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avi2vcd_faqs.txt
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2000-12-31
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avi2vcd Frequently Asked Questions - Version 1.3.8
Contents:
Question 0 - Where can I find, or do you have freeware software that converts .mpg
to avi?
Question 1 - What is avi2vcd?
Question 2 - OK, I have encoded my files, how do I get a VideoCD out of it?
Question 3 - I made a VideoCD, but my DVD player cannot play it.
Question 4 - I get a "FATAL ERROR: Could not retrieve video frame xxxx" error".
Question 5 - The encoder will not encode the avi I have.
Question 6 - When I encode a video of 10 frames per second, the mpeg player I use
claims the frame rate of the resulting mpeg is 23.976FPS, but the video
still looks jerky?
Question 7 - When I encode a video the resulting mpeg is larger than the source?
Question 8 - When I encode an avi file that uses the Cinepak (or other) codec,
the resulting mpeg is very "blocky".
Question 9 - When I encode a screen capture sequence, or a computer generated
animation, the resulting mpeg is not very clear.
Question 10 - The programs encodes my avi, but the sound is garbled, what can I do?
Question 11 - avi2vcd will not encode the video from my mjpeg capture card?
Question 12 - After encoding, the mpeg video is inverted, what can I do?
Question 13 - I cannot seem to encode videos captured from my DV Camcorder?
Question 14 - Adaptec's Easy VideoCD Creator says the mpeg produced by avi2vcd
is not "Whitebook" compliant?
Question 15 - The VideoCD creation program I use "Brand X", does not accept the
output of avi2vcd. What can I do?
Question 16 - What future enchancements are planned for avi2vcd?
Answers:
Question 0 - Where can I find, or do you have freeware software that converts .mpg
to avi?
I do not have any software that converts mpg to avi, nor can I recommend any.
If you are looking for any other software other than what is on
www.mnsi.net/~jschlic1, I suggest you begin you search at www.mpeg.org.
You might also try using VirtualDub which has a link on the web site.
Question 1 - What is avi2vcd?
avi2vcd is a Windows based program to encode avi files to VideoCD compliant
mpeg files for burning to VideoCD. The resulting VideoCD can be played on
VideoCD players, and many DVD players.
Question 2 - OK, I have encoded my files, how do I get a VideoCD out of it?
Avi2vcd is just the file encoder. You will still need a CD recording
application which can create all the required structures required for
a VideoCD, as well as write the mpeg files to individual tracks on the
VideoCD. There are several such packages out there such as NTI CD Maker,
the full (Deluxe) version of EZ CD Creator, InstantVideo, Nero, etc.
Question 3 - I made a VideoCD, but my DVD player cannot play it.
Not all DVD players can play VideoCDs. Some DVD players that can play
commercially stamped "silver" VideoCD's cannot play VideoCD's on CD-R. You
need to try both CD-R and CD-RW media. I have found that even different
brands of CD-RW get different results. My own DVD player cannot play
Video CD's recorded on CD-R, but it can play VideoCD's recorded on
SOME (not all) brands of CD-RW.
Question 4 - I get a "FATAL ERROR: Could not retrieve video frame xxxx" error".
If the frame number is 0, then you either do not have a properly installed
codec for the compression method this video uses, or the codec in question
is not accessible from DirectShow, and cannot be used with avi2vcd ver 1.3.
You might also need to upgrade the version of DirectX installed on your
system.
If the frame number is higher than 0:
Send me a SHORT sample avi that can recreate this problem (aprox 1 meg),
and a copy of the .log file that was generated. Also, if you were using
a codec which is not normally distributed with Windows, provide an URL
where I can retrieve a copy. If you don't know what I mean by codec, just
send me the avi. I'll see what I can do about fixing it up for the next
release.
Question 5 - The encoder will not encode the avi I have.
avi2vcd will encode avi files that fit the following limitations:
Audio: if present, must be 8 or 16 bit, sample rate of
8, 11.025, 12, 16, 22.05, 24, 32, 44.1, or 48 KHz uncompressed PCM only!
Video: The parameter requirements are:
Horzontal width <= 768
Vertical height <= 576
Frames per second >= 1
Colour depth: 8, 16, 24, or 32 bits
The video codec used must be compatible with DirectShow.
