Actually we support reading of almost all audio and video formats.
But in case you need a list:
| Extension | Description |
| 3g2 | 3GP2 format |
| 3gp | 3GP format |
| 4xm | 4X Technologies format |
| a64 | a64 - video for Commodore 64 |
| aac | raw ADTS AAC |
| ac3 | raw AC-3 |
| act | ACT Voice file format |
| adf | Artworx Data Format |
| adts | ADTS AAC |
| adx | CRI ADX |
| aea | MD STUDIO audio |
| aiff | Audio IFF |
| alaw | PCM A-law format |
| alsa | ALSA audio output |
| amr | 3GPP AMR file format |
| anm | Deluxe Paint Animation |
| apc | CRYO APC format |
| ape | Monkey's Audio |
| asf | ASF format |
| asf_stream | ASF format |
| ass | Advanced SubStation Alpha subtitle |
| au | SUN AU format |
| avi | AVI format |
| avm2 | Flash 9 (AVM2) format |
| avs | AVS format |
| bethsoftvid | Bethesda Softworks VID format |
| bfi | Brute Force & Ignorance |
| bin | Binary text |
| bink | Bink |
| bit | G.729 BIT file format |
| bmv | Discworld II BMV |
| c93 | Interplay C93 |
| caf | Apple Core Audio Format |
| cavsvideo | raw Chinese AVS video |
| cdg | CD Graphics Format |
| cdxl | Commodore CDXL video format |
| crc | CRC testing format |
| daud | D-Cinema audio format |
| dfa | Chronomaster DFA |
| dirac | raw Dirac |
| dnxhd | raw DNxHD (SMPTE VC-3) |
| dsicin | Delphine Software International CIN |
| dts | raw DTS |
| dv | DV video format |
| dv1394 | DV1394 A/V grab |
| dvd | MPEG-2 PS format (DVD VOB) |
| dxa | DXA |
| ea | Electronic Arts Multimedia Format |
| ea_cdata | Electronic Arts cdata |
| eac3 | raw E-AC-3 |
| f32be | PCM 32 bit floating-point big-endian |
| f32le | PCM 32 bit floating-point little-endian |
| f64be | PCM 64 bit floating-point big-endian |
| f64le | PCM 64 bit floating-point little-endian |
| fbdev | Linux framebuffer |
| ffm | FFM (FFserver live feed) |
| ffmetadata | FFmpeg metadata in text |
| film_cpk | Sega FILM/CPK |
| filmstrip | Adobe Filmstrip |
| flac | raw FLAC |
| flic | FLI/FLC/FLX animation |
| flv | FLV format |
| framecrc | framecrc testing |
| framemd5 | Per-frame MD5 testing |
| g722 | raw G.722 |
| g723_1 | raw G.723.1 |
| g729 | G.729 raw format demuxer |
| gif | GIF Animation |
| gsm | raw GSM |
| gxf | GXF format |
| h261 | raw H.261 |
| h263 | raw H.263 |
| h264 | raw H.264 video |
| hls,applehttp | Apple HTTP Live Streaming |
| ico | Microsoft Windows ICO |
| idcin | id Cinematic |
| idf | iCE Draw File |
| iff | Interchange File Format |
| image2 | image2 sequence |
| image2pipe | piped image2 sequence |
| ingenient | raw Ingenient MJPEG |
| ipmovie | Interplay MVE |
| ipod | iPod H.264 MP4 |
| ismv | ISMV/ISMA (Smooth Streaming) |
| iss | Funcom ISS format |
| iv8 | IndigoVision 8000 video server |
| ivf | On2 IVF |
| jack | JACK Audio Connection Kit |
| jacosub | JACOsub subtitle |
| jv | Bitmap Brothers JV |
| latm | LOAS/LATM |
| lavfi | Libavfilter virtual input device |
| libdc1394 | dc1394 v.2 A/V grab |
| lmlm4 | lmlm4 raw format |
| loas | LOAS AudioSyncStream |
| lxf | VR native stream format (LXF) |
| m4v | raw MPEG-4 video format |
| matroska | Matroska file |
| matroska, webm | Matroska/WebM file |
| md5 | MD5 testing |
| mgsts | Metal Gear Solid: The Twin Snakes |
