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<html>
<head>
<title> Linux Video Stream Processing Tool - Examples</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<meta name="keywords" content="DVD, digital video, DV, encoder, divx,
DivX;-), lame, source, posix, avifile, opendivx, codec, linux, AC3,
program stream, video, audio, transcode, decoder, stream, YV12">
</head>
<body bgcolor=#CDB5CD>
<a name=top></a>
<table cellspacing="10" cellpadding="0" border="0" width="100%">
<tr>
<td align=left valign="top" width=30% bgcolor="#a0a0a0">
<table border="0" cellpadding="10" cellspacing="3" font size=+2 bgcolor="#ffffff" width=100%>
<td align="left" bgcolor="#e9e9e9"> <FONT
FACE="Lucida,Helvetica"> <font>DVD to MPEG-4</font>
</tr>
<tr>
<td>
This chapter gives an introduction to DVD to DivX
compression. There are actually only 2 external packages
required to make it work with <i>transcode</i>. The first
is <i>libdvdcss</i>
(recommended version is 0.0.3 - not 1.0.0!) required to
overcome the context scrambling system (CSS) and the second is a
modern MPEG-4 codec. See the <a href=index.html#modules>
modules</a> section to find out which MPEG-4 codecs are currently supported
and where to obtain the sources/binaries. Unless you enjoy
command line utilities, please take a look at the excellent
<a href="http://www.exit1.org/dvdrip/">dvd::rip</a>, which is
a full featured DVD Ripper GUI for Linux, written in
Perl, by Joern Reder.
<ul>
<li> <a href="#dvd1"> <FONT FACE="Lucida,Helvetica"> DVD
(PAL)</font></a> <br>
<ul>
<li><a href="#dvd1_43"> <FONT FACE="Lucida,Helvetica">
aspect ratio 4:3</font></a>
<li><a href="#dvd1_169"> <FONT FACE="Lucida,Helvetica">
aspect ratio 16:9</font></a>
</ul>
<br>
<li> <a href="#dvd2"> <FONT FACE="Lucida,Helvetica"> DVD
(NTSC)</font></a><br>
<ul>
<li><a href="#dvd2_43"> <FONT FACE="Lucida,Helvetica">
aspect ratio 4:3</font></a>
<li><a href="#dvd2_169"> <FONT FACE="Lucida,Helvetica">
aspect ratio 16:9</font></a>
</ul>
<br>
<li> <a href="#vob"> <FONT FACE="Lucida,Helvetica">
multiple program stream VOB chunks </font></a>
<br>
<ul>
<li><a href="#vob_mp3"> <FONT FACE="Lucida,Helvetica">
encoding audio to MP3</font></a>
<li><a href="#vob_ac3"> <FONT FACE="Lucida,Helvetica">
AC3 audio pass-through</font></a>
<li><a href="#vob_pcm"> <FONT FACE="Lucida,Helvetica">
LPCM audio pass-through</font></a>
<li><a href="#vob_mp2"> <FONT FACE="Lucida,Helvetica">
MP2 to MP3 audio re-encoding</font></a>
</ul>
</ul>
<ul>
<li> <a href="#tccat"> <FONT FACE="Lucida,Helvetica">
making a main title DVD backup with
<i>tccat</i></font></a><br>
</ul>
<p>
</td>
</tr>
</table>
</table>
<a name=dvd1></a>
<table cellspacing="10" cellpadding="0" border="0" width="100%">
<tr>
<td align=left valign="top" width=30% bgcolor="#a0a0a0">
<table border="0" cellpadding="10" cellspacing="3" font size=+2 bgcolor="#ffffff" width=100%>
<td align="left" bgcolor="#e9e9e9">
<font>PAL DVD ---> DivX 4.0 / DivX ;-)</font>
</tr>
<tr>
<td>
Here is a 3 step guide to convert a PAL DVD to an AVI
DivX movie with <FONT color=blue> MP3 </font> (default) sound under linux using
<i>transcode</i>:
<ul>
<li> (I) Put the DVD in the drive:<br>
We assume, that /dev/dvd
is a link to the actual device. The disk may be
encrypted and we need <i>libdvdcss</i> as a shared
library in the default library search path for this.
