Gstreamer Rtp Streaming Example

Compression algorithms for video are often referred to as a 'codec'. In this lab you will implement a streaming video server and client that communicate using the Real-Time Streaming Protocol (RTSP) and send data using the Real-time Transfer Protocol (RTP). 264 video encoder, in each RTP payload. Samsung Open Source Group 1 Synchronised multi-device media playback with GStreamer Luis de Bethencourt Samsung Open Source Group [email protected] Reflects the sampling instant of the first byte in the RTP data packet. Other examples include Theora, Xvid and Divx. RTP Streaming H. Here is a diagram showing the internals of rtpsession. Here is what I have done so far: Recorded the H264 encoded video from IP camera's RTP H264 stream using following pipeline:. Example: GStreamer can be used to build a pipeline workflow that reads media files in one format → processes them → and exports them into. 264, can be packed into RTP before sending over UDP (TBC) From man gst-launch : Network streaming Stream video using RTP and network elements. It allows programmers to create a variety of media-handling components, including simple audio playback, audio and video playback, recording, streaming and editing. GStreamer Transcoding and Scaling. This type of technology is widely implemented throughout technology today, evident in streaming services like Netflix and YouTube. 000Z Chuck aa0hw http://qrqcwnet. Timestamp clock continues to increase at constant rate when source is inactive. 264 encoder using Gstreamer. My observations regarding the HTML 5 video tag and rtsp(rtp) streams are, that it only works with konqueror(KDE 4. This example is in C, but GStreamer also has bindings for Rust, Python, Java, C#, Vala, and so on. rtpstreamdepay. RTSP Multicast Scenario Setup. XM6 platform, gstreamer can be used directly to display a digital camera stream. So, we can share our media content with our friends live without uploading to internet, just by giving ip-address and port to our friends. I'm new to gstreamer. Here is an example in which, input ts file is streamed realtime to another gstreamer pipeline. To transport the stream of of video data packets there are many possibilities. Gstreamer RTSP server library. Although it's difficult to access Android camera 2 API via GStreamer source element, there are encoder and decoder elements in gst-plugins-bad. Gstreamer is a tool for manipulating video streams. MX6 Decoding. This scenario has not been tested. 0 to generate an audio and video test-pattern, encode it to RTP-wrapped VP8-encoded video and Opus-encoded audio, and send it via UDP to the IP/port that the Janus server will be listening to. 264 file and determine which of the these gstreamer commands sucessfully plays the example video. QGC remains with “no-video” (5600 udp port is used) and gstreamer does not open the video window. GStreamer i. Since we're going to send our video stream out over TCP, we need to make sure that our video is "glued together" and arrives over the network in the proper order. FSL Pipeline Examples: GStreamer i. how to do the real time video streaming with gstreamer, Jun Zhang. On the second side, you have VoIP systems, which are generally targeted a relatively low bitrate using low latency technologies such as RTP and WebRTC, and. I looked on the internet and most of the articles saying about Gstreamer. RTP provides timestamps that will provide audio/video sync. I would like to know the easiest way how to get frames from rtsp video stream to, for example, store them to files as jpeg/png/bmp etc. So, we can share our media content with our friends live without uploading to internet, just by giving ip-address and port to our friends. 264 GStreamer pipelines examples for non-VPU SoCs - Part 2 stream 2 minute read This post shows some GStreamer pipelines examples for video streaming using H. Host PC can be used as server to transmit encoded stream. how to do the real time video streaming with gstreamer, Stefan Sauer. RTSP Multicast Scenario Setup. 1 (localhost) and Port 5200. I wrote a simple app which should read frames from mjpeg stream gstreamer. I've installed GStreamer. Here are the details: This client-server combination works:. RTSP Multicast Scenario Setup. Since GStreamer can be used for network streaming, programs like VLC can be used to capture this media stream using a SDP file. 4), and cross-compile for OMAP3530 platform, work with TI DMAI gstreamer(the latest 1. I am not clear that any of the suggestions would do that. Stream WebM video over RTP with GStreamer. I am really in a very hard situation. com/profile/chase. GStreamer Examples for Images and Video This section lists Gstreamer commands that can be used to activate a camera by either streaming data from the camera as a viewfinder on a display (or HDMI output) or by sending the