yair 3a799c0a65 Adapt pipeline to transmit single line (2456x1) instead of 2456x4

- Modified recv_raw_rolling.py to handle 2456x1 BGR line format
- Fixed display dimensions (2456 tall x 800 wide)
- Updated 200fps-2456x4pix-cw.ini to start at Y=500
- Added detailed single line transmission docs to network_guide.md
- Updated README.md with quick start example using videocrop

2025-11-14 19:32:14 +02:00

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How to Send a Single Line (2456x1)

Real Data - Single Line Transmission

The camera captures 2456x4 pixels, but we extract and transmit only one line (2456x1) using videocrop.

Daytime Configuration (200fps)

gst-launch-1.0 idsueyesrc config-file=ini/200fps-2456x4pix-cw.ini exposure=5 framerate=200 `
    ! videocrop bottom=3 `
    ! queue `
    ! udpsink host=127.0.0.1 port=5000

Nighttime Configuration (100fps, extra gain)

gst-launch-1.0 idsueyesrc config-file=ini/100fps-10exp-2456x4pix-500top-cw-extragain.ini exposure=10 framerate=100 `
    ! videocrop bottom=3 `
    ! queue `
    ! udpsink host=127.0.0.1 port=5000

Key Parameters:

videocrop bottom=3 - Extracts only the top line (removes bottom 3 rows from 2456x4 image)
Input: 2456x4 BGR from camera
Output: 2456x1 BGR line transmitted via UDP
Frame size: 7368 bytes (2456 × 1 × 3 channels)

Alternative: To extract the bottom line instead, use videocrop top=3

Python/OpenCV Receiver

# Basic rolling display
uv run .\scripts\recv_raw_rolling.py

# With display throttling and recording
uv run .\scripts\recv_raw_rolling.py --display-fps 60 --save-mjpeg .\results\output_60fps.avi

# Max performance (no display, stats only)
uv run .\scripts\recv_raw_rolling.py --no-display

See scripts/recv_raw_rolling.py for the Python implementation with debug options.

Configuration Notes

Both INI files are configured with:

Start Y = 500 (captures from row 500 of the sensor)
Height = 4 pixels
Width = 2456 pixels
This optimizes for the center region of the sensor

Note: exposure=5 (5ms) may be too fast for some applications. Adjust based on your requirements.

Demo Data (Testing)

Sender (crop to first column, send raw over UDP)

gst-launch-1.0 -v `
    videotestsrc pattern=smpte ! `
    videocrop left=0 right=639 top=0 bottom=0 ! `
    video/x-raw,format=RGB,width=1,height=640,framerate=30/1 ! `
    udpsink host=127.0.0.1 port=5000

GStreamer Receiver (raw UDP → display)

gst-launch-1.0 -v `
    udpsrc port=5000 caps="video/x-raw,format=RGB,width=1,height=640,framerate=30/1" ! `
    videoconvert ! `
    autovideosink

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