ffmpeg概述文档

General Documentation

Table of Contents

• 1. External libraries
  • 1.1 OpenJPEG
  • 1.2 OpenCORE and VisualOn libraries
    • 1.2.1 OpenCORE AMR
    • 1.2.2 VisualOn AAC encoder library
    • 1.2.3 VisualOn AMR-WB encoder library
  • 1.3 LAME
  • 1.4 libvpx
  • 1.5 x264
• 2. Supported File Formats, Codecs or Features
  • 2.1 File Formats
  • 2.2 Image Formats
  • 2.3 Video Codecs
  • 2.4 Audio Codecs
  • 2.5 Subtitle Formats
  • 2.6 Network Protocols
  • 2.7 Input/Output Devices
  • 2.8 Timecode

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1. External libraries

FFmpeg can be hooked up with a number of external libraries to add support for more formats. None of them are used by default, their use has to be explicitly requested by passing the appropriate flags to ‘./configure’.

1.1 OpenJPEG

FFmpeg can use the OpenJPEG libraries for encoding/decoding J2K videos. Go to http://www.openjpeg.org/ to get the libraries and follow the installation instructions. To enable using OpenJPEG in FFmpeg, pass --enable-libopenjpeg to ‘./configure’.

1.2 OpenCORE and VisualOn libraries

Spun off Google Android sources, OpenCore and VisualOn libraries provide encoders for a number of audio codecs.

OpenCORE and VisualOn libraries are under the Apache License 2.0 (see http://www.apache.org/licenses/LICENSE-2.0 for details), which is incompatible with the LGPL version 2.1 and GPL version 2. You have to upgrade FFmpeg’s license to LGPL version 3 (or if you have enabled GPL components, GPL version 3) to use it.

NOTE

1.2.1 OpenCORE AMR

FFmpeg can make use of the OpenCORE libraries for AMR-NB decoding/encoding and AMR-WB decoding.

Go to http://sourceforge.net/projects/opencore-amr/ and follow the instructions for installing the libraries. Then pass --enable-libopencore-amrnb and/or --enable-libopencore-amrwb to configure to enable them.

1.2.2 VisualOn AAC encoder library

FFmpeg can make use of the VisualOn AACenc library for AAC encoding.

Go to http://sourceforge.net/projects/opencore-amr/ and follow the instructions for installing the library. Then pass --enable-libvo-aacenc to configure to enable it.

1.2.3 VisualOn AMR-WB encoder library

FFmpeg can make use of the VisualOn AMR-WBenc library for AMR-WB encoding.

Go to http://sourceforge.net/projects/opencore-amr/ and follow the instructions for installing the library. Then pass --enable-libvo-amrwbenc to configure to enable it.

1.3 LAME

FFmpeg can make use of the LAME library for MP3 encoding.

Go to http://lame.sourceforge.net/ and follow the instructions for installing the library. Then pass --enable-libmp3lame to configure to enable it.

1.4 libvpx

FFmpeg can make use of the libvpx library for VP8 encoding.

Go to http://www.webmproject.org/ and follow the instructions for installing the library. Then pass --enable-libvpx to configure to enable it.

1.5 x264

FFmpeg can make use of the x264 library for H.264 encoding.

Go to http://www.videolan.org/developers/x264.html and follow the instructions for installing the library. Then pass --enable-libx264 to configure to enable it.

x264 is under the GNU Public License Version 2 or later (see http://www.gnu.org/licenses/old-licenses/gpl-2.0.html for details), you must upgrade FFmpeg’s license to GPL in order to use it.

NOTE

2. Supported File Formats, Codecs or Features

You can use the -formats and -codecs options to have an exhaustive list.

