如何获得一个帧的DTS [英] How to get DTS of a frame

问题描述

我正在使用H.264 MFT将自己的编码和多路复用编码帧转换为MP4文件。

我可以使用  IMFSample-> GetSampleTime（& iSampleTime），

来获取时间戳（演示时间）但是为了正确地复用帧我需要知道帧的DTS（它可以与PTS不同。

有人能告诉我如何从IMFSample中获取DTS？ 

谢谢

解决方案

IMFSample :: GetSampleTime返回QPC / DTS，除非你在传递给接收器后得到它。然后它包含基于第一个样本的GetSampleTime计算的呈现时间：

[source] - >具有QPC / DTS的IMFSample - > <&的MTF GT; - >具有QPC / DTS的IMFSample - > [Sink] - >带有PTS的IMFSample。

编辑：

您也可以尝试使用
MFSampleExtension_DeviceTimestamp 属性。

Hi,

I'm using H.264 MFT to do encoding and mux encoded frames myself into a MP4 file.

I could get the timestamp (presentation time) using IMFSample->GetSampleTime(&iSampleTime),

But to mux frames correctly I need to know DTS of the frames (it could be different from PTS).

Could anyone tell me how can I get DTS from a IMFSample? 

Thanks

解决方案

IMFSample::GetSampleTime returns QPC/DTS, unless you are getting it after it's been passed to the sink. Then it contains the presentation time that is calculated based on the first sample's GetSampleTime:

[source] -> IMFSample with QPC/DTS -> <MTFs> -> IMFSample with QPC/DTS -> [Sink] -> IMFSample with PTS.

Edited:

You can also try and use MFSampleExtension_DeviceTimestamp attribute.

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