1. Blu-ray and HD DVD
Blu-ray that we are familiar with "blue-ray" disc, referred to as BD. In fact, from a technical point of view, BD and HD DVD have a 405nm wavelength of blue laser to read and write, is not it should be called "blue-ray" mean? Oh, as to why one called HD DVD and anohter called Blu-ray, left to go to Google.
2. Approach: HD Remux, HDRe, HDRip (BD similar)
2.1 HD Remux, referred to as Remux, usually refers to BD or HD DVD discs in video and audio content to non-destructive way to extract and package to a specific format (usually TS) files inside the treatment. It has not been any way of re-encoding, video and audio about "authentic." However, the film will not have the original disk Remux playback menu and footage, but the film has a large capacity in the current network environment require a longer download time.
2.2 HDre to the capacity, to obtain a better picture and sound quality on balance, will be re-encoded HD video streaming approach. It does not re-encode the audio stream, so they can maintain a good quality performance. HDre processing of the film at least, above the level of resolution to 720p, and therefore belong to the ranks of high-definition video.
2.3 HDRip video and audio streams are carried out re-encoding, the volume further reduced, the performance of less quality in 720p, better than DVDRip, but the volume is also close to the latter. A complete HDRip movies generally take up 2GB to 4GB storage space, ease of communication between audio and video enthusiasts. Of course, the picture quality than 720p to almost, HDRip are often classified as "SD" in the ranks.
3. Common resolutions: 720p, 1080i, 1080p, a1080, a720, 816p
The first three are used to identify key indicators of high-definition video resolution. Among them, the figures follow the i and p are the Interlace scan (interlaced) and Progressive scan (progressive scan) of the abbreviation, and the figures reflect the high-definition video vertical resolution. Refers to as 720p 1280 * 720 progressive scan, 1080i is 1920 * 1080 interlaced scanning, which is a horizontal resolution of the signal source in accordance with conventional methods abbreviated naming convention. To more than 720p resolution, high-definition source barriers to entry, 720p standard also known as the HD standard, and 1080i/1080p known as Full HD (Full HD) standard.
Part of the film's resolution of a720 and a1080, is the use of morphing technology to achieve higher picture quality. a1080 generally include 1080 and 1280 * 1440 * 1080 in two sizes, the vertical resolution of 1080p standards are met, the horizontal expansion through play, to achieve close to the clarity of Full HD. a720 generally use 960 * 720 size, but also lower to 852 * 720. The 816p resolution is not a standard, it is time to do re-encoding, in order to effectively use, reduced capacity, the use of AVS software will cut down the black side. 1920 * 1080 resolution, such as the ratio of 1.78:1, the film, the actual content was 2.35:1 wide screen, remove the black edges was in 1980 * 816. Deformation techniques can also be used to reduce the horizontal pixels to 1440, and finally became a 1440 * 816.
4. Video encoding: H.264, VC-1, MPEG-2, X264
Currently, the BD and HD DVD is widely used on high-definition video encoding formats are H.264, VC-1 and MPEG-2 three, from the compression ratio and performance requirements for the hardware to sort it, H.264> VC -1> MPEG-2, while the image quality is not absolute, in general, VC-1 is quite good. H.264 is the ITU-T (International Telecommunication Union) and ISO / IEC MPEG joint development, often referred to as AVC. Now there is a format called the X264 is actually a variant of H.264, which provides a free, open source encoder, common in HDre and HDRip format. Simply put, H.264 is a standard, and X264 is a specific implementation of this standard product. VC-1 is a dominated by Microsoft encoding format, the hardware performance on demand and video size to achieve a better balance, and MPEG-2 as a more mature technology base in the field of early high-definition wide range of applications.
5. Track format: DD5.1, DD Plus, Dolby TrueHD, DTS, DTS HD, LPCM
5.1 DD5.1: the traditional Dolby DIGItal 5.1 (Dolby Digital 5.1, AC-3), it can provide three-dimensional first-line entry-level multi-channel experience. DD5.1 ??is very high compression ratio, coding rate is low (only up to 640Kbps), in high-definition audio enthusiast applications inevitably stretched. Small footprint, ease of network transmission is the DD5.1 ??track two major advantages.
