Format Reference
XviD
XviD is the name of a popular new video codec being developed as an open source project by volunteer programmers from all over the world. The format was created to offer a free alternative to other commercial video codecs, and despite being open source its quality and efficiency has made it one of the most popular video codecs online. While XviD still isn't as widely used as DivX, playback of XviD movies is usually supported in new DVD players nowadays.The XviD codec makes it possible to compress a full-length DVD-quality movie enough to fit on a single CD (might require 2 CDs depending on the length of the movie), while still maintaining the original image quality. Despite the fact that XviD movies offer higher quality video at smaller file sizes they take less time to encode than MPEG-2 due to the incredible compression technology. The video is usually combined with MP3 or AC3 audio to enable both high quality video and audio. These factors and the fact that the codec is distributed for free has contributed to the success of the format.
H.264
H.264, also known as MPEG-4 AVC (Advanced Video Coding), is a video compression standard that offers significantly greater compression than its predecessors. The standard is expected to offer up to twice the compression of the current MPEG-4 ASP (Advanced Simple Profile), in addition to improvements in perceptual quality. The H.264 standard can provide DVD-quality video at under 1 Mbps, and is considered promising for full-motion video over wireless, satellite, and ADSL Internet connections.
| xViD and H.264 |
XviD
Encoding options
Codec: xvid
Pass: 2-pass
Quality(D-Vision): Best
Bitrate: 839 kbit/sec
Resolution: 740x400
FPS: 29.97
Runtime: 4:00 min
Audio encoding options: Mp3 128 kbit/sec
Time to encode: 6 min
|
H.264
Encoding options
Codec: x264
Pass: 2-pass
Quality(D-Vision): Best
Bitrate: 839 kbit/sec
Resolution: 740x400
FPS: 29.97
Runtime: 4:00 min
Audio encoding options: Mp3 128 kbit/sec
Time to encode: 27 min |
According to above data, we can see that :the same source video ,xVid need less time to convert ,but H.264 has better quality.
AAC Format (aac)
A new MPEG sound format.
ASF Format (WMV)
ASF stands for Advanced Streaming Format because it is designed to be viewed while it downloads (streams) from the Internet. This is one of the formats used by Windows Media Player. It is a file format that has audio and video streams and is specially designed to run over networks like the Internet. It is a format that contains streaming audio, video, slide shows, and synchronized events. The video and audio streams can be compressed using various compressors (MCMP, JPEG, MCMW, MJ2K, H263, H264, MPEG-2, MPEG-1, MPEG-4, Vorbis, MP3, AC3, AAC, and many others). Each compressed file needs a decompressor to be played or converted. This means that just because two files have the same extension they may not be similar. You might be able to play one ASF file because you have its decompressors but you might not be able to play another because you do not have its decompressors.
AVC Format (AVC)
AVC stands for Advanced Video Coding using the (ISO/IEC 14496-10/AVC) standard, a codec for video signals.
AVI Format (AVI)
AVI (Audio Video Interleave) is a file format defined by Microsoft. It is the most common format for audio/video data on PCs. AVI files can have one or more video streams and one or more audio streams. The video and audio streams can be compressed using various compressors (MCMP, JPEG, MCMW, MJ2K, H263, H264, MPEG-2, MPEG-1, MPEG-4, Vorbis, MP3, AC3, AAC, and many others). Each compressed file needs a decompressor to be played or converted. This means that just because two files have the same extension they may not be similar. You might be able to play one AVI file because you have its decompressions but you might not be able to play another because you do not have its decompressions. Or you might have the audio decompressor but not the video decompressor-- in such a case; you would hear the audio, but not the video. You need to have both the audio and video decompressors to play back both streams.
