Free Movies Online 1

Streaming technologies have made listening to music or watching free movies online (Click Webpage) on the web as easy as turning on the radio or TV. Here is how the technology works.

The very first music and movie files you can find on the web were just short clips because you had to download the entire file before you could play it. Right now, in contrast, you may start playing the file as soon as the first bytes begin to arrive... as a result of streaming.

This immediacy is possible because streaming does not send files on the net the same since several other files are sent. It uses another protocol.

A protocol is a group of rules defining how two computers connect with each other and how they send each other data.

Most data that is sent throughout the internet is first broken up into packets (small blocks of data). The packets are sent separately and are the rejoined at their destination to ensure that the receiver gets the whole file.

The sending of most data on the web is governed by a group of rules called the Transmission Control Protocol (TCP). Streaming however uses the User Database Protocol (UDP).

These two protocols are quite different. The crucial difference is in how they check for errors.

If one packet gets damaged when downloading will be controlled by TCP, downloading will be suspended while that packet is resent. That way, once the download has been completed, you can be sure that you've got the entire data file.

Whenever you are streaming files, on the contrary, UDP allows packets to get lost now and after that without interrupting the downloading. This is fine because, when an occasional packet is lost, you are unlikely to notice any interruption to the music or movie. But if everything froze very briefly while a lost packet was being resent, you probably would notice the interruption.

With streaming technology, you should not have to wait for files to be downloaded entirely before you can begin listening to audio or watching a video. You can listen to a concert on the other side of the world in real time, make a video call or watch a film just like on television.

Streaming video works in a similar way to streaming audio, except that the video must be divided into its separate audio and video components when it really is within the buffer in the RAM.

The server that holds the video for streaming may have a video capture expansion card which could capture either a live feed from a video camera or possibly a pre-recorded video. The capture board turns the analogue signals it receives into digital data and compresses it.

At the same time, it employs a trick to avoid having to capture more data than it needs so that you can make transmission easier.

When the camera used to record the video is stationary, ie, it's not panning, the total amount of data created can be reduced. This can be done because all moving images are made up of a series of frames (still images) that change in rapid succession to offer the illusion of continuous movement. The rate may be 30 frames a second which gives the video a smooth look.

The compression system reduces the number of frames needed by comparing adjacent frames and only taking account of pixels that change from one frame to another. It does this by establishing what the background looks like.

As long as the camera remains still, only the changes in the frame, such as the movement of the actors, have to be transmitted. The background only has to be transmitted again after the camera starts to pan and the background changes.

Video streaming will likely skip frames when your Internet link is slow, which may make the video jerky. Thus the faster your connection, the smoother the video will be.

When your computer receives the video signals, it's going to decompress them and load them into a small buffer in RAM as it does for audio.

At this point the signals are split into separate video and audio components which are sent to the video card and sound card respectively, whence they are output to your monitor and speakers so you can watch the film and hear the sound-track.