MPEG-2 TS packet analyser which enables parsing, decoding and low level analysis of ISO/DVB transport streams.
This PoC purpose was to quickly extract EIT tables for example from a captured DTT transport stream file without having the whole PSI tables also extracted. It can enable the output of those EIT present & following events in JSON format which can be easily used in browser applications.
# node -v
8.15.1
# node eit_extractor.js stream-dvbt.ts
...
TOTAL number of services found: 37
TOTAL number of EIT found: 63
TOTAL time spent: 11sNote: this one gigabyte TS file has been captured with dvbstream 0.8.2 on the French DTT broadcast network using a Pinnacle USB tuner key.
| Software | Version | Development language | Parsing time ⏱ | Note |
|---|---|---|---|---|
| VLC dvb_print_si | 1.4 |  standard |
0:01 | Fastest raw parser (but without EIT only filtering) |
| DVB inspector | 1.10 |  with Oracle JIT |
0:37 | Boosted with BufferedInputStream but not yet with NIO 2.0 API |
| node-eit-ts-extractor | 0.1 |  under NodeJS v8 |
0:11 | Pretty fast I/O access with C++ AoT (Chrome V8 engine inside) |
| 0.2 |  under NodeJS v10+ |
? | Handling multi-cores CPU using (NodeJS |
Note: those benchmarks were done on Ubuntu 16.04 LTS using linux time command on an old Core2Duo (2Ghz) laptop with a 7200rpm HDD formatted in standard ext4 filesystem.
- Add TODO comments
- Migrate from JShint to ESlint
- Convert ES5 notation to ES6 with async/await, rest/spread operator, arrow functions, ...
- Try to use ES6 array destructing assignment within binary extractor methods and some binary structures like construct-js
- Split the parsing algorithm into pieces that will be sent to Worker threads using NodeJS v10+
- Test everything on multi-core CPU + SSD (more I/O bandwidth than standard HDD)
