I use libvlc in an Android application, and I experience a deadlock: libvlc.stop() does never return in some cases. Please note that for this to work the local network must be capable of supporting multicast. You can see my configuration in Figure 2. I would like to replace the laptop by a Beaglebone black. Receive a stream with VLC Receive an unicast stream % vlc -vvv rtp:// Receive a multicast stream % vlc -vvv rtp://@239.255.12.42 where 239.255.12.42 is the multicast IP address you want to join.. On the laptop I have to use W7 as the Linux versions I tried have too much latency. VLC is widely used by consumers and professionals alike. Click on the text input box labeled Please Enter a Network URL; Type in udp://@238.1.1.1:5000 ; Click Play; The above assumes that there is a multicast stream on a multicast group with ip address of 238.1.1.1 … 3. Receive an HTTP/FTP/MMS stream. debug/DemoPlayer.o: In function ZN10DemoPlayerC2EP7QWidget': D:\NGFMS\My_Stuff\libvlc-qt_0.9.0_win64_msvc2012\examples\build-demo-player-Desktop_Qt_5_2_1_MinGW_32bit-Debug\src/../../demo-player/src/DemoPlayer.cpp:37: undefined reference to _imp___ZN9VlcCommon4argsEv’ D:\NGFMS\My_Stuff\libvlc-qt_0.9.0_win64_msvc2012\examples\build-demo-player-Desktop_Qt_5_2_1_MinGW_32bit-Debug\src/../../demo-player/src/DemoPlayer.cpp:37: undefined reference to _imp___ZN11VlcInstanceC1ERK11QStringListP7QObject' D:\NGFMS\My_Stuff\libvlc-qt_0.9.0_win64_msvc2012\examples\build-demo-player-Desktop_Qt_5_2_1_MinGW_32bit-Debug\src/../../demo-player/src/DemoPlayer.cpp:38: undefined reference to _imp___ZN14VlcMediaPlayerC1EP11VlcInstance’ D:\NGFMS\My_Stuff\libvlc-qt_0.9.0_win64_msvc2012\examples\build-demo-player-Desktop_Qt_5_2_1_MinGW_32bit-Debug\src/../../demo-player/src/DemoPlayer.cpp:39: undefined reference to _imp___ZN14VlcMediaPlayer14setVideoWidgetEP16VlcVideoDelegate' D:\NGFMS\My_Stuff\libvlc-qt_0.9.0_win64_msvc2012\examples\build-demo-player-Desktop_Qt_5_2_1_MinGW_32bit-Debug\src/../../demo-player/src/DemoPlayer.cpp:41: undefined reference to _imp___ZN14VlcWidgetVideo14setMediaPlayerEP14VlcMediaPlayer’ D:\NGFMS\My_Stuff\libvlc-qt_0.9.0_win64_msvc2012\examples\build-demo-player-Desktop_Qt_5_2_1_MinGW_32bit-Debug\src/../../demo-player/src/DemoPlayer.cpp:42: undefined reference to _imp___ZN21VlcWidgetVolumeSlider14setMediaPlayerEP14VlcMediaPlayer' D:\NGFMS\My_Stuff\libvlc-qt_0.9.0_win64_msvc2012\examples\build-demo-player-Desktop_Qt_5_2_1_MinGW_32bit-Debug\src/../../demo-player/src/DemoPlayer.cpp:43: undefined reference to _imp___ZN21VlcWidgetVolumeSlider9setVolumeEi’ D:\NGFMS\My_Stuff\libvlc-qt_0.9.0_win64_msvc2012\examples\build-demo-player-Desktop_Qt_5_2_1_MinGW_32bit-Debug\src/../../demo-player/src/DemoPlayer.cpp:44: undefined reference to _imp___ZN13VlcWidgetSeek14setMediaPlayerEP14VlcMediaPlayer' debug/DemoPlayer.o: In function ZN10DemoPlayer9openLocalEv’: D:\NGFMS\My_Stuff\libvlc-qt_0.9.0_win64_msvc2012\examples\build-demo-player-Desktop_Qt_5_2_1_MinGW_32bit-Debug\src/../../demo-player/src/DemoPlayer.cpp:74: undefined reference to _imp___ZN8VlcMediaC1ERK7QStringbP11VlcInstance' D:\NGFMS\My_Stuff\libvlc-qt_0.9.0_win64_msvc2012\examples\build-demo-player-Desktop_Qt_5_2_1_MinGW_32bit-Debug\src/../../demo-player/src/DemoPlayer.cpp:76: undefined reference to _imp___ZN14VlcMediaPlayer4openEP8VlcMedia’ debug/DemoPlayer.o: In function ZN10DemoPlayer7openUrlEv': D:\NGFMS\My_Stuff\libvlc-qt_0.9.0_win64_msvc2012\examples\build-demo-player-Desktop_Qt_5_2_1_MinGW_32bit-Debug\src/../../demo-player/src/DemoPlayer.cpp:87: undefined reference to _imp___ZN8VlcMediaC1ERK7QStringP11VlcInstance’ D:\NGFMS\My_Stuff\libvlc-qt_0.9.0_win64_msvc2012\examples\build-demo-player-Desktop_Qt_5_2_1_MinGW_32bit-Debug\src/../../demo-player/src/DemoPlayer.cpp:89: undefined reference to _imp___ZN14VlcMediaPlayer4openEP8VlcMedia' debug/DemoPlayer.o: In