Note that for best quality, there are preferred values which will not require
avi2vcd to resize or resample the input to match VideoCD specifications. The
ideal values are (depending on target format):
NTSC:
Horzontal width: 352
Vertical height: 240
Frames per second: 29.97
Colour depth: 24 or 32 bits
PAL:
Horzontal width: 352
Vertical height: 288
Frames per second: 25
Colour depth: 24 or 32 bits
FILM:
Horzontal width: 352
Vertical height: 240
Frames per second: 23.976
Colour depth: 24 or 32 bits
AUDIO (NTSC, PAL, or FILM):
44.1KHz, 16 bit, mono or stereo
If you don't know what the parameters of the video file you have are, in
explorer, right click on the file once, then left click. Select 'Properties',
then select the tab 'Details' or 'Summary', depending on the version of
Windows.
Question 6 - When I encode a video of 12 frames per second, the mpeg player I use
claims the frame rate of the resulting mpeg is 23.976FPS, but the video
still looks jerky?
The VideoCD standard allows for frame rates of 23.976, 25, and 29.97.
The non-standard frame rate videos are resampled to a standard frame
rate by simple frame replication. Hence, for a 12FPS source video, each
source frame is converted to 2 frames in the resulting mpeg. The video is
still jerky as a result. There are still only 12 "different" frames in each
second in this case.
Question 7 - When I encode a video the resulting mpeg is larger than the source?
The resulting mpeg will always be 176400 bytes x # of seconds in source
video. This is a result of the VideoCD standard.
Question 8 - When I encode an avi file that uses the Cinepak (or other) codec,
the resulting mpeg is very "blocky".
The encoded mpeg can be no better than the original source file for video
quality, in fact it is usually significantly worse. This applies to all
codecs. To obtain maximum quality, you must use a high quality original
video that is only slightly compressed, or not compressed at all. Simply
encoding miscellaneous avi's you may have lying around will probably not
work very well. The encoder is paricularily sensitive to noise, if the
source avi has visible noise in the picture, it will not encode well.
Question 9 - When I encode a screen capture sequence, or a computer generated
animation, the resulting mpeg is not very clear.
Mpeg was intended to compress real world video images, not artificial
computer generated images.
Question 10 - The programs encodes my avi, but the sound is garbled, what can I do?
Please send me a copy of the .log file that avi2vcd generated when you
tried to encode the video. The most likely cause is that your video uses
compressed audio. Avi2vcd can only handle uncompressed audio. If you
insist on encoding a video with compressed audio, then you will have to
use another program to convert your video file to one with uncompressed
audio. Most video editing programs can accomplish this task for you.
Question 11 - avi2vcd will not encode the video from my mjpeg capture card?
Some mjpeg capture cards use a hardware based codec which is not compatible
with the DirectShow component of DirectX. Some software mjpeg codecs are also
not compatible with DirectX. You should first make sure you have the latest
version of the codec. If that still does not work, then the only other thing
I can suggest is to contact the manufacturer and request a DirectShow
compatible version of your codec. Also make sure you have the latest version
of DirectX installed on your system.
Question 12 - After encoding, the mpeg video is inverted, what can I do?
Most inverted video is automatically corrected by avi2vcd. If your's is not,
select the "Invert Video" check box before encoding.
Question 13 - I cannot seem to encode videos captured from my DV Camcorder.
See the the "DV_readme.txt" file included with avi2vcd.
Question 14 - Adaptec's Easy VideoCD Creator says the mpeg produced by avi2vcd
is not "Whitebook" compliant?
Start up VideoCD creator, go to Help - > About. What does the dialog box
say next to "MCI Mpeg Video Driver:"? If it says something other than
"DirectShow" or "ActiveMovie", for example "QI Cinemaster DVD", than that's
probably the problem. Easy VideoCD Creator uses the default MCI MPEG driver
to determine the source mpegs characteristics. Many DVD software players
replace the DirectShow MCI Driver with their own, which may not properly
identify the mpeg file characteristics to Easy VideoCD Creator. All I can
suggest is that you remove whatever software installed the new MCI driver
and try again. You should also request a fix from the manufacturer of the
software which caused the problem.
Question 15 - The VideoCD creation program I use "Brand X", does not accept the
output of avi2vcd. What can I do?
Make sure you are using the latest version of the program. If that still
does not work, send me an email with the name, version, and a web location
where I can download an evaluation copy of the program in question. I will
attempt to resolve this for the next version. If an evaluation version is not
available, I will contact the software company and see if they are willing
to help.
Question 16 - What future enchancements are planned for avi2vcd?
Several enchancements which I hope to add to avi2vcd over time are (note
that this list does not imply any priority order):
- ability to handle compressed audio, and more input file formats
- multiple avi's to multiple mpeg's (batch processing)
- multiple input avi's to a single mpeg
- a command line option for batch processing
- user access to advanced options