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Show HN: Entire concerts algorithmically "reconstructed" from YouTube videos

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Re: Show HN: Entire concerts algorithmically "reconstructed" from YouTube videos

#111

Post by pbhjpbhj »

VladRussian wrote: post #66
antimatter15 wrote: post #13

Earlier quoted context omitted.

Courts ruling on fair use are supposed to take into account "the amount and substantiality of the portion used in relation to the copyrighted work as a whole". Automated copyright detection schemes in YouTube may try to do some semblance of fair use by allowing snippets of copyrighted content under 30 seconds.

just a sidenote - if bittorrent software ensure that no peer-to-peer interaction exceeds 30 sec. for any given title, would MPAA/RIAA/etc... still be able to claim "illegal dowload"?

YouTube are just doing a first pass filter. They're not saying that 30s of a work is legally allowed.

Re: Show HN: Entire concerts algorithmically "reconstructed" from YouTube videos

#112

Post by shinratdr »

pbhjpbhj wrote: post #110
brettwelch wrote: post #34

Earlier quoted context omitted.

Thanks! - I'm no lawyer, but the advice we've received is that we're good on the legal side. - You're on the money re: audio. It's miles better than it was 1 month ago, but we're still not 100% yet. - There is a human curation step (~5% of the process), but that is mostly for removing really crappy videos. Searching/Synching/Sequencing is automatic. - I dunno about next step(!), but i agree the idea is super interest…

This certainly looks like a tortuous infringement in the UK (and I'd posit Europe). I didn't get a "only in the US" notice on YouTube though. I can't see how this is possibly "fair use" - it's the complete work of music and the visual design of the set, choreography and show that is being reproduced in full in a commercial way. Unless the uploaders bought a license with their ticket to reproduce and distribute online…

It's an embed. Supposed rights holders can easily contact Youtube with a DMCA request and they will take it down.

What is the problem exactly?

Re: Show HN: Entire concerts algorithmically "reconstructed" from YouTube videos

#113

Post by javanix »

seats wrote: post #108
brettwelch wrote: post #34

Earlier quoted context omitted.

Thanks! - I'm no lawyer, but the advice we've received is that we're good on the legal side. - You're on the money re: audio. It's miles better than it was 1 month ago, but we're still not 100% yet. - There is a human curation step (~5% of the process), but that is mostly for removing really crappy videos. Searching/Synching/Sequencing is automatic. - I dunno about next step(!), but i agree the idea is super interest…

I wonder how possible it would be both technically and legally to use the audio from the various angles as inputs into an audio processing step where you distill just the true music audio and clean it up. Ideally you'd have one 'cleaned' version of the audio playing and switching views just switches video. This may be more legally grey than just piping through audio since you are actually producing a derivative work…

It would probably be technically "possible" but I doubt that you'd end up with anything that sounds listenable.

The only bootleg audio that usually sounds decent are soundboard recordings, and when you find audience tapes spliced in with them the difference is immediately noticable.

Re: Show HN: Entire concerts algorithmically "reconstructed" from YouTube videos

#116

Post by baddox »

JonnieCache wrote: post #86
baddox wrote: post #54

Earlier quoted context omitted.

The idea I'm talking about should provide a single consistent audio signal. I know nothing about audio processing, but it seems like it should be possible to take multiple bad audio signals and combine them into one signal that's better than any constituent audio source. Perhaps one audio source captured low frequencies well, while another captured higher frequencies better.

>take multiple bad audio signals and combine them into one signal that's better The problem eventually comes down to the fact that "better" is subjective. We're in the murky realm of art here. Should your algorithm keep that fret noise or the squeaking of a vocalist's intake of breath? Are they "noise," or are they part of the performance? >I know nothing about audio processing Not wishing to be rude, but this much i…

> Not wishing to be rude, but this much is very evident. Recording engineers position their microphones with millimetre precision in order to combat phase issues, and that is in an ideal studio scenario. Doing what you suggest is basically impossible.

