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VCDEasy FAQ.TXT
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2002-03-22
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=====================================================================
VCDEasy v1.1.0 FAQ
=====================================================================
Q: CDRDAO is disabled by default
A: VCDEasy checks the status of the ASPI drivers. If it thinks they
are not fully installed or too old, VCDEasy disables CDRDAO. You can
manually enable CDRDAO in the VCDEasy settings page... but if you
then experience crash or error at VCDEasy restart, you will have to
upgrade your ASPI drivers. See below.
=====================================================================
Q: I keep getting a "No CD Writer Selected" on the CD Writer line.
A: No Cd/Cd Burner Devices has been detected, the CDRDAO scan has not
been launched or failed, surely because the ASPI drivers (required by
CDRDAO) is not installed or does not work properly. You can check if
the ASPI drivers is installed with "aspichk.exe" (available at
http://www.fireburner.com/downloads.shtml). If you need to install
them, use aspi32.exe (http://www.fireburner.com/downloads.shtml) or
use ForceASPI 1.7 (http://www.doom9.org/software.htm , decompress it
(with PowerArchiver http://www.powerarchiver.com/ for example),
run DUMPASPI.BAT to backup your current Aspi layer, then run
INSTASPI.BAT and reboot when it tells you to). After that, you may
need to re-activate CDRDAO manually in the VCDEasy settings page.
So also in this FAQ "Adaptec ASPI 4.7 upgrade"
=====================================================================
Q: When I start VCDEasy it fails, giving an unknown error ("illegal
operation error ").
A: This should not happen anymore since VCDEasy v1.0.4. The failure
was due to the ASPI tools (eject/load/lock/...) when windows has only
the 'default' ASPI layer. VCDEasy now checks the ASPI drivers and
disable the ASPI tools if necessary.
=====================================================================
Q: The ASPI tools (eject/load/lock/...) are disabled.
A: See "When I start VCDEasy it fails, giving an unknown error". To
enable the ASPI tools, you need to make the ASPI drivers update (See
"I keep getting a "No CD Writer Selected" on the CD Writer line").
=====================================================================
Q: I can see my Cd writer is the Cd writers list, but my Cd writer is
not recognized by CdrDao or I have burning problems
A: Your CD Writer may not supported by default by CDRDAO. Check at
http://cdrdao.sourceforge.net/drives.html. In VCDEasy, you can go to
the 'Setting' / 'CDRDAO' page and force a driver "Force Driver" for
CDRDAO. generic-mmc or generic-mmc-raw often solve the problem...
it may work... it may not work... You may directly contact the CDRDAO
team to have more information.
=====================================================================
Q: I have seen a problem when you are setting chapters entry points.
The 5 minute mark I put was in real (on my DVD player) 3 min 37...
A: If you relax APS constraints (if your player supports...) you will
not have this entry point change. If you do not relax APS constraints
(default), then GNU VCDImager assigns the nearest APS - Access Point
Sector (you asked for an entry point at 5 min, VCDImager found in the
sequence 3 min 37 as the nearest APS). See the detailed log to see
how VCDImager allocates the entry points. The more APS you have in
the sequence, the smallest the difference between what you want and
what you have will be... when you do not relax APS constraint.
=====================================================================
Q: Chapters fail to work in my DVD player. When I press the 'Next'
button it skips to the next track rather than the next chapter. If I
press 'Previous', it goes to the beginning of the current track
rather than the previous one, no matter how many times I press it.
A: The player surely does not support chapters when PBC [PlayBack
Control] is OFF (the default behavior in this case is to go to the
next video sequence when pressing NEXT). Note that this behavior may
depends on the fact that it is a VCD or a SVCD. Try with PBC ON...
=====================================================================
Q: I have a bad display of the GUI
A: Be sure to have "Tahoma" font installed on your machine or the
display will not be good.
(go to http://office.microsoft.com/downloads/2000/offeurofonts.aspx)
=====================================================================
Q: CDRDAO is no more activated by default when I first launch VCDEasy
A: I found some Windows configuration where CDRDAO itself crashes
(when doing a "cdrdao.exe scanbus", to retrieve the CD devices list).
So, I now enable CDRDAO by default only when the ASPI drivers are up
to date. But CDRDAO can still be enabled by hand in
"Settings/VCDEasy".
=====================================================================
Q: When I add an SVCD compliant MPEG file produced by TMPGEnc, I get
the following message: "Warning: consider enabling the 'update scan
offsets' option, if it is not enabled already!". I don't understand
why I get this option, or what will happen if I enable the option
mentioned.
A: 'update scan offsets' is an option for 'fixing' mpeg2 (for SVCD
only) streams, when they have been encoded according to the Chinese
MPEG2 specifications... (the case for TMPGEnc)
=====================================================================
Q: Chapters and SmartRipper - it would be excellent if instead of
just being able to paste the chapter info from the sources you
already have, if you could make it open and parse the info from the
SmartRipper TXT file, since most of us use SmartRipper to begin with.
ChapterXtractor is a nice program, but unnecessary since SmartRipper
already gives us this info.
A: The problem is that SmartRipper gives the entry points in Frames
not in Seconds so if the users change the frame rate (NTSC->PAL for
example), there may have confusion... In fact, I would like
SmartRipper to output entry points also in seconds... Or I should get
the original frame rate and compare to the sequence's one, then
change from frame to seconds... See what I already put as tooltip in
the "Create a chapter at frame" edit box...
=====================================================================
Q: IFO/ChapterXtractor and SmartRipper IFO text file sometime give
different chapter entry points
A: ChapterXtractor does IFO-parsing only, SmartRipper does
VOB-parsing (because the IFO information may be not correct).