DICOM Format (DIC)
The DICOM file format is used in the medical and healthcare industry for patient records and is a high resolution grayscale image format. For more information, refer to the DICOM Standard, published by the National Electrical Manufacturers Association, 1300 N. 17th Street, Rosslyn, Virginia 22209 USA
DivX Format (AVI)
DivX is a codec used to compress many AVI and ASF files you find over the Internet. You will need a DivX decoder to convert those files.
LEAD H264
LEAD H264 is a DirectShow filter for compressing and decompressing Video data using the H.264/AVC standard. H.264 is the latest video standard developed jointly by ITU and MPEG. H.264/AVC provides a far more efficient algorithm for compressing video. It typically outperforms all existing standards by a factor of three to four especially in comparison to MPEG-2.
LEAD MPEG-4
LEAD MPEG-4 is a DirectShow filter for compressing/decompressing video data using the MPEG-4 (ISO/IEC 14496-2) standard. MPEG-4 is suitable for a wide range of bandwidths from low bandwidth to broadband.
MP1 Format (MP1)
MPEG-1 audio, layer 1.
MP2 Format (MP2)
MPEG audio, layer 2.
MP3 Format (MP3)
The MP3 file format is the most popular format for music files and uses lossy compression, resulting in small file sizes.
MP4 Format (MP4)
These files have the extension ".mp4". Can contain H264 or MPEG-4 compressed video stream with AAC audio. This format supports both audio and video files. MPEG-4 is suitable for a wide range of bandwidths from low bandwidth to broadband.
MPEG Format (MPG)
MPEG (Moving Picture Experts Group) formats have the extension .mpg or .mpeg. MPEG files can have one or more video streams and one or more audio streams. The video streams are compressed using MPEG-2 compression scheme. The audio streams are compressed using the MPEG audio or AC3 compression scheme. Each compressed file needs a decompressor to be played or converted. This means that just because two files have the same extension they may not be similar. If you have an MPEG-2 video decoder you will be able to decode most MPEG-2 videos but since MPEG files can contains two types of audio, you may not be able to play all MPEG files unless you have both AC3 and MPEG audio decoders.
OGG Format (OGG)
OGG is the name of Xiph.org's container format for audio, video, and metadata. Its default audio compressor is called Vorbis. Vorbis compression offers better quality than MP3 and yields a higher compression ratio. Ogg Vorbis is different from other formats because it is completely free, open, and unpatented. OGG files can have one or more video streams and one or more audio streams. The video and audio streams can be compressed using various compressors (MCMP, JPEG, MCMW, MJ2K, H263, H264, MPEG-2, MPEG-1, MPEG-4, Vorbis, MP3, AC3, AAC and many others). Each compressed file will need a decompressor to be played or converted. This means that just because two files have the same extension they may not be similar. You might be able to play one OGG file because you have its decompressors but you might not be able to play another because you do not have its decompressors. Or you might have the audio decompressor but not the video decompressor-- in such a case, you would hear the audio, but not the video. You need to have both the audio and video decompressors to play back both streams.
QuickTime version 2.0 or earlier
QuickTime is a file format for storing and playing back movies with sound. In Windows, QuickTime files usually appear with the .MOV filename extension.
WAV Format (WAV)
The WAVE file format is used to store digital audio data in raw form and is a standard CD quality audio format that requires a large amount of memory (10 MB for 1 minute)
Windows Media Audio (WMA)
This is an audio format used on the internet. It was developed by Microsoft and is used in applications like portable digital audio players, where memory is a constraint. It is an Advanced Systems Format (.asf) file that is compressed with the Windows Media Audio (WMA) codec.
Windows Media Video (WMV)
WMV (Windows Media Video), also known as ASF files, is a file format developed by Microsoft. WMV files have audio and video streams. The video and audio streams can be compressed using various compressors (MCMP, JPEG, MCMW, MJ2K, H263, H264, MPEG-2, MPEG-1, MPEG-4, Vorbis, MP3, AC3, AAC, and many others). If you cannot play the file then you do not have the codec to decompress the file. If you cannot play the file, then the file cannot be converted.
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