audio

问题 In FFMPEG sofftware, AVPicture is used to store image data using data pointer and linesizes.It means all subtitles are stored in the form of picture inside ffmpeg. Now I have DVB subtitle and I want to dump picture of subtitles stored in AVPicture in a buffer. I know these images subtitles can be dump using for, fopen and sprintf. But do not know how to dump Subtitle.I have to dump subtitles in .ppm file format. Can anyone help me to dump picture of subtitles in buffer from AVSubtitle . 回答1:

问题 I'm trying to use ffmpeg/libswresample to resample streaming audio in my c++ application. Changing the sample width works well and the result sounds as one would expect; however, when changing the sample rate the result is somewhat crackly. I am unsure if it is due to incorrect usage of the libswresample library, or if I'm misunderstanding the resampling theory. Here is my resampling process, simplified for demonstration's sake: //Externally supplied data const uint8_t* in_samples //contains

问题 I have a fully functional AudioGraph system in place for a realtime voice chat. You can select the AudioCapture and AudioRender devices before and during the chat however I'd also like to be able to use Audio from the AudioRender devices for input on the AudioCapture graphs. How can I go about that? I currently have tried just selecting the device with the device Id however it gives the error: "DeviceNotAvailable" . for CreateAudioDeviceInputNodeResult result = await ingraph

问题 Haven't been able to do this yet! Anyone know a way to disable the audio feature in ReCaptcha? Thanks! 回答1: You can use CSS to hide the button: #recaptcha_switch_audio { display: none; } 来源： https://stackoverflow.com/questions/6604844/remove-audio-in-recaptcha

问题 I am implementing AVPlayer (not AVAudioPlayer) and trying to play audio from URL. It is working fine. But as we know that sometimes we can have invalid URL (URL that does not have Audio byte). When I play audio from any URL AVPlayer status shows always AVPlayerStatusReadyToPlay which is wrong. For example : In URL part if give invalid URL like : http://soundx.mp3slash.net/indian/jhankar_beats/1%28mp3pk.com%29.mp3 (it does not works even in your browser) and even if you give https:/

问题 I'm creating a queue system based on web, and i find it difficult on the audio part, i want audio playing sequencely, for example var sounds = [ new Audio("/audios/ding.wav"), new Audio("/audios/nomor_antrian.wav") ]; for (var i=0; i<sounds.length; i++) { sounds[i].play(); # If sounds[i] is stoped play sounds[i+1] <- what function in here } 回答1: Simply hold the current index of the audio you're playing, and increment it in HTMLAudio's ended event : var url = "https://dl.dropboxusercontent.com

问题 I am trying to use opensmile-2.3.0. When I run the following command (I moved all files in the vad folder to config folder): ./SMILExtract -I example-audio/media-interpretation.wav -C config/vad_opensource.conf -csvoutput vad.csv I got the error: (ERROR) [1] in cComponentManager : cannot add component (instname='lstmVAD' type='cRnnProcessor'): unknown component type!! (ERROR) [1] in cComponentManager : error during addComponent (returnVal=-1)! terminate called after throwing an instance of

问题 I need to convert wav file from FORMAT 1 to FORMAT 2 Format 1 : μ-law, 8000Hz, 64 kbps, mono FORMAT 2 : Container WAV Encoding PCM Rate 16K Sample Format 16 bit Channels Mono Following is the Code snippet : File file = new File("audio_before_conversion.wav"); AudioFormat audioFormat = new AudioFormat(16000, 16, 1, true , true); AudioInputStream audioInputStream1 = new AudioInputStream( new FileInputStream(file), audioFormat, numFrames); AudioSystem.write(audioInputStream1, Type.WAVE, new File

问题 I need to convert wav file from FORMAT 1 to FORMAT 2 Format 1 : μ-law, 8000Hz, 64 kbps, mono FORMAT 2 : Container WAV Encoding PCM Rate 16K Sample Format 16 bit Channels Mono Following is the Code snippet : File file = new File("audio_before_conversion.wav"); AudioFormat audioFormat = new AudioFormat(16000, 16, 1, true , true); AudioInputStream audioInputStream1 = new AudioInputStream( new FileInputStream(file), audioFormat, numFrames); AudioSystem.write(audioInputStream1, Type.WAVE, new File

问题 I need to convert wav file from FORMAT 1 to FORMAT 2 Format 1 : μ-law, 8000Hz, 64 kbps, mono FORMAT 2 : Container WAV Encoding PCM Rate 16K Sample Format 16 bit Channels Mono Following is the Code snippet : File file = new File("audio_before_conversion.wav"); AudioFormat audioFormat = new AudioFormat(16000, 16, 1, true , true); AudioInputStream audioInputStream1 = new AudioInputStream( new FileInputStream(file), audioFormat, numFrames); AudioSystem.write(audioInputStream1, Type.WAVE, new File