I am having trouble to get ffmpeg write to a named pipe in windows. I know it's
possible to write to a anonymous pipe with the command:
ffmpeg.exe -vsync passthrough -f dshow -i video="AVerMedia SD 1
Capture":audio="AVerMedia SD Audio Cap 1 (AVerM" -vcodec rawvideo -f matroska -
And I can read the pipe with ffplay.exe -i -
But is it possible to write to a named pipe?
I tried to by creating a named pipe with the following c# code:
NamedPipeServerStream p_from_ffmpeg = new NamedPipeServerStream("tmp_pipe1",
PipeDirection.In,
1,
PipeTransmissionMode.Byte,
PipeOptions.WriteThrough,
1000, 1000);
I checked if the pipe really exist with the pipelist.exe from
https://technet.microsoft.com/en-us/sysinternals/dd581625.aspx.
Then I tried to write the output data from ffmpeg to the pipe by using the
following command:
ffmpeg.exe -vsync passthrough -f dshow -i video="AVerMedia SD 1
Capture":audio="AVerMedia SD Audio Cap 1 (AVerM" -vcodec rawvideo -f matroska
tmp_pipe1
and the following:
ffmpeg.exe -vsync passthrough -f dshow -i video="AVerMedia SD 1
Capture":audio="AVerMedia SD Audio Cap 1 (AVerM" -vcodec rawvideo -f matroska
pipe:1 > tmp_pipe1
Both commands are adding a file named "tmp_pipe1" to the directory of the
ffmpeg executable while the anonymous pipe isn't adding a file and is working
perfectly for me. The only problem is that I would like to deinterlace, record
with a codec and render/view more than one channel. So I thought to run one
instance of ffmpeg and pipe the outputs to multiple instances of ffplay. I
don't know whether it's possible to write the output of ffmpeg to a named pipe
in windows. Does someone has an answer?
Regards,
Robin
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