Also called MPEG-4 AAC, this audio codec is the continuation of the MP3
codec created by Fraunhofer-Gesellschaft. Due to advances in the technology,
AAC files encoded at a 96 kbps bit rate sound slightly better than MP3s
encoded at 128 kbps.
Advanced Streaming Format (formerly Active Streaming Format). A Microsoft
file and data stream format for multimedia data including audio, video,
still images, and other data types. Also referred to as Windows Media format..
AVI stands for Audio Video Interleave. This is a container video format
that specifies certain structure how the audio and video streams should
be stored within the file. AVI itself doesn't specify how it should be encoded
(just like the streaming format ASF), so the audio/video can be stored in
very various ways. Most commonly used video codecs that use AVI structure
are M-JPEG and DivX. AVI contains code called FourCC which tells what codec
it is encoded with.
Bit rate very often used when speaking of video or audio quality and file
size -- defines how much physical space one second of audio or video takes
in bits (note: not in bytes). The higher the bit rate, the more times per
second the original sound is sampled, thus yielding a more faithful reproduction
and better sound. When choosing an MP3, weigh the advantage of a higher
bit rate against the size of the file. Generally speaking, a bit rate of
128 kbps or higher will provide satisfactory sound quality. Constant Bit
Rate (CBR) encoding maintains the same bit rate throughout an encoded file.
Variable Bit Rate (VBR) is an MP3 encoding method that's used when file
size is not an issue. Unfortunately Video Convert Master decodes VBR but
doesn't encode it. Selecting the proper bit rate for your projects depends
on the playback target: if you're making a VCD for playback on a DVD player,
the video must be exactly 1150 Kbps and the audio 224 Kbps.
MPEG stands for 'Moving Pictures Experts Groups'. It is a group working
under the directives of the International Standards Organization (ISO) and
the International Electro-Technical Commission (IEC). MPEG is a committee
of experts from the audio, video and computer industries developing an evolving
series of standards for compression of moving images.
MPEG-1 defines a framework for encoding moving video and audio, significantly
reducing the amount of storage with minimal perceived difference (difference
that humans can detect) in quality. MPEG-1 video compression method tries
to use previous frame's information in order to reduce the amount of information
the current frame requires. In addition, the audio encoding uses something
called psychoacoustics - compression removes the high and low frequencies
a normal human ear cannot hear.
MPEG-2 is not a successor to MPEG-1, but an addition instead - both of these
formats have their own purposes. MPEG-1 is a relatively low-resolution format
currently used in VCD and the World Wide Web for short animated files. The
MPEG-2 is a much higher resolution format developed for digital television
and used in DVD.
MPEG-4 unlike MPEG-1 and MPEG-2, MPEG-4 itself isn't just one unified encoding
mechanism, but rather a group name for several flavors of video and audio
encoding methods that share certain same characteristics. These "flavors"
are often referred either as "profiles" or "layers" in MPEG-4 compression
scheme and each new profile should be backwards compliant to the older,
"lower" versions of MPEG-4 in terms of playback capability.
3GP is the name for both a video standard designed for mobile phones and
the name of the container used to store video used in the standard. And
it is usually 176x144 or 176x120.
3GPP was called for 3rd Generation Partnership Project. The purpose of the
project was developing a mobile video standard compatible with 3G (3rd Generation)
GSM mobile phone systems.
Graphic Interchange Format. An efficient method of compressing image files
without loss of data or distorting the image. (GIF compression is therefore
lossless.) The algorithm only works for files with 256 or less colours and
is best at compressing images with large areas of homogeneous colour. It
is not so efficient for images with many colours and complex structures.
WMA is acronym for Windows Media Audio. WMA files contain perceptually encoded
sound data. The frequencies that humans cannot perceive are removed, although
some audio purists say they can tell the difference between a high bit-rate
WMA and a Wave file.A WMA file can be as much as 20 times smaller than an
equivalent WAV file.
Compact Disc-Read Only Memory: a standard for compact disc to be used as
a digital memory medium for personal computers. The 4.75in laser-encoded
optical memory storage medium can hold about 650MB of data, sound, and limited
stills and motion video. A CD-ROM player will typically play CD-DA discs,
but a CD-DA player will not play CD-ROMs
VCD stands for Video CD. Most of the stand-alone DVD players and VCD players
can play VCD. VCD is still the most compatible format for video distribution.
Anybody with a DVD player, VCD player or computers with CD-ROM drive (standard
configuration) is able to play VCD. The video quality is better than most
other formats and is sufficient for average home viewing. A VCD recording
medium is very cheap and most widely available. Due to small sizes, VCD
videos are also well suited for distribution.
