File formats:
 D. = Demuxing supported
 .E = Muxing supported
 --
  E 3g2             3GP2 (3GPP2 file format)
  E 3gp             3GP (3GPP file format)
  E a64             a64 - video for Commodore 64
  E ac3             raw AC-3
  E adts            ADTS AAC (Advanced Audio Coding)
  E adx             CRI ADX
  E aiff            Audio IFF
  E alaw            PCM A-law
  E amr             3GPP AMR
  E apng            Animated Portable Network Graphics
  E aptx            raw aptX (Audio Processing Technology for Bluetooth)
  E aptx_hd         raw aptX HD (Audio Processing Technology for Bluetooth)
  E asf             ASF (Advanced / Active Streaming Format)
  E asf_stream      ASF (Advanced / Active Streaming Format)
  E ass             SSA (SubStation Alpha) subtitle
  E ast             AST (Audio Stream)
  E au              Sun AU
  E avi             AVI (Audio Video Interleaved)
  E avm2            SWF (ShockWave Flash) (AVM2)
  E avs2            raw AVS2-P2/IEEE1857.4 video
  E bit             G.729 BIT file format
  E caf             Apple CAF (Core Audio Format)
  E cavsvideo       raw Chinese AVS (Audio Video Standard) video
  E codec2          codec2 .c2 muxer
  E codec2raw       raw codec2 muxer
  E crc             CRC testing
  E dash            DASH Muxer
  E data            raw data
  E daud            D-Cinema audio
  E dirac           raw Dirac
  E dnxhd           raw DNxHD (SMPTE VC-3)
  E dts             raw DTS
  E dv              DV (Digital Video)
  E dvd             MPEG-2 PS (DVD VOB)
  E eac3            raw E-AC-3
  E f32be           PCM 32-bit floating-point big-endian
  E f32le           PCM 32-bit floating-point little-endian
  E f4v             F4V Adobe Flash Video
  E f64be           PCM 64-bit floating-point big-endian
  E f64le           PCM 64-bit floating-point little-endian
  E ffmetadata      FFmpeg metadata in text
  E fifo            FIFO queue pseudo-muxer
  E fifo_test       Fifo test muxer
  E film_cpk        Sega FILM / CPK
  E filmstrip       Adobe Filmstrip
  E fits            Flexible Image Transport System
  E flac            raw FLAC
  E flv             FLV (Flash Video)
  E framecrc        framecrc testing
  E framehash       Per-frame hash testing
  E framemd5        Per-frame MD5 testing
  E g722            raw G.722
  E g723_1          raw G.723.1
  E g726            raw big-endian G.726 ("left-justified")
  E g726le          raw little-endian G.726 ("right-justified")
  E gif             CompuServe Graphics Interchange Format (GIF)
  E gsm             raw GSM
  E gxf             GXF (General eXchange Format)
  E h261            raw H.261
  E h263            raw H.263
  E h264            raw H.264 video
  E hash            Hash testing
  E hds             HDS Muxer
  E hevc            raw HEVC video
  E hls             Apple HTTP Live Streaming
  E ico             Microsoft Windows ICO
  E ilbc            iLBC storage
  E image2          image2 sequence
  E image2pipe      piped image2 sequence
  E ipod            iPod H.264 MP4 (MPEG-4 Part 14)
  E ircam           Berkeley/IRCAM/CARL Sound Format
  E ismv            ISMV/ISMA (Smooth Streaming)
  E ivf             On2 IVF
  E jacosub         JACOsub subtitle format
  E latm            LOAS/LATM
  E lrc             LRC lyrics
  E m4v             raw MPEG-4 video
  E matroska        Matroska
  E md5             MD5 testing
  E microdvd        MicroDVD subtitle format
  E mjpeg           raw MJPEG video
  E mkvtimestamp_v2 extract pts as timecode v2 format, as defined by mkvtoolnix
  E mlp             raw MLP
  E mmf             Yamaha SMAF
  E mov             QuickTime / MOV
  E mp2             MP2 (MPEG audio layer 2)
  E mp3             MP3 (MPEG audio layer 3)
  E mp4             MP4 (MPEG-4 Part 14)
  E mpeg            MPEG-1 Systems / MPEG program stream
  E mpeg1video      raw MPEG-1 video
  E mpeg2video      raw MPEG-2 video
  E mpegts          MPEG-TS (MPEG-2 Transport Stream)
  E mpjpeg          MIME multipart JPEG
  E mulaw           PCM mu-law
  E mxf             MXF (Material eXchange Format)
  E mxf_d10         MXF (Material eXchange Format) D-10 Mapping
  E mxf_opatom      MXF (Material eXchange Format) Operational Pattern Atom
  E null            raw null video
  E nut             NUT
  E oga             Ogg Audio
  E ogg             Ogg
  E ogv             Ogg Video
  E oma             Sony OpenMG audio
  E opus            Ogg Opus
  E psp             PSP MP4 (MPEG-4 Part 14)
  E rawvideo        raw video
  E rm              RealMedia
  E roq             raw id RoQ
  E rso             Lego Mindstorms RSO
  E rtp             RTP output
  E rtp_mpegts      RTP/mpegts output format
  E rtsp            RTSP output
  E s16be           PCM signed 16-bit big-endian
  E s16le           PCM signed 16-bit little-endian
  E s24be           PCM signed 24-bit big-endian
  E s24le           PCM signed 24-bit little-endian
  E s32be           PCM signed 32-bit big-endian
  E s32le           PCM signed 32-bit little-endian
  E s8              PCM signed 8-bit
  E sap             SAP output
  E sbc             raw SBC
  E scc             Scenarist Closed Captions
  E sdl,sdl2        SDL2 output device
  E segment         segment
  E singlejpeg      JPEG single image
  E smjpeg          Loki SDL MJPEG
  E smoothstreaming Smooth Streaming Muxer
  E sox             SoX native
  E spdif           IEC 61937 (used on S/PDIF - IEC958)
  E spx             Ogg Speex
  E srt             SubRip subtitle
  E stream_segment,ssegment streaming segment muxer
  E streamhash      Per-stream hash testing
  E sup             raw HDMV Presentation Graphic Stream subtitles
  E svcd            MPEG-2 PS (SVCD)
  E swf             SWF (ShockWave Flash)
  E tee             Multiple muxer tee
  E truehd          raw TrueHD
  E tta             TTA (True Audio)
  E u16be           PCM unsigned 16-bit big-endian
  E u16le           PCM unsigned 16-bit little-endian
  E u24be           PCM unsigned 24-bit big-endian
  E u24le           PCM unsigned 24-bit little-endian
  E u32be           PCM unsigned 32-bit big-endian
  E u32le           PCM unsigned 32-bit little-endian
  E u8              PCM unsigned 8-bit
  E uncodedframecrc uncoded framecrc testing
  E vc1             raw VC-1 video
  E vc1test         VC-1 test bitstream
  E vcd             MPEG-1 Systems / MPEG program stream (VCD)
  E vidc            PCM Archimedes VIDC
  E vob             MPEG-2 PS (VOB)
  E voc             Creative Voice
  E w64             Sony Wave64
  E wav             WAV / WAVE (Waveform Audio)
  E webm            WebM
  E webm_chunk      WebM Chunk Muxer
  E webm_dash_manifest WebM DASH Manifest
  E webp            WebP
  E webvtt          WebVTT subtitle
  E wtv             Windows Television (WTV)
  E wv              raw WavPack
  E yuv4mpegpipe    YUV4MPEG pipe

