Video format

Generally format is container that contain endoced data of the video codec and audio codec.

– Format

• AVI
• Quick time : This is made for apple’s macintosh computer’s video.
• ASF ( advanced Streaming Format) : ASF is microsoft’s streaming format that support about audio, video, slide show and synchronized events.
• MPEG (Moving Picture Experts Group) : MPEG professional video group that enact about compress of digital video and digital audio.
• WMV (Windows Media Video) : It’s for web streaming format.
• FLV
• TS
• RM
• MKV

– Reference :

http://blog.kollus.com/?p=31

http://kin.naver.com/

http://www.boilsoft.com/avi-mpeg-rm-joiner.html

http://cdn3.reelstatic.com/wp-content/uploads/video-formats-codecs.png?7f0e20

SCREEN RATIO / RESOLUTION

SCREEN RATIO 

Computer monitors have traditionally possessed higher resolutions than most televisions.

As of July 2002, 1024 × 768 Extended Graphics Array was the most common display resolution.

Many web sites and multimedia products were re-designed from the previous 800 × 600 format to the layouts optimized for 1024 × 768.

RESOLUTION

Proper resolution of a file is critical in the sign business. A low resolution file will make a sad looking banner. Conversely, a super-high resolution file is overkill for a business card design.

Let’s start with a simple definition: resolution refers to the sharpness of an image. Most often, resolution is referred to as dots per inch or dpi.

– Reference :

Bitmap and Vector Images

http://weblog.200ok.com.au/2008/12/choose-your-resolution.html

Frame rates

Frame rates in film and television.

Standard

– NTSC : 30p

– PAL, SECAM : 25p

– 25p (50 interlaced fields = 25 frames) :

• It is the standard video field rate per second for PAL and SECAM television.
• The 24p frame rate is also a noninterlaced format, and is now widely adopted by those planning on transferring a video signal to film.
• Film and video makers use 24p even if their productions are not going to be transferred to film, simply because of the on-screen “look” of the (low) frame rate which matches native film.
• The 24 frame/s rate became the de facto standard for sound motion pictures in the mid-1920s.

– 30p 

• For people in the U.S., Canada, and countries that follow the 60hz NTSC video standard, 30p may be your best bet.
• It’s a faster frame rate than 24p and your HDTV or computer monitor likely refreshes at 60hz making the 30p frame rate a nice match for your equipment.

Follow frame rates,

This video is compare about difference following frame rates.

This is very well-accounted video about frame rates.

– Reference :

http://www.mobileburn.com

http://www.steves-digicams.com/

COMPRESSION

– Codec : ( Compressor + Decompressor )
Change the Audio or video’s data change over to digital and change again that data to play.

Encoding is reducing file’s size and decoding is restoration original play data.

Codec is Technique that Compress video and play compressed video.

Compression is the reduction in size of data in order to save space or transmission time.
This kind of compression can reduce a text file to 50% of its original size. Compression is performed by a program that uses a formula or algorithm to determine how to compress or decompress data.

Graphic image file formats are usually designed to compress information as much as possible.
Graphic image compression can be either lossy or lossless.

Consumer video is generally compressed using lossy video codecs, since that results in significantly smaller files than lossless compression.

While there are video coding formats designed explicitly for either lossy or lossless compression, some video coding formats such as Dirac and H.264 support either.

Some video coding formats are documented by a detailed technical specification document known as a video coding specification.

Some such specifications are written and approved by standardization organizations as technical standards, and are thus known as a video coding standard.

Video codec :

• MPEG1
• MPEG2
• MPEG4
• XVID
• DIVX3
• DIVX4
• DIVX
• H.264

Audio codec :

• MP3
• AC3
• AAC
• OGG
• WMA (windows media audio)  : It is voice compress format that one of the microsoft’s windows media technologies 4.0 technique.
• FLAC
• DTS

compression software

• Alzip
• Bandizip
• FilZip
• 7-Zip
• WinRAR
• WinZip

– Reference :

http://searchstorage.techtarget.com/

http://en.wikipedia.org/