Red color strobing using CCE conversion

[Blackout]

Hi,

im converting an avi (made from a video tape source) to mpeg2. CCE 2.66 (and below) seems to make the red colors in the picture kinda scroll/pulse horizontally in bars...all other colors seem to look flat and fine. If youve had this problem before and solved it pls let me know.....is there a setting in CCE that might reduce this? I was thinking the "Low Pass Filter" might be responsible or help...what exactly does this setting do to the picture?

Many thanks,
Blackout

[Blackout]

Just as a side note, its interesting but i still get the red scrolling with shaded bars horizontally when i hit PAUSE on the DVD player, and the picture is frozen....wierd...what does that imply?

Many thanks,
blackout

[snowmoon]

Blackout:

If the pulsating does not stop when you pause it has little to do with your encode. It means that your TV has a poor comb filter. A search of google will turn up more information. This type of stobing is a form on interferince pattern between the B&W video signal and the color video singal transmitted on the same cable.

You can improve this by attaching your DVD player via S-Video or Componient cables rather that the poor composite cable. If it's already connected this way you will have to give more info for others to diagnose ( tv, connectors, dvd player, other compnients attached to the TV, .. ).

[Blackout]

Hi snow,

thanks for your response, that isnt the problem, when i play DVDs or indeed the same footage converted using TMPGEnc, it doesnt scroll or "pulse" on the reds. But with CCE im getting this problem. Id prefer to use CCE as the overall quality is much better.

The original footage is video clips from VHS, im pretty sure they are film. So the original footage is progressive, but ive captured interlaced and processed interlaced...just to be safe as some of the film clips might be cheap ones shot to video. Could the fact that im processing some of the film clips in interlaced mode the problem?

Many thanks,
Blackout

[snowmoon]

Blackout...

It's not necessarly the encoder. The only reason CCE does and TMPGenc does not is probably for one of several reasons. One possibility is that TMPGenc is throwing away lumi-masked color data leading to a reductin in color contrast. The other is that CCE is just better at encoding the subtle items in the video including the red shimmer. The other possibility is that you are using filters with TMPGenc that are reducing the effect of the shimmer. Personally I believe it's because CCE is much better and the higher color contrast is allowing you to finally see the effect.

The effects that you are seeing is called "Shimmer" or "dot crawl" and it is inherint in NTSC video. You can reduce it's effect by using the appropriate filter pre-encode. Even with the appropriate filter you will still see it if your DVD player is connected to your TV with standard A/V cables aka composite ( not to be confused with high end componient ).