[John Fishback]

Josh, I’m not clear if the program works with SMPTE timecode. It looks perfect for an upcoming Flash project where we have to review 14 hours of video to make selects and pull times for cue points in Flash.

John

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[John Fishback]

There are lots of posts about this issue. Here’s another idea if the above doesn’t work.

https://forums.creativecow.net/cgi-bin/new_read_post.cgi?univpostid=492915&forumid=155&postid=494445&pview=t&archive=T

John

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[John Fishback]

Actually, if you just drop the frame rate and the data rate remains the same, you get the same size file with greater visual quality because the codec has half the pixels to worry about and applies the same data rate to those remaining pixels. If you want to save file size you have to also lower the data rate when you halve the frame rate. You need to experiment how much you can drop the data rate because the relationship between data rate and quality is not linear.

John

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[John Fishback]

Just tried the same settings with a constantly moving image and the results were very good. Make sure in video settings that the compressor setting is best. That enables 2-pass encoding which will give much better results, although, it slows down the encoding time.

John

Dual 2.5 G5 4 gigs RAM OS 10.4.3 QT7.0.3
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[John Fishback]

I played around with H.264 while you guys were discussing this. I used a talking head I had in my box that was 8-bit uncompressed from Beta. I used a frame size of 280×210. In video settings I set 500kbps as the data rate and in audio settings 96kbps. The resulting data rate was 512kbps (go figure). Final file size for a 1:50 clip was 7.8MB. The quality looked excellent. However, the clip was pretty static. If your clip has lots of action, that will stress the codec more and the overall visual quality will suffer. I bet I could drop the data another 100kbps or more for a talking head and still have very good quality. As Walter suggested, play with the settings.

John

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[John Fishback]

Can SyncVUE be applied to remote ADR in any way?

John

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[John Fishback]

My understanding is that reference tone was meant to be a way to allow another engineer in a different facility to set a level when playing your tape and not have to listen to the entire program tracking the peaks to make sure nothing clips (distorts). With analog tape proper practice was to never exceed +3 over 0VU.

I guess the same theory holds today. If the tone on a tape you receive is at -20 or -14 and you setup your input to play those tones at -20 or -14, no peak should go to a level that would clip the audio (ie. exceed 0 on the digital scale).

If you are mixing a film with dynamic audio content the dialog might be at -30 to -20 with explosions going close to clip level (0 digital). If the program is a commercial, it’s more likely it will be highly compressed to raise its average level to the max so the commercial sounds “loud.” I would expect that the peaks of this kind of program would be near 0 digital.

When I mix audio for a DVD for an industrial video, I typically use mediun compression and let peaks go to -6 on the digital scale. This way, the DVD will have plenty of punch if it needs to play in a loud envirnment. As long as you don’t clip the signal, it’s all relative. If your audio on a DVD has peaks going to -20 then audio will have to be cranked up at playback. But may still be too “soft” in certain situations.

John

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[John Fishback]

I read the link and it has an inacurracy, although, following the directions will decrease the file size. The author claims the file’s size is smaller in part because of the lower frame rate and smaller image size. This isn’t true. The data rate determines the file size. By using a lower frame rate and a smaller image size, you apply the codec’s horsepower to less pixels so the image looks better at the lower data rate.

John

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[John Fishback]

How is it that certain audio control surfaces can display the timeline’s timecode, but there isn’t a way to gain access to it. That timecode is probably being sent via midi. Someone should develop a means to get to that MTC. Then it can easily be converted to SMPTE timecode with any number of existing boxes.

John

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[John Fishback]

https://www.nattress.com/standardsConversion.htm

John

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