video time question...
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Here's where to talk about preamps, cables, microphones, monitors, etc.
video time question...
Hello.
I've sped a song up using Quicktime in order to create a neat slow motion effect in Final Cut Pro.
I set the speed of the song to 1.5x in Quicktime and filmed the video in normal time just playing along to the faster track.
However, if I set my video to play at 50% speed in FCP I'm still out of sync with the video.
What is the math here? I know it's nothing difficult but for whatever reason it's not behaving the way I'd like things to.
I just need to know what speed to set the video to in order to get the most sync possible.
Thank you for any advice.
I've sped a song up using Quicktime in order to create a neat slow motion effect in Final Cut Pro.
I set the speed of the song to 1.5x in Quicktime and filmed the video in normal time just playing along to the faster track.
However, if I set my video to play at 50% speed in FCP I'm still out of sync with the video.
What is the math here? I know it's nothing difficult but for whatever reason it's not behaving the way I'd like things to.
I just need to know what speed to set the video to in order to get the most sync possible.
Thank you for any advice.
- Kurt Cowling
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Re: video time question...
Speeding up from 100% to 150% is a 50% increase, but slowing 150 back down to 100 is only a 33% decrease. Try setting to 67%.
DP 11.1, Monterey, 2021 MacBook Pro M1-Max, 2017 iMac Retina 5K 27-inch, Omnisphere 2, Trilian, Stylus RMX, EZ Drummer 2, MachFive 3.11, Real Guitar2, Real Strat, Sample Modeling trumpet, saxes, trombone, Fr Horn/Tuba. Audio Modeling clarinets, double reeds, flutes, strings, Kontakt 6, Flux Pure Limiter 3, PSP Vintage Warmer, PSP MixPack, PSP StereoPack, PSP Impressor, Altiverb 7, Izotope RX8 Standard, Yamaha S-90ES, Yamaha MOXF-8, Yamaha MX60, Sibelius subscription, Adobe CC and Motion 5.
- Kurt Cowling
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- Joined: Mon Oct 18, 2004 10:01 pm
- Primary DAW OS: MacOS
- Location: Milwaukee, WI
Re: video time question...
I should have said “a 1/3 decrease”. Set as close to 2/3 (66.6666667%) as your video app allows.
DP 11.1, Monterey, 2021 MacBook Pro M1-Max, 2017 iMac Retina 5K 27-inch, Omnisphere 2, Trilian, Stylus RMX, EZ Drummer 2, MachFive 3.11, Real Guitar2, Real Strat, Sample Modeling trumpet, saxes, trombone, Fr Horn/Tuba. Audio Modeling clarinets, double reeds, flutes, strings, Kontakt 6, Flux Pure Limiter 3, PSP Vintage Warmer, PSP MixPack, PSP StereoPack, PSP Impressor, Altiverb 7, Izotope RX8 Standard, Yamaha S-90ES, Yamaha MOXF-8, Yamaha MX60, Sibelius subscription, Adobe CC and Motion 5.
- stubbsonic
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Re: video time question...
Agreed.
Similarly you could increase to 133.33..% then slow down by 75%
If you needed more precision with the speedup or slowdown, you could use DP's pitch/time stuff.
Audacity is freeware and does pitch and time pretty well.
And my go-to is IRCAM TS
Similarly you could increase to 133.33..% then slow down by 75%
If you needed more precision with the speedup or slowdown, you could use DP's pitch/time stuff.
Audacity is freeware and does pitch and time pretty well.
And my go-to is IRCAM TS
M1 MBP; OS 12, FF800, DP 11.3, Kontakt 7, Reaktor 6, PC3K7, K2661S, iPad6, Godin XTSA, Two Ibanez 5 string basses (1 fretted, 1 fretless), FM3, SY-1000, etc.
http://www.jonstubbsmusic.com
http://www.jonstubbsmusic.com
- mikehalloran
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Re: video time question...
DP uses ZTX which is really good. I prefer using ZTX inside TwistedWave — same engine but far less convoluted to use when doing T/S math to match video.stubbsonic wrote: ↑Sat Jan 01, 2022 9:54 am Agreed.
Similarly you could increase to 133.33..% then slow down by 75%
If you needed more precision with the speedup or slowdown, you could use DP's pitch/time stuff.
Audacity is freeware and does pitch and time pretty well.
And my go-to is IRCAM TS
I also have IRCAM TS. It and ZTX do not sound the same. Both are great but sometimes I prefer one over the other.
