Test presets

This command opens the Tests Settings dialog.

 

Here you can create or modify Test presets. Each test preset acts like a template for performing file verification: it contains a list of test plug-ins and a set of parameters, defined for each plug-in. Each plug-in keeps track of different Parameters. A set of Values may correspond to each Parameter.

To Add/Delete/Delete All/Clone or Set as Default a Test preset, right-click within the Test Presets area.

In the Default preset field you can see which test preset which is currently set as default. It will appear automatically when you specify a source directory for file verification.

 

After creating a Test Preset, select it by a single left-click over it. From the All available plugins field to the right side of the window, select each plug-in you would like to be used for performing the file verification. Currently, we support several plugins.

 

At the lower part of the screen, you can see separate Parameters as well as the Values, corresponding to them. They can be changed according to your requirements and needs.

NOTE: The currently defined values are perfectly suitable for use in television quality control. Be aware that if you change these values we do NOT guarantee appropriate results.

Once a test preset is defined and performed over a set of files, a metadata (*.mtd) file is sent to X-Pert Playout. Thus, if X-Pert Playout is properly configured for quality control of its playlist files, it uses the above mentioned file and interprets the data in it in order to verify that the respective items have or have not passed the quality check.

In the fields in the right part of the Tests Settings dialog you can configure some additional parameters.

The Allowed stream duration deviations field is used for comparing the file duration that is written in the metadata file with the playout duration. By default, X-Pert Quality Check allows for  500 ms but you can enter different values here, in Shorter and Longer duration respectively.

Use the On Missing Stream(s) field to tell X-Pert Quality Check what to do when it cannot find one or more streams in a given file. Note that each file is accompanied with a number of streams that it contains for audio and video compressions. Thus, the program checks for the presence of each of the streams that are listed to exist within a file. If a stream is not found, X-Pert Quality Check allows you to do one of three things:

Return a result of 0 %

Return a result of 100 %

Check the existing streams and calculate the result by subtracting the respective portion of the file (stream(s)) that is / are missing

 

In the On Missing Media Info field you can tell X-Pert Quality Check how to act when media info is missing from a certain file. It can send a result of 0 or 100 %.

The calculation of the result (Success %) is described in details in the dedicated Appendix.

Be aware that X-Pert Quality Check stores information for files that have already been checked with a certain Test preset. These files are recognized by their name and X-Pert Quality Check verifies if the files checked are the same (i.e., the file is not a different one but with the same name) by checking its size in bytes. Thus, if for any reason you are uncertain if the files that have already been checked correspond to the currently checked files, place a check in the Calculate CRC box and X-Pert Quality Check will compare the size of the previously tested and the currently tested file. For more accurate results you can use the Force Calculation box.

 

 NOTE: However, you should note that this will slow down the quality check process.

 

Below you can see a list of the currently available test plugins, together with their description:

 

Loudness Measurements – Audio

 

Missing Media Samples – Audio / Video

 

Color Frames Detection – Video

 

Frozen Frames Detection – Video