Nabble - dvdauthor-users

Perplexed: spumux or image problem?

2009-12-01T11:48:26Z

Hi at all,

Following an old message of Samantha Lane (Re: Perplexing problem with
spumux Date: 2005-04-29 04:07:16 GMT
<http://article.gmane.org/gmane.comp.multimedia.dvdauthor.user/3093/match=last+button+parameters>)

I'm working for several days to a very very simple dvd-menu with these
free software tools ;)

So, here are three images of a button

gm convert -depth 8 -colors 2 +antialias -size 720x576 density 75x80
xc:transparent menux1_normal.png
gm convert -size 720x576 -density 75x80 xc:transparent -colors 2
+antialias -fill none -stroke blue -strokewidth 1 \
-draw "rectangle 36,30 218,176" menux1_highlight.png
gm convert -size 720x576 -density 75x80 xc:transparent -colors 2
+antialias -fill none -stroke red -strokewidth 1 \
-draw "rectangle 36,30 218,176" menux1_select.png

and then a spumux.xml:

<subpictures>
<stream>
<spu
force="yes"
start="00:00:00.00"
image="menux1_normal.png"
select="menux1_select.png"
highlight="menux1_highlight.png">
<button name="1" x0="36" y0="30" x1="218" y1="176"/>
</spu>
</stream>
</subpictures>

When I run spumux it seems all OK:
[...]
INFO: Picture menux1_normal.png had 1 colors
INFO: Picture menux1_highlight.png had 2 colors
INFO: Picture menux1_select.png had 2 colors
INFO: Pickbuttongroups, success with 1 groups, useimg=1
INFO: Found EOF in .sub file.
INFO: Max_sub_size=470
INFO: 1 subtitles added, 0 subtitles skipped, stream: 32, offset: 0.12

Statistics:
- Processed 0 subtitles.
- The longest display line had -1 characters.
- The maximum number of displayed lines was 0.
- The normal display height of the font arial.ttf was 0.
- The bottom display height of the font arial.ttf was 0.
- The biggest subtitle box had 470 bytes.

But when I run dvdauthor I receive:
[...]
INFO: Creating menu for TOC

STAT: Processing menux6_final.mpg...
ERR: Cannot find button '2' as referenced by the subtitle

Running spuunmux, it seems to me that the program sees two bottons where
there is only one!
Here is sub.xml:
<subpictures>
<stream>
<spu highlight="sub00000h.png" select="sub00000s.png"
start="00:00:00.00" xoffset="36" yoffset="30" force="yes">
<button name="1" x0="36" y0="30" x1="218" y1="176" up="1"
down="1" left="1" right="1" />
</spu>
<spu highlight="sub00001h.png" select="sub00001s.png"
start="00:00:00.00" xoffset="26" yoffset="28" force="yes">
<button name="1" x0="36" y0="30" x1="218" y1="176" up="1"
down="1" left="1" right="1" />
</spu>
</stream>
</subpictures>

Is a problem of my XML file or - as I read in others various messages
the list - a problem with the RGBA channel in ImageMagick/GraphicsMagick?
How I can fix it?
I'm working with fedora 10 (kernel 2.6.27.38-170.2.113.fc10.x86_64),
ImageMagick 6.4.0 07/27/08 Q16 and GraphicsMagick 1.1.14 2008-06-05 Q8
on a AMD, on a machine with AMD Athlon(tm) 64 X2 Dual Core Processor 5200+

Thanks!

enrico

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Safe Output Directory Deletion

2009-11-28T19:49:35Z

Reminder: if you want to delete an output directory created by
dvdauthor, use the dvddirdel script provided. This only deletes the
subdirectories and files that you would expect to find within a
DVD-Video directory structure, reporting errors if it finds anything
else. This helps to guard against accidentally deleting the wrong
directory, as is possible with “rm -rf”.

