Resizing on render alters colors

VEGAS Pro

Resizing on render alters colors

Posted by Adam Sandler on March 2, 2017 at 3:20 pm

Hello, guys.
I noticed that if I render clip in it’s original size – it comes out exactly as source, but if I change resolution in becomes more redish.
Here is specs:
Source file:
Format : MPEG-4 Format profile : Base Media Codec ID : isom (isom/iso2/avc1/mp41) File size : 9.06 GiB Duration : 1 h 53 min Overall bit rate : 11.4 Mb/s Writing application : Lavf56.30.100
Video ID : 1 Format : AVC Format/Info : Advanced Video Codec Format profile : High@L4.1 Format settings, CABAC : Yes Format settings, ReFrames : 9 frames Codec ID : avc1 Codec ID/Info : Advanced Video Coding Duration : 1 h 53 min Bit rate : 11.3 Mb/s Width : 1 280 pixels Height : 694 pixels Display aspect ratio : 1.85:1 Frame rate mode : Variable Frame rate : 23.976 (24000/1001) FPS Minimum frame rate : 23.810 FPS Maximum frame rate : 24.390 FPS Color space : YUV Chroma subsampling : 4:2:0 Bit depth : 8 bits Scan type : Progressive Bits/(Pixel*Frame) : 0.530 Stream size : 8.95 GiB (99%) Writing library : x264 core 142 r2431+42 c69a006 tMod [8-bit@all X86_64] Encoding settings : cabac=1 / ref=9 / deblock=1:-3:-3 / analyse=0x3:0x133 / me=umh / subme=9 / psy=1 / fade_compensate=0.00 / psy_rd=0.80:0.00 / mixed_ref=1 / me_range=24 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=0 / chroma_qp_offset=-2 / threads=6 / lookahead_threads=1 / sliced_threads=0 / nr=0 / decimate=0 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / fgo=0 / bframes=8 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=23 / scenecut=40 / intra_refresh=0 / rc=crf / mbtree=0 / crf=18.0000 / qcomp=0.60 / qpmin=0:0:0 / qpmax=69:69:69 / qpstep=4 / ip_ratio=1.40 / pb_ratio=1.30 / aq=4:0.75 / aq-sensitivity=10.00 / aq-factor=1.00:1.00:1.00 / aq2=0 / aq3=0

Render settings:
Sony AVC internet template Profile: High Frame rate: 23.9 Bitrate: 25mbs Field order: none (progressive) pixel aspect: 1 Frame size: 1280:694 (original)

Project properties pixel format has to be 32bit to get original sized video to be exactly as source.

But if I change render Frame size to any other(correct 720p or 1080 or even 1920×1041) colors become more red or something. It is the same clip, same properties, same codec – everything is the same except frame size. I tried to play with levels, curves, and other color corrections – but still I can’t get exact colors.

What am I doing wrong?

Dan Harlow replied 9 years, 2 months ago 6 Members · 23 Replies
23 Replies

Graham Bernard
March 2, 2017 at 4:16 pm

For The purposes of comparisons, show us the MediaInfo for the non-red good media.

* Grazie

Video Content Creator and Potter
PC 7 64-bit 16gb * Intel® Core™i7-2600k Quad Core 3.40GHz * 2GB NVIDIA GEFORCE GTX 560 Ti
Cameras: Canon XF300 + PowerShot SX50HS Bridge
Adam Sandler
March 2, 2017 at 4:53 pm

I have added image with color comparsion to first post but it did not come up. Here it is https://prnt.sc/ef4wvn

Here is data of correct video
Format profile : Base Media / Version 2 Codec ID : mp42 (mp42/isom) File size : 2.82 MiB Duration : 901 ms Overall bit rate mode : Variable Overall bit rate : 26.3 Mb/s Encoded date : UTC 2017-03-02 13:42:59 Tagged date : UTC 2017-03-02 13:42:59
Video ID : 2 Format : AVC Format/Info : Advanced Video Codec Format profile : High@L4.2 Format settings, CABAC : Yes Format settings, ReFrames : 2 frames Muxing mode : Container profile=High@4.0 Codec ID : avc1 Codec ID/Info : Advanced Video Coding Duration : 901 ms Bit rate mode : Variable Bit rate : 26.0 Mb/s Width : 1 280 pixels Height : 694 pixels Display aspect ratio : 1.85:1 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) : 0.977 Stream size : 2.81 MiB (99%) Language : English Encoded date : UTC 2017-03-02 13:42:59 Tagged date : UTC 2017-03-02 13:42:59

here is resized video(it just added black bars)

Format : MPEG-4 Format profile : Base Media / Version 2 Codec ID : mp42 (mp42/isom) File size : 2.82 MiB Duration : 901 ms Overall bit rate mode : Variable Overall bit rate : 26.2 Mb/s Encoded date : UTC 2017-03-02 13:43:26 Tagged date : UTC 2017-03-02 13:43:26
Video ID : 2 Format : AVC Format/Info : Advanced Video Codec Format profile : High@L4.2 Format settings, CABAC : Yes Format settings, ReFrames : 2 frames Muxing mode : Container profile=High@4.0 Codec ID : avc1 Codec ID/Info : Advanced Video Coding Duration : 901 ms Bit rate mode : Variable Bit rate : 26.0 Mb/s Width : 1 280 pixels Height : 720 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) : 0.941 Stream size : 2.80 MiB (99%) Language : English Encoded date : UTC 2017-03-02 13:43:26 Tagged date : UTC 2017-03-02 13:43:26

