AMCap Frequently Asked Questions
I created this page to answer some of the questions that I am regularly
asked about my custom version of
AMCap. In case of problem, always make sure that you are using the very
latest version available from my website.
1. I captured a video using AMCap but
when I try to process it in RegiStax I get a "Failed to decompress AVI
frame" message. Is it possible to capture uncompressed video with AMCap?
This message is not directly related to AMCap. By default AMCap
captures uncompressed video. This message usually means that the .avi
file is too large and exceeds 1GB in size. In RegiStax, try to uncheck
as many frames as needed from the end of the list and try again or use
Windows Movie Maker or another video editor to trim the file. Please
if you need further assistance with this program.
2. I cannot get my
webcam to work. When I enable preview, I get
either a green or a black screen
or one of the following messages
"Sorry, you have no video capture hardware." or "Unable to add the video capture source to the filtergraph". How do I get my webcam to
As usual, there may be a lot of reasons including the worse one, a
failing device. On the other hand, you can often fix such an issue with
one or more of the following steps:
- first off make sure that your computer and Windows meet the
requirements of your webcam (see the user manual or the manufacturer's
- if your capture device features many inputs make sure that the
correct input is selected in the Options >
Crossbar Video Input menu.
- otherwise, unplug your webcam, reboot your system, plug your webcam and try
- unplug all other USB devices connected to your PC and try again. If
that works, plug back the USB devices one by one to identify which one
- unplug your webcam and fully uninstall the current drivers from
Control Panel > Add or Remove Programs icon. Reboot your
system then try to reinstall the drivers. Only plug the webcam after
installation is complete and possibly rebooting (but if told to do
- check whether new drivers are available for your webcam on the
manufacturer's website and possibly install them.
- try my
assistant and see what errors (if any) are reported.
- Vista RTM users only: you may have to apply a
Microsoft Hotfix described in article ID 939331 in case your system stops responding.
For issues related to preview, you may also try to:
- install the latest DirectX runtime from
- install the latest version of the drivers of your graphic card
available on the manufacturer's website
3. When I make captures there is no
sound recorded. How do I enable audio capture?
Here are the most common options and features to configure:
- click the Devices menu and make sure a sound card or a
webcam microphone is ticked
- in Capture menu, tick Capture Audio
In the system:
- double-click the Volume icon near the clock on the taskbar
(the icon looks like a speaker, it may be hidden in that case you
have to enabled it from the Control Panel)
- in Volume Control applet, click Options >
- select the Mixer device if you have many
- click Recording
- make sure Microphone or Line In (or any other audio
input from which you want to capture) is ticked
- click OK
- in Recording Control applet, tick the Select box of
the audio input from which you want to capture audio
- adjust the Volume level of that input
4. The preview is mirrored or
flipped. How do I fix this?
This is either due to the chosen Color Space / Compression or an issue
with the driver of the video capture source. You can try the following
- click Options > Video Capture Pin... and choose
another Color Space / Compression
- Try to reinstall the drivers of your video capture source (possibly
your graphic card)
- install the latest version of the drivers of the video capture
source from the manufacturer's website
Alternatively, you may use the View > Flip View menu.
5. There is no sound at all during
the preview. How do I fix this?
First make sure that the right audio device is ticked in the Devices menu.
If a Devices > Capture audio from video
source menu is available, click it otherwise click the Options
> Audio Capture Filter... menu and follow these steps:
- Under Pin Line, select the appropriate input (if there are
many) then tick Enable
- Adjust the volume with the Pin Line Input Mix slider
- Click OK to apply the new settings
Note: you can also adjust the audio properties from the Volume
applet (in the notification area, formerly the system tray) Options >
Properties menu > Recording option (see
6. When I enable
video preview, I get an error "0x80070057"? What does that mean?
The error code simply means invalid parameter. It does not give
much clue about what actually fails. This can be due to the capture driver or the
graphic drivers or an incompatibility in the current settings. Try these few
- first restart your system and make a new test, if the problem persists
try the other steps below.