2.1 File Formats

FFmpeg supports the following file formats through the libavformat library:

Name	Encoding	Decoding	Comments
4xm		X	4X Technologies format, used in some games.
8088flex TMV		X
ACT Voice		X	contains G.729 audio
Adobe Filmstrip	X	X
Audio IFF (AIFF)	X	X
American Laser Games MM		X	Multimedia format used in games like Mad Dog McCree.
3GPP AMR	X	X
Apple HTTP Live Streaming		X
Artworx Data Format		X
ASF	X	X
AVI	X	X
AVISynth		X
AVS		X	Multimedia format used by the Creature Shock game.
Beam Software SIFF		X	Audio and video format used in some games by Beam Software.
Bethesda Softworks VID		X	Used in some games from Bethesda Softworks.
Binary text		X
Bink		X	Multimedia format used by many games.
Bitmap Brothers JV		X	Used in Z and Z95 games.
Brute Force & Ignorance		X	Used in the game Flash Traffic: City of Angels.
BWF	X	X
CRI ADX	X	X	Audio-only format used in console video games.
Discworld II BMV		X
Interplay C93		X	Used in the game Cyberia from Interplay.
Delphine Software International CIN		X	Multimedia format used by Delphine Software games.
CD+G		X	Video format used by CD+G karaoke disks
Commodore CDXL		X	Amiga CD video format
Core Audio Format	X	X	Apple Core Audio Format
CRC testing format	X
Creative Voice	X	X	Created for the Sound Blaster Pro.
CRYO APC		X	Audio format used in some games by CRYO Interactive Entertainment.
D-Cinema audio	X	X
Deluxe Paint Animation		X
DFA		X	This format is used in Chronomaster game
DV video	X	X
DXA		X	This format is used in the non-Windows version of the Feeble Files game and different game cutscenes repacked for use with ScummVM.
Electronic Arts cdata		X
Electronic Arts Multimedia		X	Used in various EA games; files have extensions like WVE and UV2.
FFM (FFserver live feed)	X	X
Flash (SWF)	X	X
Flash 9 (AVM2)	X	X	Only embedded audio is decoded.
FLI/FLC/FLX animation		X	.fli/.flc files
Flash Video (FLV)	X	X	Macromedia Flash video files
framecrc testing format	X
FunCom ISS		X	Audio format used in various games from FunCom like The Longest Journey.
G.723.1	X	X
G.729 BIT	X	X
G.729 raw		X
GIF Animation	X
GXF	X	X	General eXchange Format SMPTE 360M, used by Thomson Grass Valley playout servers.
iCEDraw File		X
ICO		X	Microsoft Windows ICO
id Quake II CIN video		X
id RoQ	X	X	Used in Quake III, Jedi Knight 2 and other computer games.
IEC61937 encapsulation	X	X
IFF		X	Interchange File Format
Interplay MVE		X	Format used in various Interplay computer games.
IV8		X	A format generated by IndigoVision 8000 video server.
IVF (On2)	X	X	A format used by libvpx
LATM	X	X
LMLM4		X	Used by Linux Media Labs MPEG-4 PCI boards
LOAS		X	contains LATM multiplexed AAC audio
LXF		X	VR native stream format, used by Leitch/Harris’ video servers.
Matroska	X	X
Matroska audio	X
FFmpeg metadata	X	X	Metadata in text format.
MAXIS XA		X	Used in Sim City 3000; file extension .xa.
MD Studio		X
Metal Gear Solid: The Twin Snakes		X
Mobotix .mxg		X
Monkey’s Audio		X
Motion Pixels MVI		X
MOV/QuickTime/MP4	X	X	3GP, 3GP2, PSP, iPod variants supported
MP2	X	X
MP3	X	X
MPEG-1 System	X	X	muxed audio and video, VCD format supported
MPEG-PS (program stream)	X	X	also known as VOB file, SVCD and DVD format supported
MPEG-TS (transport stream)	X	X	also known as DVB Transport Stream
