- Why there is no video in the preview window?
- 1. If the firewall settings on your PC/laptop block streaming. Try turning off firewall to check if this fixes the problem. If yes, adjust the firewall settings to open the streaming ports.
2. If the browser does not support the VLC plug-in or if VLC was properly installed.
- Why does the video have combing or interlaced lines, especially at the edge of moving objects or when the scene is panning?
- This is called "interlaced noise." It is present in the interlaced video signal from your HDMI or component video source. Turn on the de-interlace function on your streaming receiver or VLC to remove these lines. F239/F239+ do not support de-interlace at encoder side.
- Why is my streaming video displayed in black with no audio?
- F239/F239+/SE510 do not support streaming or recording of protected content.
1. If your HDMI video source has HDCP protected content. Most Blueray playersoutput HDCP-protected video.
2. If your composite or component video source has Macrovision protected content. Most DVD players ouput Macrovision-protected video.
- Why is my streaming video displayed in blue?
- Please check if the cables have become loose or if the video source has been turned off or is sending a signal outside of F239/F239+ specifications.
- Why is there visible noise at the edge of the video?
- Many video signals have embeded data in the last few pixels near the edge of the picture. This data is shown as blinking or black-or-white noise in the video and can be masked by turning on the overscan feature on your monitor or TV. These settings may be titled Just Scan, Pixel Mapping, Screen Fit, or Dot by Dot.
- What is multicast streaming?
- Multicast streaming prevents your bandwidth requirements from increasing linearly as the number of clients or receivers increases. To accomplish this, the routers and switches must be configured to support multicast. This allows you to stream to hundreds of clients and is only limited by your local network infrastructure. Multicast does not work over the Internet and is most often deployed in enterprises, campuses, and local area networks. Multicast does not work well in WIFI networks due to the limitations of most WIFI access points in the market.
- What is RTMP streaming?
- RTMP streaming requires a RTMP server or cloud service to transmit data from the F239/F239+/SE510 to clients and receivers. The number of clients you can support is mostly defined by the processing power of the RTMP server.
Notable RTMP servers are the Wowza Streaming Engine and Adobe Media Server.
Internet OTT providers, such as UStream, Youtube, Twitch, and Akamai, support RTMP streaming.
- What is RTSP streaming?
- RTSP streaming is prevalent in the video surveilance industry. IP cameras must support RTSP streaming to conform to ONVIF specifications and be compliant with NVR products.
- What is HLS streaming?
- HLS is short for HTTP Live Streaming. Unlike other streaming protocols, HLS uses a HTTP to carry video and audio and, therefore, is very unlikely to be blocked by firewalls. This distinguishing feature makes it increasingly popular when streaming content across the Internet. But like RTMP, HLS also requires a centralized web server or cloud service to send video and audio content to clients. The maximum number of clients is defined by this web server.
- What equipment and software are needed to deploy multicast streaming?
- Your routers and ethernet switches must support IGMP snooping and query. VLC, AVerCaster Player, AVerReceiver, and IP set-top boxes must support receiving and display of multicast streaming.
- What equipment and software are needed to deploy RTMP streaming?
- You must have a RTMP server, most likely purchased from Wowza or Adobe. Cloud service providers, such as Amazon AWS and Microsoft Azure, also provide RTMP services.
- How many streaming channels are supported?
- F239/F239+ supports two independent streaming channels in Duet mode. In Splitter mode, one video signal from an HDMI or component input can be streamed to two different destinations using different streaming protocols and encoding profiles.
- How much network bandwidth is required to stream from F239/F239+?
- The network bandwidth required is determined by the video and audio bit rate of your encoded profile.
If you use VBR encoding, the minimum network bandwidth should be twice the total video and audio bit rates. VBR works best when high video quality is crucial and network bandwidth is not an issue. For example, if you are streaming within a local area network.
If you have low network bandwidth with an upper limit, as is the case for most Internet streaming, CBR encoding is recommended.
- How many clients can receive TS over TCP streaming from F239/F239+?
- The cummulative encoding bit rate for all clients must be below 75Mbps. For example, if the video and audio bit rate combined is 5Mbps, TS over TCP can support 15 clients (5 x 15 = 75).
- Why does my streaming receiver/decoder not receive SAP from F239/F239+/SE510?