data stream to a video encoder for compression and storage as a video file. For example: reception ports, Payload Type, encoding settings, etc. As I understand, I need to perform the following actions (please correct me if I wrong): Demuxing RTMP stream Mu. And now I want to ask you a question about VLC interaction with gstreamer. Stream WebM video over RTP/UDP. gst-plugins-base-1. Even though the files are not stored in servers, they can be stored locally at clients. GStreamer RTP Streaming Other plugins: GStreamer ffmpeg. I'm having some trouble figuring out how to create a simple rtp stream with gstreamer and display it on vlc. Transcode into MPEG TS and stream over RTP/TS. The GStreamer website does provide some examples, however it does not pertain to using imx-plugins. RFC 7826 RTSP 2. cache/gstreamer-1. MX6 Image Capture. Ich las here, dass es Probleme mit RTP/RTSP in HTML5, aber wer weiß, vielleicht jetzt ist es schon arbeiten. Some background: RTP is used primarily to stream either H. is a tool that builds and runs basic GStreamer pipelines. It should be possible to use FFmpeg to send or receive RTP streams; just make sure that all stream details match between the SDP negotiation and the actual encoded stream. (참고 문서 : RFC2326) 이 프로토콜은 비디오 혹은 오디오 기능을 가진 클. 7b3 is no longer supported and you are advices to update to a stable (e. 30 and VLC 1. There are often differences while using media between gstreamer v1. GStreamer i. 7 too) and python-gst-1. In the following example we will use a TIME value (of Gst. ❍if application generates chunks of 160 encoded samples, then timestamp increases by 160 for each RTP packet when source is active. Theorur is a GUI for Ogg/Theora streaming (Icecast2 system), written using gtk2. The first step is the. 0 -vvv udpsrc port=XXXX caps="application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)H264, payload=(int)101" ! rtph264depay ! video/x-h264, stream-format=byte-stream ! avdec_h264. Rtsp Stream With Gstreamer Showing 1-5 of 5 messages. Recently I've encountered a problem which GStreamer solves but ffmpeg does not. For testing, I'm receiving the stream with a GStreamer pipeline with gst-launch when connecting to an RTSP server. What you see in the picture is an Android app, written in Qt, streaming video with GStreamer over DDS. Recently I downloaded gstreamer rtsp server plugin(0. For example, to use your improved language model with GStreamer, you just have to set the lm and dict properties on the pocketsphinx element. RFC 7826 RTSP 2. 3V buck for Omega2. 0) provided by GStreamer, for streaming. Background. 264/AAC RTSP(RTP) stream. It supports many popular video and audio codecs. This pipeline simply uses `udpsink` to multicast the raw video RTP packets on localhost to allow for multiple ‘subscribers’. What I want to develop a server to broadcast live content on the computer screen, that is, which is displayed at the time that is broadcast in streaming. For now I am using these command line tools(gst-launch-1. Here is the script : #!/usr/bin/python3 # this example shows how to receive, decode and display a RTP h264 stream # I'm using it to receive stream from Raspberry Pi # This is the pipeline :. GStreamer i. ffmpeg,video-streaming,gstreamer I have two video streaming units capable of streaming live video inputs: AXIS Q7424-R Video Encoder EPIPHAN VGADVI Broadcaster 99460 - I am using gstreamer to view these streams on client terminals running linux. 0 "autovideosink" does not open the display. GStreamer is a streaming media framework, based on graphs of filters which operate on media data. From the command line. This section gives example where EVM acts as RTP client, which receives encoded stream via udp then decodes and display output. RTSP(Real Time Streaming Protocol)은 스트리밍 미디어 서버를 컨트롤 하기위한 통신시스템등을 위해 고안된 네트워크 프로토콜입니다. So IMHO, if you need to use Android camera api 2, capturing 4k video as I420 then streaming to pipeline by using appsrc which is connected to encoder element. 2 Or you can just change the parameter to v4l2src to output h264. I'm new to gstreamer. gst-launch-1. Next Gstreamer will do the RTP/UDP streaming over its capable WiFi. GStreamer is a pipeline-based multimedia framework written in the C programming language with the type system based on GObject. , audio encoding, over time. Often shortened to just streaming, live streaming is the process of transmitting media 'live' to computers and devices. RTSP provides an extensible framework to enable controlled, on-demand delivery of real-time data, such as audio and video. Archived from the original on 2007-03-06. It uses Python 3 (but should work with 2. This is an example of multi-bitrate DASH streaming configuration. If you use RTP you need to tell the receiving side some more info - which is usually transferred via SDP: udpsrc port=5000 ! application/x-rtp, clock-rate=90000, encoding-name=MP2T-ES ! rtpmp2tdepay !. Accelerated GStreamer User Guide DA_07303 | 7. Fluendo is a leading provider of multimedia software solutions based on GStreamer, an open source and cross platform multimedia framework. Some background: RTP is used primarily to stream either H. "Play raw H264 files using gstreamer" is published by Pete Houston. In this example, RTP packets are sent on port 5000, sender RTCP. Raw videos, e. paths for the GStreamer application and libraries may need to be updated to be properly accessed and executed. c in KDM in KDE Software Compilation (SC) 2. It makes use of Gstreamer version 0. GStreamer camera streaming on i. This code was written from reading the related RFCs. webm -vcodec vp9 -acodec opus -b:v 200k -b:a 80k out. Perhaps there is a third party application that can receive the gstreamer UDP video stream and emulate a hardware webcam that MP could see. GStreamer STRP for full HD H. So IMHO, if you need to use Android camera api 2, capturing 4k video as I420 then streaming to pipeline by using appsrc which is connected to encoder element. The gst-nvmedia plugin uses the NvMedia API to provide hardware acceleration for media playback on Tegra platform for GStreamer based applications. For example, to use your improved language model with GStreamer, you just have to set the lm and dict properties on the pocketsphinx element. However, I've been able to reproduce the same issue when streaming straight from another GStreamer instance with just RTP. Normally in RTP streaming the specs are transmitted out-of-band. RTP Company is committed to providing you with solutions, customization, and service for all your thermoplastic needs. GStreamer i. 0 through 1. 264 elementary streams from a RTP streaming source, each of 1280x720 size, into one video output stream of. This is an example of multi-bitrate DASH streaming configuration. From the command line, type the following to show full screen video (replace port number to what your camera is using). This led Ericsson to choose GStreamer as the base for its OpenWebRTC project. Since we're going to send our video stream out over TCP, we need to make sure that our video is "glued together" and arrives over the network in the proper order. , a central information repository about RTSP. You can use Wireshark filters in order to analyze simultaneous packet captures taken at or close-to the source and destination of a call. 264 payloader. Stream WebM video over RTP/UDP. This code was used for Elphel network cameras, multicasting RTP/MJPEG but it should be compatible with almost all RTP/MJPEG technologies. When the rtp stream is changed to gstreamer, it seems to zero out the packets for all but the first. If you use RTP you need to tell the receiving side some more info - which is usually transferred via SDP: udpsrc port=5000 ! application/x-rtp, clock-rate=90000, encoding-name=MP2T-ES ! rtpmp2tdepay !. Handbrake is a GUI/CLI free software. 2 shows an example GStreamer pipeline for MCN Streaming sender. Live Webcam Streaming using VLC on the Command Line The following are notes on using VLC as both server and server to stream a webcam from a ender across a LAN to multiple receivers. mx6solo and i. 42 where 239. GStreamer 1. With RTSP stream you will be limited to parameters coming from DESCRIBE request only and datagram timestamps. And lastly, lets try running an rtp server. It serves only the signalling and controlling purpose and doesn't bring any media exchange capabilities on its own. The bottom of that linked file has an example RTSP and MJPEG pipeline string that might help to point you in the right direction If you are familiar with GStreamer and still want to go that route, then the GStreamer code that our samples provide is what I can best refer you to examine. Video Streaming. RTP to RTSP stream. The goal is to live-stream a camera image to an RTSP client (ideally a browser plugin in the end). a / RFC3550. RTP for broadcasting-over-IP use-cases in GStreamer: PTP, RFC7273 for Ravenna, AES67, SMPTE 2022 & SMPTE 2110 It's that time of year again where the broadcast industry gathers at NAB show , which seems like a good time to me to revisit some frequently asked questions about GStreamer 's support for various broadcasting related standards. 264/AAC encoding from on-demand and live sources. The stream offered by Apple is a normal Quicktime http stream, but our RTSP server repackages it and retransmits it over RTSP on my local network on the fly. I'm sorry to see you here, because I know your pain. gstreamer is a development framework not a media player and there isn't a way to stream so that common players such as VLC can display the stream (without users having to. LIVE555 liveMedia / openRTSP : Open source C++ server and client libraries used in well-known clients like VLC and mplayer. 