Network Video Recorder Implementations in various langauges

Build all C/C++ implementations

make

c_pthread_only_with_libffmpeg

• Written in C
• Uses pthreads for multi-threading
  • Specially, even if there's only one source, it will still be multi-threading, to cover the potential loss between two sequences (default being 3 seconds overlapping)
• Directly linked with libffmpeg and use libffmpeg functions so very lightweight

Run

./nvr --storage [storage definition] (--storage [storage definition] (--storage [storage definition] (...)))
      --camera [camera definition] (--camera [camera definition] (--camera [camera definition] (...)))
      (--help)
      (--version)

  - [storage deinition]: [path]:[thresholds]
    - [path]: folder name or path, relative or absolute both fine
    - [thresholds]: [from]:[to]
      - [from]: when free space <= this percent, triggers cleaning
      - [to]: when free space >= this percent, stops cleaning
  - [camera definition]: [name]:[strftime]:[url]
    - [name]: 
    - [strftime]: strftime definition to be used to generate output name
    - [url]: a valid input url for ffmpeg

Example

./nvr --camera rooftop:%Y%m%d/%H00/%Y%m%d_%H%M%S_rooftop:rtsp://127.0.0.1:8554/rooftop --camera road:%Y%m%d/%H00/%Y%m%d_%H%M%S_road:rtsp://127.0.0.1:8554/road --camera garden:%Y%m%d/%H00/%Y%m%d_%H%M%S_garden:rtsp://127.0.0.1:8554/garden --storage 0-hot:10:90 --storage 1-warmer:3:5 --storage 2-warm:1:3 --storage 3-cold:1:2

c_fork_only_with_ffmpeg

• Written in C
• Uses fork for multi-processing
  • Specially, even if there's only one source, it will still be multi-threading, to cover the potential loss between two sequences (default being 10 seconds overlapping)
• Calls ffmpeg with fork+exec method
  • Overhead could be introduced for invoking ffmpeg

Run

./nvr --storage [storage definition] (--storage [storage definition] (--storage [storage definition] (...)))
      --camera [camera definition] (--camera [camera definition] (--camera [camera definition] (...)))
      --help
      --version

  - [storage deinition]: [path]:[thresholds]
    - [path]: folder name or path, relative or absolute both fine
    - [thresholds]: [from]:[to]
      - [from]: when free space <= this percent, triggers cleaning
      - [to]: when free space >= this percent, stops cleaning
  - [camera definition]: [name]:[url]
    - [name]: 
    - [url]: a valid input url for ffmpeg

Example:

./nvr --camera rooftop:rtsp://127.0.0.1:8554/rooftop --camera road:rtsp://127.0.0.1:8554/road --camera garden:rtsp://127.0.0.1:8554/garden --storage hot:10:90 --storage warm:5:10 --storage cold:1:5

cpp_fork_only_with_ffmpeg

• Written in C++
• Essentially the c_fork_only_with_ffmpeg implementation

python_subprocess_only

• Written in Python
• Essentially the c_fork_only_with_ffmpeg implementation