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User : porn9 (2)  

Feedback:   All (4)  |   Reviews (1)  |   Comments (0)  |   Replies (3)

Other:   Replies Received (3)  |   Trust Ratings (7)

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Shown : 1-4 of 4  

Type Site - Score Feedback / Review Date
Visit Zero Tolerance On Demand

Zero Tolerance On Demand

Status: Was a member approx. 1 month prior to this review.
Pros: 1. Underlying videos are often high quality in terms of the actual scene itself. It is unfortunate that what appears to be deliberate poor video encoding is used to ruin the quality of the content.
2. The majority of the ZTOD catalog from
2008 on is available (although scenes are substituted - see below)
Cons: (please keep in mind these cons are for a throttled user that the site is trying to encourage to log off with poor quality and bad user interface. A user who logs in for 10-30 minutes every couple of days will likely get another experience)
1. Exhibit high usage and the site "upgrades" but the copyright notices are years earlier. The "upgraded" site will lack search capabilties and will not display dates of videos, names of performers or videos or allow multi-category searching.
2. Throttling is present. The slower the site will get and videos will disappear.
3. Downloads - particularly 1080p - are encoded in ways to make bloated, poor quality mp4.

Technically, >20 files checked the ratio of P (prediction) to I(key) frames was 19:1. A typical ratio is 2:1. I frames aka key frames are the actual images while p frames are the compression. During action the key frames shrink making details too blurry to see. Expect most downloads to be poorer than DVD quality.
Bottom Line: If you are the type of person who just wants to get online and view a video or two to get off, then long off, and don't intend to download anything this site could be for you. The quality should be great.

But if you like to download or watch for hours on end prepare to be throttled severely and to find the videos you download are severely color distorted and bloated.

02-02-13  09:26am

Replies (3)
Visit Zero Tolerance On Demand

Zero Tolerance On Demand
Reply of porn9's Review

Another method of reducing quality while keeping files large I've seen on multiple sites is "pan and zoom" manipulation. This is used on ZTOD and involved what appears to be the camera man moving. But upon frame by frame analysis the direction of movement does not matche the perspective changes.

For example. The Camera is moving to the right, but looking at an actresses arm in ratio to a further away object like the headboard it is obvious that the camera isn't actually moving or shaking. This extra movement consumes valuable bits (since portions of scene come in an out of frame).

I have videos encoded at one-sixth the size of ZTOD movies that are far better quality. This isn't to say all videos are bad from the site, but the quality will change if you are more than a casual user, and the UI is setup so you never can see the end of a video - and the beginnings are typically encoded well.

02-02-13  09:45am

Visit Zero Tolerance On Demand

Zero Tolerance On Demand
Reply of benmar51's Comment

There is good content in there but don't appear like you want to view
It longer than it takes to get off or the interface will make that content unreachable or unviewable, or just provide 14 minutes of interview and stripping on a 30 minute scene.

02-02-13  09:32am

Visit Zero Tolerance On Demand

Zero Tolerance On Demand
Reply of Burned's Comment

The color shifting is quantization and it varies depending on how much the site is used. Higher viewing times and more downloading results in the video quality degrading both in downloads and online. And once a video is viewed or downloaded in poor quality it remains that way, even of you resubscribe after canceling membership.

02-02-13  09:28am

Shown : 1-4 of 4  

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