function ZN13Ui_DemoPlayer7setupUiEP11QMainWindow’: D:\NGFMS\My_Stuff\libvlc-qt_0.9.0_win64_msvc2012\examples\build-demo-player-Desktop_Qt_5_2_1_MinGW_32bit-Debug\src/./ui_DemoPlayer.h:81: undefined reference to _imp___ZN14VlcWidgetVideoC1EP7QWidget' D:\NGFMS\My_Stuff\libvlc-qt_0.9.0_win64_msvc2012\examples\build-demo-player-Desktop_Qt_5_2_1_MinGW_32bit-Debug\src/./ui_DemoPlayer.h:97: undefined reference to _imp___ZN21VlcWidgetVolumeSliderC1EP7QWidget’ D:\NGFMS\My_Stuff\libvlc-qt_0.9.0_win64_msvc2012\examples\build-demo-player-Desktop_Qt_5_2_1_MinGW_32bit-Debug\src/./ui_DemoPlayer.h:107: undefined reference to `_imp___ZN13VlcWidgetSeekC1EP7QWidget’ collect2.exe: error: ld returned 1 exit status, How to solve this error..I am using Qt 5.2.1. My platform for this post is 64-bit Windows 7 and I am using the tarball for Windows x64 (the latest version at the time of writing is version 2.0.7): ftp://ftp.videolan.org/pub/videolan/vlc/2.0.7/win64/ I downloaded and extracted the Windows x64 tarball to a directory C:\Qt\vlc-2.0.7 in my case. It would be great if we can take advantage of this library as it includes all of code necessary to decode video streams, deal with network sockets etc. C# (CSharp) Vlc - 23 examples found. But when i run the demo-player.exe the output is : “Starting C:\Qt\libvlc-qt\src\examples\build-demo-player-Desktop_Qt_5_5_1_MinGW_32bit-Debug\src\debug\demo-player.exe… QWidget: Must construct a QApplication before a QWidget Invalid parameter passed to C runtime function. I am using qt 5.1.1 on windows. But when i run the demo-player.exe the output is : “Starting C:\Qt\libvlc-qt\src\examples\build-demo-player-Desktop_Qt_5_5_1_MinGW_32bit-Debug\src\debug\demo-player.exe… QWidget: Must construct a QApplication before a QWidget Invalid parameter passed to C runtime function. VLC needs to be configured to lisiten for incoming streams on a specific port. So to do this I went to Start -> Control Panel\System and Security\System -> “Advanced system settings” -> Environment Variables and then under “System variables” I added C:\Qt\5.1.0\mingw48_32\bin to the end of the variable value, as illustrated in Figure 5. Have you ever thought "I can easily show this camera stream in vlc, why is there no ROS driver for it?". LibVLC Media List Managementexplained: covers the basics on setting up a playlist. LibVLC is an incredibly comprehensive and accessible code library for all of the features that are present in the cross-platform VLC multimedia player. UDP RTP – Example: ... – MPEG-4 stream: 0.5 to 4 Mbit/s – MPEG-2 stream: 3 to 4 Mbit/s from a satellite card, digital television card, MPEG-2 encoding card. Step 2: Download the vlc-qt library – I downloaded the “Official VLC-Qt Windows SDK and Source Packages”, which involved clicking the big green box. Please help. The problem is simple. The plugins folder is very important as it contains further dlls that are used by your build. The high-resolution output – running at 30 frames per second. singleLibVLC = new LibVLC("--verbose=2 --rtsp-mcast"); This gets me using UPD for both copies of stream but each stream is using a different pair of ports. Thanks. I have just added a high-resolution capture of my application running almost full screen and streaming live video at 30 frames per second in Figure 8. The "Stream Output" wizard dialog will open. It also has a blog to allow me to post new videos, articles and useful information that may not be in video form, Copyright 2015- Derek Molloy | All Rights Reserved | Powered by, Streaming Video using RTP on the Beaglebone Black, VLCWrapper – A Little C++ wrapper around libvlc, Step 3 – Make a few changes to the Demo Project. It seems that either VLC or the axis camera defaults to TCP if it can't find a way to use the UDP connection. dear, When i build the project i got these errors: