FAQ - General things related to our products

Frequently asked questions about our products and our website
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Registriert: 19.09.2005, 10:43

FAQ - General things related to our products

Beitrag von Karin » 03.12.2005, 19:02

These FAQ contain general questions and answers related to the our products. You can find more and specialised FAQs further down in this forum.

<a href="#01" target="_self">Only a € icon is displayed at the preview window.</a>
<a href="#02" target="_self">DVD authoring: The video resolution is invalid (non dvd compliant).</a>
<a href="#03" target="_self">Video and/or audio are too fast while performing (Mickey Mouse voices).</a>
<a href="#04" target="_self">In some recordings, the actors have got egg heads, but there is everything normal on the receiver. </a>
<a href="#05" target="_self">On DVD, video and audio gradually diverge and will become asynchronously.</a>

<a id="01"></a>:arrow: Only a € icon is displayed at the preview window.
This sign will be indicated if the edited recording comes from a Pay TV broadcasting station and is still encrypted. All such recordings can not be processed by our products.

Tip: The TF4000 and TF5000/TF5500 can decode these recordings subsequently by playing and simultaneously recording them again.

<a id="02"></a>:arrow: The video resolution is invalid (non dvd compliant).
This problem is caused by the broadcasting station. Our products do not change any data, but just pick out the video and audio packets from the data stream for further processing.
The DVB's horizontal resolution standard is 352, 480, 544, 704 or 720 pixels.
However, most DVD players will play non-compliant resolutions without any problems.
But many authoring tools refuse to accept such recordings, just to be on the secure side.
Taking remedial action can only another DVD authoring programme accepting non-compliant resolutions. Another possiblitiy is to simulate a compliant resolution to the authoring tool by using a DVD patcher and to patch back to the former values after the processing is finished.

<a id="03"></a>:arrow: Video and/or audio are too fast while performing (Mickey Mouse voices).
This is a problem of the DVD players respectively of the DVD standard. There exist separated audio packets for each channel in a recording with stereo audio. The player is informed at the beginning of a recording that it should match the packets with the right and the left data channel in turns.

In case the audio changes now within the recording from stereo to mono, the amount of the audio packets is reduced to the half. However, the DVD player will continue to distribute the oncoming packets using the same principle. Because the audio and video should stay synchronously, the player tries to adjust the audio packets which results in an audio falsification.
Since such audio format switchings often occur at the beginning of a record at the crossing of the trailers/advertising to the proper broadcasting, you can eliminate the mistake by setting the cuts at the beginning of the recording in a way that no audio format switchings will be taking place later on.

<a id="04"></a>:arrow: In some recordings, the actors have got egg heads, but there is everything normal on the receiver.

Cause 1:
There have been defined further graphic resolutions for DVB (Sat TV) contrary to the DVD standard.

Resolutions not enclosed in the DVD standard:
480x576, 544x576 (PAL) or 480x480, 544x480 (NTSC)

The following resolutions are covered by the DVD standard:
352x576, 720x576 and 704x576 (PAL) or 352x480, 720x480 and 704x480 (NTSC).

The resolution is set by the broadcasting station. We do not have any influence on this, because we take the data out of the MPEG transport stream unalteredly.

The receiver and various DVD players are able to perform such non conformable resolutions.
But some of them insist on the norm and just "bend" the existing format. The consequence: egg heads or pancake faces.

Solution 1:
Rendering the recording again with a MPEG encoder (i.e. TMPGenc). In doing so, the record will be decomposed into its individual images, altered and recombined to a MPEG program stream in a DVD conformable resolution.
This method takes a lot of time and results in quality losses, too.

Solution 2:
DVR-Studio Pro can add the so called "Add sequence Display Extension" for certain pioneer devices in order to point out to the DVD player which resolution is to be displayed. Therefore, you have to activate the option "Add sequence Display Extension" in the settings (at the menubar under "View | settings..."). Additionally, there has to be placed a short record in a DVD conformable resolution straight before the wanted recording (a black image lasting for one second is enough).

Cause 2:
Some broadcastings are transmitted in wide screen 16:9. However, the providers often broadcast trailers or advertising before in the format 4:3. The switching to the format 16:9 mostly happens in the broadcast's first seconds. If there is now a part still in format 4:3 burnt on DVD, the hardware DVD player will map the rest of the recording in the format 4:3, too. The consequence: the image's height will be extended!

So please take care that all parts in the format 4:3 are declared as cut areas and will therefore be removed before the burning process. DVR-Studio Pro always indicates the image format at the information area for the navigation slide bar's current position.

DVR-Studio Pro and DVR-Studio are able to look after a coherent video format themselves. That is what the option "Ensure same video format for entire recording (i.e. 16:9)" which is activated as standard at the settings menu (at the menubar under "View | settings...") is meant for. All the headers will be changed into the most often occurring video format then.

<a id="05"></a>:arrow: On DVD, video and audio gradually diverge and will become asynchronously.
In this case, a non-compliant DVD format is present. Some DVD players have a problem with that.
Explanation: Video and audio proceed in separate modules. If the player has trouble with the format, the concerned module will crash, but restart itself within milliseconds. However, these periods will steadily add up to a noticeable mismatch within playtime.
You can easily test if it is down to the player: Pause the DVD and click on "Play" again. In case the recording is now synchronously again, the format is to be blamed.
Activate the Pioneer or Toshiba Fix in our products under "View | Settings". These tools may align the recording with the DVB default again. More information about this is to be found in our products' manuals to call up by clicking on F1.
Generally, we can not solve this problem. Some players are just useless at this. The experience shows that particularly high-quality players cause problems, whereas simple, low-cost players can almost always handle non-DVB-compliant recordings.

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