We first do some preprocessing with <i> tcscan </i>
to find out the best encoding bitrate and frame
parameter
to make
the main DVD title fit on 1 or 2 CDs with renormalized
sound. This is done by invoking the helper
programs
<i>tccat</i>, <i>tcextract</i>, <i>tcdecode</i> and
<i>tcscan</i>: <p>
<ul>
<li> bitrate:<br>
<FONT color=red>tccat -t dvd -T 1,-1 -i /dev/dvd |
tcextract -x ac3 -t vob | tcdecode -x ac3 | tcscan -x pcm</font><p>
We basically pipe all chapters (use "-1" for the
chapter argument of option "-T") of the main title
(this number may be different on your DVD) through
<i>tcextract</i>, where we have to supply the
filetype option "-t vob". The extracted AC3 stream is
decoded by <i>tcdecode</i> and analyzed by
<i>tcscan</i>.
The output may look like:<p>
<code>
[tcscan] audio frames=167838.40, estimated clip length=6713.54 seconds<br>
[tcscan] (min/max) amplitude=(-0.210/0.224), suggested volume
[tcscan] rescale=4.470 <br>
[tcscan] length: 167838 frames <br>
[tcscan] runtime: 6713 sec @ 25.000 fps <br>
[tcscan] MP3 bitrate: 128 kbps <br>
[tcscan] audio: 104.89 MB <br>
[tcscan] disk size: 650 MB | video 545.11 MB | encoder bitrate 681.17
kbps <br>
[tcscan] disk size: 700 MB | video 595.11 MB | encoder bitrate 743.65 kbps<br>
[tcscan] disk size: 1300 MB | video 1195.11 MB | encoder bitrate 1493.42 kbps<br>
[tcscan] disk size: 1400 MB | video 1295.11 MB | encoder bitrate
1618.38 kbps<br><br>
</code>
and is a simple estimate for the encoder bitrate,
using the
default values for MP3 sound encoded at 128 kbps.
Invoke <i>tcscan -h</i> to learn about more options.
The main title runtime is about 1h:52m and a high
quality encoded movie deserves a 2 CD burn.
As you can see, the unrealistic high bitrate values
for
the old Win32 dll codecs are no longer valid.<br><br>
</li>
<li> frame parameter and aspect ratio:<br>
<FONT color=red>tccat -t dvd -T 1,-1 -i
/dev/dvd | tcscan -x vob</font><p>
and press "^C" after the MPEG frame parameter
have been displayed.
In this case, the output may look like
<p>
<code> found MPEG-2 video stream [0xe0] <br>
sequence: 720x576 4:3, 25 fps, ...
</code><p>
which means, that we need to rescale the frame
to
obtain the proper aspect ratio "4:3". Another
common aspect ratio is "16:9". We show below
suggested scaling parameter and two
<i>transcode</i> processing
modes for both cases.
</li>
</ul>
<p>
<li> (II) The actual encoding session (parameter grouped
by import/processing/export):<p>
<a name=dvd1_43>Example:</a><FONT color=blue> <bf>DVD title / aspect ratio "4:3"
/ letterbox format </bf></font><p>
<table>
<tr>
<td align=left valign="top" bgcolor="#ccffcc">
transcode</td>
<td align=left valign="top" bgcolor="#ccffcc">
-i /dev/dvd/ -x dvd -T 1,-1 -V</td>
</tr>
<tr><td></td>
<td align=left valign="top" bgcolor="#ccffcc">
-B 1,0 -Y 76,8 -s 4.47</td>
</tr>
<td></td><td align=left valign="top" bgcolor="#ccffcc">
-t 83920,alien -y divx4 -w 1618 </td></tr>
</table>
<br>
<code>
[transcode] video: import frame | 720 x 576 1.25:1<br>
[transcode] video: new aspect ratio | 720 x 544 1.32:1 (-B) <br>
[transcode] video: clip frame (->) | 704 x 392
</code><p>
<ul>
<li>
We use slightly more than 1/2 of the total number of
frames "-t" or simply 1 huge file "-o
alien.avi" to be split in the last step.<br>
<li>
We clip off 76 lines at the top and bottom and 8
rows on both sides of
the movie "-Y 76,8" before encoding to get rid of the black bars. This is
only recommended for letterbox format.<br>
<li>In order to use the
fast resizing of <i> transcode</i> with option "-B", the
height and width must
be a multiple of 32. Clipping 8 columns on both
sides will do, in most cases they are black anyway.
We will get a 704x392 frame with an aspect ratio of
1.32:1, which is acceptable.<br>
<li>
Optional: We might try to go for better encoding quality.
