Cayin SMP-PRO4 Oynatma Kılavuzu - Sayfa 4

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CAYIN SMP Player Video Playback Guide

2. About Digital Video Files

Normally, digital video is stored into a media card (such as an HDD or CF) in the format of

digital files. The compressed digital video data will be converted into some popular file formats,

such as AVI, MPEG‐PS or MP4. These file formats are also called encapsulated formats or

container formats. Some container formats are named the same as codec (ex., WMV, MPEG),

so users might get confused when talking about these terms.

AVI is a kind of container format that will convert video/audio codec, respectively.

A container format could, in some cases, convert wrap multiple kinds of video data compressed

by different codec. However, this is not always true. Some containers can only convert

video/audio data compressed by specific codec.

A container format can help the program in a media player to locate the right codec of

video/audio and provide necessary or extra information (such as length of video files, frame

rate) in the file header for decompressing files. It also can help a media player program

synchronize a time stamp for both video and audio so that video and audio can play

synchronously.

Some complicated container formats can process many tasks and provide lots of codec

information to media players. On the contrary, some containers, used in special applications,

are so simple that they provide only basic information for audio‐video synchronization. For

example, MPEG‐TS, the container format for digital broadcasting, is quite simple, because this

task requires playing streaming video from any segment of it. This simple container format can

reduce the complexity of the file header, which enables media players to start or resume

playing video (or streaming) files from any segment without starting from the very beginning of

each file.

CAYIN's SMP players support the following container formats (file formats):



MPEG/MPG/VOB: MPEG Program Stream (MPEG‐PS) and MPEG Transport Stream

(MPEG‐TS). MPEG‐PS is usually used for MPEG‐2 files or DVD. MPEG‐TS is a standard

digital broadcasting format for digital TV and also is used in CAYIN's CMS server's RTB

function.



MP3: Mpeg audio container format