MPEG-4	X	X	MPEG-4 is a variant of QuickTime.
MIME multipart JPEG	X
MSN TCP webcam		X	Used by MSN Messenger webcam streams.
MTV		X
Musepack		X
Musepack SV8		X
Material eXchange Format (MXF)	X	X	SMPTE 377M, used by D-Cinema, broadcast industry.
Material eXchange Format (MXF), D-10 Mapping	X	X	SMPTE 386M, D-10/IMX Mapping.
NC camera feed		X	NC (AVIP NC4600) camera streams
NTT TwinVQ (VQF)		X	Nippon Telegraph and Telephone Corporation TwinVQ.
Nullsoft Streaming Video		X
NuppelVideo		X
NUT	X	X	NUT Open Container Format
Ogg	X	X
Playstation Portable PMP		X
TechnoTrend PVA		X	Used by TechnoTrend DVB PCI boards.
QCP		X
raw ADTS (AAC)	X	X
raw AC-3	X	X
raw Chinese AVS video	X	X
raw CRI ADX	X	X
raw Dirac	X	X
raw DNxHD	X	X
raw DTS	X	X
raw E-AC-3	X	X
raw FLAC	X	X
raw GSM		X
raw H.261	X	X
raw H.263	X	X
raw H.264	X	X
raw Ingenient MJPEG		X
raw MJPEG	X	X
raw MLP		X
raw MPEG		X
raw MPEG-1		X
raw MPEG-2		X
raw MPEG-4	X	X
raw NULL	X
raw video	X	X
raw id RoQ	X
raw Shorten		X
raw TrueHD	X	X
raw VC-1		X
raw PCM A-law	X	X
raw PCM mu-law	X	X
raw PCM signed 8 bit	X	X
raw PCM signed 16 bit big-endian	X	X
raw PCM signed 16 bit little-endian	X	X
raw PCM signed 24 bit big-endian	X	X
raw PCM signed 24 bit little-endian	X	X
raw PCM signed 32 bit big-endian	X	X
raw PCM signed 32 bit little-endian	X	X
raw PCM unsigned 8 bit	X	X
raw PCM unsigned 16 bit big-endian	X	X
raw PCM unsigned 16 bit little-endian	X	X
raw PCM unsigned 24 bit big-endian	X	X
raw PCM unsigned 24 bit little-endian	X	X
raw PCM unsigned 32 bit big-endian	X	X
raw PCM unsigned 32 bit little-endian	X	X
raw PCM floating-point 32 bit big-endian	X	X
raw PCM floating-point 32 bit little-endian	X	X
raw PCM floating-point 64 bit big-endian	X	X
raw PCM floating-point 64 bit little-endian	X	X
RDT		X
REDCODE R3D		X	File format used by RED Digital cameras, contains JPEG 2000 frames and PCM audio.
RealMedia	X	X
Redirector		X
Renderware TeXture Dictionary		X
RL2		X	Audio and video format used in some games by Entertainment Software Partners.
RPL/ARMovie		X
Lego Mindstorms RSO	X	X
RTMP	X	X	Output is performed by publishing stream to RTMP server
RTP	X	X
RTSP	X	X
SAP	X	X
SBG		X
SDP		X
Sega FILM/CPK		X	Used in many Sega Saturn console games.
Sierra SOL		X	.sol files used in Sierra Online games.
Sierra VMD		X	Used in Sierra CD-ROM games.
Smacker		X	Multimedia format used by many games.
SMJPEG	X	X	Used in certain Loki game ports.
Sony OpenMG (OMA)	X	X	Audio format used in Sony Sonic Stage and Sony Vegas.
Sony PlayStation STR		X
Sony Wave64 (W64)		X
SoX native format	X	X
SUN AU format	X	X
Text files		X
THP		X	Used on the Nintendo GameCube.
Tiertex Limited SEQ		X	Tiertex .seq files used in the DOS CD-ROM version of the game Flashback.
True Audio		X
VC-1 test bitstream	X	X
WAV	X	X
WavPack		X
WebM	X	X
Windows Televison (WTV)	X	X
Wing Commander III movie		X	Multimedia format used in Origin’s Wing Commander III computer game.
Westwood Studios audio		X	Multimedia format used in Westwood Studios games.
Westwood Studios VQA		X	Multimedia format used in Westwood Studios games.
XMV		X	Microsoft video container used in Xbox games.
xWMA		X	Microsoft audio container used by XAudio 2.
eXtended BINary text (XBIN)		X
YUV4MPEG pipe	X	X
Psygnosis YOP		X
ZeroCodec Lossless Video		X