In this case, it is recommended to use the
multi-pass encoding feature found in DivX 4.0 with option "-R 1".
However, you need a second run with
identical transcode options, except "-R 2", instead of "-R 1". The first run produces a logfile,
which is analyzed to estimate optimal encoding parameter and to
achieve an average encoding bitrate, that is close to the supplied
value of "-w" and will fit the result onto 2
CD's.<br>
<li>Optional: Use the high-quality zoom option "-Z 720x544"
instead of "-B 1,0".<br>
<li> The option "-V" consumes less CPU/PCI
bandwidth and gives a big performance increase.
</ul>
<p>
<a name=dvd1_169>Example:</a> <FONT color=blue> <bf>DVD chapter mode /
aspect ratio "16:9" / letterbox format </bf></font><p>
<table>
<tr>
<td align=left valign="top" bgcolor="#ccffcc">
transcode</td>
<td align=left valign="top" bgcolor="#ccffcc">
-i /dev/dvd/ -x dvd -V</td>
</tr>
<tr><td></td>
<td align=left valign="top" bgcolor="#ccffcc">
-j 16,0 -B 5,0 -Y 40,8 -s 4.47</td>
</tr>
<td></td><td align=left valign="top" bgcolor="#ccffcc">
-U alien -y divx4 -w 1618 </td></tr>
</table>
<br>
<code>
[transcode] video: import frame | 720 x 576
1.25:1 <br>
[transcode] video: clip frame (<-) | 720 x 544<br>
[transcode] video: new aspect ratio | 720 x 384 1.77:1 (-B) <br>
[transcode] video: clip frame (->) | 704 x 304<br>
</code><p>
<ul>
<li> We clip off 16 lines at the top and the bottom of
the movie to use the fast resizing of <i>
transcode</i> to an almost ideal aspect ratio of 1.77:1.
Clipping 8 columns on both
sides and 40 rows at the top and the bottom removes
the remaining black bars prior to encoding.
<br>
<li>
In the chapter mode "-U", the output is split into separate
files labeled alien-ch00.avi, alien-ch01.avi, ... which contain the
DVD chapters, that are known from the DVD player menu.<br>
</ul>
<p>
Example: <FONT color=blue> <bf>DVD chapter #25 /
aspect ratio "16:9"</bf></font><p>
<table>
<tr>
<td align=left valign="top" bgcolor="#ccffcc">
transcode</td>
<td align=left valign="top" bgcolor="#ccffcc">
-i /dev/dvd/ -x dvd -T 1,25 -V</td>
</tr>
<tr><td></td>
<td align=left valign="top" bgcolor="#ccffcc">
-j 0,8 -B 6,1 -Y 40,8 -s 4.47</td>
</tr>
<td></td><td align=left valign="top" bgcolor="#ccffcc">
-o alien-ch25.avi -y divx4 -w 1618 </td></tr>
</table>
<br>
<code>
[transcode] video: import frame | 720 x 576
1.25:1 <br>
[transcode] video: clip frame (<-) | 704 x 576<br>
[transcode] video: new aspect ratio | 672 x 384 1.79:1 (-B) <br>
</code><p>
<ul>
<li> We clip off 8 columns on both
sides of the movie to use the fast resizing of <i>
transcode</i>
to an almost ideal aspect ratio of 1.79:1. No further
clipping necessary for the final frame size of 672x384.
<br>
<li> The encoding stops after the selected chapter 25 is done.
</ul>
<p>
<li> (III) It's almost done:
<br> The <i> avisplit </i> utility allows to split
the
AVI file(s) produced by transcode. The utility may not
work for other AVI files. If you have one big file,
use
<br><br>
<FONT color=red> avisplit -i alien.avi -s 700</font><br>
<br> to break a huge file (AVI files have a 2 GB
limit) into the pieces alien.avi-0
and alien.avi-1 with no more than 700 MB each.
<p>
For the second example above, we now have quite a lot of files, each containing a chapter of the movie. Distribute the files, preserving
the order, onto one ore more subdirectories ./CD-N,
N=1,2,..., each containing no more than 650 or 700
MB, depending on your choice of CD. Now invoke
<i>avimerge</i> for each subdirectory <br><br>
<FONT color=red> avimerge -o movie-disk-N.avi -i ./CD_N/*.avi</font><br><br>
This will glue all the small
files to one big AVI file named movie-disk-N.avi,
where N is the number of the CD.