5.2 DTS: DTS is "Digital Theatre SySTem" abbreviation, are lossy compression techniques. Compared with DD5.1??, DTS encoding rate of 1.5Mbps or more, to achieve better audio playback.
5.3 DD Plus: Dolby Digital Plus, you can also write "DD +", which is common in high-definition audio technology applications, it has a 7.1 or above, the number of channels, a wider range of code rates up to 6Mbps. DD Plus can do both sound quality and volume, high-definition has been widely recognized by the industry for high-definition broadcast-level applications.
5.4 Dolby TrueHD: It uses a 100% lossless compression encoding, the encoding rate up to 18Mbps full-band and eight-channel 24bit/96kHz. As the coding rate is higher, Dolby TrueHD audio track storage space, bandwidth requirements for transmission is quite amazing, difficult to apply to broadcast systems are.
5.5 DTS-HD: DTS-HD 7.1-channel technology as a starting point, can support up to 32 channels of surround sound playback, the sampling rate from 8kHz to 192kHz, coding rate of up to 1.5Mbps. Dolby TrueHD DTS HD is the most powerful competitors in the HD video market has good prospects.
5.6 LPCM: LPCM is linear pulse code modulation (Linear Pulse Code ModulatiON) acronym, is a continuous linear sampling method to the analog signal into a digital signal of audio technology. LPCM audio without any compression, which ensure good sound quality, it also brings a large amount of data.
Package format: TS AVI MKV WMV
We usually more than four terms will be interpreted as high-definition video file extensions, but more precisely, this should be the four most common high-definition video package format. In theory, packaging formats and video coding formats and audio formats do not exist necessarily linked. Now, TS format has become the most widely used package online format, "Remux" new sources often see its shadow. Moreover, some of the more high-end audio technology, such as DTS-HD, TS format can only be packaged together. For AVI, is the most familiar form of a package, but are lagging behind the specifications, compatibility with the emerging video coding is poor. MKV and WMV source of the film is relatively abundant, but in general are not as good as TS format, and, PowerDVD does not support the MKV container format.
2011年10月31日星期一
2011年10月29日星期六
Is your Favorite Disney Princess Disney real?
We’ve always loved the Disney princesses in a fairy tale sense, so we’ve never imagined they were real. But one graphic design student, Jirka Väätäinen, at the Arts University College at Bournemouth in the UK
The animation clips, filtering, rotation, stretching and other treatment, the need for an easy operation and powerful tool, UM Video Process Filter is such a software. That allows rotate video in 90, 180, and 270 degrees, keep aspect ratio when rotated video in 90 and 270 degrees , flip the video, move horizontal and vertical, scale video. It can be used during capture for real-time processing, during conversion or during playback to enhance existing media files.
Yourself, like Jirka Väätäinen, as your favorite Disney princesses will be made into live image or real animation is no longer a dream. What do you like these Disney princesses?
High quality + full manual top consumer digital cameras recommend
Flagship consumer digital camera with excellent picture quality performance and good handling. Large sensor and high-quality large aperture lens is imaging a strong guarantee. The full manual shooting mode, so users have more room to maneuver. Here are three consumer flagship model, their powerful, most taken to meet the daily requirements are more than enough. Optical image stabilization, wide angle, external flash, rich manual functions, are the flagship models of these attractions.
Canon's flagship G12 consumer reference price: $414.95 - $509.00
Canon G12 is not only carrying about 10 million effective pixels for high sensitivity CCD image sensor and DIGIC 4 image processor, noise reduction technology has improved the algorithm so that the image resolution under high-sensitivity shooting further.
Canon G12 equipped with a 2.8 inches around 461,000 points of "crystal-hyun II" rotating LCD display, 5x optical zoom, 28-140mm equivalent focal length of lens, can shoot 720p video clips, the maximum wide-angle end aperture up to F2.8. The machine also features Canon's latest HS HS SYSTEM, can be a perfect noise reduction, high ISO image quality is also able to obtain pure photo. In addition, G12 is also equipped with an electronic turntable to achieve SLR camera close to the high maneuverability, and integrated into the electronic level, to confirm the horizontal position when shooting.