X means that encoding (resp. decoding) is supported.

2.2 Image Formats

FFmpeg can read and write images for each frame of a video sequence. The following image formats are supported:

Name	Encoding	Decoding	Comments
.Y.U.V	X	X	one raw file per component
animated GIF	X	X	Only uncompressed GIFs are generated.
BMP	X	X	Microsoft BMP image
DPX	X	X	Digital Picture Exchange
EXR		X	OpenEXR
JPEG	X	X	Progressive JPEG is not supported.
JPEG 2000	X	X
JPEG-LS	X	X
LJPEG	X		Lossless JPEG
PAM	X	X	PAM is a PNM extension with alpha support.
PBM	X	X	Portable BitMap image
PCX	X	X	PC Paintbrush
PGM	X	X	Portable GrayMap image
PGMYUV	X	X	PGM with U and V components in YUV 4:2:0
PIC		X	Pictor/PC Paint
PNG	X	X
PPM	X	X	Portable PixelMap image
PTX		X	V.Flash PTX format
SGI	X	X	SGI RGB image format
Sun Rasterfile	X	X	Sun RAS image format
TIFF	X	X	YUV, JPEG and some extension is not supported yet.
Truevision Targa	X	X	Targa (.TGA) image format
XBM	X	X	X BitMap image format
XWD	X	X	X Window Dump image format

X means that encoding (resp. decoding) is supported.

E means that support is provided through an external library.