- clear Options > MPEG-2 if your capture source is not
- select the Default video renderer in Capture > Setup... menu >
Try again. If the problem persists, visit the websites of the
manufacturers of both your capture source and your display card and check if
updated drivers are available. If some new drivers are available, restart
your system and try to install them.
If you are not using the latest update of DirectX, you may also consider
installing it from
7. I get an error (possibly
0x80070057) when I click View > Flip View > Flip, Mirror or Rotate and the
view is not flipped or mirrored? What can I do to flip the view?
The error code simply means invalid (or unsupported) parameter.
The driver of your video source may not support flipping and mirroring, this
is not a required feature. Try using a Video
Mixing Renderer as the video renderer in
Capture > Setup... menu, Options tab.
8. What is VMR9 and what are the
VMR9 means Video Mixing Renderer version 9. It is an optimized and
enhanced video renderer provided with DirectX 9.0 and later. If the option
is grayed out in the View menu, you need to install the latest
DirectX 9.0 runtime available from the
Microsoft Update website.
9. The files I captured do not play
after a certain size on my Windows 98 system. What are the file size limits?
The file size limit does not only depend on the installed Windows system
but also on the file system which is either FAT16, FAT32 or NTFS. The size
may also be limited by the underlying capture technology. The common file
size limits are like this:
||File size limit
|FAT16 (Windows 9x/ME)
||2GB - 1 byte
|FAT16 (Windows NT and later)
||4GB - 1 byte
||4GB - 1 byte
||2TB - 1 byte
10. Whenever I
enable Preview, I get the
following message: "Unable to add the sample grabber to the filtergraph.
What does that mean and how do I fix it?
The error means that the Sample Grabber, a software component used to
make the still captures, is not installed or registered in your system. This
usually means that the version of DirectX installed on your PC is outdated.
To fix this issue, go to the
Microsoft Update website and install the latest version of DirectX.
You can also try my
assistant and see if the error can be fixed.
11. The preview is in black and
white. How do I turn the color mode on?
There may be different reasons for a B/W display:
- If you have a video capture card that supports different standards
like PAL or NTSC, make sure that it is set to the correct mode for the
input signal. To change it, go to Options > Video Capture
Filter... and set the Video Standard (PAL in Europe, SECAM in
France, NTSC in US and Japan, etc.)
- If you changed many settings and you cannot remember which ones, you
can simply delete the AMCap.ini file after closing the program.
If B/W preview remains after the program is restarted, make sure that
the brightness and contrast levels are correct. To do so, click the
> Video Capture Filter... menu and adjust the brightness/contrast
levels. If you have a Restore Factory Defaults button, just click
it. Also if a Black and White checkbox is available, clear it if
it is ticked.
- Finally check whether the latest version of the drivers of your video
capture source is installed in your system, some drivers simply don't
restore or don't report the default settings correctly.
12. I'd like to capture some video
in PAL 60Hz at 30fps but AMCap does not allow me to set a frame rate above
25fps. Is there a workaround?
By default, PAL is a video standard at 50Hz and 25 frames per second
(fps). To capture at 30 fps, you have to select PAL_60 in the
Video Standard drop-down list from the Options > Video Capture
Filter... menu. You can then go to Options > Video Capture
Pin... and set Frame Rate to 30. If PAL_60 is not
available in the list, the driver of your video capture source or the
hardware itself may not support it.
13. When the
application starts, I get the following error: "Unable to
register the application with the Still Image interface. [0x80040154]". I press OK and everything runs fine. How do I fix this?
You are most probably using a Windows version that does not support STI
(e.g. Windows 2000 and older). To avoid the message at startup, clear Register for STI Events
in Capture > Setup... menu,
Still Capture tab.
14. What is the "capture file"? What
file do I have to select?
The capture file is a single working file that is not fragmented and that
will be used by the program and the underlying system (DirectShow) to
temporarily store the captured video. After every capture, you can save the
actual video by using the File > Save Capture Video... menu.
