NTTW4-FFmpeg.pdf

A multimedia project used by
VLC, Youtube, Vimeo, HandBrake
and many others
Carl Eugen Hoyos

FFmpeg
 Fabrice Bellard (QEMU) December 2000
 Michael Niedermayer since 2004
 >1.000.000 LOC, >1000 contributors
 ~200 contributors, 3000 commits per year
 LGPL (optional parts: GPL and proprietary)
 Source code, no “products”

Command line utilities
 ffmpeg
 ffplay
 ffprobe
 qt-faststart

Libraries
 libavformat
 libavcodec
 libavfilter
 libswscale
 libswresample
 libavdevice
 libpostproc
 libavutil

libavformat 1/2
 mov/mp4/isom (Apple QuickTime)
 avi (Microsoft)
 asf/wma/wmv (Microsoft)
 Matroska/WebM
 MPEG-TS (DVB) , MPEG-PS (DVD)
 ogg (Xiph)

libavformat 2/2
 MXF
 HLS / DASH (streaming)
 wav (Microsoft audio)
 caf (Apple audio)
 flv (Macromedia / Adobe)
 nut (FFmpeg)

libavcodec video 1/2
 MPEG Video / H.261 (Encoding & Decoding)
 MPEG-4 ASP / H.263 (Encoding & Decoding)
 MPEG-4 AVC / H.264
 HEVC
 VC-1 (Microsoft)
 Theora

libavcodec video 2/2
 Duck TrueMotion 1.0, 2.0, VP3, VP4, VP5,
VP6, VP7, VP8, VP9 (Google)
 Sorenson Video 1, 3, Spark (Apple, Flash)
 RV10, RV20, RV30, RV40 (RealVideo)
 huffyuv, ffvhuff, Lagarith (lossless)
 DnxHD, ProRes, CineForm (Intermediate)
 FFv1, Snow (FFmpeg)

AV1
 Internal parser
 Two external decoding libraries
 Two external encoding libraries
 no internal decoder (yet?)

libavcodec audio
 MP1, MP2, MP3
 AC-3, E-AC-3, TrueHD (Dolby)
 AAC
 DTS, …, DTS HD-Master
 Vorbis, Opus
 Sonic (FFmpeg)

libavcodec image formats
 jpg / lossless jpeg / jpeg lossless
 bmp
 png
 SGI
 TIFF
 DPX
 JPEG-2000

libavfilter
 Scale, Crop
 Overlay
 Hue
 De-interlacers, Inverse telecine filters
 Framerate interpolation filters
 > 250 Filters

Obsolescence (media formats)
 WMV
 Duck Truemotion (Sega Saturn)
 4xm (Gameboy, Sega, Windows)
 Sega Film
 SNM (LucasArts)
 THP (Nintendo)

Obsolescence (FFmpeg)
 ANSI C, Posix

NIH
 The Ten commandments for C programmers:
 7) Thou shalt study thy libraries and strive not to
reinvent them without cause, that thy code may be
short and readable and thy days pleasant and
productive.
 FFmpeg:
 Our wheels are rounder

Bugs
 FLAC: 2006 – 2015
 Possibly relevant for Archivists
 Produced non-lossless files
 Recoverable
 Reproducible only with FFmpeg, not Xiph's libflac

What’s new
 8-channel E-AC-3 decoding (Paul B Mahol)
 Many new filters (Paul B Mahol)
 Bit-exact vc1 decoding (Jerome Borsboom)
 HLS and DASH improvements
 Improved hardware decoding and encoding for
Nvidia, AMD and Intel

What’s missing
 Removal of an external filter because of
license violations

What is FFmpeg not
 FFmpeg is not a file archiving system
 FFmpeg is not a file validator
 FFmpeg is not bug-free
 FFmpeg is not feature-complete

NTTW4-FFmpeg.pdf

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NTTW4-FFmpeg.pdf