Other areas, using a Canon G12 Dual IS image stabilizer, which can shift on the angle jitter and jitter compensation. It also has auto-tracking AF, dynamic range HDR mode and Intelligent Scene mode, and Intelligent Scene mode also adds a strong new spotlight facial shadows and 6 kinds of scenes, so that can automatically identify the scene of 28 species. In addition, the shooting mode to increase the "miniature landscape effects" and "fish-eye effect" and other styles.
Nikon's flagship P7100 consumer reference price: $479.00 - $499.99
Nikon P7100 using 10.1 million effective pixels, 1/1.7 inch CCD sensor, 7.1x optical zoom 28-200mm equivalent focal length of the optical image stabilization lens, and the new EXPEED C2 image processing system, equipped with 3.0-inch, 920,000 pixel rotating LCD display, the camera can shoot 720p video clips, sensitivity range of ISO100-3200, and expanded to ISO 6400.
In addition, P7100's images more quickly, more powerful noise reduction, clearer photos taken, sharp. It has high-speed response and a shorter boot time, focus and shoot for the time lag. In addition, P7100 model supports a variety of special effects modes options, including zoom, exposure, exposure during the defocusing and a new positive impulse and other negative patterns.
In addition to approximately 0.16 seconds, faster autofocus and some shooting time lag of 0.22 seconds outside the camera's overall responsiveness has improved, including the photo shoot and display the time interval between photos, enabling users to take more photos. Built-in stereo HD video recording function can be 1280 × 720 pixels and saved an impressive stereo video. Camera also has HDMI mini connector for video playback on an HDTV. Support the AE / AF lock, may provide a variety of shooting settings and used video recording, including exposure compensation and white balance. P7100 can record clear, sharp images with low noise of the video.
Large aperture lens for SLR cameras, which means a more shallow depth of field, but also dream of shooting, of course, the price is also more expensive. DC for the consumer, the large aperture to allow users to get higher under low light conditions, the shutter speed, making the photos are not blurred. Olympus recently released the XZ-1, the lens uses a large aperture of F1.8, and 1/1.63 inch sensor, is currently the largest consumer of the DC.
Olympus XZ-1 with a 10 million effective pixel 1/1.63 inch sensor, equipped with 4x optical zoom, the equivalent focal length 28-112mm f/1.8-2.5 i.Zuiko lens and a 3.0-inch, 614,000 pixel VGA OLED LCD screen. While using a Truepic V image processing engine, with double anti-shake function, sensitivity range of ISO 100-6400, can shoot 720p HD video and a range of about 320.
Conclusion: The above is the introduction of three consumer flagship model. Their strong performance, to meet the daily requirements are more than enough most of the camera.
If you need to be made into a documentary or short film clip, you can use the software Camera Video Converter tool. Can also be converted to other formats or media file in ipod2 iphone4 play. Camera Video Converter is a very good media format conversion software.
If you need to be made into a documentary or short film clip, you can use the software Camera Video Converter tool. Can also be converted to other formats or media file in ipod2 iphone4 play. Camera Video Converter is a very good media format conversion software.
2011年10月28日星期五
What are the major video formats?
1. MPEG format
This type of format is a large family, which we usually have seen the most common video format. Multi-format derived from it, including mpg, mpe, mpa, m15, m1v, mp2, etc. MPEG format, including MPEG video, MPEG audio and MPEG systems (video, audio synchronization), MP3 (MPEG-3) audio files is a typical application of MPEG audio; video include MPEG-1, MPEG-2 and MPEG4.
MPEG-1 is widely used in the VCD production and some video clips to be downloaded, the largest of which is the VCD - VCD is almost all used Mpge-1 compression format (*. dat files). MPEG-1 compression algorithm can be a 120-minute film (the original video files) compressed to about 1.2GB size.
MPEG-2 is applied in the production of DVD (*. vob files), but also in some of the HDTV high definition television) and some demanding video editing, processing has considerable application. Using MPEG-2 compression algorithm produced a 120-minute film (the original video files) about the size of 4GB to 8GB, of course, image quality indicator is the MPEG-1 can not match.
