The "Capture settings" dialog

This page describes the "Capture settings" dialog in detail.

This dialog consists of four areas. The "Capture settings" the "Audio settings" the "File settings" and the list area which shows the harddiscs/partitions to use.

The fields in the "Capture settings" area have the following meaning:

Frames per Second

Enter here the frame rate AVI-IO should use for the capture. NOTE! AVI-IO allows any value here, however it's not said that the under laying capture hardware will support it! Consult your hardware manual for possible settings. If the hardware generates frames, AVI-IO forces them to keep the rate you defined here. The standard frame rates for NTSC video are 29.97 (NOT 30!!) and for PAL 25 fps.

detect signal drop after # of drops

AVI-IO's signal drop detection feature is so far unique over all capture programs known to us. Bad or old footage results in a bad or unstable signal from the video source. It's a known problem that capture programs (actually the underlying Windows) can get into a "stalling" state where only audio is captured but no more video at all. AVI-IO is capable of detecting this state and will automatically re-initialize the under laying systems. Like this it's possible to capture unattended and without problems very problematic footage. Enter here the number of frames missing in a row which AVI-IO should consider as a complete signal drop out. In case you enter '0' the feature is turned off. Note that in case you use software compression it's advisable to enter a relatively higher value here (say 20) whereas with hardware compression support the value can be as low as 5 frames.

allow capture to resume

If this checkbox is in it's checked state, then AVI-IO asks you after a capture if it should continue or abort. This gives you the possibility to "skip" part's of your input without setting up a new capture cycle. It was introduced to allow you to skip commercials while capturing from broadcasts, or to capture only those parts of a tape you want to capture. It somehow "replaces" the batch capture functionality in that you can use the previewing of your footage where you otherwise would note the in and out points to capture directly what you need.

status line on top

If this checkbox is in it's checked state, then AVI-IO displays the status line below the menu bar. If this checkbox is unchecked, the status line is displayed at the bottom of the window. This helps if you capture full sized frames with a desktop resolution of 800x600 pixels.

Matrox YUY2 -> force Keyflag's

If this checkbox is in it's checked state, then AVI-IO stores every frame flagged as Keyframe. This is to overcome a bug in the patched Matrox driver with YUY2 format captures. Note, this option is ONLY to solve this specific case and does not help in any other cases. In fact, setting it might create an avi file which is unuseable

Capture Time limit

If the checkbox is in it's checked state, you can define how long the capture should last. If you don't limit the capture, AVI-IO will record video until your HD's capacity is reached or the configured maximum capacity is reached or the capture went on for 18 hours whichever comes first. Note, that you can also limit timed captures by defining timers as described under "Timer settings".

Custom Framesize

If the checkbox is in it's checked state, you can define a custom framesize. This allows you to capture with resolutions not directly supported by the capture driver and is a very handy help to capture to VCD or SVCD sizes. Note, if this feature works or not is depending on the capture driver. It's likely to work with brooktree based TV tuner boards. It does aparently not work with the popular DCxx familly of boards. Also note, that in case you had turned on a custom frame size, and uncheck the box, the custom framesize remains active until you choose a new video format under "Video Settings". Chooseing a video format always set's the framesize first to the size of the driver and thus you have to manually re-enter it here.

Free Capture Window

If the checkbox is in it's checked state, you can watch the video on screen in a different size than you capture. This is handy to watch a movi while you are capturing it, or to have a better view of what you capture in case you capture small format's for web streaming etc.

Freeze GUI during capture

If the checkbox is in it's checked state, AVI-IO does no longer respond to requests from Windows to repaint it's windows or any other things. This might helps to further reduce drops during capture. Note, if this setting is active, the capture must be terminated by hitting ESC.

Start Messagebox

If the checkbox is in it's checked state, AVI-IO prompt's you with a start message box before the capture process beginns. While this is handy for very preciesly timed captures, it's most of the time unnecessary. By unchecking the checkbox, the messagebox is supressed.

The fields in the "Audio settings" area have the following meaning:

Record Audio

If the checkbox is in it's checked state, AVI-IO will record audio together with video. If it's unchecked only video will be recorded.

VU meter

If the checkbox is in it's checked state, AVI-IO display a VU meter on the left and right side of the video frames which correspond to the left and right stereo channel respectively. In case of mono, both VU indicator bars move in parallel. Note, that this settings affects capture AND playback.

peek delay

Enter here the number of seconds a measured peek value should be kept. The VU meter displays the peek value with a little red bar. In case you enter '0', the peek value remains always on it's top most position. This gives you the option to assure that the audio level never goes above a certain level. In case you set it to any other value, the peek value remains valid for the duration you specify here and after this goes down to the current peek value.

The fields in the "File settings" area have the following meaning:

Maximum Filesize in MB

Here you define the maximum file size of each avi file created by AVI-IO. NOTE! The maximum of the fully enabled version is 4GB and AVI-IO WILL in all cases create a valid avi file of that size. However, if the video software you are using is not capable of dealing with files of that size, then it may tell you that the files are invalid which is the standard behavior in such cases. However, AVI-IO's player part will play back such files without any problems.

Audio interleave in milliseconds

This setting allows you to define after how many milliseconds an audio block should be inserted into the video stream. Valid values are between 100 and 500. We recommend to use a setting of 500 ms. According to our tests this gives the best performance with playback. The value here may give different results on your system, so you may need to experiment what's best for your specific setup.

Assign Sessionnumbers

Normally AVI-IO creates files with a naming scheme like "xxxxxxxx.99.avi". If you start another capture, AVI-IO would prompt you if it's ok to delete the files. In case you want to capture in several steps, you can check this checkbox. If you do so, AVI-IO creates files with a naming scheme like "xxxxxxxx.999.99.avi". where the first 999 represent's the session number. You can define the starting session number. Note that it's important to configure Session numbering in case you want to capture unatended with more than one timed event.

use 8.3 filenaming

Normally AVI-IO creates files with a naming scheme like "xxxxxxxx.99.avi". Such files cannot be processed by older 16 bit software. By checking this checkbox, AVI-IO creates filenames with one fewer dot. However, it's up to your responsibility to enter a base filename which does not exceed six characters in length.

align to disc sector

This setting allows you to define that the frames should be aligned to disc sectors. This allows AVI-IO to further optimize it's output and is the same setting Video for Windows is using with high performance capture devices. In case you don't set this checkbox, AVI-IO uses a much slower kind of I/O and does not create what's called alignement chunks.

insert drops as full frames

If a drop appears, Windows usually stores it as an instruction to repeat the last frame. However certain programs don't seem to support this correctly. This option was created to overcome this bug. It's use is strongly discouraged if not needed for this purpose because inserting drops as full frames may lead to even more drops if the HD performance was the reason for the drop.

The "list area" shows the harddiscs/partitions that AVI-IO should use. AVI-IO is capable of capturing over up to 24 harddiscs/partitions in ONE STEP. You can double click on a entry to modify it or select an entry if you want to modify, append or insert a harddisc/partition below or before that entry or delete it (See the "Add/Modify Disc" dialog to learn what options you have per harddisc/partition).

Modify Disc...

This button allows you to modify the highlighted disc/partition.

Insert Disc...

This button allows you to insert a disc/partition BEFORE the highlighted entry.

Append Disc...

This button allows you to insert a disc/partition BELOW the highlighted entry.

Remove Disc...

This button allows you to remove the highlighted disc/partition.

Back to The "File" menu