<i> avimerge</i> supports wildcards and is very
careful
in not trashing
your
existing AVI files.
Try to play the big files with
<i>mplayer</i>
and seek around. The audio/video synchronization
should be acceptable. If everything seems fine, go ahead
and burn your CDs.<p>
<p>
</ul>
</ul>
</table>
</table>
<a name=dvd2></a>
<table cellspacing="10" cellpadding="0" border="0" width="100%">
<tr>
<td align=left valign="top" width=30% bgcolor="#a0a0a0">
<table border="0" cellpadding="10" cellspacing="3" font size=+2 bgcolor="#ffffff" width=100%>
<td align="left" bgcolor="#e9e9e9">
<font>NTSC DVD ---> DivX </font>
</tr>
<tr>
<td>
Here is a 3 step guide to convert a NTSC DVD to an AVI
DivX movie with <FONT color=blue> MP3 </font> (default) sound under linux using
<i>transcode</i>:
<ul>
<li> (I) Put the DVD in the drive:<br>
Follow step (I) for the PAL DVD, with option "-f
23.976024" for <i>tcscan</i>.
<p>
<li> (II) The actual encoding session (parameter grouped
by import/processing/export) :<p>
<a name=dvd2_43>Example:</a> <FONT color=blue> <bf> DVD title / aspect ratio "4:3"
/ letterbox format </bf></font><p>
<table>
<tr>
<td align=left valign="top" bgcolor="#ccffcc">
transcode</td>
<td align=left valign="top" bgcolor="#ccffcc">
-i /dev/dvd/ -x dvd -T 1,-1 -g 720x480 -M 2 -V</td>
</tr>
<tr><td></td>
<td align=left valign="top" bgcolor="#ccffcc">
-X 2,0 -Y 80,8 -s 4.47</td>
</tr>
<td></td><td align=left valign="top" bgcolor="#ccffcc">
-t 83920,alien -y divx4 -w 1618 -f 23.976024</td></tr>
</table>
<br>
<code>
[transcode] video: import frame | 720 x 480 1.50:1<br>
[transcode] video: new aspect ratio | 720 x 544 1.32:1 (-X) <br>
[transcode] video: clip frame (->) | 704 x 384
</code><p>
<ul>
<li>
We use slightly more than 1/2 of the total number of
frames "-t" or simply 1 huge file to be split in the last step.<br>
<li>
We clip off 80 lines at the top and bottom and 8
rows on both sides of
the movie "-Y 80,8" before encoding to get rid of the black bars. This is
only recommended for letterbox format.<br>
<li>In order to use the
fast resizing of <i> transcode</i> with option "-X", the
height and width must
be a multiple of 32. Clipping 8 columns on both
sides will do, in most cases they are black anyway.
We will get a 704x384 frame with an aspect ratio of
1.32:1, which is acceptable.<br>
<li> We must provide the frame parameter "-g
720x480", the frame rate "-f 23.976024" and the
demuxer option "-M 2" to obtain a clean stream
at a constant frame rate.
</ul>
<p>
<a name=dvd2_169>Example:</a> <FONT color=blue> <bf>DVD chapter mode /
aspect ratio "16:9" / letterbox format </bf></font><p>
<table>
<tr>
<td align=left valign="top" bgcolor="#ccffcc">
transcode</td>
<td align=left valign="top" bgcolor="#ccffcc">
-i /dev/dvd/ -x dvd -g 720x480 -M 2 -V</td>
</tr>
<tr><td></td>
<td align=left valign="top" bgcolor="#ccffcc">
-j 16,0 -B 2,0 -Y 32,8 -s 4.47</td>
</tr>
<td></td><td align=left valign="top" bgcolor="#ccffcc">
-U alien -y divx4 -w 1618 -f 23.976024</td></tr>
</table>
<br>
<code>
[transcode] video: import frame | 720 x 480
1.50:1 <br>
[transcode] video: clip frame (<-) | 720 x 448<br>
[transcode] video: new aspect ratio | 720 x 384 1.75:1 (-B) <br>
[transcode] video: clip frame (->) | 704 x 320<br>
</code><p>
<ul>
<li> We clip off 16 lines at the top and the bottom of
the movie to use the fast resizing of <i>
transcode</i>
to an almost ideal aspect ratio of 1.77:1.
Clipping 8 columns on both
sides and 32 rows at the top and the bottom removes
the remaining black bars prior to encoding.
