1. v10121.exe Driver
2. README.TXT File Contents

README.TXT Driver File Contents (v10121.exe)

miroVIDEO DC10 
README for Version 1.21					   08/25/1997

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.

Further informations, tips and help you can get out of the miroVIDEO DC10
informations now.

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. 

Contents

1.0   	Installation miroVIDEO DC10
1.0.1  	Before you start the installation
1.0.1.1	Driver update for miroVIDEO DC10
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 the following miro graphics boards
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
1.7    	Interrupt Sharing
1.8    	System.ini entries after the installation
1.9    	Capturing and playback AVI sequences
1.10   	Jerks during playback
1.11	miroVIDEO DC10 and Pentium Pro / Pentium II

2.0    	miroVIDEO DC10 & Ulead Media Studio
2.1    	Known bugs

3.0	miroVIDEO DC10 and PowerGoo

4.0    	miroAVI Cache

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 DC10 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:
First plug in your miroVIDEO DC10 hardware in your system. After this startup
your Windows 95 and do the driver installation via miroDC10.INF file 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
There are two different ways to display a video overlay on the computer screen. 
As yet, the overlay has been realized via the overlay surface, meaning that 
the video signal is transferred as YUV into the offscreen of the graphics board 
via busmaster.
The offscreen area is the memory area of the graphics board which is not displayed 
on the monitor. From this offscreen area, the video overlay is transferred to the 
visible onscreen area of the graphics board and displayed on the monitor. 
Depending on the graphics board´s performance, the overlay image can be 
increased/decreased in size.
The Microsoft PC97 specification only includes Overlay Surface. Thus, Microsoft 
only supports the Overlay Surface.
  
As of the driver version V.1.21, miroVIDEO DC10 also supports Primary Overlay. 
In contrast to the Overlay Surface, the Primary Overlay transfers the video 
signal directly to the onscreen area of the graphics board. It will be displayed 
in its original size in RGB on the monitor. In this case, YUV is converted to RGB
via the miroVIDEO DC10. The Primary Overlay only works at a color depth of 16 bits
or higher because at a color depth of 8 bits a color palette is used which is not 
applicable to the Primary Overlay. 

Because of the reason mentioned above, the Primary Overlay does not work at a color
depth of 8 bits !!!
Please note that at a color depth of 32 bits the double amount of overlay data will be
transferred via the PCI bus than at 16 bits. 

In addition, at the Primary Overlay only one field of the video signal is displayed
up to a maximum size of 384 pixels in X direction and 288 pixels in the Y direction. 
You can, however, decrease the overlay in size. The Primary Overlay is limited to the 
(quarter) size of 384 x 288 pixels to keep the load on the bus as low as possible.
The Primary Overlay should work with all PCI graphics boards (with some exceptions)
whose Direct Draw driver does not support an overlay surface function or which do not
support Overlay Surface at a higher resolution and color depth.

1.4.1 Video overlay support for the following miro graphics boards

	miroMEDIA View 
	miroMEDIA 3D
	miroVIDEO 22SD
	miroCRYSTAL 3D
	miroCRYSTAL VR 2000/4000

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 was only possible during capturing.
Since driver version V.1.11 it is possible to get a video overlay windows during 
playback AVI files on the Windows desktop on condition that the graphics board 
will be supported  with a Direct Draw driver, which supports the overlay surface 
function. This means if you alreday get a video overlay during the capture, you 
will get a video overlay during playback too.

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 window 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.
Since driver version V.1.11 it is possible to get a video overlay windows during 
playback AVI files on the Windows desktop on condition that the graphics board 
will be supported  with a Direct Draw driver, which supports the overlay surface 
function. This means if you alreday get a video overlay during the capture, you 
will get a video overlay during playback too.


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.
Since driver version V.1.11 it is possible to get a video overlay windows during 
playback AVI files on the Windows desktop on condition that the graphics board 
will be supported with a Direct Draw driver, which supports the overlay surface 
function. This means if you alreday get a video overlay during the capture, you 
will get a video overlay during playback too.

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.
                                          
1.7 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" and "mci":

[drivers]
VIDC.MJPG=misiCDC.DRV

[mci]
AVIVideo1=miroAVI.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 "1 Frame". 

1.11 miroVIDEO DC10 and Pentium Pro / Pentium II
In case you are using a Pentium Pro system with the Natome chipset,please insert 
the following lines in your win.ini:

[miroDC30]
Natoma=1

Note: As of the miroVIDEO DC10 driver version V.1.21 this entry is set automatically,
if you confirmed the question asking you whether you are using a Pentium Pro.



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.

In case your graphics board supports only a primary overlay, please watch that
the primary overlay is not visible after capturing an AVI file the first time 
in the Video Capture application. After restarting the Media Studio Video Capture
application the primary overlay is visible again.


3.0 miroVIDEO DC10 and PowerGoo
Recommendation:
You edited an image in Kai's Powergoo SE and want to save this as AVI
file. Click "Export AVI Animation", enter a name instead of "untitled.avi".
After pressing the "Save" button another window opens where you can select
a compression mode. Please keep the default setting "Full Size Frame 
(uncompressed)" and save this AVI file without compression.


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.


5.0 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

Version  1.11

-Video overlay during playback of AVI files only with graphics boards, which
 supports the "Overlay Surface" function in Direct Draw.
-Automatic scaling of the video overlay if overlay window will be drawn to 
 one border of the Windows 95 desktop
-miroAVI Cache expanded to 32 bit and playback behavior essential improved
-miroAVI Cache can be selected as primary driver in the miroVIDEO DC10 Control
-miroAVI Cache can be used for playback in Media Studio now
-miroVIDEO DC30 Installation program video standards PAL/NTSC/SECAM selectable
-miro logo can be displayed during capture and playback. Default is off
-complete deinstallation of all drivers and registry entries
-miroAVI converter will be added during installation
-Help database "miroVIDEO DC30 informations" will be added during installation
-fixed: error during playback of AVI files on Pentium Pro systems Natoma chipset
-fixed: hangups on machines with VIA chipset 
-fixed: GPF during Installation of Games (Hellbender)

Version 1.21
-new: Primary Overlay added
-new: Video loop through Composite IN -> S-Video OUT (Composite signal) enabled
-new: Default miroVIDEO DC10 Video Settings optimized
-new: Default miroVIDEO DC10 Control set to AUTOMATIC ADAPTION
-fixed: Video Format Data rate selection dispay error
-fixed: Crash by leaving Windows while M-JPEG AVI is playing


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