Tried the same thing in Adobe Premier with H264 codec and there is not color change during resizing.
And here is specs of AP video file
Format : MPEG-4 Format profile : Base Media / Version 2 Codec ID : mp42 (mp42/mp41) File size : 106 MiB Duration : 1 min 23 s Overall bit rate mode : Variable Overall bit rate : 10.7 Mb/s Encoded date : UTC 2017-03-02 16:45:48 Tagged date : UTC 2017-03-02 16:45:49 ©TIM : 01:41:54:16 ©TSC : 24000 ©TSZ : 1001
Video ID : 1 Format : AVC Format/Info : Advanced Video Codec Format profile : Main@L3.1 Format settings, CABAC : Yes Format settings, ReFrames : 3 frames Format settings, GOP : M=4, N=23 Codec ID : avc1 Codec ID/Info : Advanced Video Coding Duration : 1 min 23 s Bit rate : 10.4 Mb/s Width : 1 280 pixels Height : 694 pixels Display aspect ratio : 1.85:1 Frame rate mode : Constant Frame rate : 23.976 (24000/1001) FPS Standard : NTSC Color space : YUV Chroma subsampling : 4:2:0 Bit depth : 8 bits Scan type : Progressive Bits/(Pixel*Frame) : 0.487 Stream size : 103 MiB (97%) Language : English Encoded date : UTC 2017-03-02 16:45:48 Tagged date : UTC 2017-03-02 16:45:48 Color range : Limited Color primaries : BT.709 Transfer characteristics : BT.709 Matrix coefficients : BT.709
Adam Sandler
March 2, 2017 at 4:55 pm

Video details provided my Media Player Classic HC
I use clean install of k-lite mega codec pack
Richard Jones
March 2, 2017 at 6:25 pm

The k-lite package might be the source of the problem! Many, many people have complained about the conflicts it creates and is difficult to uninstall.

Richard
Adam Sandler
March 2, 2017 at 8:55 pm

I don’t see how that urban legend can affect all codecs my Vegas 13 using. Moreover there are tons of threads where Vegas alters colors, and probably zero threads where k-lite pack was proven guilty on something.
Marco Baer
March 2, 2017 at 10:24 pm

You should try disabling GPU support in both Options/Preferences/Video and in your render settings. GPU boost could cause strange trouble (though I wouldn’t get too far from K-Lite as troublemaker).
Adam Sandler
March 2, 2017 at 11:13 pm

[Marco Baer] “You should try disabling GPU support in both Options/Preferences/Video”

Well, that did not fix color issue, but surprisingly it fixed other non related issue, where .avi Lagarith encoded clip that was above some other clip suffered from strange 10px wide vertical transparent line flicking every few frames. https://prntscr.com/efbfye

I found almost optimal Level FX values(1.050 green gamma 0.900 green input end and 1.050 red gamma) that almost matches source, but still looking for proper fix for color issue.
Marco Baer
March 2, 2017 at 11:41 pm

That color drift is really strange.

Do you see same drift if using a technical color bar (like the ones provided in the Vegas Media Generators) if using same size and applying same resizing?

Or could you offer a sample project with an small media file which for download for testing purpose?
Adam Sandler
March 3, 2017 at 12:08 am

I just used virtual windows 7 machine, no codecs whatsoever installed. Installed vegas 13. Imported mp4 file that vegas did on his own(with it’s own codecs), rendered 1280×694 file which is correct copy of source file.
Rendered with sony avc internet template as
1280×694 – no color change
1280×720 vegas cropped and zoomed image (adjust source media to project settings) – colors shifted
1280×720 with black bars ( unchecked adjust smtps) – colors shifted
1280×720 with black bars and 32bit pixel format ( unchecked adjust smtps) – colors shifted.

It is not K-lite codec pack.

here is sample video I try to resize
https://www.sendspace.com/file/2xflqm
Adam Sandler
March 3, 2017 at 2:02 am

I run few test with SMPTE ntsc color bars
On new project with default settings 1920×1080. GPU acceleration off.
sony avc codec internet preset.
Final .mp4 opened MPC-HC and I saved screenshot from player into .bmp file and used photoshop pipette tool to check color numbers.

All standard HD frame sizes 720 1440 1920 – all look good. Red is 190 0 0, green is 0 190 0. All looks good.

Standard Non HD resolutions(like 640×480) have minimal fluctuations like red 190 1 0 or green 0 188 0 – seems okayish

Non standard resolution like 1280×694 – red 206 17 0 green 0 160 0 blue 0 11 197
or 1564×694 red 206 17 0 green 0 160 0 blue 0 11 197
random 888×666 red 206 17 0 green 0 160 0 blue 0 11 197

however another random 1256×576 gives proper colors with minimal fluctuations like red 190 1 0 or green 0 188 0 – seems okayish
and 888×720 gives 190 0 0 – clean rgb.

So it is something with how codec works with non standard Height size.

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