| microdvd | MicroDVD subtitle |
| mjpeg | raw MJPEG video |
| mlp | raw MLP |
| mm | American Laser Games MM |
| mmf | Yamaha SMAF |
| mov | MOV format |
| mov, mp4, m4a, 3gp, 3g2, mj2 | QuickTime/MPEG-4/Motion JPEG 2000 |
| mp2 | MPEG audio layer 2 |
| mp3 | MPEG audio layer 3 |
| mp4 | MP4 format |
| mpc | Musepack |
| mpc8 | Musepack SV8 |
| mpeg | MPEG-1 System |
| mpeg1video | raw MPEG-1 video |
| mpeg2video | raw MPEG-2 video |
| mpegts | MPEG-2 transport stream |
| mpegtsraw | MPEG-2 raw transport stream |
| mpegvideo | raw MPEG video |
| mpjpeg | MIME multipart JPEG |
| msnwctcp | MSN TCP Webcam stream |
| mtv | MTV format |
| mulaw | PCM mu-law |
| mvi | Motion Pixels MVI |
| mxf | Material eXchange |
| mxf_d10 | Material eXchange Format, D-10 Mapping |
| mxg | MxPEG clip file |
| nc | NC camera feed |
| nsv | Nullsoft Streaming Video |
| null | raw null video |
| nut | NUT format |
| nuv | NuppelVideo |
| ogg | Ogg |
| oma | Sony OpenMG audio |
| oss | Open Sound System playback |
| pmp | Playstation Portable PMP |
| psp | PSP MP4 format |
| psxstr | Sony Playstation STR |
| pva | TechnoTrend PVA file and stream |
| qcp | QCP format |
| r3d | REDCODE R3D |
| rawvideo | raw video |
| rcv | VC-1 test bitstream |
| rl2 | RL2 format |
| rm | RealMedia |
| roq | raw id RoQ |
| rpl | RPL/ARMovie |
| rso | Lego Mindstorms RSO |
| rtp | RTP output |
| rtsp | RTSP output |
| s16be | PCM signed 16 bit big-endian |
| s16le | PCM signed 16 bit little-endian |
| s24be | PCM signed 24 bit big-endian |
| s24le | PCM signed 24 bit little-endian |
| s32be | PCM signed 32 bit big-endian |
| s32le | PCM signed 32 bit little-endian |
| s8 | PCM signed 8 bit |
| sap | SAP output |
| sbg | SBaGen binaural beats script |
| sdl | SDL output device |
| sdp | SDP |
| segment | segment muxer |
| shn | raw Shorten |
| siff | Beam Software SIFF |
| smjpeg | Loki SDL MJPEG |
| smk | Smacker video |
| sol | Sierra SOL |
| sox | SoX native |
| spdif | IEC 61937 (used on S/PDIF - IEC958) |
| srt | SubRip subtitle |
| svcd | MPEG-2 PS format (VOB) |
| swf | Flash |
| thp | THP |
| tiertexseq | Tiertex Limited SEQ |
| tmv | 8088flex TMV |
| truehd | raw TrueHD |
| tta | True Audio |
| tty | Tele-typewriter |
| txd | Renderware TeXture Dictionary |
| u16be | PCM unsigned 16 bit big-endian |
| u16le | PCM unsigned 16 bit little-endian |
| u24be | PCM unsigned 24 bit big-endian |
| u24le | PCM unsigned 24 bit little-endian |
| u32be | PCM unsigned 32 bit big-endian |
| u32le | PCM unsigned 32 bit little-endian |
| u8 | PCM unsigned 8 bit format |
| vc1 | raw VC-1 |
| vc1test | VC-1 test bitstream |
| vcd | MPEG-1 System format (VCD) |
| video4linux2, v4l2 | Video4Linux2 device grab |
| vmd | Sierra VMD format |
| vob | MPEG-2 PS format (VOB) |
| voc | Creative Voice file |
| w64 | Sony Wave64 |
| wav | WAV |
| wc3movie | Wing Commander III movie |
| webm | WebM file |
| wsaud | Westwood Studios audio |
| wsvqa | Westwood Studios VQA |
| wtv | Windows Television (WTV) |
| wv | WavPack |
| xa | Maxis XA File |
| xbin | eXtended BINary text (XBIN) |
| xmv | Microsoft XMV |
| xwma | Microsoft xWMA |
| yop | Psygnosis YOP |
| yuv4mpegpipe | YUV4MPEG pipe |