Applying HSL Filter results in ugly pinkish, purple hue

wvg wrote on 7/9/2001, 5:30 PM
It is impossible to tweak any video with the HSL filter and get a correctly rendered output file using either AVI or MPG formats.

Situation:
Editing a video, applying various filters, the results in the preview window correctly reflect the changes I made. Playing the movie from within Video Factory the changes are as they should be.

However, clicking the render button, if I've used the HLS filter the video preview immediately takes on a pinkish/purple overcast blocking out all other colors regardless how much or how little of the HSL filter effect is appied. This distortion also shows up in the rendered file ruining the effort.

If I apply the exact same filters and render as a RM (Real Media) file the filters are applied correcly and I get a very nicely adjusted result.

Since I want to be able to use MPEG-1 and do a VCD format for playing on a DVD player I must use the MPG encoding scheme, so I need the HSL filter to work correctly when rendering a MPG output file. It does not.

Is this a known issue?

When will it be addressed?

Is that a work around or replacement filter?

Comments

SonyEPM wrote on 7/10/2001, 9:17 AM
It is possible you have cranked the colors beyond the range that your destination codec (mpeg or whatever) can handle. Try backing off on the color correction a little and see if that helps.

wvg wrote on 7/10/2001, 9:38 AM
Please read what I said, repeated below:
However, clicking the render button, if I've used the HLS filter the video preview immediately takes on a pinkish/purple overcast blocking out all other colors regardless how much or how little of the HSL filter effect is appied. This distortion also shows up in the rendered file ruining the effort.

ANY AMOUNT OF THIS FILTER, even 1% distorts the file to the point it is unusable. Not while editing, only once I start rendering. The preview during editing looks great, which is what is so frustrating!

So you think great, lets make the video and Video Factory immediate ruins the effort as soon as it starts to render.

This seems to be related to the MPGEG plug-in which suggests it is defective or there seems to be some serious bug in the main program.

Have you tried to duplicate the problem?

I've tried Video Factory on 4 different machines, each with a different video card and on each one any attempt to use the HSL filter results in the pinkish purple hue as soon as I attempt to render the file.



SonyEPM wrote on 7/10/2001, 10:45 AM
I am unable to reproduce this problem. Using DV footage in a DV project, I have added the HSL plug-in with hue .06, sat 1.05, lum 1.05, and rendered that to both VideoCD and DVD/better templates. The colors of the file, played back in Windows MediaPlayer7 closely match the preview monitor.

Questions:

1) What is the project template you are using?
2) What is the source format you are using? (compressor, size etc)
3) Does the file display these ugly characteristics if you open it back up in VideoFactory? or is it just in your media player?


wvg wrote on 7/10/2001, 1:13 PM
Questions:

1) What is the project template you are using?

Video VC NTSC because I wish to burn a CD with the final video.

2) What is the source format you are using? (compressor, size etc)

The source is either a MPEG-1 file or a AVI file converted to a MPEG-1. I tired all sizes from just 20MB up to 400MB and always have the same problem.

According to Microsoft's Media player the codec's are as follows:

Ligos MPEG Video Decoder
MPEG Audio Decoder

3) Does the file display these ugly characteristics if you open it back up in VideoFactory? or is it just in your media player?

You still seem to be missing the point.

The ugly characteristics appear in VideoFactory in the preview window as soon as it starts rendering the video. During editing, I can change the filter as I wish and it works correctly and the changes appear in real time in the preview window without any distortion.

Regardless if I stop the render or let it complete, if I attempt to play the video in Media Player or ANY player (I tried 5 different players) or if I reopen the rendered file in VideoFactory, it shows the ugly pinkish, purple hue. In other words, the act of rendering messes up the file. No matter if just 1.01 of the filter is applied or anything higher.

As I stated before I tried this on multiple machines with various viedo cards, so it don't appear to be on my end. I seems to me to be something wrong with the MPEG plug-in, since as I also said before I can render the same source file as a RM file and it works perfectly.
SonyEPM wrote on 7/10/2001, 4:57 PM
I'm wondering if this is an MPEG-to-MPEG transcode issue. Do you get the same result with source files that are not (and have never been) in the MPEG1 format?

Please email me (daveh@sonicfoundry.com) a short sample (2-3 seconds is fine) of the MPEG source material you are using and I'll try to reproduce it here.

As a further note, we do not recommend the use of MPEG as a source format- it is heavily compressed and artifacts can be a real problem with multiple renderings. MPEG is ideally a "destination-only" format. Use avi whenever possible for best results.

more info here: http://www.sonicfoundry.com/download/step2.asp?DID=245