mp3

问题 Assume I have the id (The numbers and signs in the video's hyperlink after "http://www.youtube.com/watch?v=") of a Youtube video. How can I download the audio stream of the file to an sd-card as an mp3 with android code? (I wrote an application for 2.x but this part is missing). 回答1: Look at how some other YouTube scrapers do it, e.g. youtube-dl. Then recreate their algorithm in Java for Android. Then keep spending time trying to stay up-to-date with the capricious changes YouTube will make

问题 I created a thread to play an mp3 file in Java by converting it to an array of bytes. I'm wondering if I can keep track of the current play position as the mp3 is being played. First, I set up my music stream like so: try { AudioInputStream in = AudioSystem.getAudioInputStream(file); musicInputStream = AudioSystem.getAudioInputStream(MUSIC_FORMAT, in); DataLine.Info dataLineInfo = new DataLine.Info(SourceDataLine.class, MUSIC_FORMAT); musicDataLine = (SourceDataLine) AudioSystem.getLine

问题 I took libmad example C file, and played an mp3, which played just fine. However, when I try to read the file in chunks, as opposed to the example, which reads the file in one go, I hear "breaks" and the playback is way too fast. Here's my input callback, and my output callback static enum mad_flow input(void *data, struct mad_stream *stream) { struct buffer *buffer = data; // char* raw_data[buffer->size]; // if(fgets(*raw_data, buffer->size, buffer->file) == NULL) { // file is finished! //

问题 For this I am using Python 2.7.13, Windows 10, and the eyed3 package as documented here. Goal: I am trying to create a script that can input any desired ID3 metadata for MP3 files that are missing information. Problem: The script appears to update the metadata correctly but fails to add the information to the "Details" screen of the MP3 properties (MP3 Details screen). However, if I first manually input data in those fields before running the script, it correctly both adds the metadata and

问题 AAC is an audio codec which was "Designed to be the successor of the MP3 format, AAC generally achieves better sound quality than MP3 at similar bit rates." (AAC on Wikipedia). However, similarly to MP3, parts of the AAC codec are patented, which means you can't simply use these codecs in all situations without making sure you are licensed to do so. This is also true if you developed your own encoder or decoder. This is because writing an own encoder or decoder frees you only from copyright

问题 I understand that mp3s sometimes contain album artwork (in my case, I'm working with podcast files). Is there a way in iOS to extract the image data from an mp3 file? 回答1: MP3s, including podcasts, do often have embedded metadata, including artwork. The easiest way to get the embedded metadata (for MP3s not in the iTunes library) is through the AVAsset class. If you are trying to get metadata over a network use the AVURLAsset instead, but accessing the metadata is the same with either.

问题 Which component to use to play mp3 files from streams/files and also to know the lenght in seconds of that mp3 stream? 回答1: You can also use the components at www.mitov.com which has an Audio suite that can handle this type of file. 回答2: You could use the Bass audio library. http://www.un4seen.com/ Search for "MP3" on the 3D Buzz site. They have a series of video tutorials that walk you through the creation of your own MP3 player in Delphi using this library. Free membership required. http:/

问题 I am trying to make a program which can join 2 MP3 files and save them on the android SD card. I have Java code that is working but when I try to convert it to Android it gives some error. In Java code is written below. It's working perfect. import java.io.*; public class TuneDoorJava { public static void main(String[] args) throws FileNotFoundException, IOException { FileInputStream fistream1 = new FileInputStream("F:\\aa.mp3"); // first source file FileInputStream fistream2 = new

问题 I'm trying to build an mp3 player for my site using JavaScript (and any plugins/frameworks(jQuery)/libraries that are relevant) & html5. So I built the player (more accurately, I implemented jPlayer), and now I want to make a visualizer. Ok maybe it's not a visualizer (all the names for ways to visualize sound always confused me), I guess what I want is something like this (Update: I just found out this is called a waveform): (source: anthonymattox.com) Or just something that graphs the

问题 Reading mp3 file from expansion file I have create and expansion file with name "main.1.com.example.app.obb" which contains and audio file name "about_eng.mp3" Now the issue i have written the following code to read and play the mp3 file private final static String EXP_PATH = "/Android/obb/"; static String[] getAPKExpansionFiles(Context ctx, int mainVersion, int patchVersion) { String packageName = ctx.getPackageName(); Vector<String> ret = new Vector<String>(); if (Environment