audio codec download

Audio codec and real-combat article (1) PCM go to AAC (AAC encoding)Author: Liu · Poechant Blog: blog.csdn.net/poechant e-mail: zhongchao.ustc@gmail.com Date: April 7th, 2012 This uses FAAC to implement AAC encoding. 1 Download and install FAAC The installation process here is implemented on MAC and Linux, and windows can be similar to the reference. wget http://

before recording the codec of your own learning audio, let's add a bit of hardware knowledgeA series of processors from the 8086 instruction set, known as the x86 processor, 8086 is the oldest 16-bit x86 processor, so the software is labeled I386, indicating that the software is 32-bit, based on the x86 processor , all 32-bit and 64-bit x86 processors can be run (unless the software is marked with a minimum

G.723.1 specifies a coded representation that can be used for compressing the speech or other audio signal component of multimedia services at a very low bit rate. in the design of this coder, the principal application considered was very low bit rate Visual Telephony as part of the overall H.324 family of standards. G.723.1 has two bit rates associated with it. these are 5.3 and 6.3 kbit/s. the higher bit rate has greater quality. the lower bit rate

wave_format_vivo_g723112 wave_format_vivo_siren123 wave_format_digital_g723125 wave_format_sanyo_ld_adpcm130 wave_format_siprolab_aceplnet131 wave_format_siprolab_acelp4800132 wave_format_siprolab_acelp8v3133 wave_format_siprolab_g729134 wave_format_siprolab_g729a135 wave_format_siprolab_kelvin140 wave_format_g1_adpcm150 wave_format_qualcomm_purevoice151 wave_format_qualcomm_halfrate155 wave_format_tubgsm160 wave_format_msaudio1170 wave_format_unisys_nap_adpcm171 wave_format_unisys_nap_ulaw172

This uses FAAC to implement AAC encoding. In addition, the data segment of WAV is PCM, the code will appear many PCM abbreviations. 1 Download and install FAAC The installation process here is implemented on MAC and Linux, and windows can be similar to the reference. wget http://downloads.sourceforge.net/faac/faac-1.28.tar.gz tar zxvf faac-1.28.tar.gz cd faac-1.28 . Configure make sudo make install If prefix path is used in the default configure, t

1. Open http://www.ffmpeg.org/, click Download2. Enter http://www.ffmpeg.org/download.html, if the Windows version is clicked in the middle of the picture, appears Windows Builds, click Enter3. Click on the following link to download the page after entering4. If you want to convert F:\work\ picture \hour.mp4 to Hour.ogg fileA. Open F:\work\ picture \, choose this folder a blank place press shift+ mouse right click, in the command window called "Open c

Python back-end write download file, this time there was this errorlatin-1 codec cant encode characters in position 42-48:ordinal not in range256What to do:Check cause: Found file name has Chinese name, so cause error, encoding is LATIN-1 encoding, so we need to decode into Unicode encoded into latin-1Look at the code first:This code involves a Python transcoding problem, be sure to note File

Is the top new AV poisonous? Small series of personal testing, this software is non-toxic, but there will be advertising, because the development team must have a certain funding support, so there will be some ads, but it will not affect the user's view. What are the features of the top new AV? 1. Top New AV Cloud technologyTop new audio and video first developed based on P4P cloud architecture products, whether it is a movie search, or online play

); LOGE ("Convert to RGBA format") Ffmpegvideo->swscontext = Sws_getcontext (ffmpegvideo->codec->width,ffmpegvideo-> CODEC->HEIGHT,FFMPEGVIDEO->CODEC->PIX_FMT, Ffmpegvideo->codec->width , Ffmpegvideo->codec->height,av_pix_fmt_rgba, sws_bicubic,null,null,null); Get a frame of

Android audio and video goes deep into 18 FFmpeg to play videos with sound (source code download) and androidffmpeg Project addressHttps://github.com/979451341/AudioVideoStudyCodeTwo/tree/master/FFmpegv%E6%92%AD%E6%94%BE%E8%A7%86%E9%A2%91%E6%9C%89%E5%A3%B0%E9%9F%B3%EF%BC%8C%E6%9A%82%E5%81%9C%EF%BC%8C%E9%87%8A%E6%94%BE%E3%80%81%E5%BF% AB %E8%BF%9B%E3%80%81%E9%80%80%E5%90%8EThis project was written by the sim