Having suffered more than one accident in this regard makes me
appreciate this sort of thing. :)

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New release DVDwizard 0.6.1 is out

2009-11-18T00:38:30Z

Hello,

the new release of DVDwizard version 0.6.1 is out.
This are the changes:

0.6.1 (2009-11-17)
-----
- Minimal version of ImageMagick defined to 6.3.5-0
- Second patch for ImageMagick 6.5.5.x
- Check valid duration time of video streams
- Solution for warning 'geometry does not contain image'
- Check for NTSC videos; check existance of screenshots
- Tested with transcode 1.1.5

Especially the checks with NTSC were my work the last days. From my
side all is o.k. for NTSC. But there are some bug messages. It would
be very nice that some other people could test the new DVDwizard with
original NTSC videos.

Ciao, Joo

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Re: Multimedia Course Notes

2009-11-10T21:03:42Z

On Tue, 2009-11-10 at 20:27 +1300, Lawrence D'Oliveiro wrote:

> Ben Hutchings wrote:
> >
> > On Tue, 2009-11-10 at 14:32 +1300, Lawrence D'Oliveiro wrote:
> >
> >> Ben Hutchings wrote:
> >>
> >>> - least number of chroma samples per line, c2
> >
> >> But this is never zero. Unless you truncate it to an integer.
> >
> > Per scan-line, not per line of chroma samples. To a first
> > approximation, the sample sites for 2x subsampling look like:
> >
> > YCY YCY 4:2
> > Y Y Y Y :0
>
> But those chroma samples are shared between the lines.

Kind of. This gets complicated when you consider how it interacts with
interlacing.

> So the value is 0.5, not 0. Unless you truncate it to an integer.

Yes, well, maybe it's not so useful to treat the third number as part of
a ratio.

Ben.

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Re: Multimedia Course Notes

2009-11-09T23:27:39Z

Ben Hutchings wrote:
>
> On Tue, 2009-11-10 at 14:32 +1300, Lawrence D'Oliveiro wrote:
>
>> Ben Hutchings wrote:
>>
>>> - least number of chroma samples per line, c2
>
>> But this is never zero. Unless you truncate it to an integer.
>
> Per scan-line, not per line of chroma samples. To a first
> approximation, the sample sites for 2x subsampling look like:
>
> YCY YCY 4:2
> Y Y Y Y :0

But those chroma samples are shared between the lines. So the value is
0.5, not 0. Unless you truncate it to an integer.

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Re: Multimedia Course Notes

2009-11-09T18:30:26Z

On Tue, 2009-11-10 at 14:32 +1300, Lawrence D'Oliveiro wrote:
> Ben Hutchings wrote:
>
> > - least number of chroma samples per line, c2
>
> But this is never zero. Unless you truncate it to an integer.

Per scan-line, not per line of chroma samples. To a first
approximation, the sample sites for 2x subsampling look like:

YCY YCY 4:2
Y Y Y Y :0

Ben.

--
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- Robert Coveyou

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Re: Multimedia Course Notes

2009-11-09T17:32:03Z

Ben Hutchings wrote:

> - least number of chroma samples per line, c2

But this is never zero. Unless you truncate it to an integer.

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Re: Multimedia Course Notes

2009-11-09T17:21:15Z

On Mon, 2009-11-09 at 23:15 +1300, Lawrence D'Oliveiro wrote:
> Where do those "4:2:2", "4:1:1" and "4:2:0" numbers come from
> <http://www.cs.cf.ac.uk/Dave/Multimedia/node196.html>? I know they're
> commonly used, but they don't really seem to mean anything.
>
> If the second and third numbers refer to the downsampling factors in the
> vertical and horizontal directions respectively, then the numbers should
> be "4:2:1", "4:2:0.5" and "4:1:1".

It's a ratio between:
- number of luma samples per line, l
- greatest number of chroma samples per line, c1
- least number of chroma samples per line, c2
usually scaled so the largest number is 4.

In practice c2 can either be equal to c1 (no vertical subsampling) or
zero (2x vertical subsampling).

Ben.

