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[smoodilo]

I'm implementing the vb.net waveform drawing, and I came across a question:

Is there a way to make the loudest part of the mp3 to be 100% of the waveform?
I use MP3gain tot level all songs, but if I then draw the waveform, the peaklevels of the waveform go to only about half the height of the picturebox. I know this is accurate, but in this case I'd rather go for seeing better where the beats are.

Is this possible?

I have a workaround (I put the picturebox inside a panel, and make that panel lower than the actual picturebox height). But obviously this is bad practice.

Bernd?

[radio42]

The WaveForm has a "GainFactor" property which can be used to 'amplify' the graph.
In your case you might set this property to +2.0.

[smoodilo]

Thank you,

That's what I was searching for.

Another question:
Do you know where BassDShow_Channelsetwindow went in the namespace? I can't find it anymore.

[radio42]

It was once removed as far as I remember.
But it might have been re-added lately...however, it is a bit of a mess to implement the DSHOW API, as the develpoer changes that very often without much notice what really has changed.
So it might be, that I need to provide an update for the latest DSHOW version!

[smoodilo]

Hello Bernd,

Another question/ feature request about the markers:

If I set the markername to be on top, it's really on top of the line. So if I set the line to 1 (100%) the label is out of scope. I need to make the line smaller up to 70%  to see the name, but this means the line is very short on the bottom.

So my feature-request is: Instead of putting the label on top of the line, could you please change this to the 'top-right of the line'? (So the upperleft corner of the label is at the top of the line).

Is this possible?

[radio42]

I'll take a look!

[smodielo]

Thanks,

While experimenting I came to another bottleneck: It does not work for videofiles. So I can't combine it with BassDshow.

I have 2 solutions in mind:

1. Currently you read the needed data by scanning the file. Why don't you use the already created bass stream for that (ChannelGetData)? I assume this will work for any file, so video as well.

Another advantage of this would be that it would also work with downloading/streaming channels.


2. A workaround would be to have 2 files on the computer. The normal video file and a separate ultra-low-bitrate audio-only track from the video's audio. But of course this is not really a nice solution.

Any thoughts on this?

[radio42]

You can do this already (use an already prepared stream handle to do the WaveForm rendering)!
Simply use the "WaveForm.RenderStart(int decodingStream, bool background)" method overlaod - see the docs for details and examples.

[smodielo]

I tried this, but it doesn't work. What should the filename be if I use a streamhandle? Should I even pass a filename if I use an already created stream?

------------
Private Sub SetupWaveForm(ByVal filename As String, ByVal BassStream As Integer)
        wf = New WaveForm(filename, New WAVEFORMPROC(AddressOf WFCallback), Me)
        wf.RenderStart(BassStream, True, False)
        wf.SyncPlayback(BassStream)
End Sub
------------

[radio42]

The filename isn't important in such case, e.g. you might use the constructor which doesn't take any filename resp. use "String.Empty".
Note, that your prepared "BassStream" MUST be a decoding one, i.e. the BASS_STREAM_DECODE flag must have been specified with your stream creation call.
Can you please show how you created your "BassStream"...

[smodielo]

BassStream = BASS_StreamCreateFile(SongTmpPathPlayer1, 0, 0, OUTPUT)

(Where output are the selected speakers).

If I read the docs it will not work for me since e.g. the speakerflags do not work on a decoding channel.

So I end up creating 2 channels again. One normal for playing, and one decoding for retrieving the wavedata.

[radio42]

Yes.
Note, that the WaveForm class needs to call BASS_ChannelGetData internally to get the channels sample data to render it.
When using that on a 'playback' channel it would 'stead' that data from it.

[smodielo]

Yes.
Note, that the WaveForm class needs to call BASS_ChannelGetData internally to get the channels sample data to render it.
When using that on a 'playback' channel it would 'steal' that data from it.

OK, I understand. Thanks.

[jaeminem]

Thanks