Re: [LAD] Replaygain for video?

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To: linux-audio-dev <linux-audio-dev@...>
Date: Saturday, December 10, 2011 - 12:10 pm

Excerpts from Adrian Knoth's message of 2011-12-10 11:38:03 +0100:

Anyway, thanks for helping :)

> Maybe you need to motivate your wish for "replaygain for audio tracks in

Counter argument:
most videos these days aren't real movies but amateur productions
off youtube or whatnot. Admittedly most people watch those
in-browser using flash. Either way, I would argue that
professionally produced movies are a minority these days.

> I'm only quoting Bob Katz on this, I've never mastered a Hollywood

Counter argument:
If normalization would be sufficient, there wouldn't have been a
need for replaygain in the first place. Explanation on
http://www.replaygain.org/.

>

Right, this should do. Is there an API for that? Either way, I think the
calculation could be done on the dumped audio and the dumped audio file
could be deleted immediately afterwards, provided it's possibly to add
tags without re-encoding or re-muxing.

> > After that, the scanning process should work as with any audio file.

Ah, I didn't think of adding metadata to the audio itself, another
possibility. However, adding it to the container would probably be more
universal.

> > Playback Video players need to be aware of those tags, read the

Yes, this is the major issue, an uphill battle. Replaygain fights it
since ten years. I realize that the result of the project would not be a
practical solution but rather a proof of concept or a first step.

> That is why normalizing in the player's output chain (see (2) above) or

Alex Stone, I guess :)
I discussed connection management with him a long while ago, the idea to
write something that can handle hundreds of ports well stems from there.

> > - A simple but hopefully sane mplayer GUI

I mostly use smplayer, but I'm not exactly happy with it although it's
pretty much the official frontend at the moment.
Here's an audio related bug report I filed more than a year ago that got
no response:
http://sourceforge.net/tracker/?func=detail&aid=3052419&group_id=185512&...
Even more annoying is that the volume suddenly increases after a while,
apparently once a certain threshold is reached.
I want to write something that doesn't have bugs like those and that has
sane file and playlist management.

> In any case:

Many of those are dead links and even the reasonably popular frontends
are rather bad (gnome-mplayer, which doesn't depend on gnome and has
lots of really stupid interface decisions that make it unusable).
But yes, chances are I'd just add another dead link.

> > Another problem I might have is that most students in the course are

That's a rather good idea, thanks.
If you have a good idea, please tell me. I'll have to find a team on
monday and it might help to have some good proposals.

Regards,
Philipp

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Messages in current thread:
[LAD] Replaygain for video?, Philipp, (Fri Dec 9, 8:20 pm)
Re: [LAD] Replaygain for video?, Robin Gareus, (Sat Dec 10, 2:26 pm)
Re: [LAD] Replaygain for video?, Philipp Überbacher, (Sat Dec 10, 10:04 pm)
Re: [LAD] Replaygain for video?, Robin Gareus, (Sun Dec 11, 11:49 am)
Re: [LAD] Replaygain for video?, Fons Adriaensen, (Sun Dec 11, 12:19 pm)
Re: [LAD] Replaygain for video?, Robin Gareus, (Sun Dec 11, 1:28 pm)
Re: [LAD] Replaygain for video?, Philipp Überbacher, (Sat Dec 24, 12:11 pm)
Re: [LAD] Replaygain for video?, Jörn Nettingsmeier, (Sat Dec 10, 12:04 pm)
Re: [LAD] Replaygain for video?, Adrian Knoth, (Sat Dec 10, 10:38 am)
Re: [LAD] Replaygain for video?, Philipp Überbacher, (Sat Dec 10, 12:10 pm)
Re: [LAD] Replaygain for video?, Adrian Knoth, (Sat Dec 10, 2:02 pm)
Re: [LAD] Replaygain for video?, Philipp Überbacher, (Sat Dec 10, 8:42 pm)
Re: [LAD] Replaygain for video?, Fons Adriaensen, (Sat Dec 10, 2:22 pm)