1) will stream it via RTP using rtpbin to localhost ports 50000-50003:. So for this we need to clone it switch to the correct branch and compile and install it. For example, you can split apart the MPEG-1 stream and send audio on one IP address and video on another, or you can send both audio & video on the same address. I would need a test gstreamer application to prove test the plugins. Normally all audio pipelines use an audio codec and RTP encapsulation. Transport stream parser library can be used as an independent library to parse transport stream received by any mean, for example read from a file or received from an UDP multicast. tag:qrqcwnet. Direct RTSP URL: Click image above to play stream. I used VLC, Gstreamer, and some proprietary streaming servers. Frame drop when playing RTP stream using SDP file; How te retrieve stream statistics in Gstreamer? RTP/RTCP server and client Examples: seeking, flushes, end. More GStreamer Tips: Picture-in-Picture Compositing In a previous post I gave a few examples showing how simple text overlays can be added to any video stream in GStreamer. GStreamer RTP Streaming Other plugins: GStreamer ffmpeg. Supported H. In this example Liquidsoap will be configured to output three different MPEGTS video streams with various frame size, bitrates and one stereo audio MPEGTS stream all via UDP. Host PC can be used as server to transmit encoded stream. • Methods to retrieve recorded video from the Lenel NVR via RTP/RTSP. RTSP/RTP streaming support for MPlayer The Open Source "MPlayer" media player can now receive and play standards-compliant RTP audio/video streams, using the "LIVE555 Streaming Media" source code libraries. In TCP/IP networks an UDP transport is the most simple solution. 10 and uses RTP and RTCP, as well as a TCP socket for link status and control. gstreamer pipeline to stream raw audio over network. And gst-launch-1. Now it's time to look at compositing between two or more video streams, also called picture in picture. My only suggestion would be to confirm with a different host that you're able to view the IP camera stream with gstreamer [sounds like your build host has all the right stuff]. 264 file and determine which of the these gstreamer commands sucessfully plays the example video. I try few example to stream webcam between computers and it works properly:. The QMainWindow widget is rendered in regular intervals to QImages in RGBA format, then inserted into a GStreamer pipeline via the `appsrc` plugin. mx6solo and i. c in KDM in KDE Software Compilation (SC) 2. I'd like it to be an RTP stream, and be able to listen into with VLC with minimal latency. org Abstract During the last year the Linux Bluetooth community worked hard to establish a solution for streaming audio using the Bluetooth wireless technology. MX6 over the network. You have probably noticed by now that working with GStreamer and Python is quite difficult, mainly because of the lack of real documentation and examples. Introduction This memo defines version 2. gstreamer pipeline to stream raw. Contribute to GStreamer/gst-rtsp-server development by creating an account on GitHub. GStreamer i. Here's a quick highlight of the important bits that should get you started if you already know how GStreamer works. Compression algorithms for video are often referred to as a 'codec'. While streaming media content, both are used and they work together. This document does not describe methods to include RTP video on a web page which requires the use. 0でエレメント一覧が表示されるのでgrepでテキトウに探す。. Gstreamer is constructed using a pipes and filter architecture. 42 is the multicast IP address you want to join. RTSP server based on GStreamer. A pipeline might stream video from a file to a network, or add an echo to a recording, or (most interesting to us) capture the output of a Video4Linux device. Please someone explain or provide an introduction (simple) tutorial to help me to understand the concept of pipeline. 264 encoded video from the camera to my home server. This section gives example where EVM acts as streaming server, which captures, encodes and transmit via udp. Is there an example on how I can send a video from Jetson TX2 to another computer via ethernet using GStreamer?. A protip by christurnbull about ffmpeg, raspberry pi, and gstreamer. I try few example to stream webcam between computers and it works properly:. Alternatives - Using PulseAudio directly Trying to configure PulseAudio directly to stream audio from one computer to another turned out to be more difficult than I wanted. the flags are necessary for cluttersink to disable some software processing stuff that will make the video too slow - and currently this is the best solution. It focusses only on internal LAN streaming, using RTSP, UDP and RTP as the streaming solutions, and working via the command line in Linux. Live streaming technology is often employed to relay live events such as sports, concerts and more generally TV and Radio programmes that are output live. Host PC can be used as client to decode. GStreamer i. When the rtp stream is changed to gstreamer, it seems to zero out the packets for all but the first. 