About IBPvo

Record a TV show from anywhere, watch the recording from anywhere whenever you want.

IBPvo combines an online VCR capability with Logistical Networking. It will record a show and then store the data into IBP depots using the LoRS tools. The LoRS tools generate an exNode, which is then emailed to the user. A copy of the exNode is also stored into a private folder for the user and IBPvo will keep the exNode refreshed automatically.

How it works

System Requirements

In order to download the files, the user will need to have a computer with the LoRS Tools installed. The tools are currently available for Linux, Solaris, and Mac OS X.

The files produced by IBPvo are playable on any system that has the DivX Codec installed. This codec is available for Windows, Mac OS, and Linux. For Linux users, the codec comes with mplayer, a popular linux movie player. Windows users will need to download the codec. Once installed, Windows Media Player will be able to play the video. Mac users wishing to use QuickTime will need to download the DivX codec for Mac, which is packaged with a program called "DivX Validator" which "fixes" videos so that Quicktime will be able to play them.

Recommended Settings for lors_download

When IBPvo uploads a video file, it breaks the file into 512 KB blocks and then DES encrypts each block and then checksums the block. Groups of blocks are then sent to three IBP depots. The exNode knows where each block fits within the file.

When retrieving the file, the lors_download tool can try to maximize the throughput up to a point. Because the file is encrpted, the lors_download tool must use a lot of CPU cycles to decode the video. The time spent decrypting typically lowers the observed throughput by half.

As usual, having a more powerful the CPU, more physical memory, and more bandwidth available will improve your download performance. The table posted below provides general guidelines based on a "standard" PC with a 1.5 GHz CPU running Linux or a Macintosh G4 running OSX:

Internet Connection	Threads	Blocksize	Cache	Progress	Redundancy
Dial-Up/ISDN	1	512k	1	1	1
Cable/DSL/T-1	3	512k	20	6	3
less than 100 Mbps	6	512k	20	9	3
100 Mbps and over	10	512k	20	15	3

Note: Mbps is megabits per second. To convert to MBps (megabytes per second), divide the Mbps by 8.

Estimated File Size

The size of your video file will depend on the combination of the encoding bitrate and the program duration:

Encoding Bitrate	10 Minutes	15 Minutes	30 Minutes	1 Hour
910	70 MB	105 MB	210 MB	420 MB
2000	154 MB	231 MB	461 MB	923 MB
3000	231 MB	346 MB	692 MB	1.38 GB
3500 (Recommended)	269 MB	404 MB	807 MB	1.62 GB
4000	308 MB	461 MB	923 MB	1.85 GB
5000	385 MB	577 MB	1.15 GB	2.31 GB
6000	461 MB	692 MB	1.38 GB	2.77 GB
7000	538 MB	807 MB	1.62 GB	3.23 GB
8000	615 MB	923 MB	1.85 GB	3.69 GB
9000	692 MB	1.04 GB	2.08 GB	4.15 GB
10000	769 MB	1.15 GB	2.31 GB	4.61 GB

Note: IBPvo cannot currently create files greater than 2GB. If you believe that your recording will exceed this limit, please select a lower bitrate to avoid truncation.

How do I sign up?

Click here to sign up for an account

Thanks

We would like to thank the author of vcr, a text-console video recorder, that IBPvo uses to record the TV shows.