At present, the ASP (acive Server Pages) technology has been popular all over the world, on the internet almost everywhere can see its figure. It provides developers with intuitive, fast and efficient application development tools based on script,
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This an implementation of base64 as described in rfc4648 (the base16, base32, and base64 data encodings) for the Lotus Notes environment.
Base64 is an algorithm to encode binary data into a ASCII text
In PHP5.1.6, 4.4.4, and earlier versions, when you look for the encoding of "htmlspecialchars () andhtmlentities, A possible buffer overflow may be triggered when the UTF-8 encoding is selected. "Whileweweresearchingfora
In PHP5.1.6, 4.4.4, and
In PHP5.1.6, 4.4.4 and previous versions, a possible buffer overflow may be triggered when the UTF-8 encoding is selected when searching for the associated character encoding for "htmlspecialchars () and Htmlentities ()".
"While we are were
In PHP5.1.6, 4.4.4 and previous versions, a possible buffer overflow may be triggered when the UTF-8 encoding is selected when searching for the associated character encoding for "htmlspecialchars () and Htmlentities ()".
"While we are were
Static Image Compression and is applicable to consecutive color or grayscale images. It consists of two parts:1. distortion-free Coding Based on DPCM (spatial Linear Prediction) technology, 1. distortion-free Algorithms Based on DCT (discrete cosine transformation) and Harman coding,The compression ratio is very small, and the latter algorithm is mainly used.The most common method in nonlinear editing is the MJPEG algorithm, that is, motion JPEG.It c
size of your video. And the most common image compression algorithm we know is JPEG. JPEG is the abbreviation for Joint Photographic Experts Group (joint Image Expert Group) and is the first international image compression standard.First, JPEG compression is the YUV color component of the image encoded separately, the main algorithm used is DCT (DCT for discrete cosine Transform, discrete cosine transform). It is a transformation related to the Fourier transform, which resembles a discrete Four
--enable-demuxer=rawvideo--enable-muxer= RTSP--enable-demuxer=rtsp--ENABLE-DEMUXER=SDP--enable-parser=h264--enable-parser=aac--enable-protocol=fiLe--enable-protocol=tcp--enable-protocol=rtmp--enable-protocol=cache--enable-protocol=pipe--enable-filter= Aresample--enable-filter=allyuv--enable-filter=scale--enable-indev=v4l2--enable-indev=alsa--enable-encoder= H264_OMX--enable-hwaccel=h264_mmal--enable-decoder=h264_mmal Make sudo make install ---------
JPEG data directly saved as a file is a JPG image, a series of JPEG images to follow the storage is the MJPEG format of the video format. High MJPEG encoding compared to x264 encoding, but large data volume (low compression rate and low distortion rate)
Three types of data:
camera output YUV data
There are many kinds of YUV data, such as yuv420,yuv422,yuv422p and so on, for some video encoding, it can onl
Video Broadcast Technology details Series 3: Coding and Encapsulation,
There are a lot of technical articles on live broadcasting, and there are not many systems. We will use seven articles to give a more systematic introduction to the key technologies of live video in all aspects of the current hot season, and help live video entrepreneurs to gain a more comprehensive and in-depth understanding of live video technology, better technology selection.
Video Encoding is the third article in the liv
, I use C #, which allows shooting at the same time as multiple photo headers. This program allows synchronous imaging, not only several video headers on several video servers, but also many different types of photo headers to take photos at the same time. The program supports the following video resources:
Continuously update JPEG image resources;MJPEG (Dynamic JPEG) video stream;Some axis photo headers and Video Servers (205,206,210 0, 2110,212 0, 2
Key Concepts:
ES:
es--elementary Streams (Raw stream) is a data stream that comes directly from the encoder, which can be an encoded video data stream (H.264,mjpeg, etc.), an audio data stream (AAC), or other encoded data stream collectively. After the ES stream passes through the PES packager, it is converted into a PES package.
ES is a data stream that contains only one content, such as video only or aud
1 ) ES
es--elementary Streams (Raw Stream) is a data stream that comes directly from the encoder, so the encoded video data stream (H.264,mjpeg, etc.), audio data stream (AAC), or other encoded data stream is collectively referred to. After the ES stream passes through the PES packager, it is converted into a PES package.
ES is a data stream that contains only one content, such as video only or audio only,
optimization principles. In fact, the live video system of audio and video is a complex engineering system. To achieve a very low-latency live video, it requires complex system engineering optimization and familiarity with various components. Here we will share some simple and common tuning techniques.Code optimization
1. Make sure that the minimum latency setting is enabled for Codec. Codec usually has a low-latency optimization switch, especially for H.264. Many may not know H. 264 of the dec
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