2.3 Video Codecs

Name	Encoding	Decoding	Comments
4X Movie		X	Used in certain computer games.
8088flex TMV		X
8SVX exponential		X
8SVX fibonacci		X
A64 multicolor	X		Creates video suitable to be played on a commodore 64 (multicolor mode).
American Laser Games MM		X	Used in games like Mad Dog McCree.
AMV Video	X	X	Used in Chinese MP3 players.
ANSI/ASCII art		X
Apple MJPEG-B		X
Apple ProRes	X	X
Apple QuickDraw		X	fourcc: qdrw
Asus v1	X	X	fourcc: ASV1
Asus v2	X	X	fourcc: ASV2
ATI VCR1		X	fourcc: VCR1
ATI VCR2		X	fourcc: VCR2
Auravision Aura		X
Auravision Aura 2		X
Autodesk Animator Flic video		X
Autodesk RLE		X	fourcc: AASC
Avid 1:1 10-bit RGB Packer	X	X	fourcc: AVrp
AVS (Audio Video Standard) video		X	Video encoding used by the Creature Shock game.
AYUV	X	X	Microsoft uncompressed packed 4:4:4:4
Beam Software VB		X
Bethesda VID video		X	Used in some games from Bethesda Softworks.
Bink Video		X
Bitmap Brothers JV video		X
y41p Brooktree uncompressed 4:1:1 12-bit	X	X
Brute Force & Ignorance		X	Used in the game Flash Traffic: City of Angels.
C93 video		X	Codec used in Cyberia game.
CamStudio		X	fourcc: CSCD
CD+G		X	Video codec for CD+G karaoke disks
CDXL		X	Amiga CD video codec
Chinese AVS video	E	X	AVS1-P2, JiZhun profile, encoding through external library libxavs
Delphine Software International CIN video		X	Codec used in Delphine Software International games.
Discworld II BMV Video		X
Cinepak		X
Cirrus Logic AccuPak	X	X	fourcc: CLJR
Creative YUV (CYUV)		X
DFA		X	Codec used in Chronomaster game.
Dirac	E	X	supported through external library libschroedinger
Deluxe Paint Animation		X
DNxHD	X	X	aka SMPTE VC3
Duck TrueMotion 1.0		X	fourcc: DUCK
Duck TrueMotion 2.0		X	fourcc: TM20
DV (Digital Video)	X	X
Dxtory capture format		X
Feeble Files/ScummVM DXA		X	Codec originally used in Feeble Files game.
Electronic Arts CMV video		X	Used in NHL 95 game.
Electronic Arts Madcow video		X
Electronic Arts TGV video		X
Electronic Arts TGQ video		X
Electronic Arts TQI video		X
Escape 124		X
Escape 130		X
FFmpeg video codec #1	X	X	lossless codec (fourcc: FFV1)
Flash Screen Video v1	X	X	fourcc: FSV1
Flash Screen Video v2	X	X
Flash Video (FLV)	X	X	Sorenson H.263 used in Flash
Forward Uncompressed		X
Fraps		X
H.261	X	X
H.263 / H.263-1996	X	X
H.263+ / H.263-1998 / H.263 version 2	X	X
H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10	E	X	encoding supported through external library libx264
H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (VDPAU acceleration)	E	X
HuffYUV	X	X
HuffYUV FFmpeg variant	X	X
IBM Ultimotion		X	fourcc: ULTI
id Cinematic video		X	Used in Quake II.
id RoQ video	X	X	Used in Quake III, Jedi Knight 2, other computer games.
IFF ILBM		X	IFF interleaved bitmap
IFF ByteRun1		X	IFF run length encoded bitmap
Intel H.263		X
Intel Indeo 2		X
Intel Indeo 3		X
Intel Indeo 4		X
Intel Indeo 5		X
Interplay C93		X	Used in the game Cyberia from Interplay.
Interplay MVE video		X	Used in Interplay .MVE files.
J2K	X	X
Karl Morton’s video codec		X	Codec used in Worms games.
Kega Game Video (KGV1)		X	Kega emulator screen capture codec.
Lagarith		X
LCL (LossLess Codec Library) MSZH		X
LCL (LossLess Codec Library) ZLIB	E	E
LOCO		X
lossless MJPEG	X	X
Microsoft RLE		X
Microsoft Video 1		X
Mimic		X	Used in MSN Messenger Webcam streams.
Miro VideoXL		X	fourcc: VIXL
MJPEG (Motion JPEG)	X	X
Mobotix MxPEG video		X
Motion Pixels video		X
MPEG-1 video	X	X
MPEG-1/2 video XvMC (X-Video Motion Compensation)		X
MPEG-1/2 video (VDPAU acceleration)		X
MPEG-2 video	X	X
MPEG-4 part 2	X	X	libxvidcore can be used alternatively for encoding.
MPEG-4 part 2 Microsoft variant version 1		X
MPEG-4 part 2 Microsoft variant version 2	X	X
MPEG-4 part 2 Microsoft variant version 3	X	X
Nintendo Gamecube THP video		X
NuppelVideo/RTjpeg		X	Video encoding used in NuppelVideo files.
On2 VP3		X	still experimental
On2 VP5		X	fourcc: VP50
On2 VP6		X	fourcc: VP60,VP61,VP62
VP8	E	X	fourcc: VP80, encoding supported through external library libvpx
planar RGB		X	fourcc: 8BPS
Prores		X	fourcc: apch,apcn,apcs,apco
Q-team QPEG		X	fourccs: QPEG, Q1.0, Q1.1
QuickTime 8BPS video		X
QuickTime Animation (RLE) video	X	X	fourcc: ’rle ’
QuickTime Graphics (SMC)		X	fourcc: ’smc ’
QuickTime video (RPZA)		X	fourcc: rpza
R10K AJA Kona 10-bit RGB Codec	X	X
R210 Quicktime Uncompressed RGB 10-bit	X	X
Raw Video	X	X
RealVideo 1.0	X	X
RealVideo 2.0	X	X
RealVideo 3.0		X	still far from ideal
RealVideo 4.0		X
Renderware TXD (TeXture Dictionary)		X	Texture dictionaries used by the Renderware Engine.
RL2 video		X	used in some games by Entertainment Software Partners
Sierra VMD video		X	Used in Sierra VMD files.
Smacker video		X	Video encoding used in Smacker.
SMPTE VC-1		X
Snow	X	X	experimental wavelet codec (fourcc: SNOW)
Sony PlayStation MDEC (Motion DECoder)		X
Sorenson Vector Quantizer 1	X	X	fourcc: SVQ1
Sorenson Vector Quantizer 3		X	fourcc: SVQ3
Sunplus JPEG (SP5X)		X	fourcc: SP5X
TechSmith Screen Capture Codec		X	fourcc: TSCC
Theora	E	X	encoding supported through external library libtheora
Tiertex Limited SEQ video		X	Codec used in DOS CD-ROM FlashBack game.
Ut Video		X
v210 QuickTime uncompressed 4:2:2 10-bit	X	X
v308 QuickTime uncompressed 4:4:4	X	X
v408 QuickTime uncompressed 4:4:4:4	X	X
v410 QuickTime uncompressed 4:4:4 10-bit	X	X
VBLE Lossless Codec		X
VMware Screen Codec / VMware Video		X	Codec used in videos captured by VMware.
Westwood Studios VQA (Vector Quantized Animation) video		X
Windows Media Image		X
Windows Media Video 7	X	X
Windows Media Video 8	X	X
Windows Media Video 9		X	not completely working
Wing Commander III / Xan		X	Used in Wing Commander III .MVE files.
Wing Commander IV / Xan		X	Used in Wing Commander IV.
Winnov WNV1		X
WMV7	X	X
YAMAHA SMAF	X	X
Psygnosis YOP Video		X
yuv4	X	X	libquicktime uncompressed packed 4:2:0
ZLIB	X	X	part of LCL, encoder experimental
Zip Motion Blocks Video	X	X	Encoder works only in PAL8.