--
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- Robert Coveyou

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Re: Multimedia Course Notes

2009-11-09T03:51:46Z

Lawrence D'Oliveiro пишет:
> Where do those "4:2:2", "4:1:1" and "4:2:0" numbers come from
> <http://www.cs.cf.ac.uk/Dave/Multimedia/node196.html>? I know they're
> commonly used, but they don't really seem to mean anything.
>
> If the second and third numbers refer to the downsampling factors in the
> vertical and horizontal directions respectively, then the numbers should
> be "4:2:1", "4:2:0.5" and "4:1:1".
>
As far as I understand the second number shows downsampling factor
horizontally (it is equal for both chroma). Third number shows nothing
real, just mapping to a particular schema (IMHO).

Ilya

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Re: Multimedia Course Notes

2009-11-09T02:15:23Z

Where do those "4:2:2", "4:1:1" and "4:2:0" numbers come from
<http://www.cs.cf.ac.uk/Dave/Multimedia/node196.html>? I know they're
commonly used, but they don't really seem to mean anything.

If the second and third numbers refer to the downsampling factors in the
vertical and horizontal directions respectively, then the numbers should
be "4:2:1", "4:2:0.5" and "4:1:1".

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Multimedia Course Notes

2009-11-09T01:13:19Z

Been reading these online notes
<http://www.cs.cf.ac.uk/Dave/Multimedia/index_html> for a course on
multimedia. Just noticed on this page
<http://www.cs.cf.ac.uk/Dave/Multimedia/node136.html>, it says:

Using the traditional (and rather subjective) television measurement
of lines of horizontal resolution DVD can have 540 lines on a
standard TV (720/(4/3)) and 405 on a widescreen TV (720/(16/9)).

Actually, that’s wrong. The 4:3 factor is the “Kell factor”, it has
nothing to do with the aspect ratio of the screen. Thus the same 540
value applies to both narrowscreen and widescreen formats.

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Re: [Dvdauthor-developer] spumux/dvd-text TitleList and Menus not working on a Sony player

2009-11-08T21:47:57Z

jon33 wrote:

> On the computers, and in one DVD player in the house, the DVD starts at the
> first menu, and the menus work fine.
>
> In the Sony DVD player, there are two problems - (1) it does not fire up the
> first menu automatically, and (2) the selection highlight on the menu does
> not appear.

Not sure about the second problem, but as for the first one--do you have
a command in the FPC to jump to the first menu?

Players might do something automatically in the absence of this, but DVD
recorders probably won’t.

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Re: Problem with subtitles, black on black

2009-09-23T00:49:25Z

Jan Kardell wrote:

> When I made my first dvd, english subtitles were OK but the swedish subtitles became black on black. After some investigation I found this in the file dvdvob.c line 1229:
>
> if( (st&0xf8)==0x20 ) { // subtitle
> procremap(&crs[st&31],buf+dptr,ml-dptr,&s->audch[st].audpts[s->audch[st].numaudpts-1].pts[1]);
> }
>
> Masking with 0xf8 limits remapping of color indexes to the first 8 subtitle channels. After changing this to 0xe0 I got my subtitles visible again. I used dvdauthor-0.6.14.

I have included this fix in <http://github.com/ldo/dvdauthor/tree/master>.

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Re: dvdauthor fork update

2009-09-22T03:01:49Z

> Date: Tue, 22 Sep 2009 09:39:05 +1200
> From: ldo@...
> * consistently check for errors on all file opens (including the
> dvdauthor XML file)

I can at least confirm this is fixed. Thanks for putting your time and effort into this project.

Andreas
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dvdauthor fork update

2009-09-21T14:39:05Z

I have finally got around to including a couple of useful patches in my
fork of dvdauthor <http://github.com/ldo/dvdauthor/tree/master>:

* check for errors on output directory creation
* consistently check for errors on all file opens (including the
dvdauthor XML file)

Feel free to test it out and let me know if I've introduced any bugs
that weren't there before. :)

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New authoring program, Bombono DVD

2009-09-13T10:10:33Z

Hi all!

