Capturing Streaming MP4 VLC Wireshark Packets using RTP Audio/Video Profile

Abstract: Learn how to use VLC to stream an MP4 file using the RTP Audio/Video Profile, and capture the packets in Wireshark. This tutorial covers the basic steps of configuring the VLC stream output string, and filtering the captured packets in Wireshark for analysis. Improve your network troubleshooting skills and get a deeper understanding of streaming protocols. Read more for a step-by-step guide to capturing MP4 VLC Wireshark packets.

Created: 2025-02-13 by UserComp.com Editors

Here's a step-by-step guide on how to capture RTP Audio/Video packets using VLC and Wireshark with the SAP (SDP info) from the VLC stream.mp4 file.

First, open the VLC media player and load the stream.mp4 file.
Navigate to the "Stream" menu, then select "Stream Output".
In the Stream Output dialog box, click on the "Add" button to create a new stream output.
Choose the "RTSP" protocol, and in the "RTSP stream URL" field, enter a unique URL for your stream. For example, rtsp://localhost:8554/stream.
In the "Transcode" tab, enable the transcode option and configure it as follows:
- Video codec: H264
- Audio codec: MP4A (AAC)
- Profile: RTP Audio/Video Profile
- Audio codec settings: 44100 Hz, stereo, 256 kbps
- Video codec settings: 640x360, 30 fps, 1500 kbps
Click on the "Stream" button to start streaming the video.
Now, open Wireshark and select the network interface you want to capture packets on.
Start the capture by clicking on the "Capture" > "Start" menu or pressing Ctrl+E.
In Wireshark, filter the captured packets to only show RTP packets by entering rtp in the filter bar and pressing Enter.
To view the SDP information, right-click on any RTP packet and select "Follow SDP". The SDP information will be displayed in a separate window.

After following these steps, you should be able to capture RTP Audio/Video packets using VLC and Wireshark with the SAP (SDP info) from the VLC stream.mp4 file.

References:

Books:
- Steven Ogden, "TCP/IP Guide: Volume I, Internet Protocols"
- James F. Kurose, Keith W. Ross, "Computer Networking: A Top-Down Approach"
Articles:
- VLC Stream Output
- Wireshark RTP Analysis
Online Resources:
- VLC Stream Output Tutorial
- Wireshark RTP Analysis Guide

Tags: streaming vlc wireshark rtp audio video

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