By default, the capture file is called capture.avi and is located in the
root of your primary hard drive, in other words it usually is
c:\capture.avi. This must be a new file, don't select an existing file
otherwise it will be overwritten during the capture or the file allocation.
15. When I enabled the Windows Media
9 Series compression and I attempt to capture a video file, I always get the
following error: "Cannot set output file [0x80040154]". What does that
error mean and how do I fix it?
The error means that DirectShow is unable to locate the required Windows
Media ASF Writer Filter. This component is not installed by default by the
system and is only available as a redistributable component as part of the
Windows Media Format installer. You can download the installer
here or click
Redistributable Components > Windows Media Format in AMCap.
16. While installing my webcam, a
message popped up and told me that the drivers did not pass the Windows Logo
testing and now AMCap says that no video capture source is installed. What's
wrong and how do I possibly fix this issue?
Drivers that pass the Windows Logo testing are tested and then digitally
signed by Microsoft, this ensures that the drivers meet the quality and
stability requirements. Unsigned drivers don't usually mean that they are
poor or unreliable, that just means that they were not tested by Microsoft.
Because unstable drivers may lead the system to crash and give blue screens
(BSOD), the newest 64-bit editions of Windows may require signed drivers to
ensure overall stability.
In general, it is recommended that you visit the website of the
manufacturer to get the latest signed drivers for your devices. Only install
unsigned drivers if you don't have a better choice.
When installing unsigned drivers, a dialog box pops up with a message
<your webcam driver>
has not passed Windows Logo testing to verify its compatibility with Windows XP (...)
This dialog has two buttons: Continue Anyway and STOP
Installation. If you hit the STOP Installation button or press
the Enter key, the drivers won't install, this is probably what
happened in your case.
If the manufacturer does not have signed drivers, complete the following
steps to make sure that your system is not configured to never install
unsigned driver software by default:
- Click Start
- right-click My Computer
- click Properties
- click the Hardware tab
- click the Driver Signing button
- tick Warn and Make this action the system default
- click OK twice to close the property pages
You will now be warned when installing unsigned drivers but this won't
prevent you from installing them. Once you did this, run the drivers
installation again. When the
Hardware Installation dialog box pops up again, click Continue Anyway
to complete the drivers installation.
17. I always get the following error
message when AMCap loads: "Unable to activate the high resolution still
capture - Unspecified error [0x80004005]". Once I hit OK everything
works fine though. What does that mean and how do I fix it?
This error usually means that the drivers of the webcam don't correctly
handle the Still pin. The Still pin is a feature exposed by the drivers
of a webcam to allow capture of high resolution still pictures from
You can work around this issue with the following steps:
18. I always get the following error
message when I enable Preview for my webcam: "An error occurred during
capture - The supplied user buffer is not valid for the requested operation.
[0x800706F8/9422]". What does that mean and how do I fix it?
This error usually means that there are some internal issues with the
current drivers of your webcam. Please visit the website of the
manufacturer of your webcam and possibly download and install an updated
version of the drivers. Otherwise contact the technical support of the
manufacturer for further assistance.
19. When I press one of the buttons
of my scanner and a system dialog box pops up with a list of possible
programs to launch for this action, AMCap is listed numerous times. This
also happens in the Events tab of the properties of my scanner. How do I
remove all those unwanted entries?
This is a known issue in AMCap version 9.11 and previous. This happens
when the Register for STI events
option is enabled in
tab. This option possibly allows AMCap to be
automatically launched by the system when the hardware trigger of a
STI-compatible webcam is pressed. This issue is fixed in AMCap version
9.12 and later. In the meantime, you can download and run
to remove all the
unwanted entries. Click here
to download this fix.
20. When AMCap is
opened, I get this error message: "You have no video capture hardware. Video
capture will not work properly" but I do have a webcam or video capture
source. What does that mean?
This message usually means that there is an issue with the drivers of
your video capture source or webcam and the device is not recognized by
the system. Either the drivers for the device are not installed or they
are not working properly.
