[vlc] Re: Reports on 5.1 audio with VLC-win32 ?

[Sebastian P. Goetze]

On 22 May 2003 at 18:54, Gildas Bazin wrote:

>On Thursday 22 May 2003 14:53, Sebastian P. Goetze wrote:
>...
>> - in 2+2 mode the sound is off to the left front / right back (too loud 
>>   there)
>> -> I suspect the 'remixing' of channels has some problems...
>> 

>Yes, I guess it is the problem. I'll check this.

>> I compared it to BSPlayer with the AC3Filter wich is doing a fine job 
>> displaying all 6 channels and very flexible in setting it up on different 
>> systems.

If you have access to a win32 system, check out the AC3Filter. Implementing the idea of 
an Input/Output Matrix you could 'remix' to all sorts of different Speaker configurations. 
You could even use it for plain stereo (treat it as AC3 with just the (front) left and right 
channels) and remix it to the back speakers too. The 'reverse stereo' could easily be 
realized with that, too...

...
>> Is there any chance that you can use the AC3Filter (if it is installed) 
>> instead of VLCs internal handling of AC3 ? I didn't find it in the plugin 
>> or filter lists...
>> 
>
>No. At least personnaly I don't plan to work on this as it would only work 
>with the win32 version of vlc.

Check out http://ac3filter.sourceforge.net/ . It's Opensource, and GNU. Written in C++, 
and there's interesting related projects: MatrixMixer and LibA52 (which you're using 
already...)

It should be easy to make it cross-platform, or at least get some ideas...
(The MatrixMixer, maybe ?)

>> - Another Thing: Audio desynchronisation compensation (still) doesn't seem 
>> to work. I tried (de-)synchronizing the audio of a perfectly fine movie, 
>> but it was still in synch... AFAIK it doesn't do a thing...
>> 
>
>Thanks for reminding me. I just fixed it in the cvs.

Good... :-)

>> - On that matter: in Plugins/Video Filter/Adjust I tried setting 
>> Brightness, Saturation, Contrast, all without any perceivable results...
>> Am I doing something wrong ??
>>
>
>You need to enable the "adjust" filter in the preferences panel in the 
>"video" section.

Tricky... 'Enable' = 'choose'.  Only 1 filter at a time, correct ?
Suggestion: Give them the same name and sequence in the video section as in the 
Plugins/Video Filter  Section.

Of course I tried it, but: You only seem to be able to select Integer values!
Now a brightness or a contrast of 2 (instead of 1) was WAY too much. Messed my dark 
video up completely.

Suggestions: slider controls (e.g. in addition), float values that work (or a bigger integer 
range, e.g. 100=normal, 0=black, 200=white or something like that), Instant Feedback 
(Sample Frame (e.g. the current one) updated with the values you're about to 'save')

>Thanks for you report, that's really helpful.

You're very welcome... :-)

-- 
Sebastian Goetze
SPGoetze at Nikocity.de
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