Actually, that much I know, because I've done some amateur home recording. I know that, for example, when you mic a snare drum with two microphones that are pointed at each other, you have to put a phase inverter on one microphone. I also know my way around the basic processors for audio production (compressor, limiter, EQ, etc.).

What I don't know much about is the undoubtedly more advanced techniques which may or may not exist that could realize the idea I'm talking about. The best idea I can come up with is, if you had one audio source that captured the dynamics of a concert (perhaps from a phone that was far away from the house speakers), and another audio source that captured a clearer yet "smashed" sound (perhaps from a phone closer to the house speakers), perhaps you could apply a compressor to the second source that was keyed on the dynamics of the first. Again, I might be full of crap here.

Re: Show HN: Entire concerts algorithmically "reconstructed" from YouTube videos

#117

Post by gridspy »

javanix wrote: post #113
seats wrote: post #108

Earlier quoted context omitted.

I wonder how possible it would be both technically and legally to use the audio from the various angles as inputs into an audio processing step where you distill just the true music audio and clean it up. Ideally you'd have one 'cleaned' version of the audio playing and switching views just switches video. This may be more legally grey than just piping through audio since you are actually producing a derivative work…

It would probably be technically "possible" but I doubt that you'd end up with anything that sounds listenable. The only bootleg audio that usually sounds decent are soundboard recordings, and when you find audience tapes spliced in with them the difference is immediately noticable.

Perhaps bands who want to be popular on this site could provide concert recordings to splice in.

Re: Show HN: Entire concerts algorithmically "reconstructed" from YouTube videos

#118

Post by JonnieCache »

6ren wrote: post #90
JonnieCache wrote: post #87

Earlier quoted context omitted.

>at the same time The thing is, sound doesn't travel all that fast when you consider the wavelengths of vocal-range soundwaves. Those spikes are not going to arrive at the same time on the different phones. As ever with DSP, phase problems will be the ruin of you.

nice point, but they'd synchronize with an offset. I doubt absolute time would be used to synchronize the videos anyway; they'd be matched by content. Or do you mean that different frequencies will travel at different speeds, enough to make (e.g.) high and low frequencies arrive at different times? Whoa, apparently it does ( http://en.wikipedia.org/wiki/Speed_of_sound#Effect_of_freque... ) but seems to be a small eff…

When setting up a big sound system, you have to delay the bassbins by up to 10ms, depending on the size of the cabinets.

Also, how do you calculate your offset? Consider that it is constantly changing.

Re: Show HN: Entire concerts algorithmically "reconstructed" from YouTube videos

#119

Post by BrandonM »

chartley wrote: post #43
autrefoius wrote: post #35

Earlier quoted context omitted.

The error I'm receiving on Firefox Aurora 10.0a2 (2011-11-27) is: VKLog is not defined http://switchcam.com/assets/js/utils/facebook.js?ver=2011112... Line 81 VKLog.dlog("checkSessionStatus()"); It does seem to work with Adblock disabled, so I'd guess a subscription is blocking something essential.

Interesting, thanks for poking around! I don't think we use anything dodgy (except maybe Facebook libraries) but I'll see if I can set up that configuration and debug it. Really appreciate you taking the time to write this up. Cheers, Chris

I'm having the same problem. I think it's a bad idea to use Facebook libraries for critical functionality. A lot of people (myself included) block Facebook resources from loading on external sites to decrease their ability to track user activity.

Re: Show HN: Entire concerts algorithmically "reconstructed" from YouTube videos

#120

Post by hyperbovine »

exDM69 wrote: post #100
andrewfelix wrote: post #50

Sweet execution. Finally a use for all those dickheads who hold up their phones in the middle of a live performance.

Yeah, now that you can't see anything but camera phones while you're actually at the concert, you can watch it from youtube when you get home. Thankfully this isn't too much of a problem at heavy metal gigs. No-one wants to take their smartphone to the moshpit :D

The solution must be to institute moshing at all live shows, then. Lilith Fair, here I come.
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