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- #HTML5 AUDIO CODEC HOW TO#
- #HTML5 AUDIO CODEC MOVIE#
- #HTML5 AUDIO CODEC MP4#
- #HTML5 AUDIO CODEC SOFTWARE#
This means that when producing B-frames, the encoder can look both forwards and backwards for redundant picture information. P-frames are more efficient than I-frames, but less efficient than B-frames.ī-frames: B-frames are bi-directional predicted frames. When producing a P-frame, the encoder can look backwards to previous I or P-frames for redundant picture information.
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The encoder does not need to store the unchanging background pixels in the P‑frame, thus saving space. For example, in a scene where a car moves across a stationary background, only the car's movements need to be encoded. P-frames holds only the changes in the image from the previous frame. These are the largest frames of the three, and the highest-quality, but the least efficient from a compression perspective while P‑frames and B‑frames hold only part of the image information, so they need less space to store than an I‑frame, and thus improve video compression rates. I-frames: Intra-Frame, also known as key frames, I-frames are completely self-referential and don't use information from any other frames like a conventional static image file. H.264 streams include three types of frames:
#HTML5 AUDIO CODEC MP4#
#HTML5 AUDIO CODEC SOFTWARE#
#HTML5 AUDIO CODEC MOVIE#
Generally being able to compress entire movie down to about 700Mbytes.
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Good for compressing movies and for computer playback due to their good size/quality ratio.Xvid is the Divx spelled backwards version, and it is freeware competitor.Starting from 2001, MOV and MP4 began using the same format specifications.Owned by Apple's Quick Time department.Doesn't allow for metadata, chapters, and subtitles.It can also be easily streamed over the internet.It can store most of any types of video data including H.264, metadata, chapters, DVD menus, and subtitles.Most container formats are specialized for specific data requirements. By definition, a container format could wrap any kind of data.
#HTML5 AUDIO CODEC HOW TO#
Just like a ZIP file can contain any sort of file within it, video container formats only define how to store things within them, not what kinds of data are stored. Each of these three streams may be handled by different programs, processes, or hardware but for the multimedia data streams to be useful in stored or transmitted form, they must be encapsulated together in a container format. Many multimedia data streams contain both audio and video, and often some metadata that permit synchronization of audio and video.