如何在Android视频视图中设置不同的视频质量,如auto,360p,720p等?

时间:2016-09-07 03:49:54

标签: android android-studio video android-videoview

伙计们,我在视频中坚持视频质量。如何在视频中更改视频质量。帮帮我

1 个答案:

答案 0 :(得分:0)

如果您使用public class WaveFile { public final int NOT_SPECIFIED = AudioSystem.NOT_SPECIFIED; // -1 public final int INT_SIZE = 4; private int sampleSize = NOT_SPECIFIED; private long framesCount = NOT_SPECIFIED; private int sampleRate = NOT_SPECIFIED; private int channelsNum; private byte[] data; // wav bytes private AudioInputStream ais; private AudioFormat af; private Clip clip; private boolean canPlay; public WaveFile(File file) throws UnsupportedAudioFileException, IOException { if (!file.exists()) { throw new FileNotFoundException(file.getAbsolutePath()); } ais = AudioSystem.getAudioInputStream(file); af = ais.getFormat(); framesCount = ais.getFrameLength(); sampleRate = (int) af.getSampleRate(); sampleSize = af.getSampleSizeInBits() / 8; channelsNum = af.getChannels(); long dataLength = framesCount * af.getSampleSizeInBits() * af.getChannels() / 8; data = new byte[(int) dataLength]; ais.read(data); AudioInputStream aisForPlay = AudioSystem.getAudioInputStream(file); try { clip = AudioSystem.getClip(); clip.open(aisForPlay); clip.setFramePosition(0); canPlay = true; } catch (LineUnavailableException e) { canPlay = false; System.out.println("I can play only 8bit and 16bit music."); } } public boolean isCanPlay() { return canPlay; } public void play() { clip.start(); } public void stop() { clip.stop(); } public AudioFormat getAudioFormat() { return af; } public int getSampleSize() { return sampleSize; } public double getDurationTime() { return getFramesCount() / getAudioFormat().getFrameRate(); } public long getFramesCount() { return framesCount; } /** * Returns sample (amplitude value). Note that in case of stereo samples * go one after another. I.e. 0 - first sample of left channel, 1 - first * sample of the right channel, 2 - second sample of the left channel, 3 - * second sample of the rigth channel, etc. */ public int getSampleInt(int sampleNumber) { if (sampleNumber < 0 || sampleNumber >= data.length / sampleSize) { throw new IllegalArgumentException( "sample number can't be < 0 or >= data.length/" + sampleSize); } byte[] sampleBytes = new byte[4]; //4byte = int for (int i = 0; i < sampleSize; i++) { sampleBytes[i] = data[sampleNumber * sampleSize * channelsNum + i]; } int sample = ByteBuffer.wrap(sampleBytes) .order(ByteOrder.LITTLE_ENDIAN).getInt(); return sample; } public int getSampleRate() { return sampleRate; } public Clip getClip() { return clip; } } 来传输视频,我建议您使用HLS并在服务器端处理它,同时您还可以了解如何设置视频质量here