<br>
<li>
In the chapter mode "-U", the output is split into separate
files labeled alien-ch00.avi, alien-ch01.avi, ... which contain the
DVD chapters, that are known from the DVD player menu.<br>
</ul>
<p>
Example: <FONT color=blue> <bf>DVD chapter #10 /
aspect ratio "16:9" / viewing angle #2</bf></font><p>
<table>
<tr>
<td align=left valign="top" bgcolor="#ccffcc">
transcode</td>
<td align=left valign="top" bgcolor="#ccffcc">
-i /dev/dvd/ -x dvd -T 1,10,2 -g 720x480 -M 2 -V</td>
</tr>
<tr><td></td>
<td align=left valign="top" bgcolor="#ccffcc">
-j 0,8 -B 3,1 -s 4.47</td>
</tr>
<td></td><td align=left valign="top" bgcolor="#ccffcc">
-o alien-ch10-2.avi -y divx4 -w 1618 -f 23.976024</td></tr>
</table>
<br>
<code>
[transcode] video: import frame | 720 x 480
1.50:1 <br>
[transcode] video: clip frame (<-) | 704 x 480<br>
[transcode] video: new aspect ratio | 672 x 384 1.79:1 (-B) <br>
</code><p>
<ul>
<li> We clip off 8 columns on both
sides of the movie to use the fast resizing of <i>
transcode</i>
to an almost ideal aspect ratio of 1.79:1. No further
clipping necessary for the final frame size of 672x384.
<br>
<li> The encoding stops after the selected chapter 10 is
done.
Here, we choose a second camera angle, if the DVD has
this feature.
</ul>
<p>
<li> (III) It's almost done:<br>
Follow step (III) of the PAL DVD example.
<p>
</ul>
</ul>
</table>
</table>
<a name=vob></a>
<table cellspacing="10" cellpadding="0" border="0" width="100%">
<tr>
<td align=left valign="top" width=30% bgcolor="#a0a0a0">
<table border="0" cellpadding="10" cellspacing="3" font size=+2 bgcolor="#ffffff" width=100%>
<td align="left" bgcolor="#e9e9e9">
<font>Multiple MPEG
program stream chunks (VOB) ---> DivX</font>
</tr>
<tr>
<td>
Here is a 3 step guide to rip a DVD and convert the multiple VOB
chunks, or only a single file, using <i>transcode</i>:
<ul>
<li> We rip the DVD and put all VOB chunks, that make up the
actual movie into a subdirectory, denoted
here as
"my_movie/". For an encrypted DVD, we will need
<i>libdvdcss</i> under linux to do this, but this may
not be legal.
<br>
If you do not need DVD navigation or multiple angle
features,
the ripping is done by:<br><br>
<FONT color=red>
tccat -i /dev/dvd -T 1,-1 | split -b 1024m - my_movie/movie-
</font><p>
I assume, "/dev/dvd" is a link to the DVD
device and the main title is 1.
The DVD does not have to be mounted, just
put it in the drive. After some time,
we chunks named: movie-aa, movie-ab, ...,
which are, but the last, exactly 1GB.<br><br>
The following is also valid, if we have used other
programs to copy the DVD title VOBs onto the
harddisk.
<br>
It's a good idea, to let <i>tcprobe</i> take a look
at the files you want to encode. This is done
by typing:<br><br>
<FONT color=red>
tcprobe -i my_movie/
</font><p>
assuming that "my_movie/" is a directory in your
present work directory.