C:\Qt\libvlc-qt\src\examples\demo-player\src\DemoPlayer.cpp:-1: error: undefined reference to _imp___ZN8VlcMediaC1ERK7QStringbP11VlcInstance’ C:\Qt\libvlc-qt\src\examples\demo-player\src\DemoPlayer.cpp:-1: error: undefined reference to _imp___ZN14VlcMediaPlayer4openEP8VlcMedia’ C:\Qt\libvlc-qt\src\examples\demo-player\src\DemoPlayer.cpp:-1: error: undefined reference to _imp___ZN8VlcMediaC1ERK7QStringP11VlcInstance’ C:\Qt\libvlc-qt\src\examples\demo-player\src\DemoPlayer.cpp:-1: error: undefined reference to _imp___ZN14VlcMediaPlayer4openEP8VlcMedia’ C:\Qt\libvlc-qt\src\examples\demo-player\src\DemoPlayer.cpp:-1: error: undefined reference to _imp___ZN9VlcCommon4argsEv’ C:\Qt\libvlc-qt\src\examples\demo-player\src\DemoPlayer.cpp:-1: error: undefined reference to _imp___ZN11VlcInstanceC1ERK11QStringListP7QObject’ C:\Qt\libvlc-qt\src\examples\demo-player\src\DemoPlayer.cpp:-1: error: undefined reference to _imp___ZN14VlcMediaPlayerC1EP11VlcInstance’ C:\Qt\libvlc-qt\src\examples\demo-player\src\DemoPlayer.cpp:-1: error: undefined reference to _imp___ZN14VlcMediaPlayer14setVideoWidgetEP16VlcVideoDelegate’ C:\Qt\libvlc-qt\src\examples\demo-player\src\DemoPlayer.cpp:-1: error: undefined reference to _imp___ZN14VlcWidgetVideo14setMediaPlayerEP14VlcMediaPlayer’ C:\Qt\libvlc-qt\src\examples\demo-player\src\DemoPlayer.cpp:-1: error: undefined reference to _imp___ZN21VlcWidgetVolumeSlider14setMediaPlayerEP14VlcMediaPlayer’ C:\Qt\libvlc-qt\src\examples\demo-player\src\DemoPlayer.cpp:-1: error: undefined reference to _imp___ZN21VlcWidgetVolumeSlider9setVolumeEi’ C:\Qt\libvlc-qt\src\examples\demo-player\src\DemoPlayer.cpp:-1: error: undefined reference to _imp___ZN13VlcWidgetSeek14setMediaPlayerEP14VlcMediaPlayer’ :-1: error: release/DemoPlayer.o: bad reloc address 0×20 in section `.text$_ZN7QStringD1Ev[__ZN7QStringD1Ev]’ collect2.exe:-1: error: error: ld returned 1 exit status, Hello ran through the tutorial and am receiving the same error as Johnny March 10, 2014 at 2:54 pm, Has a solution been found for this issue. vlc doesn't "see" udp stream after rtsp changing scale. Hi Derek thank you very much for your tutorial! It will eventually correct itself but not for about 10 seconds or so. Hi, i have the same error as Johnny March 10, 2014 at 2:54 pm and can’t found the issue. Conversion: The transcoding options box will appear. The demo-player project open in QtCreator 2.7.2 (Qt 5.1.0 32-bit). Can someone please upload the project demo-player “C:\Qt\libvlc-qt\src\examples\ there is a folder called demo-player”. i have a project: video streaming for Friendlyarm Tiny6410 i have to turn my KIT into Server to stream video to Laptop. You can see in the lib folder the .dll.a files that are the import libraries that are needed. I’m building a digital FPV system: HD camera in the multicopter, professional long-range WiFi link, with display on a laptop. Immensely useful and saves days of work at least. You could try and do this from first principles, but that is much too big a task; instead, you are better building on what is currently available. Multicast is used for one-to-many broadcast. any suggestions how to kill this latency? And, it is freely available. //QTextCodec::setCodecForCStrings(QTextCodec::codecForName("UTF-8")); Step 5 – Ensuring all Libraries are Present and Accessible, Driving a 8×8 LED Matrix using the Arduino, UDP Unicast and Multicast Streaming Video using the Beaglebone Black, http://www.videolan.org/developers/vlc/doc/doxygen/html/group__libvlc.html, http://www.videolan.org/vlc/download-sources.html, ftp://ftp.videolan.org/pub/videolan/vlc/2.0.7/win64/, VLC-Qt – “Quickly create a powerful media player”, Writing a Linux Kernel Module — Part 3: Buttons and LEDs, Writing a Linux Kernel Module — Part 2: A Character Device, Writing a Linux Kernel Module — Part 1: