x-jng: jng
typefindfunctions: video/x-mng: mng
typefindfunctions: image/x-xcf: xcf
typefindfunctions: audio/x-sid: sid
typefindfunctions: audio/iLBC-sh: ilbc
typefindfunctions: audio/x-amr-wb-sh: amr
typefindfunctions: audio/x-amr-nb-sh: amr
typefindfunctions: video/x-dv: dif, dv
typefindfunctions: video/x-mve: mve
typefindfunctions: application/mxf: mxf
typefindfunctions: video/x-matroska: mka, mkv
typefindfunctions: image/tiff: tiff, tif
typefindfunctions: image/bmp: bmp
typefindfunctions: image/png: png
typefindfunctions: image/gif: gif
typefindfunctions: image/jpeg: jpeg, jpe, jpg
typefindfunctions: application/x-ape: ape
typefindfunctions: audio/x-shorten: shn
typefindfunctions: audio/x-w64: w64
typefindfunctions: audio/x-ircam: sf
typefindfunctions: audio/x-sds: sds
typefindfunctions: audio/x-voc: voc
typefindfunctions: audio/x-nist: nist
typefindfunctions: audio/x-paris: paf
typefindfunctions: audio/x-svx: svx, iff
typefindfunctions: audio/x-aiff: aifc, aif, aiff
typefindfunctions: audio/x-wav: wav
typefindfunctions: application/xml: xml
typefindfunctions: application/smil: smil
typefindfunctions: application/sdp: sdp
typefindfunctions: text/uri-list: ram
typefindfunctions: text/plain: txt
typefindfunctions: video/x-flv: flv
typefindfunctions: application/x-shockwave-flash: swfl, swf
typefindfunctions: application/x-pn-realaudio: rmvb, rm, ram, ra
typefindfunctions: application/vnd.rn-realmedia: rmvb, rm, ram, ra
typefindfunctions: text/html: html, htm
typefindfunctions: video/mj2: mj2
typefindfunctions: image/jp2: jp2
typefindfunctions: image/x-quicktime: qti, qtif, qif
typefindfunctions: video/quicktime: mov
typefindfunctions: application/x-3gp: 3gp
typefindfunctions: audio/x-m4a: m4a
typefindfunctions: video/x-nuv: nuv
typefindfunctions: video/x-h264: 264, x264, h264
typefindfunctions: video/mpeg4: m4v
typefindfunctions: video/mpeg-elementary: mpg, mpeg, mpv
typefindfunctions: application/ogg: ogm, ogg, anx
typefindfunctions: video/mpegts: ts
typefindfunctions: video/mpeg-sys: mpg, mpeg, mpe
typefindfunctions: audio/x-ac3: ac3
typefindfunctions: audio/mpeg: mpga, mp1, mp2, mp3
typefindfunctions: audio/x-mod: xm, ult, stx, stm, s3m, sam, okt, mtm, mod, med, it, imf, far, gdm, dsm, amf, 669
typefindfunctions: audio/x-ttafile: tta
typefindfunctions: application/x-apetag: wv, mpc, ape
typefindfunctions: application/x-id3v1: tta, flac, ogg, mpga, mp1, mp2, mp3
typefindfunctions: application/x-id3v2: tta, flac, ogg, mpga, mp1, mp2, mp3
typefindfunctions: video/x-fli: fli, flc
typefindfunctions: audio/midi: midi, mid
typefindfunctions: audio/x-imelody: imelody, ime, imy
typefindfunctions: video/x-vcd: dat
typefindfunctions: video/x-cdxa: dat
typefindfunctions: audio/qcelp: qcp
typefindfunctions: video/x-msvideo: avi
typefindfunctions: audio/x-au: snd, au
typefindfunctions: audio/x-musepack: mp+, mpp, mpc
typefindfunctions: video/x-ms-asf: wmv, wma, wm, asf

  101 features:
  +-- 101 types