The output may look like<p>
<code>
[tcprobe] MPEG program stream<br>
[tcprobe] summary for my_movie/, (*) = not default, 0 = not detected<br>
import frame size: -g 720x480 [720x576] (*)<br>
aspect ratio: 16:9 (*)<br>
frame rate: -f 23.976 [25.000] frc=1 (*)<br>
audio track: -a 0 [0] -e 48000,16,2 [48000,16,2] -n 0x2000 [0x2000] <br>
detected (6) subtitle(s)<br>
</code><p>
As you can see, the auto-probing feature has
detected a NTSC program stream with a single AC3
audio track. In the following, we only need to take
care of the aspect ratio 16:9, but that has already been
explained in the previous section.<p>
<li> Now we can invoke <i>transcode</i> with the directory
mode, that internally concatenates all VOB
chunks. If
you need more bitrate or audio renormalization
information,
check the DVD section. The default is for MP3 audio
encoding:<p>
<a name=vob_mp3><h3>AC3->MP3</h3></a>
<table>
<tr>
<td align=left valign="top" bgcolor="#ccffcc">
transcode</td>
<td align=left valign="top" bgcolor="#ccffcc">
-i my_movie/ -V</td>
</tr>
<tr><td></td>
<td align=left valign="top" bgcolor="#ccffcc">
-j 0,8 -B 3,1 </td>
</tr>
<td></td><td align=left valign="top" bgcolor="#ccffcc">
-t 10000,movie -y divx4 </td></tr>
</table>
<p>
To enable AC3 pass-through,
use "-A" and use "-N 0x2000"
to set the proper codec
in the AVI file and the player. The default audio
track
is 0, which is in most cases the original language. If you
want to have AC3 sound in your AVI-file, use:<p>
<a name=vob_ac3><h3>AC3->AC3</h3></a>
<table>
<tr>
<td align=left valign="top" bgcolor="#ccffcc">
transcode</td>
<td align=left valign="top" bgcolor="#ccffcc">
-i my_movie/ -V -A</td>
</tr>
<tr><td></td>
<td align=left valign="top" bgcolor="#ccffcc">
-j 0,8 -B 3,1 </td>
</tr>
<td></td><td align=left valign="top" bgcolor="#ccffcc">
-t 10000,movie -y divx4 -N 0x2000</td></tr>
</table>
<p>
If you own a DVD with uncompressed PCM audio, e.g., audio track 1,
and
want to keep the quality, i.e., pass-through the sound, use:
<a name=vob_pcm><h3>PCM->PCM</h3></a>
<table>
<tr>
<td align=left valign="top" bgcolor="#ccffcc">
transcode</td>
<td align=left valign="top" bgcolor="#ccffcc">
-i my_movie/ -V -a 1</td>
</tr>
<tr><td></td>
<td align=left valign="top" bgcolor="#ccffcc">
-j 0,8 -B 3,1 </td>
</tr>
<td></td><td align=left valign="top" bgcolor="#ccffcc">
-t 10000,movie -y divx4 -N 0x1</td></tr>
</table>
<p>
If your DVD has MPEG audio, it's usually MP2 format. This is
automatically
detected and recompression to MP3 audio is performed with the
default settings. However, if you need to resample your sound, here
is an example, using audio track 2:
<a name=vob_mp2><h3>MP2->MP3</h3></a>
<table>
<tr>
<td align=left valign="top" bgcolor="#ccffcc">
transcode</td>
<td align=left valign="top" bgcolor="#ccffcc">
-i my_movie/ -V -a 2</td>
</tr>
<tr><td></td>
<td align=left valign="top" bgcolor="#ccffcc">
-j 0,8 -B 3,1 -E 44100</td>
</tr>
<td></td><td align=left valign="top" bgcolor="#ccffcc">
-t 10000,movie -y divx4</td></tr>
</table>
<p>
The "-t" option
splits the output into separate files labeled movie000.avi,
movie001.avi,..., with exactly
10000 frames per file.
On my CII 533@800 MHz, I get around 11 fps for the
encoding, using the "-V" mode, which saves alot of
bandwidth.
This will take some hours, but since we work with linux,
we don't need to care, just wait.<p>
<ul><li>
If you have to interrupt your session
for some reason, you can always restart with the
help of the "-c" option. You only need to count the
valid files, i.e., with 10000 frames,
already encoded to find out the first
parameter for this option. Drop the last AVI file
for it may be broken, but this is not the case if
you use ^C. Also use some other
basename for the "-t", like "-t 10000,movie1" to make
sure, not to overwrite your old files. Ok, the
braindead seeking implementation takes some time, but this is
rarely used anyway.
</uL>
<p>
<li> Take a look at the DVD section to learn how to avimerge
the AVI-files. After merging,
try to play the big files with
<i>mplayer</i>
and seek around. The audio/video synchronization
should be acceptable. If everything seems fine, go ahead
and burn your CDs. Note, that AC3 AVI files tend to
be up to 25% larger compared to MP3 audio, which is the
default for transcode.<p>
</ul>
</table>
</table>
<a name=tccat></a>
<table cellspacing="10" cellpadding="0" border="0" width="100%">
<tr>
<td align=left valign="top" width=30% bgcolor="#a0a0a0">
<table border="0" cellpadding="10" cellspacing="3" font size=+2 bgcolor="#ffffff" width=100%>
<td align="left" bgcolor="#e9e9e9">
<font>making a main title DVD backup with <i>tccat</i> </font>
</tr>
<tr>
<td>
Here is a short guide for making a quick "backup" of
your shiny new multi-angle DVD. <br>
NOTE: Please make sure, the DVD explicitly allows you to make a backup copy.
