End-to-end payload path through realistic network encapsulation.

• tools/rtp_video_packetizer.py: Converts a series of PNG images into an H.264/H.265 stream, packetizes over RTP, and writes a PCAP.
• tools/rtp_pcap_to_video_extractor.py: Reconstructs H.264/H.265 elementary stream from RTP in a PCAP and remuxes/encodes to MP4.

• Python 3.6+
• Scapy (pip install scapy)
• FFmpeg installed and available on PATH

Install python deps:

pip install scapy

Usage:

# From repository root
python tools/rtp_video_packetizer.py
# Configure input frame directory, codec, IPs/ports, and output PCAP inside the script

This script will:

1. Read PNG frames from a directory (e.g., server/<Game>/%04d.png)
2. Encode them to H.264/H.265 using FFmpeg
3. Packetize the encoded bitstream into RTP packets
4. Save the packets into a PCAP file

Configuration (inside the script):

• Image source directory
• Output PCAP filename
• Network parameters (src_ip, dst_ip, src_port, dst_port, SSRC)
• Video codec (h264 or h265)
• Timing: target FPS, RTP timestamp increment, optional jitter/pacing

Usage:

python tools/rtp_pcap_to_video_extractor.py \
  --input input_pcap.pcap \
  --output output.mp4 \
  --codec h264

Arguments:

• --input: PCAP path
• --output: MP4 path (default: output.mp4)
• --codec: h264 or h265 (default h264)

Example:

python tools/rtp_pcap_to_video_extractor.py \
  --input rtp_stream_h264_fixed.pcap \
  --output extracted_video.mp4 \
  --codec h264

• Inspect PCAP with Wireshark; verify RTP payload type and timestamp increments at 90kHz clock (for H.264/H.265).
• Confirm sequence numbers increment and SSRC remains stable.
• If payload appears fragmented incorrectly, ensure FFmpeg packaging and MTU assumptions align.
• For heavy packet loss PCAPs, the output may be playable with visual artifacts—pair with the degradation simulator to study controlled impairments.