如何使用MediaCodec在Android中使用软件编解码器 [英] how to use software codec in android using mediacodec
问题描述
我想使用Mediacodec软件编解码器将yuv数据编码为h264.
In my i want encode yuv data into h264 using mediacodec software codec.
我使用Google软件编码器 OMX.google.h264.encoder
I use Google software encoder OMX.google.h264.encoder
当我使用硬件编码器[OMX.qcom.video.encoder.avc]可以正常工作时，但是当我使用软件编码器[OMX.google.h264.encoder]时，它不对文件进行编码.它将给出错误信息[请参阅日志].
when i use hardware encoder[OMX.qcom.video.encoder.avc] that time it work but when i use software encoder[OMX.google.h264.encoder] it not encode file.it will give error [see in log].
我无法确定是什么问题.
what is problem i couldn’t identify.
来源:
mediaCodec = MediaCodec.createByCodecName("OMX.google.h264.encoder");
//mediaCodec = MediaCodec.createByCodecName(codecInfo.getName());
Log.i(TAG,"codec name : "+ mediaCodec.getName());
int mBitrate = (int) ((MainActivity.mHeight * MainActivity.mWidth * MainActivity.frameRate)*2*0.07);
MediaFormat mediaFormat = MediaFormat.createVideoFormat("video/avc",MainActivity.mWidth,MainActivity.mHeight);
mediaFormat.setInteger(MediaFormat.KEY_BIT_RATE,mBitrate);
mediaFormat.setInteger(MediaFormat.KEY_FRAME_RATE, MainActivity.frameRate);
// mediaFormat.setInteger(MediaFormat.KEY_MAX_INPUT_SIZE, 320*240);
mediaFormat.setInteger(MediaFormat.KEY_COLOR_FORMAT,colorFormat);
//mediaFormat.setInteger(MediaFormat.KEY_COLOR_FORMAT,MediaCodecInfo.CodecProfileLevel.AVCLevel12);
mediaFormat.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL,1);
try{
mediaCodec.configure(mediaFormat, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);
mediaCodec.start();
Log.i(TAG,"H264 Encoder init success");
}catch(IllegalArgumentException e)
{
e.printStackTrace();
}catch (IllegalStateException e) {
e.printStackTrace();
}catch (Exception e) {
e.printStackTrace();// TODO: handle exception
}
但是我遇到了这个错误.
But i getting this error.
日志:
I/H264Encoder(7772): outputStream initialized
I/OMXClient(7772): Using client-side OMX mux.
I/H264Encoder(7772): found colorFormat: 21
I/OMXClient(7772): Using client-side OMX mux.
E/OMXMaster(7772): A component of name 'OMX.qcom.audio.decoder.aac' already exists, ignoring this one.
I/SoftAVCEncoder(7772): Construct SoftAVCEncoder
I/H264Encoder(7772): codec name : OMX.google.h264.encoder
E/SoftAVCEncoder(7772): internalSetParameter: StoreMetadataInBuffersParams.nPortIndex not zero!
E/OMXNodeInstance(7772): OMX_SetParameter() failed for StoreMetaDataInBuffers: 0x80001001
E/ACodec(7772): [OMX.google.h264.encoder] storeMetaDataInBuffers (output) failed w/ err -2147483648
I/ACodec(7772): setupVideoEncoder succeeded
I/H264Encoder(7772): H264 Encoder init success
E/SoftAVCEncoder(7772): Video frame size 1920x1080 must be a multiple of 16
E/SoftAVCEncoder(7772): Failed to initialized encoder params
E/ACodec(7772): [OMX.google.h264.encoder] ERROR(0x80001001)
E/MediaCodec(7772): Codec reported an error. (omx error 0x80001001, internalError -2147483648)
W/System.err(7772): java.lang.IllegalStateException
W/System.err(7772): at android.media.MediaCodec.getBuffers(Native Method)
W/System.err(7772): at android.media.MediaCodec.getInputBuffers(MediaCodec.java:542)
W/System.err(7772): at com.ei.encodertest.H264Encoder.offerEncoder(H264Encoder.java:170)
W/System.err(7772): at com.ei.encodertest.MainActivity$ReadRawFileTask.doInBackground(MainActivity.java:113)
W/System.err(7772): at com.ei.encodertest.MainActivity$ReadRawFileTask.doInBackground(MainActivity.java:1)
W/System.err(7772): at android.os.AsyncTask$2.call(AsyncTask.java:288)
W/System.err(7772): at java.util.concurrent.FutureTask.run(FutureTask.java:237)
W/System.err(7772): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
W/System.err(7772): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
W/System.err(7772): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
W/System.err(7772): at java.lang.Thread.run(Thread.java:841)
推荐答案
SW编码器OMX.google.h264.encoder目前非常有限(在Android 5.0上)，几乎无法使用.
The SW encoder OMX.google.h264.encoder is very limited at the moment (edit: On Android 5.0), close to being unusable.
此编码器不允许使用不是16的倍数的分辨率.在您的情况下，1920x1080，高度1080不能被16均分，因此该编码器不可接受. (请参见 https://android-review.googlesource.com/38904 尝试进行修复这个.)
This encoder doesn't allow using resolutions that aren't a multiple of 16. In your case, 1920x1080, the height 1080 isn't evenly dividable by 16, and thus isn't acceptable for this encoder. (See https://android-review.googlesource.com/38904 for an attempt at fixing this.)
如果将其更改为1088，则16的倍数将不是问题，但是编码器也不允许您将其用于任何高于352x288的分辨率(请参见例如
If you'd change it into 1088, the multiple-of-16 wouldn't be an issue, but the encoder also won't allow you to use it with any resolution above 352x288 (see e.g. https://android-review.googlesource.com/82133).
最后，在旧版Android版本(5.0之前的版本)上，它的输出格式也略有不同(缺少起始代码，请参见 https://android-review.googlesource.com/42321 )，这意味着您必须在每个输出数据包的开头手动添加起始码，才能在某些地方使用它们(尽管MediaMuxer可能已经按原样处理了，但这主要是偶然的).
Finally, on older Android versions (prior to 5.0), it also did output in a slightly different format (missing startcodes, see https://android-review.googlesource.com/42321), which meant that you would have to manually add startcodes at the start of each output packet to be able to use them in certain places (the MediaMuxer might have handled it as it was, though, mostly by chance).
在当前的AOSP主版本中(也就是说，可能在下一个主要版本中，除非已完成定稿，并且未在其中包含此更改)，编码器已替换为功能更强大的编码器，但对于现有的编码器发布，除了在您的应用程序中捆绑更好的SW编码器外，您无能为力.
In the current AOSP master (that is, maybe in the next major release, unless that already is being finalized and this change hasn't been included there), the encoder has been replaced with a more capable one, but for existing releases, there's not much you can do other than bundling a better SW encoder within your app.
今天发布的Android M预览确实包含新的SW编码器，该编码器在此用例中应该可以正常工作.
The Android M preview that was released today does include the new SW encoder, which should work fine for this usecase.
Edit2:新的编码器已包含在Android 6.0版本(M)中，因此从那时起，它应该是可用的.
The new encoder was included in the Android 6.0 release (M), so since then, it should be usable.
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