X means that encoding (resp. decoding) is supported.

E means that support is provided through an external library.

2.4 Audio Codecs

Name	Encoding	Decoding	Comments
8SVX audio		X
AAC+	E	X	encoding supported through external library libaacplus
AAC	E	X	encoding supported through external library libfaac and libvo-aacenc
AC-3	IX	X
ADPCM 4X Movie		X
ADPCM CDROM XA		X
ADPCM Creative Technology		X	16 -> 4, 8 -> 4, 8 -> 3, 8 -> 2
ADPCM Electronic Arts		X	Used in various EA titles.
ADPCM Electronic Arts Maxis CDROM XS		X	Used in Sim City 3000.
ADPCM Electronic Arts R1		X
ADPCM Electronic Arts R2		X
ADPCM Electronic Arts R3		X
ADPCM Electronic Arts XAS		X
ADPCM G.722	X	X
ADPCM G.726	X	X
ADPCM IMA AMV		X	Used in AMV files
ADPCM IMA Electronic Arts EACS		X
ADPCM IMA Electronic Arts SEAD		X
ADPCM IMA Funcom		X
ADPCM IMA QuickTime	X	X
ADPCM IMA Loki SDL MJPEG		X
ADPCM IMA WAV	X	X
ADPCM IMA Westwood		X
ADPCM ISS IMA		X	Used in FunCom games.
ADPCM IMA Duck DK3		X	Used in some Sega Saturn console games.
ADPCM IMA Duck DK4		X	Used in some Sega Saturn console games.
ADPCM Microsoft	X	X
ADPCM MS IMA	X	X
ADPCM Nintendo Gamecube THP		X
ADPCM QT IMA	X	X
ADPCM SEGA CRI ADX	X	X	Used in Sega Dreamcast games.
ADPCM Shockwave Flash	X	X
ADPCM SMJPEG IMA		X	Used in certain Loki game ports.
ADPCM Sound Blaster Pro 2-bit		X
ADPCM Sound Blaster Pro 2.6-bit		X
ADPCM Sound Blaster Pro 4-bit		X
ADPCM Westwood Studios IMA		X	Used in Westwood Studios games like Command and Conquer.
ADPCM Yamaha	X	X
AMR-NB	E	X	encoding supported through external library libopencore-amrnb
AMR-WB	E	X	encoding supported through external library libvo-amrwbenc
Apple lossless audio	X	X	QuickTime fourcc ’alac’
Atrac 1		X
Atrac 3		X
Bink Audio		X	Used in Bink and Smacker files in many games.
CELT		E	decoding supported through external library libcelt
Delphine Software International CIN audio		X	Codec used in Delphine Software International games.
Discworld II BMV Audio		X
COOK		X	All versions except 5.1 are supported.
DCA (DTS Coherent Acoustics)	X	X
DPCM id RoQ	X	X	Used in Quake III, Jedi Knight 2 and other computer games.
DPCM Interplay		X	Used in various Interplay computer games.
DPCM Sierra Online		X	Used in Sierra Online game audio files.
DPCM Sol		X
DPCM Xan		X	Used in Origin’s Wing Commander IV AVI files.
DSP Group TrueSpeech		X
DV audio		X
Enhanced AC-3	X	X
FLAC (Free Lossless Audio Codec)	X	IX
G.723.1	X	X
G.729		X
GSM	E	X	encoding supported through external library libgsm
GSM Microsoft variant	E	X	encoding supported through external library libgsm
IMC (Intel Music Coder)		X
MACE (Macintosh Audio Compression/Expansion) 3:1		X
MACE (Macintosh Audio Compression/Expansion) 6:1		X
MLP (Meridian Lossless Packing)		X	Used in DVD-Audio discs.
Monkey’s Audio		X	Only versions 3.97-3.99 are supported.
MP1 (MPEG audio layer 1)		IX
MP2 (MPEG audio layer 2)	IX	IX
MP3 (MPEG audio layer 3)	E	IX	encoding supported through external library LAME, ADU MP3 and MP3onMP4 also supported
MPEG-4 Audio Lossless Coding (ALS)		X
Musepack SV7		X
Musepack SV8		X
Nellymoser Asao	X	X
PCM A-law	X	X
PCM mu-law	X	X
PCM 16-bit little-endian planar		X
PCM 32-bit floating point big-endian	X	X
PCM 32-bit floating point little-endian	X	X
PCM 64-bit floating point big-endian	X	X
PCM 64-bit floating point little-endian	X	X
PCM D-Cinema audio signed 24-bit	X	X
PCM signed 8-bit	X	X
PCM signed 16-bit big-endian	X	X
PCM signed 16-bit little-endian	X	X
PCM signed 24-bit big-endian	X	X
PCM signed 24-bit little-endian	X	X
PCM signed 32-bit big-endian	X	X
PCM signed 32-bit little-endian	X	X
PCM signed 16/20/24-bit big-endian in MPEG-TS		X
PCM unsigned 8-bit	X	X
PCM unsigned 16-bit big-endian	X	X
PCM unsigned 16-bit little-endian	X	X
PCM unsigned 24-bit big-endian	X	X
PCM unsigned 24-bit little-endian	X	X
PCM unsigned 32-bit big-endian	X	X
PCM unsigned 32-bit little-endian	X	X
PCM Zork		X
QCELP / PureVoice		X
QDesign Music Codec 2		X	There are still some distortions.
RealAudio 1.0 (14.4K)	X	X	Real 14400 bit/s codec
RealAudio 2.0 (28.8K)		X	Real 28800 bit/s codec
RealAudio 3.0 (dnet)	IX	X	Real low bitrate AC-3 codec
RealAudio Lossless		X
RealAudio SIPR / ACELP.NET		X
Shorten		X
Sierra VMD audio		X	Used in Sierra VMD files.
Smacker audio		X
SMPTE 302M AES3 audio		X
Sonic	X	X	experimental codec
Sonic lossless	X	X	experimental codec
Speex	E	E	supported through external library libspeex
True Audio (TTA)		X
TrueHD		X	Used in HD-DVD and Blu-Ray discs.
TwinVQ (VQF flavor)		X
Vorbis	E	X	A native but very primitive encoder exists.
WavPack		X
Westwood Audio (SND1)		X
Windows Media Audio 1	X	X
Windows Media Audio 2	X	X
Windows Media Audio Lossless		X
Windows Media Audio Pro		X
Windows Media Audio Voice		X