0) Transport File Resource. After the update of Gstreamer to 1. , audio encoding, over time. If I can get example code or pointers what I need to modify that. Something like : file has an example RTSP and MJPEG pipeline. This code was written from reading the related RFCs. Host PC can be used as client to decode. 0) provided by GStreamer, for streaming. Contribute to GStreamer/gst-rtsp-server development by creating an account on GitHub. 10, which would be sufficient for streaming need; however, gstreamer-1. Next is setting up the GStreamer pipeline. I have a working solution with ffmpeg so basically would need help to translate this to working gstreamer pipeline. RTCP is a part of RTP and helps with lip synchronization and QOS management, among others. In unicast mode, the provided examples work very nice (RTSP, SDP, RTP and RTCP)!. 0 could be executed. Host PC can be used as server to transmit encoded stream. mx6dl processors. using MUMBLE VOICE CHAT as an example to send a LIVE USB WEBCAM stream to multiple targets over the internet in this example there are 3 other people in the same MUMBLE CHANNEL that I would. 265/HEVC video streaming GStreamer is an open source multimedia framework for constructing graphs of media-handling components. How to stream video and audio from a Raspberry Pi with no latency June 4th, 2013 Lauszus Leave a comment Go to comments I have finally finished my last exams, so now I have more time to focus on some of my own projects. gstreamer appsrc in action Lately I have been exploring gstreamer to play AV from a transport stream demultiplexer that I am developing (mostly for fun, slightly for work). is a tool that builds and runs basic GStreamer pipelines. Open Elementi, insert the streaming media source in your project and set its URI according to the chosen streaming protocol. The gst-nvmedia plugin is built to be compatible with the GStreamer version specified in the Release Notes. 1, Phonon-backend set to GStreamer). Video Streaming. This post will discuss how to use GStreamer and Mission Planner together to display the HD video with a HUD (Head-Up-Display). 42 is the multicast IP address you want to join. Dear all, I'm testing with the gst-rtsp-server (branch 1. This page was last edited on 15 October 2019, at 04:37. Host PC can be used as server to transmit encoded stream. 0 This section describes example gst- launch-1. #accidentally www. Behaviour: RTP Transport Type (c) AMWA 2017, CC Attribution-ShareAlike 4. ffmpeg,video-streaming,gstreamer I have two video streaming units capable of streaming live video inputs: AXIS Q7424-R Video Encoder EPIPHAN VGADVI Broadcaster 99460 - I am using gstreamer to view these streams on client terminals running linux. 10-alsa for alsasrc and alsasink gstreamer0. Here are the two pictures: top - streaming, bottom - receiving the stream over RTP locally. which your current example does not) 2. 42 where 239. Media Player Link Examples. RTSP/RTP streaming support for MPlayer The Open Source "MPlayer" media player can now receive and play standards-compliant RTP audio/video streams, using the "LIVE555 Streaming Media" source code libraries. I succeeded to compile gstreamer and plugins for target device. 7 too) and python-gst-1. This code was used for Elphel network cameras, multicasting RTP/MJPEG but it should be compatible with almost all RTP/MJPEG technologies. • Alternate methods to retrieve recorded video from the Lenel NVR via RTP/RTSP. Behaviour: RTP Transport Type (c) AMWA 2017, CC Attribution-ShareAlike 4. The setup has isolated the variation to the RTP stream alone. GStreamer Transcoding and Scaling. videoconvert; ffmpeg => libav; Applying -v will print out useful information. This document describes the process of how to decipher the Real-Time Streaming (RTP) stream for packet loss analysis in Wireshark for voice and video calls. A SETUP request specifies how a single media stream must be transported. While I have found a lot of command line examples using queue. Frame drop when playing RTP stream using SDP file; How te retrieve stream statistics in Gstreamer? RTP/RTCP server and client Examples: seeking, flushes, end. This is an implementation of RTP/MJPEG protocol in C#. It works if I use gst-launch-1. If I can get example code or pointers what I need to modify that. Examples of stream- ing stored applications include RealPlayer [2 J, Apple's Quick Time [3], and Microsoft Windows Media [4). GStreamer allows a programmer to create a variety of media-handling components, including simple audio playback, audio and