A media container format (or sometimes referred to as wrapper format) is a format that can contain various types of data such as audio and video data. The data is compressed using a codec.
A codec (a compound of coder and decoder) is an algorithm used to compress and/or decompress a multimedia data stream in order to reduce the amount of bytes needed to store or send.
Some container formats are limited to audio, like WAV files for Windows, AIFF for Mac and XMF; some are limited to still images such as FITS and TIFF. There are also containers that are flexible; it can hold several types of audio, video and other media such as ASF files for Windows, MP4 and Matroska. The most common multimedia containers are:
3GP – used by mobile phones
ASF – standard WMA and WMV container
AVI – standard Windows container
Matroska – open standard container
MPEG – standard container for MPEG-1 and MPEG-2
MP4 – standard container for MPEG-4
Ogg – free and open standard container for codecs Vorbis (audio) and Theora (video)
The distinctions between different container formats come up from five (5) main issues:
Popularity. Widely supported container.
Overhead. Example: A two-hour film may be 3MB larger when in AVI than when in Matroska (MKV). The overhead is the difference between AVI and MKV which is 3MB.
Support new codec functionality and features. Some older container formats does not support codec feature such as VBR audio and B-frames.
Subtitles, chapters, meta-tags, and user-data support.
Streaming media support.
Here is a comparison of the different popular container formats today (from Wikipedia).
Support for B-frames; variable bit rate audio; variable frame rate; 3GPP Timed Text subtitle; support MPEG-4 Part 2, H.263, and H.264/MPEG-4 AVC video formats; support AAC, AMR-NB, AMR-WB+, AMR-WB, HE-AAC and HE-AAC version 2 audio formats
Advanced Systems Formats
Support for B-frames, chapters, subtitles, and metadata/tags; variable bit rate audio; variable frame rate; support almost any video format through DMO or VFW; support almost any audio through ACM or DMO
Support for B-frames; variable bit rate audio; variable frame rate; chapters and subtitles are via a third party modification; support almost any video format through VFW; support almost any audio formats through ACM
Matroska (MKV, MKA)
Support for B-frames, chapters, subtitles, and metadata/tags; variable bit rate audio; variable frame rate; support almost any video and audio formats
MPEG Video File (MPG, MPEG)
Support for B-frames; variable bit rate audio; variable frame rate; support MPEG-1, MPEG-2 video formats; support MPEG-1 Layers I, II, III (mp3) audio formats, other formats only in private streams
Support for B-frames, metadata/tags, and menus; variable bit rate audio; variable frame rate; chapters a) in specially formatted text track, and b) in userdata atom can not work together with the sceneDescription, or segmentDescriptor; ttxt and BIFS subtitles, VobSubs subtitle with private objectTypeIndication is not working with the sceneDescription; support Dirac, H.263, MPEG-4 ASP, H.264/MPEG-4 AVC, VC-1, and other video formats; support AC-3, ALS, Apple Lossless, SLS, MPEG-2/4 (HE)-AAC, MPEG-1/2 Layers I, II, III (MP3), Vorbis(with private objectTypeIndication), and other audio format
Support for B-frames, chapters, and Ogg Writ and Ogg Kate subtitles; variable bit rate audio; variable frame rate; support almost any video formats through VFW and supports almost any audio format through ACM
With a growing number of media containers, no wonder audio video converters are popular these days. Some converters can convert almost all different types of audio or video formats while others are limited to popular formats today.
Most cars are fitted with audio system that you can use to listen to music while driving. However, there are those who have gone a step further by fitting video screens also as part of it. A Dodge Ram is a full size pick up car that belongs to the Ram car brand manufacturers. It comes light size and generally made to carry light production. The Audio Video is the latest hi fi technology that you can buy and fix into your car.
This latest technology is made to provide audio as well as visual pictures as part of your music solution. It comes with devices and various components that you can connect to the car and TV screen to allow you to hear and also see the pictures of various performances. The Car audio Video for Dodge Ram comes with wirings that make it easy for you to connect. It also comes with a complete Sound system that includes the loud speakers, screen, amplifiers and all other components that is capable of playing all aspects of musical devices especially DVDs and VCDs.
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Do justice to the media you love while you are on the go: install a top of the line audio video system in your car or boat. Your local car audio electronics shop will be happy to help you select and install the perfect car audio video or marine stereo equipment for you.
With summer getting into full swing across the country, it is not only time for fireworks, backyard barbecues, and pool parties: It is time for road trips and lazy days out on the water. Having a high-quality, properly installed car audio system or marine electronics is an essential piece to truly enjoying your summer and beyond. There is no reason to put up with a static-laden stock radio or no audio system in your vehicle. There are many professional companies that specialize in car stereo, car DVD and marine stereo installation and repair.
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Whether you have kids who are begging for a car DVD system or you tend to drive alone listening to stories on everything from a lava to the world economy on NPR or you never want to be without your favorite tunes playing; you can benefit from working with a local car audio electronics shop to upgrade and customize your vehicle