Drivers are usually provided on a CD and have to be installed before the
device is plugged (webcam). If you already installed the drivers, they possibly are not working
properly or in the worst case, the device itself is not
working. Go to the Device Manager and check the possible error code.
You may also try my
program and see if it reports anything.
21. How do I enable the crosshair? The option
always appears to be grayed out.
This feature is only available when a windowless video renderer is active. To
select a windowless video renderer, click
the Capture > Setup... menu,
Options tab then select either the VMR7 windowless
or the VMR9 windowless from the Video Renderer
22. Is AMCap compatible with 64-bit systems?
Yes, AMCap is a native 32-bit application but it is compatible and will run on 64-bit systems.
23. After a few minutes of capture I get the following error message: "An error occurred during capture - The sample
start time is after the sample end time [0x80040228/10368]". What's wrong?
This error is usually due to a failing audio or video capture source driver. Please install the most recent version of the drivers if any are
available or contact the technical support of the manufacturer.
24. Audio always lags the video when I play back the captured video, how do I fix this?
Audio lagging video is usually due to the fact that the audio and video capture sources are separate and/or not synchronized by hardware.
First make sure that the audio stream is set as the master stream in Capture > Setup... menu,
Video Capture tab. When possible try to use the option Capture audio from the video source or use the
MPEG-2 option if the capture source supports it.
25. I cannot get deinterlacing to work, the menu is always grayed out. How do I enable the deinterlacing feature?
The deinterlacing menu options are only available if the configuration meets the following requirements:
- the video capture source feeds an interlaced stream
(e.g. a TV tuner or a DV camcorder).
- if the MPEG-2 option is active, the installed MPEG-2 Video Decoder supports deinterlacing.
- a Video Mixing Renderer is selected as the
video renderer in Capture > Setup... menu, Options tab.
26. I've got no sound when I use the TV tuner of my video capture card. How do I enable audio from the TV tuner?
- if there is an entry for the audio input of the TV tuner in the
Devices menu (under the separator), select it, otherwise see FAQ #5.
- if the tuner card features multiple audio inputs,
make sure that the TV tuner input is selected in the Options
> Audio Inputs menu.
- make sure the audio level of the tuner is high enough, see FAQ #3 and FAQ #5.
- if none of these options helps, try the
Options > MPEG2 menu. If the TV tuner card
features MPEG2 support, this option should give the best results.
27. I successfully installed AMCap in Windows 7 but when I use it, the parameters are not saved. How do I fix this issue?
This is a known issue that is due to the fact that the security is tighten in the Program Files folder and user data must be stored in
a dedicated folder. This is fixed in version 9.21 and later.
To workaround this issue, please either install a newer version or follow the instructions below:
- In Windows Explorer, open the %ProgramFiles%\Noel Danjou folder (or %ProgramFiles(x86)%\Noel Danjou in 64-bit systems)
- Right-click the AMCap folder.
- Click Properties.
- In AMCap Properties, click the Security tab.
- Click the Edit... button.
- In the Group or user names list, click Users (<computer>\Users).
- In Permissions for Users, tick Write.
- Click OK twice to validate and close the properties.
Alternatively, you can install the program in a folder of your choice
other than a predefined system folder.
28. Whenever I try to use the overlay feature I get the following error
message: "Unable to activate the overlay feature. No such interface supported [0x8004002 / 11982]".
How can I get the overlay feature to work?
The overlay feature requires a video renderer that can mix video streams.
The video renderer is implemented by the drivers of the graphic card installed in
your system. You may have to select another video renderer (e.g. one of the Video
Mixing Renderers), to do so:
29. I am trying to capture still images from the live video preview stream
but everytime I press the Enter key (same as Capture > Still Capture > Snap) I get the following error: "Unable
to make a still capture when the video renderer is in overlay mode... Catastrophic failure [0x8000FFFF / 3651]".
How can I get the still capture to work?
This error happens if your webcam does not feature a Still pin (a device feature especially designed to capture
still images) and the default video renderer is selected. To work around this issue, please select another video
renderer (e.g. one of the Video Mixing Renderers (VMR)), to do so: