android-MediaCodec在每个视频帧上记录带有时间戳的视频 [英] android - MediaCodec record video with timestamp on each video frame

问题描述

我需要在每个视频帧上记录带有时间戳的视频.我在 cts 中看到了一个示例，该示例使用InputSurace.java和OutputSurface.java连接Decoder和Encoder对视频文件进行转码.可以重用这两个android java类来实现时间戳录像机吗?

I need to record video with timestamp on each video frame. I see a example in cts which use InputSurace.java and OutputSurface.java to connect Decoder and Encoder to transcode video files. Is it possible to reuse these two android java class to implement a timestamp video recorder?

我尝试将OutputSurface用作Camera预览输出，并将InputSurface用作MediaCodec Encoder输入，但听起来只记录2或3帧，然后就永远挂在那里！

I try to use OutputSurface as Camera preview output and use InputSurface as MediaCodec Encoder input but sounds like only record 2 or 3 frames then it hang there forever!

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Take your time and explore this link to get an idea how to feed the Camera preview into a video file. Once you are confident about the mechanism, you should be able to feed the MediaCodec input surface with some kind of OpenGL magic to put extra graphics on the top of the Camera's preview. I would recommend to tweak the example code's drawExtra() as a start.

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