Lorenzo Pallara (l.pallara@avalpa.com)
This package is a collection of softwares for Linux system to play out and multiplex MPEG2 transport stream format Use-cases: MHP, MHEG5, HbbTv and others interactive tv standards object carousel broadcast Playout of locally stored, offline encoded audio and video for non-live tv and radio stations Multiplexing of input multicasted UDP transport stream to output multicasted UDP transport stream VOD system based on mpeg2 transport stream over IP or over DVB for walled garden network like hotels with coax or ethernet. DVB-SSU update Data casting Teletext generator IP encapsualtor PSI/SI generator EPG generator
OpenCaster output has been successfully integrated with a long list of dvb products, among them there are products by Cisco/Scientific Atlanta, Ericsson/Tandberg, Dektec, Eurotek, Harmonic/Scopus, MainConcept, Mitan, Screen Service, Adtec, Wellav, Arris, Sr-Systems, Deltacast, ...
Avalpa Broadcast Server manual is available here
OpenCaster has been tested with Rohde & Schwarz DVM100L, Rohde & Schwarz DVM 400, Dektec StreamXpert and a countless number of set top boxes, digital receivers and television sets
- PSI generation (PAT, PMT, NIT, SDT, TDT, AIT, TOT, ...)
- EPG/EIT generation
- Object and data carousel generation and receivement (MHP, MHEG5, HbbTv, DVB-SSU, DSMCC, ...)
- third party software AC-3, MPEG2 audio, MPEG2 video and H264 video encoders support
- Audio Description generation support
- IP encapsulation (MPE)
- Teletext generation
- CBR transport stream muxing
- PCR stamping
- Null packet replacement
- PID filtering
- PID remapping
- Null packet insertion
- Video buffer verifier
- PCR timing verifier
- PES headers analyzer
- MPEG2 video and MPEG2/AC-3 audio ES header analyzer
- M2TS file generation from TS file
A demonstration transport stream is available at here
DVB-T modulations:
Modulation Coding rate Guard interval 1/4 1/8 1/16 1/32 QPSK 1/2 4.976 5.529 5.855 6.032 2/3 6.635 7.373 7.806 8.043 3/4 7.465 8.294 8.782 9.048 5/6 8.294 9.216 9.758 10.053 7/8 8.709 9.676 10.246 10.556 16-QAM 1/2 9.953 11.059 11.709 12.064 2/3 13.271 14.745 15.612 16.086 3/4 14.929 16.588 17.564 18.096 5/6 16.588 18.431 19.516 20.107 7/8 17.418 19.353 20.491 21.112 64-QAM 1/2 14.929 16.588 17.564 18.096 2/3 19.906 22.118 23.419 24.128 3/4 22.394 24.882 26.346 27.144 5/6 24.882 27.647 29.273 30.160 7/8 26.126 29.029 30.737 31.668
channel to frequency table:
21 474 22 482 23 490 24 498 25 506 26 514 27 522 28 530 29 538 30 546 31 554 32 562 33 570 34 578 35 586 36 594 37 602 38 610 39 618 40 626 41 634 42 642 43 650 44 658 45 666 46 674 47 682 48 690 49 698 50 706 51 714 52 722 53 730 54 738 55 746 56 754 57 762 58 770 59 778 60 786 61 794 62 802 63 810 64 818 65 826 66 834 67 842 68 850 69 858
mpeg audio layer 2 suggested bit rates: 56 kbps -> 1 pes packet -> 1 ts packet 112 kbps -> 1 pes packet -> 2 ts packets 160 kbps -> 1 pes packet -> 3 ts packets 224 kbps -> 1 pes packet -> 4 ts packets all the others fall in the middle and are not a wise choice