Forcing Project & Render Properties to Match Src

kraz wrote on 12/20/2011, 6:05 AM

I am making a video that will be using mpegs generated by Proshow (photodex.com) - and I will only be adding in audio and some minor effect to small parts.

I want to set it up - that when it makes the mpeg final product - I want to to NOT re-render. "No Recompression required"

Usually the no need to re-render only works for me when I take an MPEG that I made in Vegas and put it back in Vegas - here my source is NOT from Vegas. But a different Creation software.

I have tried to manually change the video settings to match the specs of the source file but it still recompresses.

I'm sure I am missing something silly.

Thanks
Allen

Comments

kraz wrote on 12/21/2011, 4:32 AM

Since I got no replies I thought maybe I did not explain it well enough

is there any way with MPeg to not have it recompile - even if the original was not created in Vegas

PeterDuke wrote on 12/21/2011, 6:24 AM

Could you post the Mediainfo analysis of your MPEG file?

musicvid10 wrote on 12/21/2011, 10:03 AM

The most critical factors for a successful smart-render are resolution and PAR, frame rate, field order, and average bitrate.

kraz wrote on 12/21/2011, 11:54 AM

Well first I had to figure out what MiediaInfo was - but I did - and here it is - I hope its the right format.

Thanks

General
Complete name : D:\customers\Elisha Weiss\Chapters\Ciment complete.mpg
Format : MPEG-PS
File size : 253 MiB
Duration : 3mn 41s
Overall bit rate mode : Variable
Overall bit rate : 9 584 Kbps
Writing library : Photodex mpeg encoder

Video
ID : 224 (0xE0)
Format : MPEG Video
Format version : Version 2
Format profile : Main@Main
Format settings, BVOP : Yes
Format settings, Matrix : Default
Format settings, GOP : M=3, N=18
Duration : 3mn 41s
Bit rate mode : Variable
Bit rate : 9 200 Kbps
Width : 720 pixels
Height : 480 pixels
Display aspect ratio : 4:3
Frame rate : 29.970 fps
Standard : NTSC
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Interlaced
Scan order : Bottom Field First
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.888
Stream size : 242 MiB (96%)
Writing library : Photodex mpeg encoder
Color primaries : SMPTE 170M
Transfer characteristics : SMPTE 170M
Matrix coefficients : SMPTE 170M

Audio
ID : 192 (0xC0)
Format : MPEG Audio
Format version : Version 1
Format profile : Layer 2
Duration : 3mn 41s
Bit rate mode : Constant
Bit rate : 224 Kbps
Channel(s) : 2 channels
Sampling rate : 48.0 KHz
Compression mode : Lossy
Delay relative to video : -33ms
Stream size : 5.92 MiB (2%)

kraz wrote on 12/27/2011, 10:05 AM

is this the right data?

Marton wrote on 12/27/2011, 10:31 AM

Try with constans bitrate (CBR) instead of VBR.
I can smartrender mpeg files in Vegas which came from Procoder.

PeterDuke wrote on 12/27/2011, 7:15 PM

The video bit rate looks a shade high. Can it be dropped to 6 to 8 Mbps?

kraz wrote on 12/28/2011, 12:19 AM

In theory I can make changes in proshow when I generate the file to be whatever I like.

What settings would you recommend I do on Pro-show that will get me to a state in vegas that it will not re-render?

Thanks
Allen