. Register all componentsAv_register_all ();Initial network FlowAvformat_network_init ();Encapsulates the format context, dominates the global structure, and holds information about the format of the video file encapsulationPformatctx = Avformat_alloc_context ();2. Open the input video fileif (Avformat_open_input (pformatctx,input_str,null,null)!=0) {LOGE ("couldn ' t open input stream.\n");return-1;}3. Get video File informationif (Avformat_find_stream_info (pformatctx,null) LOGE ("couldn ' t f

Author: Yang xingping The resources on the Internet are really rich and colorful, such as MP3, movie and TV series, and funny cartoons and Flash. However, in the face of the vast Internet, A lot of netizens often look at the Internet and sigh, because some resources are difficult to save to a local computer to listen to or watch them again using the conventional method. Today, we will introduce the "audio and video probe". This software not only finds

The address of this project, ask Starhttps://github.com/979451341/Audio-and-video-learning-materials/tree/master/FFmpeg%E6%92%AD%E6%94%BE%E8%A7%86%E9%A2%91First FFmpeg is written in C, so we need the NDK technology, and then I use the NDK to use CMake, the first is to say how to import FFmpeg project, using my method to import ffmpeg not a minute.This requires you to first download the project code in the a

The address of this project, ask Starhttps://github.com/979451341/Audio-and-video-learning-materials/tree/master/FFmpeg%E6%92%AD%E6%94%BE%E8%A7%86%E9%A2%91First FFmpeg is written in C, so we need the NDK technology, and then I use the NDK to use CMake, the first is to say how to import FFmpeg project, using my method to import ffmpeg not a minute.This requires you to first download the project code in the a

This project address, the name is recorded video, for starHttps://github.com/979451341/Audio-and-video-learning-materialsThis time the code record video can be used in each player, sometimes long display, compared to the previous code to say why the two effects are different, but I first add some of the previously missing Mediacodec official notes and Mediacodec.bufferinfo1.MediaCodec SupplementBUFFER_FLAG_CODEC_CONFIG: Hint flags and other specific d

); audioTrack.play();}//C传入音频数据public void playTrack(byte[] buffer, int lenth) { if (audioTrack != null audioTrack.getPlayState() == AudioTrack.PLAYSTATE_PLAYING) { audioTrack.write(buffer, 0, lenth); }}Let's take a look at the C + + codeFirst register the component and then get the audio stream av_register_all();AVFormatContext *pFormatCtx = avformat_alloc_context();//openif (avformat_open_input(pFormatCtx, input, NULL, NULL) != 0) {

Android audio and video goes deep into the 16 FFmpeg streaming mobile phone camera to achieve live broadcast (with source code download), androidffmpeg Source Code addressHttps://github.com/979451341/RtmpCamera/tree/masterAfter configuring the RMTP server, paste it here.1. Configure the RTMP Server I don't want to post two blogs on mac and windows respectively.Set up an RTMP server on MACHttps://www.jianshu

it to yuv420p formatmemcpy(pFrameYUV->data[0], in, y_length); //YpFrameYUV->pts = count;for (int i = 0; i Encode Avframe dataAvcodec_send_frame (Pcodecctx, PFRAMEYUV);Get the data obtained after encodingAvcodec_receive_packet (Pcodecctx, ENC_PKT);Release AvframeAv_frame_free (PFRAMEYUV);Configure the encoded data, set the playback time, etc.enc_pkt.stream_index = video_st->index;AVRational time_base = ofmt_ctx->streams[0]->time_base;//{ 1, 1000 };enc_pkt.pts = count * (video_st->time_base.den)

*) windowbuffer.bits; int dststride = windowbuffer.stride * 4; uint8_t *src = (pframergba->data[0]); int srcstride = pframergba->linesize[0]; Because the window's stride and the stride of the frame are different, it is necessary to copy the int h line by row; for (h = 0; h This wants to really master, need to avfilter.c at least two times, because the following four structures have not seen their internal memberstypedef struct AVFILTERCONTE

Android audio and video goes deep into an AudioRecord recording to generate pcm into wav (with source code download), androidaudiorecord This project address is named AudioRecord recording (can be paused, convert pch to wav ).Https://github.com/979451341/Audio-and-video-learning-materialsHere is an official description1. AndioRecord Overview The main function of