I've released the first public version of my program, Bombono DVD, see
here -
http://www.bombono.org

Bombono DVD is easy to use program for making DVD-Video.
The main features of Bombono DVD are:
* excellent MPEG viewer: Timeline and Monitor
* real WYSIWYG Menu Editor with live thumbnails
* comfortable Drag-N-Drop support
* you can author to folder, make ISO-image or burn directly to DVD
* reauthoring: you can import video from DVD discs.

* advanced mode: you can customize generated dvdauthor-script

There are ready repositories for Ubuntu and ALT Linux and the binary for
openSUSE 11.0, for install.

It would be nice if dvdauthor users give me some feedback about it. :)

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New release of DVDwizard version 0.6.0

2009-09-13T01:49:01Z

Hello,

after some month of development the new major version 0.6.0 is ready.
You can download the sources from

http://sourceforge.net/projects/dvdwizard/files/

and binary packages for Debian Lenny from

http://www.joonet.de/dvdwizard/debian/

If you find some bugs, please write to

dvdwizard-users@...

Ciao, Joo

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Re: Fedora11: strange DVDStyler v1.7.3beta3 crash

2009-09-05T11:26:39Z

On 2009-07-24 03:26, Lawrence D'Oliveiro wrote:
> Otto J. Makela wrote:
>
>> ... dvdstyler gets stuck when generating the menu.
>
> Does DVDStyler run dvdauthor to do the authoring?

Sorry for the late answer, I quite forgot I wrote here.

Yes, it does. It turned out that if you call dvdauthor with a xml file
specifying an incorrectly sized button image (eg. so that it would exceed
the menu it is embedded in), dvdauthor will quit with an error message but
dvdauthor won't recognize this situation.

I've notified the dvdauthor people about this situation.
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Re: dvdauthor maintenance

2009-09-03T14:45:35Z

Andreas Falch wrote:

> I use the dvdauthor shipped with ubuntu, which means that I cannot
> expect bugs like these to be fixed.

At the moment I guess there is no official “upstream” maintainer. If you
want a more up-to-date version of dvdauthor, you’re going to have to
build it yourself.

> Will you continue to maintain your fork on github?

What I’ve mainly been doing at the moment is trying to understand how
the code works, and inserting corresponding explanatory comments.

For reference, here
<http://wiki.github.com/ldo/dvdauthor/useful-looking-patches> is a list
of links to patches that I propose to merge some day.

And here <http://wiki.github.com/ldo/dvdauthor/dvdauthor-xml-syntax> is
a summary of the dvdauthor XML syntax gleaned from my examinations of
the code so far. This includes parts not documented in the man page, as
well as those bits generated by dvdunauthor but are not currently
understood by dvdauthor.

This is still very much a part-time activity for me.

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Re: dvdauthor-users@lists.sourceforge.net.

2009-09-03T13:47:13Z

Hello,

----
Am Thu, 3 Sep 2009 12:50:05 +0000 schrieb
Andreas Falch <andreas1234567@...>:

> One should not expect any new releases from the original author then?
> I use the dvdauthor shipped with ubuntu, which means that I cannot
> expect bugs like these to be fixed.
I have generated new unofficial releases of dvdauthor. You can find
patched sources and Debian packages here:
http://www.joonet.de/dvdauthor/

You can test the Debian packages, perhaps one can be installed on
Ubuntu.

Ciao, Joo

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Re: dvdauthor-users@lists.sourceforge.net.

2009-09-03T05:50:05Z

> Date: Thu, 3 Sep 2009 21:35:42 +1200
> From: ldo@...
> > It seems there is no file existence check on -x argument in dvdcli.c. This causes
> > Segmentation fault when a non-existing file is given as argument:
>
> Yeah
> <http://sourceforge.net/mailarchive/message.php?msg_name=78jvum%241d4grh%40smtp.mailfilter6.ihug.co.nz>.

Ok, I see.

One should not expect any new releases from the original author then? I use the dvdauthor shipped with ubuntu, which means that I cannot expect bugs like these to be fixed.

