将NAL头添加到原始H264流 [英] Adding NAL headers to raw H264 stream

问题描述

为了将NAL头添加到原始H264流中，我需要做什么？最终，我想拍摄视频文件并将其与音频文件复合。

2相关问题：

1。）我看过这篇文章： H. 264转换与FFmpeg（从RTP流）

然而，当我看每帧的前两个字节，我看到0和0对于我录制的任何画面，我们都没有提及任何关于NAL内容的内容。

我在正确的地方看吗？是否还有另一种方法可以在NAL头文件中创建和写入H264流？

2。）另外，NAl头是否包含任何时间信息？我怎样才能将它与音频同步？

谢谢！

解决方案

当你说NAL头文件时，我不知道你的意思。但是，您的信息流很可能是附件格式。在AnnexB格式中，每个NALU都有一个起始码。通常它是一个3（0x000001）或4（0x00000001）字节的起始码。只需跳过这些字节即可。

In order to add NAL headers to a raw H264 stream, what do I need to do? Ultimately, I want to take the video file and mux it with an audio file.

2 related questions:

1.) I've looked at this post: H.264 conversion with FFmpeg (from a RTP stream)

However, when I look at the first two bytes of each frame, I'm seeing 0 and 0 for any frame I record, which doesn't say anything about the NAL contents.

Am I looking at the right place? Is there another way I can create and write in NAL headers to a H264 stream?

2.) Also, does the NAl header contain any timing information? How could I sync it with the audio?

Thanks!

解决方案

I have no idea what you mean when you say NAL headers. However, your stream is most likely in annexb format. In annexB format each NALU is preceded with a start code. Usually it is a 3 (0x000001) or 4 (0x00000001) byte startcode. Simply skip past these bytes.

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