Re: Insert SmartTee AND control preview and capture independently
- From: Erwin Bellon <erwin . bellon at uz . leuven>
- Date: Tue, 24 May 2005 09:23:18 -0700
"Alessandro Angeli [MVP::DigitalMedia]" wrote:
> The CaptureGraphBuilder should insert a SmartTee. Do you
> insert a SmartTee as well or an InfTee?
CoCreateInstance(CLSID_SmartTee,...)
> As you know, ControlStream() simple calls the methods of
> IAMStreamControl on the output pins of the capture filters
> or the SmartTee....
Your remark suggested to me that I may have made things overly difficult. I
first invoked ControlStream to stop everything (in the idea that in this way
possible audio and such would be handled for me) and then I selectively
wanted to re-start some pins. Doing so I very probably made stupid mistakes.
When I just stop/start the capture pin of my smart tee explicitly, the stuff
seems to work better (I do not yet get EC_STREAM_CONTROL... events but still
have to look into that).
> ... As TMH suggested, using the GMFBridge will make this a lot easier.
I only read Geraint's paper on that and did not yet try. Anyhow, it gave me
a bad feeling that I did not get the "plain" ICaptureGraphBuilders methods to
work, as that indicates I do not have sufficient understanding :-(
Many thanks to you and TMH for your reaction (and for contributing to the
vaste body of information available in this group).
Maybe, only if you don't mind, a few minor questions...
- I feel inclined to still invoke ControlStream for audio, just so I do
not have to keep track of those filters (did not test, though). It is
legal/moral to StopAt and StartAt different parts of the graph in
different instructions while the graph is running?
- Isn't it at all necessary to control downstream pins? The ControlStream
documentation says that this method does so...
- Does it make sense to first invoke methods such as RenderStream
or ControlStream on MediaType_Video first and then on
...Interleaved in an attempt to make the code general general, or
will it in practice be necessary to support interleaved media in a
totally different way anyhow?
.
- References:
- Insert SmartTee AND control preview and capture independently ?
- From: Erwin Bellon
- Re: Insert SmartTee AND control preview and capture independently ?
- From: Alessandro Angeli [MVP::DigitalMedia]
- Insert SmartTee AND control preview and capture independently ?
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