VideoEncoder.java 文件源码

/**
 * choose the video encoder by mime. API 21+
 */
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
private MediaCodecInfo chooseVideoEncoderAPI21(String mime) {
  MediaCodecList mediaCodecList = new MediaCodecList(MediaCodecList.ALL_CODECS);
  MediaCodecInfo[] mediaCodecInfos = mediaCodecList.getCodecInfos();
  for (MediaCodecInfo mci : mediaCodecInfos) {
    if (!mci.isEncoder()) {
      continue;
    }
    String[] types = mci.getSupportedTypes();
    for (String type : types) {
      if (type.equalsIgnoreCase(mime)) {
        Log.i(TAG, String.format("videoEncoder %s type supported: %s", mci.getName(), type));
        MediaCodecInfo.CodecCapabilities codecCapabilities = mci.getCapabilitiesForType(mime);
        for (int color : codecCapabilities.colorFormats) {
          Log.i(TAG, "Color supported: " + color);
          //check if encoder support any yuv420 color
          if (color == FormatVideoEncoder.YUV420PLANAR.getFormatCodec()
              || color == FormatVideoEncoder.YUV420SEMIPLANAR.getFormatCodec()
              || color == FormatVideoEncoder.YUV420PACKEDPLANAR.getFormatCodec()) {
            return mci;
          }
        }
      }
    }
  }
  return null;
}