Hi all,

I would like to obtain Program Guide data from digital TV transportation
stream, and would appreciate some pointers. We have a program that does
digital TV tuning, and we would like to implement a Guide Store.

According to DirectShow documentation, there are two recommended ways of
obtaining such info:

1. By getting the information from the BDA MPEG-2 Transport Information
Filter (TIF)
2. By getting section data from the MPEG-2 Sections and Tables filter.

Approach 1 seems to be very straight forward. The problem is I can not get
it to work.

I am supposed to implement IGuideDataEvent interface and receive
notifications from the TIF before using IGuideData interface to retrieve the
Program info. However, the ProgramChanged event never comes during the
running of the graph. If I try to call any IGuideData methods such as
GetGuideProgramIDs(), I get an error code E_NOTIMPL.

Am I missing something obvious? The only event that I can receive using the
IGuideDataEvent is when running the application with DVB-T device, in which
case IGuideDataEvent::ServiceChanged() event does come. No event comes for
ATSC devices.

Is it really like the returned error code E_NOTIMPL implies - IGuideData is
not implemented for ATSC devices? Why?

I have not tried the second approach suggested by the documentation. I know
it is more complicated. I have had some experience using the PSI Tables as I
used it for getting channels information from VCT table (ATSC_VCT_PID).

Can someone tell me that I need to do (for example which PID and TID use)
to retrieve programming guide data?

Thanks for any help.

Hi James,

I haven't seen any reference case on this so far. However a workable
approach to retrieve the data should be using methods under IMpeg2Data
interface. The following blog article sheds some hints on this.

MPEG-2 Sections and Tables Byte Order
http://www.rikware.com/post/MPEG-2-S...yte-Order.aspx

IMpeg2Data Interface
http://msdn.microsoft.com/en-us/libr...05(VS.85).aspx

Thanks.

Sincerely,

WenJun Zhang

Microsoft Online Community Support

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Thanks WenJun.

I was hoping method #1 as documented by Microsoft would work. It sure looks
much simpler!

I guess I will have to explore method #2, i.e. IMpeg2Data on Sections and
Table filter.


""WenJun Zhang[msft]"" wrote:
[..]

Hi James,

I will go ahread to ping our internal directshow group for more information
on the 1st approach. If there is any update, I will post here to let you
know.

Thanks and have a nice day.

Sincerely,

WenJun Zhang

Microsoft Online Community Support

Delighting our customers is our #1 priority. We welcome your comments and
suggestions about how we can improve the support we provide to you. Please
feel free to let my manager know what you think of the level of service
provided. You can send feedback directly to my manager at:
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Hi James,

I've confirmed most of the methods aren't currently supported on the
IGuideDataEvent interface as per:

IGuideDataEvent Interface
http://msdn.microsoft.com/en-us/libr...16(VS.85).aspx.

So the 2nd way should be the only path for you to choose.

Please feel free to let me know if you have any further question on this.

Have a nice weekend.

Sincerely,

WenJun Zhang

Microsoft Online Community Support

Delighting our customers is our #1 priority. We welcome your comments and
suggestions about how we can improve the support we provide to you. Please
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Hi James,

I wonder if you still have any further questions on this post?

Thanks and have a nice day.

Sincerely,

WenJun Zhang

Microsoft Online Community Support

Delighting our customers is our #1 priority. We welcome your comments and
suggestions about how we can improve the support we provide to you. Please
feel free to let my manager know what you think of the level of service
provided. You can send feedback directly to my manager at:
msdnmg.

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most efficient resolution. The offering is not appropriate for situations
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