why can not work when set CreateFromStream?

Question

mc 7,186

MediaCapture capture;
capture.StartRecordToStreamAsync(profile,stream);

and I use this stream to create MediaSource do not work.

myVideo=MediaSource.CreateFromStream(stream);

the video do not play.

unless I run this:

capture.StopCaptureAsync();

why?

how to play the video when I am capturing to the stream?

Junjie Zhu - MSFT 21,746 Reputation points

2023-11-17T08:01:27.0533333+00:00

Hi @mc Welcome to Microsoft Q&A!

I noticed that your question has two tags, could you please tell us what is your project? UWP or WinUI3?

Thank you.
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This comment has been deleted due to a violation of our Code of Conduct. The comment was manually reported or identified through automated detection before action was taken. Please refer to our Code of Conduct for more information.
mc 7,186 Reputation points

2023-11-17T08:10:46.1733333+00:00

now I found the problem.

it is the data I read is not right.

the stream I get from StartRecordToStreamAsync and I will use GetInputStreamAt(offset).AsStreamForRead().Read to read to buffer and then write the buffer to the new stream.

but I find that the buffer I read is not equal to the stream I get from StartRecordToStreamAsync

Your answer

Junjie Zhu - MSFT 21,746 Reputation points

2023-11-17T08:01:27.0533333+00:00

Hi @mc Welcome to Microsoft Q&A!

I noticed that your question has two tags, could you please tell us what is your project? UWP or WinUI3?

Thank you.
Deleted

This comment has been deleted due to a violation of our Code of Conduct. The comment was manually reported or identified through automated detection before action was taken. Please refer to our Code of Conduct for more information.
mc 7,186 Reputation points

2023-11-17T08:10:46.1733333+00:00

now I found the problem.

it is the data I read is not right.

the stream I get from StartRecordToStreamAsync and I will use GetInputStreamAt(offset).AsStreamForRead().Read to read to buffer and then write the buffer to the new stream.

but I find that the buffer I read is not equal to the stream I get from StartRecordToStreamAsync