- Please check:
1. If your firewall settings block SAP. Turn off the firewall to check if this fixes the problem. If yes, change the firewall settings to open the SAP port.
2. If your PC/laptop has second network interfaces. Turn off any other interfaces until only one remains.
- Why is my streaming quality very poor and shows lag, stutter, blur, or other visible or audible distortions?
- Please check:
1. If the network equipment, such as routers, switches, or cables, need to be replaced.
2. If the network bandwidth is shared with other applications (video conferencing, web browsing, instant messaging) and shows signs of congestion. Use speedtest.net by Ookla to measure the effective network bandwidth before streaming.
3. If the encoding bit rate is too low to maintain good quality.
- What is the streaming latency of F239/F239+/SE510?
- Please refer to the latency white paper available for download from our website.
- Which streaming protocol should I choose?
RTMP HLS RTSP TS over TCP TS over UDP UDP Multicast RTP Multicast RTP Unicast Number of clients: 1 v v v v v v v v Number of clients 2~5 v v v v v Number of clients 6~20 v v v v v Number of clients 21~100 v v v v Numer of clients 101~500 v v v v Number of clients > 500 v v Stream to Internet v Stream to Intranet v v v v v v v Stream to WIFI v v v v v v Stream to Youtube v Stream to Ustream v Stream to Akamai v Stream to CDNVideo v Require ContentDistribution
Network (Wowza, AMS, AWS,
Azure, Apache, IIS)
- How do I find the IP address for my F239/F239+?
- Please download AVerCaster Manager from our website or the CDROM provided. Install and run AVerCaster Manager and search the local area network to obtain the IP address for your F239/F239+.
- Why can't I find F239/F239+ using AVerCaster Manager?
- If your F239/F239+ is in the same local area network as the PC/laptop running AVerCaster Manager. If they are on different router ports, AVerCaster Manager will be unable to find F239/F239+.
- I forgot my username or password for F239/F239+. What should I do?
- Locate and select the F239/F239+ for which you want to reset the username and password in AVerCaster Manager. In the Help menu, Reset Account and Password tab, insert the serial number for the F239/F239+ to reset the username and password to the default.
- Do F239/F239+/SE510 support scrambled or encrypted streaming?
- No. Encrypted and scrambled streaming are not yet supported. If you have DRM requirements, please consider the AVerCaster Pro series.
- Why can't I open the web management interface after clicking IP address in AVerCaster Manager?
- Please check if the IP address for F239/F239+ is within the same subnet as your PC/laptop. For example, if F239/F239+ has an IP address 192.168.3.1 and your PC/laptop has 10.1.9.1, you will be unable to connect to the web management interface for F239/F239+. You can change the IP address for either F239/F239+ or your PC/laptop to connect within the same network.
- What is the purpose of having two LAN ports?
- These two LAN ports are independent network interfaces and have different MAC and IP addresses. These allow you stream to two different networks. For example, you can live stream in multicast to classrooms on the campus network and also to Youtube Live via the Internet.
- How should I choose among the built-in encoding profiles?
- If you are streaming to Youtube, Ustream, or Twitch, please choose one of their encoding profiles as these are set to their respective recommended encoding parameters.
Otherwise, select according to the limit of your network bandwidth and video quality. Generally speaking, higher resolution and bit rate equates to better quality and also consumes more network bandwidth.
- Why do F239/F239+/SE510 have an IP adress in the 169.254.x.x range?
- Most likely, you do not have a DHCP server to automatically assign an IP address to F239/F239+/SE510. If you connect your PC/laptop directly to F239/F239+/SE510 using a CAT5/CAT6 cable, you may also be unable to obtain an IP address from the DHCP server.
In these situations, F239/F239+/SE510 will randomly assign itself an IP address in the 169.254.x.x range. This is specified in RFC3927 "Dynamic Configuration of IPv4 Link-Local Addresses".
You are still able to multicast stream without any problems.
- Is there an SDK or API for the integration and remote management of F239/F239+?
- F239/F239+ uses a web API in HTTP and XML formats. This is similar to the API used by Facebook and Google. By using this API, you can integrate F239/F239+ management into a central system or application. Changing settings, initiating streaming, and other adjustments are possible from your customized application or server. Contact FAE or a sales representative for web API documentation.