https://github.com/004helix/h264remote

https://github.com/004helix/h264remote

Last synced: 9 days ago
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• Host: GitHub
• URL: https://github.com/004helix/h264remote
• Owner: 004helix
• Created: 2020-10-06T10:50:54.000Z (about 4 years ago)
• Default Branch: master
• Last Pushed: 2020-10-11T18:50:08.000Z (about 4 years ago)
• Last Synced: 2024-08-01T13:18:52.300Z (3 months ago)
• Language: C
• Size: 38.1 KB
• Stars: 1
• Watchers: 3
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# h264send / h264feed

H264/HEVC remote camera access kit for slow and/or unstable connections

Send example:

```

$ ffmpeg -nostdin -hide_banner -nostats -rtsp_transport tcp -stimeout 5000000 \

  -i rtsp://:554/user=admin_password=_channel=1_stream=1.sdp -c:v copy -f h264 - | \

  h264send -a  -p  -k  -s 1048576

```

Feed example:

```

$ h264feed -a  -p  -k  | \

  ffmpeg -nostdin -hide_banner -nostats -format h264 -i - -c:v mjpeg -global_quality 85 -f mpjpeg - | \

  ffmpjpeg-httpd -a 127.0.0.1 -p 8080

```

The main idea is:

on sender:

 - get H264/HEVC NAL byte stream on stdin from ffmpeg

 - divide it to frames (VPS + PPS + SPS + I-frame / P-frame; there is no support for B-frames)

 - prepend each frame with the timestamp when it was received from stdin

 - encrypt data with chacha20 stream cipher and send it too feeder

 - if connection to feeder has closed (or send buffer has overflowed):

   - reconnect, skippinng any frames from stdin

   - wait the next I-frame (prepended with VPS, PPS and SPS units)

   - send "new" stream

on feeder:

 - accept and authenticate connection from sender

 - receive and decrypt frames

 - send frames to stdout keeping pause between frames according to timestamps from sender

 - if new connection from sender was authenticated, all old connections will be closed (if any)