miroVIDEO DC10 
README for Version 1.05					   11/27/1996

This text contains important information for the miroVIDEO DC10 user.
If you encounter any problems when working with the miroVIDEO DC10,
please read the manual and this text.

Very important: 
Contrary to the description of fast decompress for playback made in the
miroVIDEO DC10 manual, this fast decompress function is not implemented 
in this software release. This means that in the DC10 CTRL program, 
the "Window (accelerated)" option is not yet available. 
This function will be implemented in the next driver version.


Contents

1.0   	Installation miroVIDEO DC10
1.0.1  	Before you start the installation
1.0.2 	Configurationtest miroVIDEO DC10
1.1    	Installation of the miroVIDEO DC10 with Windows 95 Service Release 2
1.2    	Direct Video and miroVIDEO DC10
1.3    	Installation of miroVIDEO DC10 and S3 graphics boards with 868, 968
1.4    	Video overlay
1.4.1  	Video overlay support for miroMEDIA View and miroMEDIA 3D
1.4.2  	Video Overlay support in general
1.5    	Changing the resolution during capturing with active video overlay 
1.6    	Video overlay and playback
1.6.1  	Video overlay during playback with miro graphics boards
1.6.2  	Video overlay during playback in general
1.7    	Interrupt Sharing
1.8    	System.ini entries after the installation
1.9    	Capturing and playback AVI sequences
1.10   	Jerks during playback
1.11   	Hard disks
1.11.1 	Enhanced-IDE hard disks
1.12   	VidCap32
1.12.1 	VidCap32 for Windows 95
1.12.2 	VidCap32 and NTSC Standard
1.12.3 	VidCap32 and MediaPlayer
1.12.4 	Known bugs
1.13   	miroVIDEO DC10 and Pentium Pro

2.0    	miroVIDEO DC10 & Ulead Media Studio
2.1    	Known bugs

3.0    	miroVIDEO DC10 and Video Mouse

4.0    	miroDigital Video MJPG Player

5.0    	Changes to last driver versions

6.0    	miro services





1.0   Installation miroVIDEO DC10

1.0.1 Before you start the installation 
Before you start the installation of the miroVIDEO DC10, make sure that
an already installed video device, for instance miroVIDEO DC1, miroVIDEO DC20
or competitor models should, be removed.

!!! Attention: Driver errors may occur !!!

Either more than one capture board has been installed in your computer,
or you remove a capture board from your computer but not from the Control
Panel. For more information, please read the "Hardware installation" section
in your User's Guide.

If you removed a miro capture board from your computer and have problems
with the capture driver, start the [CD drive]:\tools\miraser.exe program.
This is required to ensure that miroVIDEO DC30 can be installed correctly in 
your system.
This program searches the Registry for miroVIDEO DC1, miroVIDEO DC10,
miroVIDEO DC20, and miroVIDEO DC30 entries and removes some entries, if
necessary.

To ensure that your miroVIDEO DC10 board can be installed correctly
in your computer, restart the computer now!


1.0.2 Configuration test miroVIDEO DC10
After a successful installation of the miroVIDEO DC10 sofware the configu-
ration test will start automatically. If you get an error message during
this test, please shut down Windows 95 and restart your system. Then, start
the program "Configuration miroVIDEO DC10" located in the miroVIDEO DC10
folder and click the "Test" button. The configuration test will run once
again.


1.1 Installation of the miroVIDEO DC10 with Windows 95 Service Release 2
Recommendation:
Before you install the miroVIDEO DC10 hardware in your system, please first
start the setup programm out of the setup directory of the delivered
miroVIDEO DC10 CD-ROM. 

Known bugs:
The playback of MJPG compressed AVI files out of the Explorer only appears in
a window. A video output to TV is not possible. Please use the MediaPlayer
for playback your AVI files to TV.


1.2 Direct Video and miroVIDEO DC10
If you have installed "Direct Video" on your computer and you like to playback
an AVI movie with the Media Player to TV, you have to start DC10CTRL
before starting the Media Player, otherwise you only get a preview and no
output to video or TV.


1.3 Installation of miroVIDEO DC10 and S3 graphics boards with 868, 968
If you have installed a graphics board with S3 chip 868, or 968, please make 
sure that this graphics board really uses a 64MB memory area. You can check 
this in the Device Manager of Windows 95. Computers with older AWARD BIOS 
report only a 32MB memory area back to the Device Manager.
As soon as you like to install another device which memory area is located 
directly behind the memory area of the graphics board the system can hang up, 
because the memory areas overlap.