MPEG-4 is a new compression algorithm, using this algorithm ASF format files (next to be introduced) can make a 120 minute film (the original video file) "downsizing" to 300MB or so, because of its small easy to spread, it becomes one of the main online video. This algorithm is said to be banned the export of coding technology by the United States, In addition, the use of the DivX format can compress the source files to 600MB or so, but its image quality is much higher than the ASF. Because of its efficiency, there are rumors that the U.S. government banned the export of this technology.
Here also the way explain the DivX format, the most brilliant general in the DivX format, a word is: DVD killer. DivX video encoding technology can be produced for the DVD, and it is bound to break all the ASF and developed. As mentioned above, as it uses MPEG-4 algorithm, this has been compressed a DVD requires only 2 VCD! This not only means that you do not need to buy a DVD-ROM and it can get similar video quality and playback of this code, the requirements of the machine is not high: CPU as long as more than 300MHZ, 64MB of RAM and 4MB of video memory (I believe the vast majority of machines are now eligible), you can smooth playback.
In addition, it is worth mentioning that, when the MPEG-1 and MPEG-2 were made into VCD and DVD, due for in different formats, each of which has its special resolution of the standard, VCD NTSC format to use, it's MPEG -1 compressed image resolution of 352 × 240, which uses the PAL format, is 352 × 288, DVD using NTSC format, MPEG-2 compressed image resolution of 720 × 480, using the PAL format, it is 720 × 576. If you intend to make the DVD / VCD playback on CD-ROM, then the image file in the production of a variety of recorders require special attention when using the standard.
2. AVI format
AVI is not so complex compared to MPEG, from WIN3.1 era, it has been published. The most immediate advantage is that it is compatible with good image quality, convenient and good call, so often compared with the DVD and said. But its drawback is also very clear: bulky. Also because of this, we see that the MPEG-1 and MPEG-4 was born. 2 hours AVI video file size with no difference between MPEG-2 count, but this is only for the purposes of the standard resolution: according to different application requirements, AVI's resolution can be arbitrarily adjusted. Resolution larger, the greater the amount of data files. Lower resolution can substantially reduce its size, but image quality will inevitably suffer. MPEG-2 format with the file size is almost the case, AVI format video quality is poor relative to many, but making it less demanding on the computer's configuration, has often been a good first recorded video in AVI format, then converted to other formats.
3. RM format
It is Real's multimedia world, a major contribution to the online video promotion. Its birth, also makes the stream file for more people to know. Such files can achieve real-time playback, that start with the server to download some video files, streaming video form after the real-time playback buffer, while continuing to download, ready for the next play. This "side edge of playback transmission" approach to avoid the user must wait for the entire file downloaded from the Internet to view, and thus particularly suitable for viewing online video. RM is mainly used in low rate of online real-time transmission of video compression format, it also has a small size, but fairly clear characteristics. RM file size depends entirely on making the selection of compression rate, which is why sometimes we see the one-hour video only 200MB, sometimes 500MB.
4. ASF and WMV format
The *. asf and *. wmv video file for RM came into being, but also is WindowsMedia core. Their common feature is the use of MPEG-4 compression algorithm, so the compression ratio and image quality is very good (almost point than the VCD only, better than the RM format). Like with most video formats, the picture quality with file size is inversely proportional relationship. That is, the better quality, larger files; the contrary, the smaller the file, the worse the quality. In the production of ASF file, recommended 320 × 240 resolution and 30 frames / second frame rate, you can take into account the clarity and file size, then the image is about 2 hours about 1GB.
