1. Overview of Upipe modules for broadcast professionals
Christophe Massiot (FOSDEM 2017)
Overview of Upipe modules for broadcast professionals

2. Upipe modules for broadcast professionals
What is Upipe?
A young (2012) C multimedia framework
Initiated by OpenHeadend team
3 supporting companies, 7 contributors
Focus on reliability, efficiency and compliance, for broadcast and professional applications
MIT and LGPL
Upipe modules for broadcast professionals

3. Upipe modules for broadcast professionals
What’s new? (tl;dr)
Completed event loop API + easier pthread
Pipeline dumping to graphviz format
Luajit bindings
HLS client
H.265 framer
VANC support in SDI
Pre-release 5 in the works
Upipe modules for broadcast professionals

4. Upipe inputs for broadcast
PCIe boards:
Blackmagic Decklink SDI
DVEO DVB-ASI
Native support:
File, UDP or HTTP protocols
Compliant TS demux
RTP demux
HLS client
Multicat directory
External library:
Libavformat (Work In Progress)
Upipe modules for broadcast professionals

5. Upipe outputs for broadcast
PCIe boards:
Blackmagic Decklink SDI (not merged)
DVEO DVB-ASI (not merged)
Native support:
File, UDP, RTP
Compliant TS mux
Multicat directory
External libraries:
Libavformat
GLX, ALSA
Upipe modules for broadcast professionals

6. Upipe filters for broadcast
Native support:
Video: deinterlace (blend), blit, crop, asm-optimized v210 pack/unpack
Audio: EBU R128
External libraries:
Libavcodec
Video: libswscale, x264
Audio: libswresample, libspeex
Subtitles: libzvbi (CEA 708 encoding)
Upipe modules for broadcast professionals

7. Upipe framers for broadcast
Framers act as “bitstream filters” to reshape elementary streams automatically (negotiation)
Native support:
Video: MPEG-2, H.264, H.265
Audio: MPEG-1 layers I, II, III, MPEG-2 AAC ADTS, A/52, opus, SMPTE 302, SMPTE 337
Subtitles: DVB teletext, DVB subtitles
Upipe modules for broadcast professionals

8. Upipe assets for broadcast
Keep both original & system timestamps for reliable + compliant dejittering
System timestamp from hardware clock
Everything is dynamic: propagation of stream changes
Efficient user-defined threading
Shared buffers with COW and zero-copy
Lua bindings
Upipe modules for broadcast professionals

9. Upipe modules for broadcast professionals
Use case 1: player
Upipe modules for broadcast professionals

10. Upipe modules for broadcast professionals
Use case 2: TS remux
Upipe modules for broadcast professionals

11. Upipe modules for broadcast professionals
Use case 3: recording
Upipe modules for broadcast professionals

12. Upipe modules for broadcast professionals
Use case 4: mosaic
Upipe modules for broadcast professionals

13. Other use cases in production
Integrated Receiver Decoder from TS or HLS
Live encoder/transcoder to TS, RTMP, icecast, etc.
File transcoder to TS, mp4, etc.
MPTS mux
Playout system with overlay
Upipe modules for broadcast professionals

14. Upipe modules for broadcast professionals