What exactly is an SMV Format?

November 21, 2011
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What exactly is an SMV Format?

SMV, or SigmaTel Motion Video is a multimedia format that you can use to combine an audio and video file together for maximum portability. With the use of SMV Formats, you could combine an audio file using a video track with high precision, controlling the sets of from frame rate, towards the number and order of individual video frames. By researching the kinds of files that defines an SMV file, one can learn the right way to effortlessly combine an Audio file with a Video.
The SigmaTel Motion Video Format

An SMV File is often a media file which has three other kinds of files there. A few components of an SMV file will be the JPEG stream, the WAV file and the file header. Many of these elements communicate using the media player processing them to create both an audio and video output. You can utilize most the format on most Multi-media players. SMV format is usually used to package songs using music videos.

An SMV file is made up of three sections:

  • A .wav apply for the audio stream, having a conventional WAV header.
  • 2. An SMV header, described below.
  • 3. An range of .jpeg files with the video stream, with headers, each prepended using a 24-bit (3 byte) little-endian value representing the length of the style and buffered by the end with nulls.

The WAV File

The audio stream the SMV format uses is really a regular IMA WAV audio file. Ever since the SMV format starts off with a WAV file, Mp3’s or converters usually detects it as being a WAV file. Therefore, a demuxer implementation must be used to the SMV header to find out if it is an SMV.

A WAV file is definitely an audio file which is suitable for Linux, Windows and Macintosh computers. The WAV files you’ll probably encounter are uncompressed, although it is quite possible to reduce them in size. As they are usually uncompressed, they are utilized as high-quality templates from which to make lower-quality, smaller copies. Some user gives thought that WAV files can impractical or very hard to share because files can be extremely large. The maximum quality from a WAV file is 4 Gigabytes.

 

The File Header

The file that ties SMV together is referred to as the “header.” The header is an easy text file made up of file settings. The header tells the media player the amount of frames it needs to display a minute, the amount of frames will be in each JPEG image, the width and height in pixel from the video, along with the final number of frames. Media player are only restricted to process the WAV file which it contains If the SMV file is missing the header, or maybe the header is corrupt. At that time, The Film wont function properly.

 

The JPEG Stream

The JPEG stream from the SMV file is commonly a compilation of JPEG images. Each JPEG from the stream is turn including things such as several individual images. Each JPEG image incorporates a 24-bit data block associated with it. These 24-bit blocks of internet data teach you the transaction the frames need to be played in. These individual images these include often known as “frames”. The media player you use will learn the SMV file and combines these frames into the video stream.

 

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