Frequently Asked Questions

Version 3.0.3
Sep 9, 2008

Q1. Which media player I must have been installed to view channels?

A: We suggest that you use Windows Media Player 9 or above or latest RealPlayer to play the stream. Please check the version of your player. Other players (vlc, mplayer) may be usable, but you should open it and play the stream manually. In this case, you see that SopCast is buffering and starting to play, you can specify the url: http://localhost:8912/ to the player URL field. For a rm (rmvb) stream, in RealPlayer, you can specify the url: http://localhost:8912/tv.rm.

If you have opened more than 1 SopClient, the player port will be increased automatically.

Back to Top

Q2. Get "Can not access sop service" error message after clicking channel and trying to start?

A: You maybe have bad connections to SopCast serivces and the SopPlayer didn't initialize normally. You can restart SopPlayer or re-open the WebPlayer page and have a try.

Back to Top

Q3. Get "Can not retrieve data" error message after buffering?

A: In this case, you get peers list successfully and exchange stream data with them, but they all have no right data to feed you, your usually have a lower buffer, if this condition lasts so much time, you will get the error message and the channel stop buffering.

This problem will occurred in some condition as below:

  • You have bad connections to all peers.
  • All peers have no right data because of time synchronization.
  • The SopServer have quit abnormally.
  • Too lower QC (quality of client network).

Back to Top

Q4. RealPlayer has no sounds or the sound does not synchronize with the video?

A: This problem occurred often when streaming a rm/rmvb video, and seem a bug of RealPlayer. You can resolve this problem with the following step:

  • Click the “opened in external player” button at bottom right corner of SopPlayer.
  • Smoothly move the Real player process bar to and fro when the video is playing

Back to Top

Q5. How long time is buffering time usually?

A: It depends on your Internet access condition and the QC (quality of client network), This period will last about 10-60 seconds usually.

Back to Top

Q6. What firewall policy will be used when we using SopCast?

A: We use the P2P technology to transfer the media content. That means when you get media content from other nodes, you also share your data to others. In order to get a better quality of stream, you should open some necessary ports to permit inbound connection.

For SopPlayer, recommends open 3900-13900 ports for inbound connections.

For SopServer, must open 3900-4900 ports for inbound connections.

If your personal firewall has the automatic configuration function, for example Symantec Internet security, Microsoft internal firewall with the XP sp2, select allow or permit if you see the information to ask you whether permit SopCast.exe to access the Internet or not.

Back to Top

Q7. How can I monitor the quality of a channel?

A: Two parameters could be used to monitor the quality of a channel. One is the quality of source (QS) and another is the quality of client network (QC). QS stands for the quality of the channel source. The low QS value means the SopServer has the poor quality to receive the channel content and it will result in the poor quality for all of the views. QC stands for the average quality for the watcher receiving the channel contents. High QC value means the p2p network is great and every watcher can receive most of the channel content in its buffer.

Your can click the blue “quality bar” on WebPlayer or SopClient to see the quality of a channel.

Back to Top

Q8. Why the percent of my buffering shows high, I still can not watch the channel with the high quality?

A: Perhaps the channel has a bad QS, or the channel just lost feed.

Back to Top

Q9. Can I use SopCast to setup a personal channel. If can, how to?

A: Of course, you can! This is one of main features of SopCast. Through the P2P technology, you can easily support maximum 100 thousands persons to watch your channel at the same time using a single computer. We want to make the SopCast the best TV Station for everyone.

below is the simple steps to become a broadcaster:

1. Sign Up in SopCast website.

2. Login and enter MySop system on SopCast website.

3. Register Channel.

4. Add your to a channel group

5. Download SopCast For Windows
(prepare channel content, such as video files or real time stream.)

6. Open SopCast Software, login with your SopCast account

7. Click “My Server” tabs, fill out necessary fields

8. Click “Start” to publish your channel.

9. Your channel will be displayed on channel list after about 5 minute.

For more information, please read other documents.

Back to Top

Q10. How to build a STABLE channel?

A: To make a channel stable, you must meet two requirements: One is the stable source for the channel. SopCast support two kinds of source, files or Media Server. You can build a local source by playing stream media files (asf, wmv, rm, rmvb, mp3). You can also retransmit a stream from Microsoft Media Server or Real Network Real Server.

The second is the stable and adequate internet connection. To build a good quality channel, you’d better place your server in an IDC (Internet Data Center) for the guarantee bandwidth. For a stream of 300Kbps, we limited the maximum bandwidth of the source to 2Mbps and the actual band it will use varies from 1M to 2M. It can serve 100 thousands audiences in such a configuration. So if you have the connection 256Kbps or 512Kbps, we suggest you to make a about 100-200Kbps channel.

Back to Top

Q11. I am very interested in SopCast, how can I contribute to you?

A: P2P means everyone contribute to the network, to others and others contribute to you in return. The more persons watching a channel, the more fluent channel you can get. That means you can watch the channel fluently, without stopping, waiting or mosaic. So watching your favorite channels is the best contribution.

If you can provide the good quality channels, it is also very acceptable. Please write to us and we are very happy to publish your channels.

In order to make SopCast better, Donation is welcomed.

Back to Top

Q12. How to get answers to more questions?

More questions, please send to or seek help on SopCast forum.

Back to Top