GraphEdit Question

[taz]

I have a quick question on graphedit. Does this app simply show how audio and video are being converted or can it be used to control how another app converts files. If so, how? I see how to set up different filters, decoders, etc... just don't know how it controls the conversion (if it does).

Thanks,
Taz

[Ted the Penguin]

graphedit shows how a file is being rendered, I believe you can use graphedit to manually convert a file... by adding the encoder to the graph, but I am not sure of the specifics.

if you are wondering about modifying the graph GB-PVR is using... no, you cant modify it, GB-PVR just tells directshow to render a file, and that is it. if you want to use a different filter, then remove the unwanted filter, or play around with each filters settings.

do you have a specific problem?

[carpeVideo]

You can play files, encode them decode them or almost whatever you want depending upon the filter installed in your machine. Although graphedt is really a debugging tool. The graphRecorder plugin allows you to use a graph you have created that writes a file as a recording source in GBPVR. YMMV with 1.08

[ACTCMS]

I'm playing around with graphedit (certain edited videos don't play correctly) but I can't get help to open. I can add filters into the graph but can't figure out how to join pins - I can see how to break all connections, but not how to create them - anybody know?

[pastro]

From memory, start on a pin, click the left mouse(I think) button, hold the button down and go to the next pin and release.

[ACTCMS]

From memory, start on a pin, click the left mouse(I think) button, hold the button down and go to the next pin and release.

That's exactly what you do - AKA drag'n'drop - why didn't I think of that before? :o

Once I got that out of the way, I tried to build a graph to rip the audio from mpeg to mp3 - perhaps a bit over ambitious - I wonder what all those filters actually do:confused:

[blizard]

It is a bit complicated to explain in an easy way.

Hereis a link to a wiki taht explains the main feature of GraphEdit and DirectShow (look down on same page).

Microsoftsown explanation of this tool which is part of directshow tools from Microsoft. This will show you that this tool are connected to MS Visual Basic, it have much in common as you produce code in the background on how different pin are connected.

What you need to understand are that all file can be containers for more then just one data stream; one for audio, one for video and so on. As an example an AVI (Audio-video-interleave) is a file that can contain Xvid encoded files which is then mixed (interleaved) with sound (mp3) and a subtitle stream.

This container must be decoded by demuxing these streams into different pins to each filter which in turn process these and output these through hardware in that we call renderer. Those renderer is the link to how hardware should take these stream and use it for their with the driver for sound and video output.

If you encode it is almost the same way around, but then you need to re-mux those stream into a container (AVI, MKV or MP4 are some containers).

To see what is inside a container use GSpot. It will let you see what is inside a container and what kind of setting that used to encode each stream for audio and video.

[taz]

More specifically I am trying to convert video files for a Microsoft Zune. I am trying to convert vob files to wmv files using Microsoft Media Encoder. I can get it to work by I am looking at improving the quality a little bit. I found some notes on the web about using graphedit to specify certain filters, but am not sure how to force it to use certain filters. I can open up the vob file in graphedit and change the filters, but I don't think this tells the Media Encoder to use the chosen filter configuration.

Or is there better/simpler way to convert vob files to wmv?

Taz

[ACTCMS]

It is a bit complicated to explain in an easy way.

Thanks - your explanation confirms my understanding of directshow - I am using the tools you suggest, but I still need to find out more about them and I am still looking for a way to find out what most of the filters do. I can see a list of available filters, but I don't know enough to be able to substitute 'this' filter for 'that' filter to try to fix a problem.

[carpeVideo]

Sometimes it is easiest to right click a pin and hit render, it will generally choose the appropriate filters