<p>
<ul>
<li> (0) insert your DVD;-) <p>
<li> (1) switch to a new empty directory $MY_PATH/DVD/ on your hard drive.<p>
<li>(2) if /dev/dvd is a link to your block device, use tccat's new -P
option <p>
<table>
<tr>
<td align=left valign="top" bgcolor="#ccffcc">
tccat -i /dev/dvd -P 1 | split -b 1024m - VTS_01_</td>
</tr>
</table>
<p>
This will result in a couple of files named <br>
VTS_01_aa, VTS_01_ab, ...<br>
(once LFS is fully working, a single file should be sufficient (???),
i.e., "tccat -i /dev/dvd -P 1 > VTS_01_1.VOB").<p>
<li>(3) copy the IFO files by hand. For this, you will need to mount the
DVD: <p>
<table>
<tr>
<td align=left valign="top" bgcolor="#ccffcc">
mount /dev/dvd /mnt/dvd
</tr>
<tr>
<td align=left valign="top" bgcolor="#ccffcc">
cp /mnt/dvd/VIDEO_TS/VIDEO_TS.IFO .
</tr>
</table>
<p>
You also need the title IFO file. In this case
cp /mnt/dvd/VIDEO_TS/VTS_01_0.IFO . <p>
<table>
<tr>
<td align=left valign="top" bgcolor="#ccffcc">
umount /mnt/dvd
</tr>
</table>
<p>
<li>(4) rename the chunks, first file is VTS_01_1.VOB, not VTS_01_0.VOB. The
latter contains still pictures and the like (?). <p>
<table>
<tr>
<td align=left valign="top" bgcolor="#ccffcc">
mv VTS_01_aa VTS_01_1.VOB
</tr>
<tr>
<td align=left valign="top" bgcolor="#ccffcc">
mv VTS_01_ab VTS_01_2.VOB
</tr>
<tr>
<td align=left valign="top" bgcolor="#ccffcc">
...
</tr>
</table>
<p>
<li>(5) repeat step (2-4) for other titles, you wish to keep. In most cases,
the main title will do. Note that the Example after you're done: <p>
$>ls -l .<br>
total 5529180<br>
-r--r--r-- 1 bgates users 26624 Jan 13 10:29 VIDEO_TS.IFO<br>
-r--r--r-- 1 bgates users 124928 Jan 13 10:29 VTS_01_0.IFO<br>
-rw-r--r-- 1 bgates users 1073741824 Jan 13 18:05 VTS_01_1.VOB<br>
-rw-r--r-- 1 bgates users 1073741824 Jan 13 18:06 VTS_01_2.VOB<br>
-rw-r--r-- 1 bgates users 1073741824 Jan 13 18:08 VTS_01_3.VOB<br>
-rw-r--r-- 1 bgates users 1073741824 Jan 13 18:10 VTS_01_4.VOB<br>
-rw-r--r-- 1 bgates users 1073741824 Jan 13 18:12 VTS_01_5.VOB<br>
-rw-r--r-- 1 bgates users 287461376 Jan 13 18:12 VTS_01_6.VOB<br>
<p>
<li>(6) test your copy, you need to provide an absolute path to
the backup directory:<p>
<table>
<tr>
<td align=left valign="top" bgcolor="#ccffcc">
tcprobe -i $MY_PATH/DVD -T 1
</tr>
<tr>
<td align=left valign="top" bgcolor="#ccffcc">
tccat -i $MY_PATH/DVD -T 1,C,A | [mplayer | xine | ... ] -
</tr>
</table>
<p>
and optionally check other titles, chapters (C) or even viewing angles (A).<p>
<li>(7) Please note this backup copy is suitable for navigation with import
module "-x dvd". If you prefer the cluster mode, you need to
apply my cluster mini guide to this copy of your DVD or the DVD in your
drive. The program stream contains full navigation and angle information.
These information are not preserved using the -T option with tccat.<p>
-----<br>
Hint: It does not make sense to apply the procedure to all titles
found with tcprobe, since a lot of titles share VTS* files and IFO files.
</table>
</table>
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Last modified: Thu May 16 12:56:51 CEST 2002
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