Will you continue to maintain your fork on github?

Thanks

Andreas
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Re: dvdauthor-users@lists.sourceforge.net.

2009-09-03T02:35:42Z

Andreas Falch wrote:

> It seems there is no file existence check on -x argument in dvdcli.c. This causes
> Segmentation fault when a non-existing file is given as argument:

Yeah
<http://sourceforge.net/mailarchive/message.php?msg_name=78jvum%241d4grh%40smtp.mailfilter6.ihug.co.nz>.

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dvdauthor-users@lists.sourceforge.net.

2009-09-03T02:07:23Z

Hi folks,

It seems there is no file existence check on -x argument in dvdcli.c. This causes

Segmentation fault when a non-existing file is given as argument:

# dvdauthor-0.6.14.tar.gz compiled on Linux 2.6.28-15-generic
# #49-Ubuntu SMP Tue Aug 18 18:40:08 UTC 2009 i686 GNU/Linux, gcc
# version 4.3.3 (Ubuntu 4.3.3-5ubuntu4

~/download/dvdauthor/dvdauthor-0.6.14$ ./src/dvdauthor -x nosuchfile.xml
DVDAuthor::dvdauthor, version 0.6.14.
Build options: gnugetopt iconv freetype
Send bugs to

Segmentation fault
~/download/dvdauthor/dvdauthor-0.6.14$

# Apply attached patch

~/download/dvdauthor/dvdauthor-0.6.14$ ./src/dvdauthor -x nosuchfile.xml
DVDAuthor::dvdauthor, version 0.6.14.
Build options: gnugetopt iconv freetype
Send bugs to

ERR: File not found 'nosuchfile.xml'
~/download/dvdauthor/dvdauthor-0.6.14$

I'm not fluent in C so I take no offence if the another approach for checking file existence is used instead of the one used here.

Best regards,
Andreas
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diff --git a/src/dvdcli.c b/src/dvdcli.c index 4ec2d4c..d379a89 100644 --- a/src/dvdcli.c +++ b/src/dvdcli.c @@ -24,6 +24,7 @@ #include <assert.h> #include <ctype.h> #include <fcntl.h> +#include <sys/stat.h> #include "conffile.h" #include "dvdauthor.h" @@ -34,6 +35,7 @@ #define RGB2YCrCb(R,G,B) ((((int)RGB2Y(R,G,B))<<16)|(((int)RGB2Cr(R,G,B))<<8)|(((int)RGB2Cb(R,G,B)))) static int readdvdauthorxml(const char *xmlfile,char *fb); +static int file_exists (char * fileName); static int hadchapter=0,pauselen=0,writeoutput=1; static char *chapters=0; @@ -372,6 +374,7 @@ int main(int argc,char **argv) usage(); break; + // must check file existence case 'x': if( usedtocflag ) { fprintf(stderr,"ERR: Cannot specify XML config file after using command line options\n"); @@ -1151,5 +1154,22 @@ static struct elemattr attrs[]={ static int readdvdauthorxml(const char *xmlfile,char *fb) { fbase=fb; + if (file_exists(xmlfile) == 0) + { + fprintf(stderr,"ERR: File not found '%s'\n",xmlfile); + return 1; + } return readxml(xmlfile,elems,attrs); } + +static int file_exists (char * fileName) +{ + struct stat buf; + int i = stat ( fileName, &buf ); + /* File found */ + if ( i == 0 ) + { + return 1; + } + return 0; +}

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Re: How would I do this

2009-07-27T18:49:12Z

Andrew Robinson wrote:

> But I keep running into the error that I cannot get
> a video segment to jump to a menu other than the main one or the one for
> that pgc group and I cannot have more than one menu per pgc group.

Here's a description <http://www.mpucoder.com/DVD/vmi-jmp.html> of which
calls/jumps are valid where. As you can see from the last diagram, from
within a titleset, the only valid "call" operations are to the FPC, any
menu in the VMG, and the root menu in the same titleset, while the only
valid "jump" operations are to another title or part of title in the
same titleset.