Introduction, http://sourceforge.net/projects/vlc-qt/files/, Resize a VirtualBox guest Linux VDI Disk under Windows Host, Custom Video Streaming Player using LibVLC and Qt, Edit the last two lines to direct LIBS and the INCLUDEPATH to fine the libaries and headers for libvlc-qt. Opening this within QtCreator gives the following output as displayed in Figure 1. (if not, you can build it from the source code) Some further topics are covered here: 1. In some HD channels video lagging and it stop but the sound is okay and continue. In “Destinations”, choose “RTP /MPEG Transport Stream” and click the “Add” button; In the “Address” box, enter the required … These are the top rated real world C# (CSharp) examples of Vlc extracted from open source projects. In VLC 1.1.11 media -> straming \/ capture device tab - drop capture mode to: desktop \/ set 25 fps \/ pressed "stream" button 1st option window: source was "screen://" - i press next button 2nd option window: destination was setted to udp and pressed to the "add" button -> … The problem with these solutions is that they are using VLC to display the video and you are effectively without any type of control of the application. The output from the Application Output Pane is: And it is possible for me to connect to my RTP video stream using the Open Local File button and to my UDP (Unicast or Multicast) streams using Open URL. 2) Will the software boneCV.cpp which includes opencv libraries works well with the latest BBB with Debian Jessie images? In a multicast configuration the Encoder/Gateway sends the UDP stream to a multicast group, such as: 238.1.1.1. Here is the stack of calls: - release_input_thread( p_mi, true ); - input_Close( p_input_thread ); - input_Join( p_input ); - vlc_join( p_input->p->thread, NULL ); - vlc_sem_wait (&handle->finished); // block forever This does … My libvlc-qt folder is c:\Qt\libvlc-qt\. I’m not sure how useful the first link is under Linux as it is set up for Visual Studio, but the second link uses Qt which means it should be fine under all platforms. i use live555 on Ubuntu and it is written by Qt, my live555 libraries is installed in: /usr/lib/live But i dont know how to add live555 into my Qt project, please help me ! My build folder is c:\Qt\libvlc-qt\src\examples\build-demo-player-Desktop_Qt_5_1_0_MinGW_32bit-Debug\src\debug: – Copy the libvlc-qt-widgets.dll and libvlc-qt.dll files from the directory C:\Qt\libvlc-qt\bin into the build folder. Press on the "Next" button to go to the "Destination Setup" area. In most cases the first thing we do is ask the customer to confirm that their setup works with VLC, because if it works with VLC then their issue is most likely not IP networking related. Okay, after this you should now have an executing version of the demo-player project within QtCreator. I amazed with the research you made to create this actual post extraordinary. However, some complex operations can only be done from the command line and there are situations in which you don't need or want a GUI. To make life easy I would recommend using the pre-built versions. Great guide! I will have a video soon available of my blog series on streaming video in place soon. vlc -vvv video2.mp4 - … VLC will convert the video on the fly to a new … When I read a simple .mp4 file (read binary and then converting the string to byte … Configure the details for the chosen streaming protocol. On the GNU Radio side, I created a simple flow graph where an UDP source is connected to an UDP sink. please send me a short … Generate a .lib for using libVLC on Windows(before libVLC 2.1.0) It would be great if we can take advantage of this library as it includes all of code necessary to decode video streams, deal with network sockets etc. Thanks, Figure 3. I think this is the answer you are looking for: STREAM VIDEO OVER A LAN USING C#.NET , use … Transcode a stream to Ogg Vorbis with 2 channels at 128kbps and 44100Hz and save it as foobar.ogg: % vlc -I dummy -vvv input_stream --sout "#transcode{vcodec=none,acodec=vorb,ab=128,channels=2,samplerate=44100}:file{dst=foobar.ogg}" Transcode the input stream and send it to a multicast IP address with the associated SAP announce: … Thanks. Hi! The "monster" image that is associated with your comment is auto-generated -- it makes it easier to follow the conversation threads. Click Next to set destination. I downloaded source version VLC-Qt 0.9.0 and use cmake 3.1.0 rc1 gui to complie but not work. VLC then connects to this group on a specified port and plays the stream(s). VLC then connects to this group on a specified port and plays the stream(s). Note, it will not run yet! Invalid parameter passed to C runtime function. It seems to happen on any resolution as well so I don’t know what to think. I extracted this to a folder in my c:\Qt directory called libvlc-qt. Step 1: Download the version of LibVLC for your platform. I have everything working as it should but the video hangs up if I move the camera around too much or if make too much of a scene change. Figure 7. Here is the complete description of VLC's command line and how to use it. Setting the Windows Environment Variable PATH. You can add the other directories to your path here, but I am going to just place the dlls in the build folder. So maybe somebody works with VLC for videobrodcasting I would like if you are Advise any examples. You can rate examples to help us improve the quality of examples. This video describes how we can stream media using VLC Media player over the RTP Protocol. I try to play UDP stream by LibVLC in Android Box but I have some problem. According to the VLC streaming matrix, UDP limits the available containers to MPEG-TS and Raw. I copied these from my folder C:\Qt\vlc-2.0.7 which I discussed in Step 1. Please help! Copyright 2020 AdvancedDigital Inc. All Rights Reserved. However, my program crashes at this line _instance = new VlcInstance(VlcCommon::args(), this); Please advice. You can even download the source code for VLC itself from: http://www.videolan.org/vlc/download-sources.html. Figure 8. Hi, is it possible to add auido in to this video streaming? Figure 1. I have the demo up and going now. The above assumes that VLC on your computer is listening on an incoming port 5000 for UDP streams. Please make sure that your encoder/gateway is sending to this port and that all proper firewall rules are in place. I am achieving a successful compilation. QtCreator has some very nice IDE features, such as editing the user interface (See Figure 3). Thanks for all the AMAZING tutorial. It also integrates associated documentation, datasheets and tools to allow you to get the best from the video series. For those not familiar with VLC (VideoLan), it is a free multimedia player supporting most file and streaming media formats. with a less (or perhaps more) monstrous version, add an image at, This site brings together all of the video content on the Derek Molloy YouTube channel and structures it so that you can follow the videos as lessons. Ahh missed the part where you recompiled vlc-qt from source. My output is captured in Figure 6. So, that is it. The great thing about open source is that someone has probably tried to do what you are looking to do before and has written some code. I investigated a little, and found what is blocking when calling libvlc_media_player_stop(?). Having no idea what Raw is (I mean in bits and bytes) I chose TS with H.264 video and AAC audio codecs. Thanks. I’m looking for a line-scan camera that can run at 200 fps (lines) or faster. Finally, I press the button on the bottom left-hand side (I think it is a hammer) and as you can see in Figure 4. Ask vlc to play rtsp