Solutions: 
	- Update of the AWARD BIOS
	- Change the memeory area of your graphics board in the Devive Manager



1.4   Video overlay

1.4.1 Video overlay support for miroMEDIA View and miroMEDIA 3D
The video overlay functionality for the graphics boards mentioned above 
will be implemented in the latest Windows 95 driver versions for this boards. 
These Windows 95 drivers support the Video Overlay Surface function. 
With this function a video overlay is possible during capturing.

1.4.2 Video Overlay support in general
In general, state-of-the-art PCI graphics adapters with S3 Trio 64V+ or 
S3 Virge graphic processors are able to support a PCI overlay. 
Some manufacturers don't support this function in their Windows 95 drivers. 
You can easily check if your graphics board supports this function 
by opening the "VIDEO DC10 Configuration" program and click the "Test" button.
If you notice any disturbances in the overlay windows during capturing,change
the overlay scaling in VidCap32 in the "Options" menu and and switch Video
Display into the next smaller level. In doubt, select the "Small resolution"
option for the overlay scaling. This should fix the disturbances in the video
overlay windows.


1.5 Changing the resolution during capturing with active video overlay 
Avoid changing the resolution during capturing AVI files with activated
video overlay. The video overlay can be enabled in VidCap32 or in the
Media Studio capture program.


1.6   Video overlay and playback

1.6.1 Video overlay during playback with miro graphics boards
With the miroVIDEO 20TD live, the miroMEDIA TV and the miroMEDIA 3D boards, 
a video overlay during playback AVI files can be realized on the computer
monitor. Therefore you have to connect the composite input of miroVIDEO 20TD
live, or the composite input (S-VHS -> composite adapter) of the miroMEDIA TV
with the composite output of the miroVIDEO DC10. After this please start
the miroTV application. 
You can connect the miroMEDIA 3D board via an S-VHS cable to the S-VHS output
of the miroVIDEO DC10. Then start the miroTELEVISION application.

Hint: If you loop through the a video signal to the miroVIDEO DC10, please watch that
the S-VHS output of the miroVIDEO DC10 only has a S-VHS signal if a S-VHS source is
connected to the input of the miroVIDEO DC10 !!! You can't convert a composite signal
into a S-VHS signal with the miroVIDEO DC10.

                                           
1.6.2 Video overlay during playback in general
If you installed a graphics board in your computer, which can also display 
a video overlay, connect the video input of the graphics board(Composite or
S-VHS) to the miroVIDEO DC10 composite output and start the Video Overlay
application of the manufacturer of your graphics board.


1.7 Interrupt Sharing
This miroVIDEO DC10 version supports PCI interrupt sharing. This function is 
necessary if the motherboard allocates a single interrupt to all PCI slots. 
In this case, all PCI devices have to share one interrupt which means that 
every driver has to check if the current interrupt comes from its device. 
If this is not the case, the driver must not handle this interrupt and has to 
pass it to the next PCI device. If only one of the devices involved (or its 
driver) fails to do so, the system will not function properly. Because the 
devices which are mostly used for recording and playing back video are SCSI 
hard disks and SCSI controllers, we test the behaviour of SCSI controllers.
Under Windows95, we tested miroVIDEO DC10 together with Adaptec SCSI 
controllers and the Adaptec driver software EZ-SCSI 4.0. This combination
works without any problems.


1.8 System.ini entry after the installation
After successful installation of the miroVIDEO DC10 you should find the follo-
wing entry in the system.ini in the section "drivers":

VIDC.MJPG=DC30CDC.DRV


1.9 Capturing and playback of AVI sequences
If you like to capture and playback AVI files with audio, you need a sound 
device in your system. In case you already have installed a sound device in 
your system you can capture and playback audio data too. The miroVIDEO DC10 
is only a video device because it has no audio chip. 


1.10 Jerks during playback
We redesigned our miroVIDEO DC10 driver for video playback. Now every frame
will be marked with an internal time code. Because the captured frames will
be buffered, there are no problems to digitize more frames than your hard
disk can write but during playback problems may occur. As yet, frames will
be dropped if the hard disk cannot achieve the selected data rate. 
Now with the internal time code, every frame has to be played back up to 
a defined point in time. In case the hard disk cannot achieve the 
selected data rate, you get jerks because some frames will be dropped for 
keeping the selected datarate.

