谁能告诉我手机上用H265实时编码有什么鸟用?
一、先看看手机支持哪些codec
ALL_CODECS
REGULAR_CODECS
mine-type
选择mime-type为video/hevc,得到 <OMX.hisi.video.encoder.hevc>,这是华为海思芯片支持的h265硬编码,赞一个!
public static MediaCodecInfo selectCodec(String mimeType) {
int numCodecs = MediaCodecList.getCodecCount();
for (int i = 0; i < numCodecs; i++) {
MediaCodecInfo codecInfo = MediaCodecList.getCodecInfoAt(i);
if (!codecInfo.isEncoder()) {
continue;
}
String[] types = codecInfo.getSupportedTypes();
for (int j = 0; j < types.length; j++) {
if (types[j].equalsIgnoreCase(mimeType)) {
return codecInfo;
}
}
}
return null;
}
二、通过硬编码器进行编码
1. 先学习一下H265的帧,
NAL_UNIT_TYPE,其中SPS & PPS & SEI & IDR 的时间戳相同,参考H264的NAL单元详解
frame | 7 | 8 | 6 | 26 | 1 |
name | SPS | PPS | SEI | IDR | data |
description |
2. 配置编码器
String option = "bitrate=" + encodeBitrate;
int pos = option.indexOf("bitrate=");
if (pos != -1) {
mEncodeBitrate = Integer.valueOf(
(String) option.subSequence(pos + "bitrate=".length(), option.length()));
Log.i(TAG, "setEncoderOption, mEncodeBitrate : " + mEncodeBitrate);
}
MediaFormat mediaformat = null;
mediaformat = MediaFormat.createVideoFormat(H265_MIME, mWidth, mHeight);
mediaformat.setInteger(MediaFormat.KEY_BIT_RATE, this.mEncodeBitrate);
mediaformat.setInteger(MediaFormat.KEY_FRAME_RATE, encodeFrameRate);
mediaformat.setInteger(MediaFormat.KEY_COLOR_FORMAT, encodeFormat);
mediaformat.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, iFrameInterval);
mEncodeCodec.configure(mediaformat, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);