NB: That is why you can not give SmartRipper an IFO file and have the
corresponding text file. SmartRipper generates the IFO text file
during VOB ripping.
=====================================================================
Q: I have no audio during SVCD playback via my home DVD Player, but
the SVCD plays well under Windows
A: On some DVD players, during SVCD playback the audio is only
audible via the analog audio channel of the player, not the digital
channel (fiber optics cable...). By setting the DVD player's analog
audio channel selection to PCM mode instead, this overrides the
digital audio path, and you should hear the audio
=====================================================================
Q: After a successful blank CDRW, when I perform a simulate or a
burn, VCDEasy claims that the CDRW is not empty... Why ?
A: CDRDAO, with some cd writers, needs to refresh the status of the
inserted cdr(w). The refresh is done via Eject/Reload. So after a
successful blank CDRW, you may need to eject and reload it before
trying to simulate or burn. You may check "Force Execution" in the
CDRDAO settings page instead if it works...
=====================================================================
Q: Shall I relax or not the APS (Access Point Sector) constraints
A: An "Access Point Sector", APS, is an MPEG video sector on the
VCD/SVCD which is suitable for chapter entry points. APS have to
precede every I-frame by a GOP header which shall be preceded by
a sequence header in its turn.
In relaxing the APS constraints, every sector containing an I-frame
will be regarded as an APS. This will increase the number of possible
chapter entry points... but relaxing the APS requirement may lead to
non-working entry points!
Now you can choose if you want to relax or not the APS constraints...
Note that in all cases, you can not force a chapter entry point and
being sure that the chapter will be physically at this point.
=====================================================================
Q: Shall I let VCDEasy analyze the MPEG files
A: When you let VCDEasy analyze the MPEG files, VCDEasy uses the APS
(relaxed or not) information at chapters design time. This allows to
know at design time what will be the exact entry points.
If you do not let VCDEasy analyze the MPEG files, the chapter entry
points you will enter will be changed at CD Image generation time
(VCDxBuild), so you won't be able to know at chapters design time
what will be the exact entry points (even if you relaxed the APS
constraints
See "Shall I relax or not the APS (Access Point Sector) constraints"
=====================================================================
Q: I'm not sure if this is a bug or not, but the "Previous" and
"Next" dropboxes are gray by default, but can be changed. The
"Return" and "Default" dropboxes are not gray.
A: The "Previous" and "Next" dropboxes are grayed... but then become
white if you change the value. "Gray" means "default value", i.e will
be automatically updated if you add later some other chapters, while
"White" means "Overwritten"... won't be automatically updated anymore.
In fact, it is as the Numeric Keys support but without having to check
explicitly "Overwrite this default assignment". I wanted to avoid
adding 3 more "Overwrite" checkboxes. NB: "Return" and "Default" have
default values that won't be updated, so considered as already
overwritten.
=====================================================================
Q: After a successful burn, I am unable to see the content of the Cd
under windows...
A: The "Forced Driver" may be inappropriate for you cd burner, even if
you get successful burns. For example, using a "ACER 10x8x32" you may
have this issue when using the "Generic-mmc", but it will work fine
when using "generic-mmc-raw"
=====================================================================
Q1: The VCD disc plays fine in my CD burner, but not in my PC
DVD/CD-ROM drive.
Q2: From the Windows explorer, I can not copy to the hard disk the VCD
files. I get a "Cannot copy CDI_IMAG: Invalid MS-DOS function" error
message or explorer crashes
A: See http://support.microsoft.com/default.aspx?scid=kb;en-us;Q155120
"Windows NT 4.0 does not fully support the CD-i format".
Even under Windows 9x/Me/2000/XP, you can still have problems if your
CD-ROM drive is not CD-i compatible. A user has this problem with its
PINE DVD-ROM drive. If CD-i support is useless for you, remove it!
See: http://mujty.aexx.net/vcdeasy/
=====================================================================
Q: When I do Simulation then Burn, I have
"Simulation finished successfully", then burn fail at the beginning
with "ERROR: Cannot load/unload medium."
A: Something avoid the eject between Simulation and Burn (maybe an
application like DirectCD, PacketCd or InCd).Do not do both
Simulation AND burn at the same time.
=====================================================================
Q: I have "Write data failed", "Writing failed - buffer under run?"
A: Some users reported that this problem may occur when the default
detailed CUE file is used, and seems to be solved when the "CUE For
Fireburner" file is used.
=====================================================================
Q: Authoring and Burning succeeded but I have jurky audio/video,
desynchronized audio, noise... on my DVD Player
A: It may come from the MPEG encoding or the DVD player not fully
compliant with the VCD/SVCD specifications... But it may also come
from a too high burning speed (so, decrease the burning speed),
or a CdrDao "forced" driver which seems to work but is in fact
inadequate for your Cd Writer (so, try another forced driver).
=====================================================================
Q: Since I did the Adaptec ASPI 4.7 upgrade, CDRDAO fails to write or
VCDEasy crashes... sometimes only when I have some USB devices
plugged...
A: Well... I do not know... You may go back to ASPI 4.6 using
ForceASPI if CDRDAO worked before... You may contact the CDRDAO
team... You may use Fireburner or CdrWin to burn the VCDEasy generated
BIN/CUE files...
=====================================================================
Q: VCDEasy refuses to function with network files \\SERVER\PATH\FILE
A: This limitation comes from CygWin, the UNIX emulator used by some
command line tools... CygWin currently still does not support network
files, VCDEasy can without problems...