flv codec

The following content of this article will be updated here: "http-flv Live Module (nginx-http-flv-module) based on Nginx-rtmp-module module" continued. Note: Many of the configurations below are no longer available because the implementation is somewhat different from the earlier implementations. In order to see the history of the entire project, it has been retained, and the following update mentions why s

, need Samplingfrequencyindex This information, samplingfrequencyindex the most accurate information is in Audiospecificconfig , so the audiospecificconfig is parsed and Samplingfrequencyindex is obtained. In this step, you can completely extract the audio information and data from the FLV file and send it to the audio decoder for normal playback. Video Tags If the tagtype==9 in the tag package, it means that the tag is video. The data after Streamid

format, this is the decoder common format, is AAC's pure ES stream to be packaged into ADST format AAC file, The decoder will play properly. It is in packing ADST, need Samplingfrequencyindex This information, samplingfrequencyindex the most accurate information is in Audiospecificconfig , so the audiospecificconfig is parsed and Samplingfrequencyindex is obtained. In this step, you can completely extract the audio information and data from the FLV

Nginx-rtmp-mudule rtmp is an excellent car-eye-http-flv-module is a streaming media server modified on Nginx-rtmp-mudule rtmp basis, in addition to support Flash player, Players that are now common are also supported. A perfect way to achieve the HTTP mode of FLV Live Function.This article briefly introduces the main functions and use of the module:Function All features provided by Nginx-rtmp-modul

DaVinci is a DSP and arm dual-core architecture of the SOC chip. The interaction between the chip and the outside is managed via arm-side MontaVista Linux and related drivers and applications, and the DSP end only deals with codec-related algorithms. The communication and interaction between DSP and arm is done through the engine (Engine) and the servers (server).1. Codec engine (

Copy CodeThe code is as follows: function Bigendian2int ($byte _word, $signed = False) {$int _value = 0;$byte _wordlen = strlen ($byte _word);for ($i = 0; $i {$int _value + = Ord ($byte _word{$i}) * POW ($byte _wordlen-1-$i));}if ($signed){$sign _mask_bit = 0x80 if ($int _value $sign _mask_bit){$int _value = 0-($int _value ($sign _mask_bit-1));}}return $int _value;}function GetTime ($name) {if (!file_exists ($name)) {Return}$flv _data_length=file

experiences 1. Build FFMPEG + mencoder Environment 1) OverviewMany codec protocols and specialized formats defined by various companies in the audio and video industry make the current video and audio files complicated. The formats supported by FFMPEG alone do not fully include all types, at least SWF, the current version of rmvb (rv4) is not supported. at the same time, wma9 seems to be supported. but not tested. at the same time, mencoder suppo

Mencoder "/home/guo/Videos/hp. flv "-o"/home/guo/Videos/hp/outfile. flv "-of lavf-oac mp3lame-lameopts abr: br = 56-ovc lavc-lavcopts vcodec = flv: vbitrate = 5000: mbd = 2: mv0: trell: v4mv: cbp: last_pred = 3: dia = 4: cmp = 6: vb_strategy = 1-vf scale = 512:-3-ofps 12-srate 22050-ss-endpos Mencoder "/home/guo/Videos/hp. avi "-o"/home/guo/Videos/hp/outfile.

Step One: We open the PPT 2007 software, and then we click on the PowerPoint option in the upper right corner---common---tick "then we'll find the Developer tab", OK now there's a developer tab in the PPT menu. Step Two: Now we create a Shockwave Flash Object object instance in ppt, then we then in "Development toolbar"-"Control"---"Other controls", then we click "Shockwave Flash Object", click OK, If there is to show that the same is xxx. Now open the interface we click to s

(SECAM)-Set dv1394 to capture dv1394-AV device: Set audio devices such as/dev/DSP -Map File: stream sets the input stream ing.-Debug: Print specific debugging information-Benchmark indicates the benchmark test time.-Hex dumping each input package-Bitexact only uses a bit Precise Algorithm for Codec testing.-PS size: Set the package size, in bits.-Re reads data at a local frame rate, which is mainly used to simulate capturing devices.-Loop input strea

