What video file format is h264?

What video file format is h264?

H.264 is the latest format defined by the MPEG-4 standard. It is also one of the most technologically advanced video coding formats representing the latest technology. Some are also called AVC (Advanced Video Coding). A video compression standard. It is a recording, compression and distribution format for high-precision video that is widely used.

H.264 hardware application - HD-DVD/Blu-ray

DVD Forum and Blu-ray Disc Association are discussing support High Definition content (storage capacity completely exceeds current DVD) Successor to next-generation DVD format: HD-DVD and BD-ROM

HD-DVD is reported to force MPEG-4 AVC/H.264, while Blu-ray support was incorporated into MPEG-4 AVC/H.264 High Profile.

So AVC/H.264 is very likely to be the next generation video format and will be widely used and supported, just like today's MPEG-2 (for DVD)!

With the market demand, obtaining good image quality and low-bandwidth image transmission under the lowest possible storage situation has become two major challenges of video compression. To this end, IEO/IEC/and ITU-T two international standardization organizations have jointly developed a new generation video compression standard H.264.

H.264, like the previous standard, is also a hybrid encoding mode for DPCM plus transform coding. However, it adopts the simple design of “return to basic”, and does not need many options to obtain much better compression performance than MEPG-4; H.264 enhances the adaptability to various channels, adopting “network friendly”. The structure and syntax are conducive to the handling of mis-friends and packet loss; H.264 application has a wide range of targets, which can meet the needs of different rates, different resolutions and different transmission (storage) occasions.

Technically, there are multiple flashes in the H.264 standard, such as unified VLC symbol encoding, high-precision, multi-mode displacement estimation, 4-block integer transform, hierarchical coding syntax. Wait. These measures make the H.264 algorithm have high coding efficiency, and can save about 50% of the code rate than H.263 under the same reconstructed image quality. H.264's code stream structure network has strong adaptability, increases error recovery capability, and can adapt well to IP and wireless network applications.

About DVD and H264 video format Question 1: On the computer, I see that the low-rate H264 format movie is not worse than the DVD in terms of resolution, but the capacity is only about 2/5 of the DVD, which is why? In this case, why not replace the DVD with H264? In this way, can a D5 disc be loaded with more high-definition movies? Question 2: According to the DVD, the resolution should be higher than that of H264 (after all, many H264s are converted from DVD), but when I look at the DVD directly on the computer, I find that the resolution is only 720X480, and the resolution of the general H264 is The rate is all at 960X540 (higher than DVD). Is it true that those 960X540 H264 format video compression sources are from Blu-ray DVD format or HDV but it is said that Blu-ray and HD-DVD can use higher technology (higher rate) Ordinary DVDs have a maximum of 9 Mbps/s to replay digital video. In fact, these are not the keys to the problem. I want to ask why the high-rate DVD is viewed on a computer monitor (no H264 format video). Compared with the large-screen color TV, the resolution is not as low as the H264 (the video bit rate is only 1411Kbps, but 1.4Mbps) and the 1080P HD (the next one, the video bit rate is equivalent to the ordinary DVD). , about 5Mbps)? Is DVD MPEG-2 compression technology really out of date, resulting in a large amount of data to suppress, but the effect is not comparable to the amount of data is much smaller than its H264? Question 1: H264 with low bit rate has high hardware requirements. The general computer configuration can't be seen at all. Watching DVD is P3 is enough. Question 2: The real H264 resolution is 720P, 1080I, 1080P, and there is no 960X540. The H264 quality after the transfer is incomparable with the original. The original H264 is film-converted, not Blu-ray or DVD-ROM. Which 950X540 formats on the Internet are partly from HD and Blu-ray, and some are from TV HD. of.
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