1, H.264 is the tenth part of MPEG4 is a standard. The standards proposed by the two foreign video expert groups (VCEG and MPEG) cooperation have each other, so they call H.264, also called AVC.
2, X264 is an encoder, and the standard he refers to H.264. The header, H.264 is a required coding format, and X264 is an open source project in accordance with H.264 standards, which is a simplified version of H264, and does not support certain advanced features. However, X264 is very excellent, and it is not poor than the commercial encoder of H264.
3, H264 and AVC1 are Fourcc (what do they usually use?) Fourcc is AVC1, there is no h.264 video that does not start code, mainly with MP4 or MKV and other packages, that is, you usually in the computer The kind of view, its data stream begins to represent length data. The x264 encoded is this. Fourcc is H264, which is a H.264 video with start code, usually used in wireless transmitting, wired broadcast or HD-DVD. The beginning of these data streams has a start code: 0x000001 or 0x00000001.
4. If the X264 encoder is not used in the encoding of the H.264 encoder, which encoder is usually used? (The one that supports the graphics card acceleration) is in line with the H.264 standard, which is the commercial encoder of H.264, and free X264. As for the encoding format that supports the acceleration of the graphics card, according to the graphics card, support is different. It is probably H264 (X264 / AVC1), VC-1, MPEG-1, MPEG-2, MPEG-4, WMV3. . . Of course, in addition to H264 (X264 / AVC1), others are not H.264 standards
What is the difference between H264 and X264? Seeing having a friend asking this question, but also because of the same decoder from the Filter of Properties during play, it is also a simple statement here. Friends of tablets help ...
The H264 is subordinate to MPEG-4 encoding. It is an encoding format of high-shipment. The advantage of H264 is that the minimum capacity in the current film and television file is that the disadvantage requires a large amount of calculation time, H264 support hardware acceleration, H264 supports self-change speed. Full frame technology (15fps-6000fps), the maximum feature of the H264 encoded is the suffix name .h264;
X264 is another open source coding format of H264. The beginning of "X" means "Software", is a video format using CPU soft decoding, characterized by quite fast, decoding, very slow and quite consumption CPU processing power The X264 does not support hardware acceleration, and the hardware decoding type as RMVB (the same manual GeForce7300 and GeForce9600 play H264, the CPU will have huge difference but play RMVB and X264 are not different), X264 does not support DE-block (area Mosaic Weak Conversion) Technology;
In a common piece source, the easiest identification method is that the container of H264 is. MKV, X264 container, MP4, X264 can be encapsulated in any form of audio format into MKV or AVI, H264 cannot be mp3, mp2, ogg, Frequent audio formats such as WAV, WMA are then packaged for MP4 or AVI (current H264 can only be equipped with AVC). On the contrast of the clarity, the capacity of X264 and H264 is less than X264 (Videostream comparison), and H264 even Lower computing, such as Celeron M530 (1.73GHz / 1MB / 533FSB), a separate graphics card with support hardware, can also play back 1080p H264, and X264 requires you have a powerful processor (X264 does not support hardware decoding) This is like the gap between EPSXE and VGS simulator: H264 needs banknotes, and X264 is required to temperature ... PS: It is not entirely complete, for 1200kbps-2500kbps / 640 * 480 / 30fps like this As required X264, it is very suitable for my processor (laugh), and it will not be too too card when playback (Rage Mobility only supports DX7). Generally, the compression is still the first choice X264, and it is true that the viewer will pay a little price (smile )
In addition, derived coding algorithms, common H263, VP6, VP7 and FLV4, H263 commonly known as FLV1, is currently playback coding format used in most online sites, the advantage is that the disadvantage of decoding speed is poor and the frame rate is poor; VP6 Based on the H264 encoding, the quality definition compression is higher than the high energy guaranteed frame rate, but the time spent at the time of encoding also highlights the disadvantage of H264; VP7 and FLV4 are new formats in the emerging foreign flow media site, using H264 encoding MP3 or AAC The container of the track package (such as Niconico and the soil), there is a stunning picture quality and audio quality in the case of minimal capacity (512 * 384), oh ... Recently I know that there is a strange name called "fritters" Cloth "XD
Reference from: https://blog.csdn.net/lutao614/article/details/22056837
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