DP 11.31; 828mkII FW, micro lite, M4, MTP/AV USB Firmware 2.0.1
2023 Mac Studio M2 8TB, 192GB RAM, OS Sonoma 14.5 b4, USB4 8TB external, M-Audio AIR 192|14, Mackie ProFxv3 6/10/12; 2012 MBPs Catalina, Mojave
IK-NI-Izotope-PSP-Garritan-Antares, LogicPro X, Finale 27.4, Dorico 5.2, Notion 6, Overture 5, TwistedWave, DSP-Q 5, SmartScore64 Pro, Toast 20 Pro
2023 Mac Studio M2 8TB, 192GB RAM, OS Sonoma 14.5 b4, USB4 8TB external, M-Audio AIR 192|14, Mackie ProFxv3 6/10/12; 2012 MBPs Catalina, Mojave
IK-NI-Izotope-PSP-Garritan-Antares, LogicPro X, Finale 27.4, Dorico 5.2, Notion 6, Overture 5, TwistedWave, DSP-Q 5, SmartScore64 Pro, Toast 20 Pro
Re: video time question...
Thanks for the responses guys!
I realized that most of my problem was bad pantomiming to the original track. (Hard to appear to play correctly at such a speed!)
Either way, what is the breakdown of the math?
I get what the deal is but not 100% intuitively.
Wouldn't 150% be 50% faster than normal?
Thanks again.
I realized that most of my problem was bad pantomiming to the original track. (Hard to appear to play correctly at such a speed!)
Either way, what is the breakdown of the math?
I get what the deal is but not 100% intuitively.
Wouldn't 150% be 50% faster than normal?
Thanks again.
- stubbsonic
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- Joined: Fri Dec 22, 2006 12:56 pm
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Re: video time question...
Let's use a simple example. Let's say the current speed is 2 (with an arbitrary unit). So increase the speed by 150%. Now the speed is 3.
Your new speed as now the new value for what is 100%. That old value of 2 as "100%" is no longer valid.
So now if you went to reduce that new speed back to it's original speed, you can't just subtract 50%-- because obviously that would be half of 3 (1.5).
2 is no longer 100%, it is now 3 that is 100%. So to get back to a speed of 2. So what would be the formula to get back?
M1 MBP; OS 12, FF800, DP 11.3, Kontakt 7, Reaktor 6, PC3K7, K2661S, iPad6, Godin XTSA, Two Ibanez 5 string basses (1 fretted, 1 fretless), FM3, SY-1000, etc.
http://www.jonstubbsmusic.com
http://www.jonstubbsmusic.com
- Kurt Cowling
- Posts: 385
- Joined: Mon Oct 18, 2004 10:01 pm
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- Location: Milwaukee, WI
Re: video time question...
Hint... the answer was posted by me earlier in the thread.So what would be the formula to get back?
DP 11.1, Monterey, 2021 MacBook Pro M1-Max, 2017 iMac Retina 5K 27-inch, Omnisphere 2, Trilian, Stylus RMX, EZ Drummer 2, MachFive 3.11, Real Guitar2, Real Strat, Sample Modeling trumpet, saxes, trombone, Fr Horn/Tuba. Audio Modeling clarinets, double reeds, flutes, strings, Kontakt 6, Flux Pure Limiter 3, PSP Vintage Warmer, PSP MixPack, PSP StereoPack, PSP Impressor, Altiverb 7, Izotope RX8 Standard, Yamaha S-90ES, Yamaha MOXF-8, Yamaha MX60, Sibelius subscription, Adobe CC and Motion 5.
- stubbsonic
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Re: video time question...
Yes, we both arrived at the answer. The reason I asked a question about the formula was to create a little step-by-step process.Kurt Cowling wrote: ↑Mon Jan 03, 2022 1:30 pmHint... the answer was posted by me earlier in the thread.So what would be the formula to get back?
If a person had a tempo of X (in BPM), and they wanted to increase the tempo by a factor of Y (a percentage, perhaps), resulting in new tempo Z, then they want to revert tempo Z back to tempo X again, say by a factor of W (another percentage)-- is there a relationship between factors Y and W? Is there an elegant way to show all the ratios/relationships? My math skills are not great, but it's not for lack of trying.
M1 MBP; OS 12, FF800, DP 11.3, Kontakt 7, Reaktor 6, PC3K7, K2661S, iPad6, Godin XTSA, Two Ibanez 5 string basses (1 fretted, 1 fretless), FM3, SY-1000, etc.
http://www.jonstubbsmusic.com
http://www.jonstubbsmusic.com