5. MOV format
Among all the video formats, MOV format is perhaps the most unknown. You might have heard of QuickTime, MOV file format to play it by its. Almost in the PC world domination today, ported from the Apple MOV format naturally marginalized. It has a cross-platform, small storage space requirements of the technical characteristics, and uses a lossy compression method, MOV format, the picture is slightly better than the AVI format. So far, a total of four versions of it, of which 4.0 version of the best compression ratio.
refer : http://www.ultramediasoft.com/multimedia-glossary/multimedia-glossary.html
This type of format is a large family, which we usually have seen the most common video format. Multi-format derived from it, including mpg, mpe, mpa, m15, m1v, mp2, etc. MPEG format, including MPEG video, MPEG audio and MPEG systems (video, audio synchronization), MP3 (MPEG-3) audio files is a typical application of MPEG audio; video include MPEG-1, MPEG-2 and MPEG4.
MPEG-1 is widely used in the VCD production and some video clips to be downloaded, the largest of which is the VCD - VCD is almost all used Mpge-1 compression format (*. dat files). MPEG-1 compression algorithm can be a 120-minute film (the original video files) compressed to about 1.2GB size.
MPEG-2 is applied in the production of DVD (*. vob files), but also in some of the HDTV high definition television) and some demanding video editing, processing has considerable application. Using MPEG-2 compression algorithm produced a 120-minute film (the original video files) about the size of 4GB to 8GB, of course, image quality indicator is the MPEG-1 can not match.
MPEG-4 is a new compression algorithm, using this algorithm ASF format files (next to be introduced) can make a 120 minute film (the original video file) "downsizing" to 300MB or so, because of its small easy to spread, it becomes one of the main online video. This algorithm is said to be banned the export of coding technology by the United States, In addition, the use of the DivX format can compress the source files to 600MB or so, but its image quality is much higher than the ASF. Because of its efficiency, there are rumors that the U.S. government banned the export of this technology.
Here also the way explain the DivX format, the most brilliant general in the DivX format, a word is: DVD killer. DivX video encoding technology can be produced for the DVD, and it is bound to break all the ASF and developed. As mentioned above, as it uses MPEG-4 algorithm, this has been compressed a DVD requires only 2 VCD! This not only means that you do not need to buy a DVD-ROM and it can get similar video quality and playback of this code, the requirements of the machine is not high: CPU as long as more than 300MHZ, 64MB of RAM and 4MB of video memory (I believe the vast majority of machines are now eligible), you can smooth playback.
In addition, it is worth mentioning that, when the MPEG-1 and MPEG-2 were made into VCD and DVD, due for in different formats, each of which has its special resolution of the standard, VCD NTSC format to use, it's MPEG -1 compressed image resolution of 352 × 240, which uses the PAL format, is 352 × 288, DVD using NTSC format, MPEG-2 compressed image resolution of 720 × 480, using the PAL format, it is 720 × 576. If you intend to make the DVD / VCD playback on CD-ROM, then the image file in the production of a variety of recorders require special attention when using the standard.
2. AVI format
AVI is not so complex compared to MPEG, from WIN3.1 era, it has been published. The most immediate advantage is that it is compatible with good image quality, convenient and good call, so often compared with the DVD and said. But its drawback is also very clear: bulky. Also because of this, we see that the MPEG-1 and MPEG-4 was born. 2 hours AVI video file size with no difference between MPEG-2 count, but this is only for the purposes of the standard resolution: according to different application requirements, AVI's resolution can be arbitrarily adjusted. Resolution larger, the greater the amount of data files. Lower resolution can substantially reduce its size, but image quality will inevitably suffer. MPEG-2 format with the file size is almost the case, AVI format video quality is poor relative to many, but making it less demanding on the computer's configuration, has often been a good first recorded video in AVI format, then converted to other formats.
3. RM format
It is Real's multimedia world, a major contribution to the online video promotion. Its birth, also makes the stream file for more people to know. Such files can achieve real-time playback, that start with the server to download some video files, streaming video form after the real-time playback buffer, while continuing to download, ready for the next play. This "side edge of playback transmission" approach to avoid the user must wait for the entire file downloaded from the Internet to view, and thus particularly suitable for viewing online video. RM is mainly used in low rate of online real-time transmission of video compression format, it also has a small size, but fairly clear characteristics. RM file size depends entirely on making the selection of compression rate, which is why sometimes we see the one-hour video only 200MB, sometimes 500MB.
