如何连接code位图到使用媒体codeC视频？ [英] How to encode Bitmaps into a video using MediaCodec?

问题描述

我想EN codeA集位图，我已经成为一个H264的。通过MediaEn codeR这可能吗？我已经写了一些code，为了做到这一点，但输出不能在任何媒体播放器我已经试过播放。下面是一些code，我从我发现＃1其他来源主要是借来的。

I would like to encode a set of Bitmaps that I have into an h264. Is this possible via MediaEncoder? I have written some code in order to do it, but the output cannot be played in any media player I have tried. Here's some of the code that I primarily borrowed from other sources that I found on Stackoverflow.

mMediaCodec = MediaCodec.createEncoderByType("video/avc");
mMediaFormat = MediaFormat.createVideoFormat("video/avc", 320, 240);
mMediaFormat.setInteger(MediaFormat.KEY_BIT_RATE, 125000);
mMediaFormat.setInteger(MediaFormat.KEY_FRAME_RATE, 15);
mMediaFormat.setInteger(MediaFormat.KEY_COLOR_FORMAT, MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420Planar);
mMediaFormat.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, 5);
mMediaCodec.configure(mMediaFormat, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);
mMediaCodec.start();
mInputBuffers = mMediaCodec.getInputBuffers();

ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
image.compress(Bitmap.CompressFormat.PNG, 100, byteArrayOutputStream); // image is the bitmap
byte[] input = byteArrayOutputStream.toByteArray();

int inputBufferIndex = mMediaCodec.dequeueInputBuffer(-1);
if (inputBufferIndex >= 0) {
    ByteBuffer inputBuffer = mInputBuffers[inputBufferIndex];
    inputBuffer.clear();
    inputBuffer.put(input);
    mMediaCodec.queueInputBuffer(inputBufferIndex, 0, input.length, 0, 0);
}

我应该怎么调整？

What should I adjust?

推荐答案

媒体codeC 是一个原始的H.264基本流的输出。我发现，图腾媒体播放器的Linux是能够发挥他们。

The output of MediaCodec is a raw H.264 elementary stream. I've found that the Totem media player for Linux is able to play them.

你真正想要做的是输出转换为.MP4​​文件。 （更新：）的Andr​​oid 4.3（API 18）推出的 MediaMuxer 类，它提供了一种方法将原始数据（加上一个可选音频数据流）转换为一个的MP4文件。

What you really want to do is convert the output to a .mp4 file. (Update:) Android 4.3 (API 18) introduced the MediaMuxer class, which provides a way to convert the raw data (plus an optional audio stream) to a .mp4 file.

在数据的布局的ByteBuffer 是，由于Android 4.3的，设备相关。 （事实上​​，并非所有的设备都支持 COLOR_FormatYUV420Planar - 一些preFER半平面变种）我不能告诉你，不知道你的设备的精确布局，但我可以告诉你，它想uncom pressed数据，所以传递COM pressed PNG数据是行不通的。

The layout of data in the ByteBuffer is, as of Android 4.3, device-dependent. (In fact, not all devices support COLOR_FormatYUV420Planar -- some prefer a semi-planar variant.) I can't tell you the exact layout without knowing your device, but I can tell you that it wants uncompressed data, so passing in compressed PNG data is not going to work.

（更新：）的Andr​​oid 4.3还允许表面输入媒体codeC 连接codeRS，所以任何可以渲染与OpenGL ES的可记录。举一个例子，看到恩codeAndMuxTest样品这里。

(Update:) Android 4.3 also allows Surface input to MediaCodec encoders, so anything you can render with OpenGL ES can be recorded. For an example, see the EncodeAndMuxTest sample here.

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