No scratch video and recorded at 60 fps 25% speed reduction

daniel-s7451 wrote on 3/6/2019, 8:45 PM

Any ideas on how to rescue these interviews. Good audio, good Video (but recorded too slow) No scratch video to sync using Plural Eyes.

.DanDevice name    Dan-PC
Processor    Intel(R) Core(TM) i7-2600K CPU @ 3.40GHz   3.40 GHz
Installed RAM    16.0 GB
Device ID    6A5833A6-196E-4B0E-B256-26DF52603A31
Product ID    00330-80000-00000-AA020
System type    64-bit operating system, x64-based processor
Pen and touch    No pen or touch input is available for this display

Edition    Windows 10 Pro
Version    21H1
Installed on    ‎9/‎22/‎2021
OS build    19043.1237
Experience    Windows Feature Experience Pack 120.2212.3530.0
 

Comments

rraud wrote on 3/7/2019, 10:49 AM

What format is the file? Is the pitch lower as well? If so, that is a sample rate issue. The file could be 48k or higher and playing back at a lower rate, such as 44.1 kHz. Vegas normally accepts mixed sample rates events on the same timeline and track, but the file's metadata could be corrupted. Try raising the audio sample rate in 'Properties'. If that does not help, I use Sound Forge Pro (File> View> File Properties> Custom sample rate) to alter it, then re-sample back to 48k and save as a PCM file.

daniel-s7451 wrote on 3/8/2019, 1:13 PM
Recorded 60fps, VFR with Lumix GH4 which doesn't record audio at that rate.

But have good audio recorded to Marantz PMD661M 11.

Two problems:

1) no scratch video to sync to.

2) how to return video to "normal" playback to even begin a manual sync.

Clearly a case of operator error! I take full responsibility. if I can avoid a reshoot that would be helpful.

 

.DanDevice name    Dan-PC
Processor    Intel(R) Core(TM) i7-2600K CPU @ 3.40GHz   3.40 GHz
Installed RAM    16.0 GB
Device ID    6A5833A6-196E-4B0E-B256-26DF52603A31
Product ID    00330-80000-00000-AA020
System type    64-bit operating system, x64-based processor
Pen and touch    No pen or touch input is available for this display

Edition    Windows 10 Pro
Version    21H1
Installed on    ‎9/‎22/‎2021
OS build    19043.1237
Experience    Windows Feature Experience Pack 120.2212.3530.0
 

rraud wrote on 3/10/2019, 12:12 PM

Can you post media info for the file.

https://www.vegascreativesoftware.info/us/forum/faq-how-to-post-mediainfo-and-vegas-pro-file-properties--104561/

Frame rates and sample rates are two different things. Audio does not care what the frame fate is and video does not care what the audio sample rate is. The typical sample rate in sound-for-pictures is 48kHz. in some NLEs that can get changed to 44.1k, which would playback slower and lower the pitch some as well. As I stated, Vegas can deal with different audio sample rates on the same timeline but if file's sample rate metadata stamp is corrupted, that can cause problems, if it plays back normally on the recording device, you could re-record the audio through a analog output and use that.. or as a sync reference for the Marantz audio file. Otherwise you can try to sync it visually. Dialog only is tough but music is doable, if the picture shows a percussionist or has other good visual clues. (a clap slate comes to mind)