4. ASF and WMV format
The *. asf and *. wmv video file for RM came into being, but also is WindowsMedia core. Their common feature is the use of MPEG-4 compression algorithm, so the compression ratio and image quality is very good (almost point than the VCD only, better than the RM format). Like with most video formats, the picture quality with file size is inversely proportional relationship. That is, the better quality, larger files; the contrary, the smaller the file, the worse the quality. In the production of ASF file, recommended 320 × 240 resolution and 30 frames / second frame rate, you can take into account the clarity and file size, then the image is about 2 hours about 1GB.
5. MOV format
Among all the video formats, MOV format is perhaps the most unknown. You might have heard of QuickTime, MOV file format to play it by its. Almost in the PC world domination today, ported from the Apple MOV format naturally marginalized. It has a cross-platform, small storage space requirements of the technical characteristics, and uses a lossy compression method, MOV format, the picture is slightly better than the AVI format. So far, a total of four versions of it, of which 4.0 version of the best compression ratio.
refer : http://www.ultramediasoft.com/multimedia-glossary/multimedia-glossary.html
What is DVDrip?
DVD we all know that is a very good media formats, MPEG2 video codec; AC3, DTS audio tracks. We also know that the carrier is a DVD disc, D5 have 4.7G capacity. Clearly, transfer DVD file on network directly without practical value, such files will occupy on the server's space and a lot of network bandwidth.
This requires a rip, strip out DVD video, audio, subtitles, after compression or other processing, then re-synthesized into a multimedia file. Get the smaller file size to a DVD audio-visual enjoyment.
To reduce file size, even better quality and sound, need video and audio compression which uses a variety of video and audio codec.
Video coding, Microsoft MPEG4, that is the ancestor of this area, we are familiar with DivX, Xvid are developed on the basis it up. To an MPEG4-based codec there are Windows Media Video 9, DivX, Xvid, etc. In particular, Divx and Xvid, they are open-source developed the most complete and rich. Divx / Xvid-encoded video files, not only it's picture quality is very good, and can be synthesized with a variety of audio file formats, supports multiple tracks, multiple subtitles, there is a lot of plug-ins support.
There is also a very important Real encoder should mention, from the beginning Real RV9 encoder has been a qualitative leap, with and Divx / Xvid against strength. Its performance in low bit rate by a lot of people pro-gaze. However, due to RV9/10 is closed, RV9/10 encoded files only use RV9/10 audio formats, plug-in subtitles is also very troublesome. In particular RV9 audio ineffective for everyone criticized, RV10 finally came to terms with the improvement in audio. But, after all Divx / Xvid is more free and convenient.
The most common audio encoder is MP3; Lame MP3 encoder is the leader in this area, in addition to WMA, AAC, and RA and so on.
The DVD video and audio are encoded synthesis to get a DVDrip new multimedia files. Normal circumstances, use MPEG4 encoder, just need two piece of CDROM disc to store DVD contents. So you can enjoy DVD audio on the minimal cost. It should be mentioned that avi, on the Windows platform was a very old media formats. Now avi has shrunk, as a multimedia container format, avi has become a new format. Avi as a container to allow use Xvid, Divx, VP6 encoded video formats, as well as mp3, AC3 encoded audio formats. Because DVDrip avi now become a hodgepodge of multimedia formats.
In addition DVDrip can also be linked to the same as the DVD subtitles, DVDrip subtitles can be divided into external and built-in subtitles, the built-in video compression is pressed when the subtitles to the video file, so you can not hide and switching subtitles. Plug-in subtitles do not have these drawbacks, subtitles divided into soft and hard subtitles. Soft subtitles is some text file, you can easily modify. Hard subtitles subtitle itself is a collection of pictures, can not modify the content of subtitles. Subtitle plug-ins need subtitles to display subtitles on the player.
Perhaps because RV9/10 encoded RMVB file extension is not avi, and does not support multiple audio tracks, do not have channel switching, and can not easily switch the subtitles. rmvb DVDrip often excluded from the scope. In fact, DVDrip as a DVD backup technology, some broader definition, the DVD video, audio, subtitles stripped out, after compression or other processing, then re-synthesized into a multimedia file, we should be able to call DVDrip.
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