Solution:
 - if you have plenty of RAM memory in your system, you can disable the
   virtual memory of your Windows 95.
 - insert the following lines in your system.ini below the section [vcache]:
   MinFileCache=4096
   MaxFileCache=4096
   Both values should be equal and about 25% of the main memory.
   i.e  for a system with 16MB you should use a value of 4MB (4096KB).

 - otherwise you should reduce your selected data rate during capturing.

Hints:
1. During playing back AVI movies using the Media Player or Media Studio
at a high resolution, with two fields and a high data rate, few frames 
are jerky and jittering during the startup of the playback.
First, the frames will be loaded into an internal cache memory, before they
can be played back with the Media Player. For playing back an AVI movie to
a VCR we recommend to insert a short trailer of about a few seconds before
the movie starts, or to use the miroAVI Cache with the "synchronized start"
option enabled.

2.AVI files, captured with Vidcap32 or another capture program mostly have a
worse interleave factor between the video and audio blocks, ths means that 
first a number of video blocks and then the audio blocks are located in the 
file. This could cause jerks during playback.
This worse interleave factor you can change with Ulead Media Studio by
calculating the AVI file once again with the "Create Videofile" function. The
resoluton and data rate should be kept, but in the output options make sure
that the setting for "Audio Blocks" is set to "1Frame". 

1.11 Hard disks
Windows 95 supports the 32-bit access to hard disks. Please check in 
Control Panel/System/Device Manager, if your hard disk drive or your SCSI
controller has been detected by Windows95 correctly. If not, the data transfer
rate of your hard disk will not suffice for a satisfying quality when
recording and playing back video.

We recommend to install a second hard disk to save the complete video clips 
for recording. You can save temporary files to your system hard disk. During
recording and playing back, Windows 95 accesses system files. If these files
are located on the same hard disk as the video clips, the head has to be
repositioned which leads to one or more dropped frames (unsmooth playback).
Even the internal miroVIDEO DC10 cache cannot avoid this if the hard disk is
used at the peak performance.

1.11.1 Enhanced-IDE hard disks
With some E-IDE hard disks, high data rates result in an unsmooth playback
when playing back AVI files because the hard disk is recalibrated while a
file is read. This is no problem of miroVIDEO DC10 but is due to the
functionality of your hard disk and the other system components. This
miroVIDEO DC10 driver version will eliminate these unsmooth "jerks". 
If you got a disk with special busmaster drivers with your hard disk, please
install these drivers in your system, because the disk performance will
raise considerable.


1.12   VidCap32

1.12.1 VidCap32 for Windows 95
For using the miroVIDEO DC10 under Windows 95 we recommend Microsoft VidCap32 
for capturing AVI files. VidCap32 will be copied during the installation of the
miroVIDEO DC10. VidCap32 fully supports the 32Bit capture-class, so that you
can reach higher data rates during capturing. Check in the VidCap32 menu
"Edit| Preferences| video and audio synchronisation" if the option "sync video
to audio" is enabled.

1.12.2 VidCap32 and NTSC Standard
Before capturing NTSC movies with VidCap32 you should set the "frame rate"
in the Capture/Video menu exactly to 29.97 frames/s and not 30 frames/s !!!

1.12.3 VidCap32 and MediaPlayer
We don't recommend to start VidCap32 or any other video capture program during
the playback of AVI files with the miroVIDEO DC10 and the Media Player. 
miroVIDEO DC10 does not allow to capture and play back AVI files simultaneously.

1.12.4 Known bugs
By default, VidCap32 sets the capture file to C:\CAPTURE.AVI. If you like to 
select another drive for capturing, it could happen that VidCap32 stops with 
a General Protection Fault (GPF). Start VidCap32 once again, ignore 
the error message that the device is already active and set the desired
drive for capturing. Close VidCap32 now and restart Windows 95.

VidCap32 supports the overlay functionality of miroMEDIA View and miroMEDIA 3D 
under Windows 95, this means that you can switch between the preview and 
the overlay modes and you don't have to connect a TV set miroVIDEO DC10
output. Avoid minimizing VidCap32 to an icon if you are in the 
overlay mode because this could cause a GPF. If you want to minimize 
VidCap32 so that this application will appear in the status line, please 
switch into the preview mode first.

