The first is a 120 min limit on any single title. Builder gives a message and won't let you proceed when this is exceeded. The second is a limit on the size of an image file (ISO) that Builder will write. It stops when the file reaches 7.95 GB (size reported by Windows Explorer) and all video content above that is cut off. Sometimes an error message about the menu is given but not always. Approximate cut off times for different video qualities are
Best - 9mbps: 120 min
Good - 8mbps: 135 min
Med - 7mbps: 154 min
Low - 4mbps: 270 min
The third problem is more serious since it happens with shorter projects. It starts when the ISO file size goes slightly above 4.35 GB and Disc Copier is used to compress it to fit a standard single layer DVD disc. The result is a portion of the middle of the video will be repeated when the disc is played back on a set top at normal speed. Approximate times for this are
Best - 9mbps: 65 min
Good - 8mbps: 74 min
Med - 7mbps: 84 min
Low - 4mbps: 148 min
The amount repeated increases from zero at these times to an hour or more for longer projects.
There is no warning that a problem happened during the burn, and it is easily missed because usual quick checks on a computer or with a set top player won't show it. It will show up when you sit down to watch all of it in real time on a set top player though. (Special techniques for quicker checks are given later.)
Typically, somewhere well into the video, the time displayed by the player will start cycling. After a couple of transitory cycles, it will settle into a regular 30 sec cycle. This isn’t objectionable, but, sometime later, playback will suddenly return to the point where cycling first started, repeat play between the two points, and then proceed to the end as if nothing were wrong. Time will continue to cycle until the return point is reached on the second pass. It will then recover and again synchronize with displayed video.
This is the behavior expected for most projects. But it can be different in a few rare cases, like when cycling starts near the beginning or end of a title and is hardly noticeable. Some video will always be repeated though, even if you see minimal or no time cycling.
This is bizzare behavior and probably hard to believe. The problem does exist though with any project longer than the above times. I have confirmed it on a clean system with minimal software installed. So the problem is in Builder's code, not one induced on my end.
Both the time where cycling starts and that where the playback suddenly returns to it are predicatble. I won't clutter this post with the equations but I can present them later if needed.
A fairly simple test project is given below that can be used to easily confirm the problem. It will vividly illustrate what happens and give guidelines for checking normal projects. I urge everyone to try it and check for themselves. Relying on impressions from any negative responses to this post may cause much disappointment later. It won't take longer to try than your usual projects.
In the VideoWave Storyline view, insert the following color panels (adjust duration to times shown):
3480 sec red in 1st panel
120 sec yellow in 2nd panel
510 sec green in 3rd panel
120 sec yellow in 4th panel
360 sec blue in 5th panel
Click "Burn production to disc" and save the project so it will open in Builder (project size will be 5529.0 MB there). Click Burn in Builder and choose to save it as an image file at Best quality and AC-3 audio. The size of the created image file reported by Win Explorer will be 5.00 GB. Use Disc Copier to burn the image to a single layer DVD, RW if you have one.
Now play the disc in your set top. Fast forward through the red part and start normal speed playback when the screen changes to yellow. If there were no problem, playback would progress smoothly through the green, 2nd yellow, and blue panels and then return to the menu. Watch closely for the next 15 min or so.
Time displayed by the player will start cycling about 1/2 min into the green part. You can probably set an onscreen time display if your player doesn't show it on the faceplate. Otherwise, make a note of your watch time when the green part starts, the return and repeat of the video will start about 11 min after that. Play will continue through the green and the second yellow part. About 1/2 min after the blue part starts, playback will return to the cycle point and the screen will suddenly turn green again. It will then repeat the approximate 10 1/2 min between the two points. (Again, the amount repeated increases in longer videos.) Displayed time will continue to cycle until the return point is again reached in the blue part on the second pass. It will then suddenly change to reflect values it would have shown if no problem had happened. You can fast forward again now if you want or continue at normal speed. Playback will continue to the end of the blue and return to the menu.
Win Media Player 9 and 10 or Cineplayer can also be used to check this test disc, or any suspect one, for the problem using techniques given below. (Note: Check compressed discs only, the problem won't show up in the image file. The presence of a ROXIOPLASMA folder on an existing disc means Disc Copier didn't compress it, so it won't have the problem.)
Start play and drag the time slider to some point after 58 min and then release it. The screen action will pick up and continue normally if you released anywhere before the cycle point or after the return point. The action will freeze however when you release between those two points. In other words, the screen scene will remain the same as it was when you first grabbed the slider. Time and audio wil progress normally though. This freeze is all that is needed to show a problem on the disc. Note that finding a point between cycle and return is hard, and may be impossible, for shorter videos only slightly above problem onset.
You can use this behavior to bracket the cycle and return points when they aren't known for projects on existing discs - info that will help when checking on a set top. Just be sure to stop and restart play before proceeding after screen action freezes, to prevent program hang.
Time cycling will show with these software players if you release before the cycle point and then let play continue. But, even though they can be used to estimate where the return point is, they won't show the actual return and repeat of video.
This post has been edited by ckhouston: 17 January 2006 - 06:16 AM

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