MP4 is a new container format, it is the global file extension for the official container format defined in the MPEG-4 standard. A container format allows you to combine different multimedia streams into one single file. Multimedia containers are for example the well known AVI, MPEG , Matroska, OGM. MP4 is streamable and supports all kinds of multimedia content, multiple audio-, video-, subtitlestreams, pictures, variable-framerates, -bitrates, -samplerates…) and advanced content like 2D and 3D animated graphics, user interactivity, DVD-like menus.
What is Hardware Overlay? Hardware overlay, also known as video overlay, is a method of rendering an image to a display screen with a dedicated memory buffer inside computer video hardware, to display a fast-moving video image such as a computer game, a DVD, or the signal from a TV card. Hardware overlay is supported by most video cards and media players. (more…)
Based on the diversity of video format and different need, some times we want to convert video to our mp4, or mobile phone, some times we want to up load some video we have recorded with our DV and upload it to YouTube or other networks, so, we need to do a lot of video conversion, so we need a video converter, and most users who need a video converter, they also need a audio converter, and an image converter, so the question came:”Is there a video converter which can also convert audio and image files, or extract audio track fro video?” (more…)
How to backup a DVD to one or two DVD±R disc(s)? There are several options to choose from, ranging from keeping only the main movie and one audio track, to splitting complete DVDs onto 2 DVD±Rs and to squeezing every feature on a particular DVD on a DVD±R. Some guide list many different software for different requirement, such as Full DVD backups, Main movie only, Stripping unwanted extras; DVD-5 -> DVD±R, DVD-9 -> 2 DVD±R, DVD-9 -> 1 DVD±R; basic multiangles, advanced multiangles, Button over video, Infinifilm, Mimicking seamless branching, and so on. But I come up with a question, is there a software which can satisfy all of those needs? (more…)
525/60 refers to a NTSC analog TV signal. Although NTSC only has 486 horizontal lines in its Active Area, a NTSC video signal also includes extra vertical sync lines, which are basically just filler timed to allow the electron guns in a CRT television time to reposition themselves at the top of the screen. There are 39 vertical sync lines, resulting in a total of 525 lines (486 + 39). (more…)
Motion compensation and prediction are performed at the macro-block layer. The goal of motion compensation is to provide a good prediction for the macro-block. Actually, in the macro-blocks where prediction is applied, the DCT is performed to the prediction errors instead of to the image samples and more the prediction errors are low and more the entropy coding is effective. Therefore, with good predictions it’s possible to have low bit rate and good quality. (more…)
Matroska file formats is a new video and audio container format, it is similiar to AVI but with several new features like support for OGG audio, Variable Framerate Video, etc.
.mkv : Generally video files, as well those containing audio or video only
.mks : a so called ‘elementary’ matroska stream containing any subtitles stream
.mka : audio only files, can contain any supported audio compresion format, such as MP2, MP3, Vorbis, AAC, AC3, DTS, PCM and soon MPC ( musepack )
DVR-MS is abbreviation for Microsoft Digital Video Recording developed by Microsoft, it is a proprietary video and audio file container format, it can be used for storing TV content recorded by Windows XP Media Center Edition, Windows Vista and Windows 7. Multiple data streams (audio and video) are wrapped in an ASF container with the extension DVR-MS. Video is encoded using the MPEG-2 standard and audio using MPEG-1 Layer II or Dolby Digital AC-3 (ATSC A/52). (more…)
Dolby Pro-Logic is an encoding technology developed by Dolby Laboratories, Pro-Logic and Pro-Logic II are methods of encoding 4 channels for Pro-Logic (left, right, center, surround) and 5 channels for Pro-Logic II (left, right, center, left surround, right surround), into a stereo (left, right) channel format to be decoded into 4 or 5 channels with a proper decoder. (more…)
These days, video editing techniques have become so advanced that there is virtually no limit to what you can do with a home movie you have created to add dramatic effect to a particular scene. The interesting thing is that we hardly notice these effects when we’re watching a film but they do make the difference between an interesting and a boring home movie and can bring a special dimension to a particular scene. Ultimately, it’s the creativity and skill of both the filming and editing which will be the determining factor in whether a specific effect ‘works’ or not in the context of the scene. That only comes with practice and trial and error. Here are some useful editing effects you might wish to try out. (more…)