DVD stands for Digital Video Disc. A standard VCD records video data in
MPEG-1 format. On the other hand, a standard DVD records video data in MPEG-2
format. A DVD player or a computer equipped with a DVD drive is required
to play DVDs. Almost all DVD players also play VCDs.
A DVD is a very high-density optical storage medium. It is able to hold
significantly more data as compared to VCDs. A typical 2½-hour movie requires
two VCDs. The same movie requires only one DVD. Moreover, the recorded movie
itself has twice as better quality and resolution as compared to VCDs. This
is because a DVD movie records video data in the MPEG-2 format.
DVDs are fast gaining popularity with its high-quality videos and high-storage
capability. However, DVD recording medium, DVD players and DVD drives are
still relatively expensive.
SVCD stands for Super Video CD. SVCD is a successor to Video CD. SVCD contains
MPEG-2 video stream and MPEG-1 or MPEG-2 audio stream recorded on a normal
VCD recording medium. Most of the DVD players can play SVCD discs.
An SVCD video quality is much better than VCDs and virtually the same as
DVDs. Since SVCD is still restricted to 650Megs of data, the amount of discs
required for a standard 2½-hour movie is more than double as compared to
is supplied as a stand-alone application for decompiling flash movies. It
enables you to convert SWF to FLA format which can easily be edited in native
Flash environment and convert between swf and exe format. All components
(images, sound, action scripts, texts, morphs shapes, frames, morphs, fonts,
texts, buttons and sprites) can be completely recovered
There are two common types of files that carry the fla extension. Firstly
you might have a Flash Authoring file. This can be opened with Flash software
for editing. Another type of file you might have when you get a fla file,
is a FLAC music file. FLAC stands for Free Lossless Audio Codec. It is open
source and provides lossless audio compression. This means that even though
the audio is compressed, it will still maintain its exact original quality.
However, since it is lossless, music stored in this format would definitely
take up more space than say MP3 or Musepack audio or any other lossy compression.
Video is made up of an electro-magnetic signal that that can travel through
electronic devices like cables, antennas, satellite dishes and TVs. Sent
from its source, video has a certain amount of information in it that makes
up the video picture. However, when that signal travels through a sending
device it can also pick up additional information from other electro-magnetic
sources. This is what is called interference or static (for those of you
who use bunny-ear antennas on your TV, you know what I mean). What makes
the difference between Analog and DV video is the way the video signal is
interpreted on the sending and receiving ends of all that electro-magnetic
A software development kit (SDK or "devkit") is typically a set of development
tools that allows a software engineer to create applications for a certain
software package, software framework, hardware platform, computer system,
video game console, operating system, or similar platform. It may be something
as simple as an application programming interface in the form of some files
to interface to a particular programming language or include sophisticated
hardware to communicate with a certain embedded system. Common tools include
debugging aids and other utilities often presented in an IDE. SDKs also
frequently include sample code and supporting technical notes or other supporting
documentation to help clarify points from the primary reference material.
Digital Video Formats
Digital video formats are always a trade-off between size and quality. Maximum
quality is only achieved by sampling at a high rate and not compressing
the data. Doing this with broadcast-quality video requires about 20 MB/sec
of digital data (or 1.2 GB/min). For most purposes this is an impractical
amount of data, so various compression schemes are used to reduce the amount
of data without noticeably reducing quality.
Many of us have heard of DVDs before -- but what are mini DVD, VCD, or SVCD?
The reason that you may want to consider these other formats is because
the costs of DVD burning and the space required over PC.
These alternative formats provide a good economical solution for distributing
your movies on CD-R/RW discs that can be played on computers and many home
stand-alone DVD players. Video Convert Master provides a solution to cut
down the stored space, and a method of burning 2 or more different videos
into one disc.
For a complete guide on the advantages, required settings and playback options
of each format, please refer to the following questions.
The PAL Picture Standard
MPEG video is a standard for broadcasting and viewing on Digital TV. These
standards, called as the picture standards, differ from country to country.
PAL (Phase Alternating Line) is a TV standard introduced in the early 1960’s
in Europe. PAL is used in most of the western European countries (except
France, where SECAM is used instead), Australia, some countries of Africa,
some countries of South America and in some Asian countries.
The NTSC Picture Standard
NTSC (National Television System Committee) is a Color TV standard developed
in the U.S. in 1953. United States, Canada, Japan, most of the American
continent countries and various Asian countries follow NTSC standards. Rest
of the world uses either some variety of PAL or SECAM standards.