Always check the audio setting of VidCap32 before you start capturing, because
older versions of VidCap32 doesn't save this settings.

In case you start capturing with VidCap32 and you get an error message "not 
enough memory for audio buffer available", first close all applications working 
in the background and start capturing again. In case this does not solve the 
problem change the audio settings in VidCap32 to increase the audio data rate.
If these changes are not successful, please restart your system.

A German or French help file for the VidCap32.exe doesn't exist. If you try to
open the "Help" option in the VidCap32 you only get the English help.


1.13 miroVIDEO DC30 and Pentium Pro
At the moment there is a playback problem on Pentium Pro computers with Natoma
chipset in combination with miroVIDEO DC10. miro is working on a workaround for 
this. In the next driver relase this bug will be fixed probably. 



2.0 miroVIDEO DC10 & Ulead Media Studio

2.1 Known bugs
If you like to resample an AVI movie in Ulead media Studio, please check that
the horizontal image size has an even number of pixels, otherwise you get a
color mismatch on the TV output, or in the video overlay. This bug is not
visible in the preview.




3.0 miroVIDEO DC10 and Video Mouse
The miroVIDEO DC10 won't be supported by the WinEdit software of the Video 
Mouse. It is not planned to implement this as yet.



4.0 miroAVI Cache
Common:
miroAVI Cache is a MCI based driver which can be used by the Media Player of 
Windows 95. miroAVI Cache makes it possible to playback AVI-movies in MJPG-
format. These files could be created i.e. with a miroVIDEO DC10, miroVIDEO DC20 
and the miroVIDEO DC30.

To ensure a non-jerky playback even at high data rates, the video and audio data
are buffered in the memory (cached). When the hard disk interrupts its operation 
(i.e. during swapping), the video clip will be temporarily taken from the memory.
If necessary, you can adjust the cache size using miroVIDEO DC30 Control.

Installation:
During the installation of the miroVIDEO DC10 the miroAVI Cache will be copied 
automatically into the Windows\System subdirectory. To use the miroAVI Cache, 
select "miroAVI Cache (MJPG)" in the device menu of the Media Player 
instead of "Video for Windows". Then a file selection window appears. 
Please make sure that you set the video output options either to 
composite video or to S-video in the miroVIDEO DC10 control.
At the time, miroAVI Cache does not support the video output in a window.

Settings:
With the miroVIDEO DC10 Control the size of the cache for video and audio 
data can be changed. Therefore please start miroVIDEO DC10 Control and 
click the "AVI Cache" button. Now you can set the desired cache size in the 
field "Video Buffer" in frames between 6 and 128. The changes of the buffer
number take effect the next time the AVI is loaded. If the driver has to
increase the buffer number, the number will be reset as soon as a new AVI
file will be loaded or the Media Player will be closed. This is only the
case, if the user has not changed the buffer number in the meantime.
By clicking the default button the value can be set to default, which will
be sufficient for most of the applications.
Please remember that a large cache size needs a high amount of memory and 
especially on systems with low memory the system performance will go down.
A hint at the bottom of miroVIDEO DC10 Control specifies the approximate 
required cache size for a data rate of 3MB per second.


6.0 Changes to the last driver versions

Version 1.03

-supporting SECAM,PAL-N and PAL-M output
-supporting an alpha version of the miroAVI.drv 
-GPF fixed, if no miroVIDEO DC10 is installed and DC30CTRL will be started
-The application VIDEO CRAFT works with the miroVIDEO DC10 now
-general changes to make sure the playback of AVI files 


Version 1.05

-miroAVI Cache implemented
-miroVIDEO Expert will be delivered too
-miroVIDEO DC10 adaptions
-fixed: 20ms difference between audio and video during capturing with only
 one single field
-Correction of the automatic pixelratio adaption to get an video output of most 
 of the formats which are not in an 4:3 format.
-fixed: flickering videooutput, using graphics boards which are not PCI conform
-new VidCap32 which saves the audio settings will be delivered now




6.0 miro services
For new miroVIDEO DC10 drivers or driver updates please look at the following 
services:

miroMAILBOX:            +49 531 2113-112
Internet:               ftp.miro.com
			http://www.miro.com
CompuServe:		GO MIRO