url. The description of the functionality available in LibVLC is available here: http://www.videolan.org/developers/vlc/doc/doxygen/html/group__libvlc.html. Editing the GUI within QtCreator. vlc -vvv video1.mp4 --sout=#transcode{vcodec=h264,vb=800,acodec=mpga,ab=128,channels=2,samplerate=44100}:udp{mux=ts,dst=224.0.0.1:1234} But when I start a 2nd vlc instance with: Code: Select all. This is the very first time I frequented your website page and thus far? Hi, with reference to the demo project, I have tried to create a vlc instance on my QT program. ), Thank you very much for these tutorials. Cheers, Its nice However, you dont have access to all the control you would need. You need to be quite comfortable with command lineusage to use this. So, in Figure 7 I connect to my unicast UDP stream (see previous posts) by entering the address: udp://@:1234 into the “Open URL” pop-up dialog box. I tried lot's of option but it didn't work. For the multicast streaming, the address used is usually from the range of local administrative multicast IP addresses (e.g. I am able to receive the stream videos in my program, The source code for receiving the streaming video is given below (Which does beg another another question or connecting to the stream in daytime hrs but leaving the BBB to do its capture and opencv processing separately. You can even downl… but when i have use an MPTS stream, i don't know how???? its working. There are several examples on how to use LibVLC within C++ and there are also several wrappers that are available for C++ to help make this process easier. So this post covers the area of building your own application to view the video streams. And we can! I have a hybrid setup for this project and there are good reasons for this that I don’t want to go into here. For example I need to display the frame rate and I cant. Please refer to the Doxygen documentation, which is the reference documentation. It would not be an exaggeration to say that 99% of all support questions are in fact related to incorrect networking setup. Put your Management and Streaming Ports on Different Networks, Using VLC with Multicast and Unicast UDP Streams, Introduction to FFMPEG for Broadcast Engineers, Put Your Existing UDP/RTP Encoders on the Internet. and how to install. 1) The examples shown here is capturing images or videos through BBB, but sending it to a desktop, through network communication, and displaying it in the display of desktop.Is it possible to capture images or videos through BBB, and display it on an LCD display, interfaced to BBB, through its HDMI port, by doing a little modifications in the associated scripts. Make sure that the documentation matches the LibVLC version. Does anybody have an idea why? I downloaded the “Official VLC-Qt Windows SDK and Source Packages” (http://sourceforge.net/projects/vlc-qt/files/), when I extracted, the folder isn’t contain the sub-folder /lib, /include, /bin, /src like you. In my scenario, I am receiving raw bytes from UDP (a stream of strings) and then again I am writing that stream to another UDP socket where VLC is listening. In my case I am going to change the frame title to “Beaglebone Video Streamer”. So I found it, but I have exceptions on unmanaged code when I've tried to get components from API. This forum is about all development around libVLC. If you want to use TCP you have to set that option in your ArrayList that you feed to your own libvlc. Code: Select all [00007f2f440011f0] x264 encoder: using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX [00007f2f440011f0] x264 encoder: profile Constrained Baseline, level 3.0, 4:2:0, 8-bit [00007f2f440011f0] x264 encoder: final ratefactor: 38.99 [00007f2f440011f0] x264 encoder: using SAR=1/1 [00007f2f440011f0] x264 encoder: using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 …