视频录制到字节数组，而无需编写到文件 [英] Record Video To Byte Array Without Writing To File

问题描述

我使用的是谷歌开发者实现自定义摄像机API指南;它使用 MediaRecorder 类来创建和管理摄像机的所有设置/操作。

I'm implementing a custom video camera using the Google Developer API Guide; it uses the MediaRecorder class to create and manage all the settings/operations of the video camera.

保存的事实，它采取的方式太长写入文件到手机（录音之后，这将是大约5分钟前，我甚至能看到下面的文件库的）它的工作，因为它应该。

Save for the fact that it's taking way too long to write the file to the phone (after recording, it'll be about 5 minutes before I even get to see the file under Gallery), it's working as it should.

但我不想要一个文件：我需要的原始字节数组的记录产生之前，它倾倒到一个文件中。

But I don't want a file: I need the raw byte array the recording produces, before it's dumped into a file.

MediaRecorder 甚至允许你这样做吗？我是在正确的方向？

Does MediaRecorder even allow you to do this? Am I in the right direction?

什么，我需要一个很好的例子是怎样的 PictureCallback 的的 onPictureTaken（） 方法给你一个字节数组，其中包含以字节为单位的图片。

A good example of what I need is how the PictureCallback's onPictureTaken() method gives you a byte array which contains the picture in bytes.

推荐答案

MediaRecorder 意很简单：告诉它的投入从何而来，给它一个文件写不出来，并让它运行。

MediaRecorder is intended to be simple: tell it where the inputs come from, give it a file to write to, and let it run.

如果你想要的东西更灵活，你需要使用媒体codeC 。你想并不真正存在，直到18 API（Android 4.3的），设置的功能

If you want something more flexible, you need to use MediaCodec. The set of features you want doesn't really exist until API 18 (Android 4.3).

Grafika 包括连续拍摄活动，其中记录H.264视频循环缓冲区中记忆，当你点击捕捉将当前帧集合到一个文件中。这是只有视频;如果你想要的音频，你需要处理的分别。

Grafika includes the "Continuous capture" activity, which records H.264 video to a circular buffer in memory, and writes the current set of frames to a file when you hit "Capture". This is video-only; if you want audio, you'd need to deal with that separately.

有关早期版本的Andr​​oid系统，你可能需要使用第三方库的ffmpeg一样来处理视频编码，这将显著降低帧速率。

For earlier versions of Android you'd need to use a 3rd-party library like ffmpeg to handle the video encoding, which will reduce your frame rate significantly.

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