video playback, recording, streaming and editing. The GStreamer framework provides a standard managed environment for constructing media flow from a device such as a. So yes - RTP or RTSP streaming are basically referring to the same thing and thus it doesn't work. Using the Logitech C920 webcam with Gstreamer You may already know about my existing enthusiasm for Logitech webcams, which is due to the combination of relatively good image quality, high resolution and easy to use UVC interface. The client tries to connect, connection fails (blocked UDP traffic, NAT, firewall or something like that being annoying). Anyway, you don't strictly need gdppay. Under some circumstances, for example, an RTP source switching streams or changing the output device, this clock can be lost and a new one needs to be selected. I have been trying to find an example for a gstreamer RTSP client able to handle multiple URI's programmed in C. Could you please send me an example how to stream rtp packages. The sending and receiving of RTP and RTCP packets are managed by a GStreamer RTP bin 2. The minimal GStreamer pipeline for playing the video stream of a mp4 file (QuickTime / H. 0 through 4. Note: The primary audio in the stream should be used for any sync testing. I would like to know the easiest way how to get frames from rtsp video stream to, for example, store them to files as jpeg/png/bmp etc. Even though the files are not stored in servers, they can be stored locally at clients. try adding a demuxer/decoder before re-encoding the stream), e. Since the version of gstreamer on raspbian is so old. At the moment I'm trying to test a streaming through the network. "We officially support the following RTSP Servers: Sun Microsystems StreamStar, Streaming 21 VOD Server, SeaChange VOD Server, Elecard VOD server (SigmaVOD), Kasenna MediaBase VOD Server. how to do the real time video streaming with gstreamer, Aleksander Dutkowski. On the client side I run the script attached (client-H264-PCMA. Some background: RTP is used primarily to stream either H. So, we can share our media content with our friends live without uploading to internet, just by giving ip-address and port to our friends. RTP Streaming H. 0 could be executed. はじめに 本ドキュメントでは、 Wireshark などで取得された RTP パケットのキャプチャファイルから、ビデオを再生する方法を紹介します。 ビデオファイルの生成にはマルチメディアフレームワークの GStreamer を使用します。. However this seems to have been a local config issue -- I removed ~/. I use gstreamer (QGst) to play the video. how to do the real time video streaming with gstreamer, Jun Zhang; gstreamer-embedded Digest, Vol 9, Issue 2, Saravanan Vijayaperumal. 1:6666/test) and broadcast it as another rtsp stream (rtsp://2. Right now, I can stream the GStreamer videotestsrc through this simple pipeline:. We develop highly efficient solutions ranging from audio & video codecs to customized media player streaming applications. ❍if application generates chunks of 160 encoded samples, then timestamp increases by 160 for each RTP packet when source is active. The gst-nvmedia plugin is built to be compatible with the GStreamer version specified in the Release Notes. Receive a stream with VLC Receive an unicast stream % vlc -vvv rtp:// Receive a multicast stream % vlc -vvv rtp://@239. 264 file and determine which of the these gstreamer commands sucessfully plays the example video. 0 w/ Windows 7 As talked about in our previous post , the MJPG-Streamer video rate using the Pi's Camera module was definitely not acceptable for our project. It seems now that MP can only see an actual video device on the PC. 8 FPS • Need a solution with better performance => GPU V4L2 Source Format Convert Render HDMI Gstreamer Pipeline Scale Mix (PiP) V4L2 Source gst-launch-1. Fluendo is a leading provider of multimedia software solutions based on GStreamer, an open source and cross platform multimedia framework. See also Manual Tests > List Available Streams with Avahi for a similar example using avahi-browse -r _rtsp. The above example streams H263 video and AMR audio data. And most importantly the negotiation results. RTP provides end-to-end network transport functions suitable for applications transmitting real-time data, such as audio, video or simulation data, over multicast or unicast network services. It makes use of Gstreamer version 0. Write in Gstreamer pipeline from opencv in python. 3V buck for Omega2. The following table summarizes the client types that support H. GStreamer RTSP server. The catch is that you need need gstreamer on the client used to view the stream. The other sources, a local ts file and multicast rtp stream (originating from this host), seem to be 720x480 and I'd like to figure out how to change their display size smaller or larger within the videomix like I am able to do with the static videotestsrc. The example demonstrates how simple it is to connect the basic building blocks.