X means that encoding (resp. decoding) is supported.

E means that support is provided through an external library.

I means that an integer-only version is available, too (ensures high performance on systems without hardware floating point support).

2.5 Subtitle Formats

Name	Muxing	Demuxing	Encoding	Decoding
SSA/ASS	X	X	X	X
DVB	X	X	X	X
DVD	X	X	X	X
JACOsub	X	X		X
MicroDVD	X	X		X
PGS				X
SubRip (SRT)	X	X	X	X
XSUB			X	X

X means that the feature is supported.

2.6 Network Protocols

Name	Support
Apple HTTP Live Streaming	X
file	X
Gopher	X
HTTP	X
MMS	X
pipe	X
RTP	X
TCP	X
UDP	X

X means that the protocol is supported.

2.7 Input/Output Devices

Name	Input	Output
ALSA	X	X
BKTR	X
DV1394	X
Linux framebuffer	X
JACK	X
LIBCDIO	X
LIBDC1394	X
OSS	X	X
Pulseaudio	X
Video4Linux2	X
VfW capture	X
X11 grabbing	X

X means that input/output is supported.

2.8 Timecode

Codec/format	Read	Write
DV	X	X
GXF	X	X
MOV	X
MPEG1/2	X	X
MXF	X	X

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This document was generated on May 11, 2012 using texi2html 1.82.