The AMF (Action message Format) is a common binary encoding mode for Flash and server communications, which is highly efficient and can be transmitted at the HTTP level. Many flash webgame now use such a message format.The AMF protocol is based on the HTTP protocol.Its content processing process is roughly like this:1. Get the HTTP request (requests) stream from the client.2. Convection for serialization (deserialize), get the data that the server-side program can recognize and establish a respo

Description of the problem; get the thumbnail and video time length of the FLV video Google for half a day found that you can use FFmpeg to get some information about the video, first introduce FFMEPG Here's a simple: FFmpeg is a complete solution for recording, converting, and streaming audio and video, a leading audio/video codec class library. Official official version FFmpeg does not support

format data processing functions can be implemented by modifying the program.PrincipleThe FLV Encapsulation format consists of an FLV header file head and a single tag. The tag contains audio data as well as video data. The structure of the FLV is as shown.The format for FLV is no longer recorded in this article. can

An exception occurred while encoding: Java.lang.NoSuchMethodError:No static Method Encodebase64string ([B) ljava/lang/string; in class lorg/apache/commons/ Codec/binary/base64; or its Super classes (Declaration of ' org.apache.commons.codec.binary.Base64 ' appears in/system/framework/ Org.apache.http.legacy.boot.jar) Decoding problem: Java.lang.NoSuchMethodError:No static method DecodeBase64 (ljava/lang/string;) [B in class lorg

EncoderAaclcenc_path =$ (external_sw_root)/c674x_aaclcenc_01_00_01_00_elfAaclcenc_include =$ (Aaclcenc_path)/packages## #2. Add codec to compile list:Ti_tools/rpe/remote-processor-execute/src/config/codecs.mkInclude_codec_interfaces = Aaclcdecaaclcenc3. Updating the client configuration fileTi_tools/rpe/remote-processor-execute/src/config/client_config.c/* GET structure definitions for Aaclcaudio Decoder Interface */#include #include Because the AAC

EncoderAaclcenc_path =$ (external_sw_root)/c674x_aaclcenc_01_00_01_00_elfAaclcenc_include =$ (Aaclcenc_path)/packages## #2. Add codec to compile list:Ti_tools/rpe/remote-processor-execute/src/config/codecs.mkInclude_codec_interfaces = Aaclcdecaaclcenc3. Updating the client configuration fileTi_tools/rpe/remote-processor-execute/src/config/client_config.c/* GET structure definitions for Aaclcaudio Decoder Interface */#include #include Because the AAC

Problem description; obtain the thumbnail and video duration of the flv video. Google found that Ffmpeg can be used to obtain video information for half a day. First, let's introduce FFMEPG. Here, I will briefly describe: FFmpeg is a complete solution for recording, conversion, and streaming audio and video. It is a leading Audio/Video Codec class library. Official official ffmpeg does not support rmvb a

the left, and the converted video on the right: Everyone will think that the quality of the converted file has dropped a lot. This is indeed the case. At the same time, we can find that the converted file has changed from 13 M to 1 M. To improve the quality, you can change vbitrate = 500 to vbitrate = 5000. Comparison of converted results: the original video on the left and the converted video on the right: The quality is almost the same, but at the same time, the conversion file is changed t

Import com.sun.image.codec.jpeg. Unable codec fails to find the package, and cannot find the export CodecImport com.sun.image.codec.jpeg. Unzip codec; To process images in Eclipse, You need to introduce two packages:Import com.sun.image.codec.jpeg. Unzip codec;Import com.sun.image.codec.jpeg. encode imageencoder;Error:Access restriction: The type specified image

Build and codec of The Harman tree, and build codec of The Harman tree /* * Implementation process: the user first constructs the User-Defined tree using the HuffmanTree () function, and then * starts from the bottom up (that is, starting from the node where the array serial number is zero) in the main () function) it is determined from the above layer. If it is on the left side of * parent node, it is set