Difficulty Previewing Entire Video At Its Actual Speed

VPR0444 wrote on 2/21/2019, 12:16 PM

Hi,

I've been having a difficult time previewing my video in Vegas Pro 15. I've tried doing the Dynamic Ram Preview, by hitting shift + b, but that's not working anymore after I've added a Red Giant effect. My video is about 1 minute and 15 secs long. Not much going on. Just some video footage with text added in Vegas. I nested the project so I could add my Red Giant effect to the entire video.

More details below:

Before I added the effect, I tried the methods used in this video and it worked for a little bit: he takes forever to get to the point - so if you want to actually see what he does in this video, skip to 1:18).

Then I kept seeing people say to hit Shift + B for a Dynamic Ram Preview.

I did that, and it worked pretty well. But the problem is that it would only show me a smooth preview at the actual speed of the video in little chunks.

I would have to highlight the remaining portion of the video that Vegas wasn't able to preview. Then when I hit Shift + B again, it would only preview a small part of the video once again (about 2 seconds) every time I hit shift + b.

Then I would repeat this process until I have seen the entire video, in little 2 second chunks that vegas was able to show me a preview for at pretty much at its actual speed.

This was all before I added any FX to the video.

Now I've added Red Giant Universe VHS effect, and I'm lucky if I can even get 2 seconds of the Dynamic Ram Preview at all after hitting shift + B.

I understand that adding the FX can make the preview much slower. And that my PC specs also play a part in the slow preview. But I'm hoping any of you know any tips or tricks I can use to actually have a smooth preview of my video. And it would be nice to playback the entire video at once at its actual speed, and not having to play back the video in the little chunks that vegas is able to preview.

-------------------------

I'm using Vegas Pro 15.

Hardware I have in my machine:

Graphics Card: Intel (R) HD Graphics 520

Processor: Intel (R) Core i3 -6100U CPU @ 2.30GHz 2.30 GHz

Intalled RAM: 8GB (7.89 GB Useable)

System Type: 64-bit Operating System

Running on Windows 10

Your help is very appreciated!

Comments

klt wrote on 2/21/2019, 12:20 PM

Would you like to try selective prerender?

j-v wrote on 2/21/2019, 12:27 PM

And your sourcefiles have what settings?
Show it here with MediaInfo. Your i3 is weak for using FHD AVC files, for normal behaviour you should use at least an i7 processor.

xberk wrote on 2/21/2019, 1:04 PM

I agree with j-v .. your CPU is not up to Vegas Pro spec.

Intel, Core i3 is a dual-core CPU.

Magix Vegas Pro minimum system requirement is now for 4 cores ..

"Processor: 2.5 GHz 4-core processor (3 Ghz and 8 cores recommended for 4K)" ..

Eagle Six wrote on 2/21/2019, 1:51 PM

@VPR0444 Check Preferences > Video tab 'Dynamic RAM Preview max:' which by default is set at '200'. If so, increase that to maybe '1000', and try the Dynamic Preview again, you should then get a long play length. For longer sections the the option under Tools > 'Selectively Prerender Video' will take longer, however you can select the render template and play back longer selections without robbing your RAM. Type in 'Selectively Prerender Video' into the Index Help to find instructions.

VPR0444 wrote on 2/22/2019, 10:27 AM

And your sourcefiles have what settings?
Show it here with MediaInfo. Your i3 is weak for using FHD AVC files, for normal behaviour you should use at least an i7 processor.

Thanks for letting me know what type of processor I need. I'm looking to get a new computer soon and I will take note of that. Need something better able to handle video editing projects.

I have one source file. Here are the settings:

Format : MPEG-4
Format profile : Base Media / Version 2
Codec ID : mp42 (mp42/isom)
File size : 122 MiB
Duration : 1 min 3 s
Overall bit rate mode : Variable
Overall bit rate : 16.1 Mb/s
Encoded date : UTC 2019-01-05 19:40:36
Tagged date : UTC 2019-01-05 19:40:36

Video
ID : 2
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4
Format settings : CABAC / 2 Ref Frames
Format settings, CABAC : Yes
Format settings, RefFrames : 2 frames
Format settings, GOP : M=2, N=15
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 1 min 3 s
Bit rate mode : Variable
Bit rate : 16.0 Mb/s
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 29.970 (30000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.257
Stream size : 121 MiB (99%)
Language : English
Encoded date : UTC 2019-01-05 19:40:36
Tagged date : UTC 2019-01-05 19:40:36
Codec configuration box : avcC

Audio
ID : 1
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 1 min 3 s
Bit rate mode : Constant
Bit rate : 128 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 997 KiB (1%)
Language : English
Encoded date : UTC 2019-01-05 19:40:36
Tagged date : UTC 2019-01-05 19:40:36

j-v wrote on 2/22/2019, 11:03 AM

For now you have a few a few possibilities to fasten your preview
1. Play around with the preview settings

2. Use proxy files ( and read what settings you need in the "Help")

3. For only selected small parts one of these option

Added: of course in the last picture also belongs the option "Render to New Track"

fan-boy wrote on 2/23/2019, 1:36 PM

you have 8 gig system memory . As tested here , every 4 gig gives approx. 1 minute of Dynamic RAM preview . using 1920 x 1080 , 8 bit Project setting , with Preview-->Auto .

menu : Options-->Preferences-->Video Tab , set to 4000 . I set to 8000 cause got 16 gig system memory . and while you are there . right below that is the GPU combo box . does Vegas detect your Intel 520 ? . If so , that should greatly speed up time line processing , when using FX that access GPU . In BIOS can you , force the Intel 520 to use more system memory . Here , I set BIOS Forced , to use 2 gig of system memory , leaving about 14 Gig , at boot time . using AMD APU GPU R7 . I would think the Intel 520 should be able to handle it too .