In other words, you could put your special sequence as an additional
(non-title) menu in the VMG, and "call" to it in the <post> sequence at
the end of your title.

Worth a try, anyway. :)

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Re: How would I do this

2009-07-27T10:48:54Z

On 7/27/09, Andrew Robinson <awrobinson-ml@...> wrote:
> In other words, I want the video to end with a menu that is different
> than the one it began with.

There isn't much difference between a menu and a title. If the
resolution matches, and you don't mind your DVD player saying "Chapter
123 Timecode 10:00" instead of "Menu 12", then you can do it all from
within the title itself.
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Re: How would I do this

2009-07-27T08:50:07Z

On Seg, 27 Jul 2009, Andrew Robinson wrote:

> I am trying to convert a friend's wedding video to DVD. I've got a nice
> title menu that correctly jumps to the beginning of various segments,
> like the begging of the ceremony, the cutting of the cake, etc. However,
> I would like to do something that I have never done with a DVD before
> this. There is a real nice image of the rear window of the get away car
> that has "Just Married" painted on it. When the video ends, I would like
> to have that image pop up and wait for a button click of some kind. The
> button click would then take the viewer back to the main menu.
>
> In other words, I want the video to end with a menu that is different
> than the one it began with. I have tried a few thinks with the
> dvdauthor.xml file. But I keep running into the error that I cannot get
> a video segment to jump to a menu other than the main one or the one for
> that pgc group and I cannot have more than one menu per pgc group.
> Anyone have any suggestions on how I might accomplish this?

One way is with a flag: set, say, g0 = 1 when the video starts
playing. At the menu, in a pre condition, test the flag. If it's 1,
jump to the "just married" menu, otherwise display the normal menu.

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Re: How would I do this

2009-07-27T08:25:59Z

Andrew Robinson wrote:
> But I keep running into the error that I cannot get
> a video segment to jump to a menu other than the main one or the one for
> that pgc group and I cannot have more than one menu per pgc group.
> Anyone have any suggestions on how I might accomplish this?

Registers and conditional branching. Set a register in the vmgm first
play element <fpc>, then in the menu test the register and jump to one
of two menus depending if its set to "nothing played yet" or "video has
been played to end" (set the register to that value in the <post> code
of the video).

For an overkill conditional branching and pseudo-random number usage
example, I made an experimental DVD artwork:

http://claudiusmaximus.goto10.org/cm/2009-01-07_dvd2473.html
http://ia341027.us.archive.org/0/items/ClaudiusMaximus_-_DVD2473/dvd.xml

> Thanks!
>
> Andrew Robinson

Claude
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How would I do this

2009-07-27T08:00:50Z

I am trying to convert a friend's wedding video to DVD. I've got a nice
title menu that correctly jumps to the beginning of various segments,
like the begging of the ceremony, the cutting of the cake, etc. However,
I would like to do something that I have never done with a DVD before
this. There is a real nice image of the rear window of the get away car
that has "Just Married" painted on it. When the video ends, I would like
to have that image pop up and wait for a button click of some kind. The
button click would then take the viewer back to the main menu.

In other words, I want the video to end with a menu that is different
than the one it began with. I have tried a few thinks with the
dvdauthor.xml file. But I keep running into the error that I cannot get
a video segment to jump to a menu other than the main one or the one for
that pgc group and I cannot have more than one menu per pgc group.
Anyone have any suggestions on how I might accomplish this?

Thanks!

Andrew Robinson

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Re: vobsub (.sub + .idx) mux

2009-07-26T18:08:41Z

On Sun, Jul 26, 2009 at 09:14:12AM -0700, nb85 wrote:

>
> Hi,
>
> Looking at spuunmux and spumux, it would appear that using these programs,
> it is possible to extract vob subtitles from a binary sub file, and then
> these from PNG graphics into a MPEG-2. The idx text file contains additional
> meta which could be used to guide the process.
>
> Is this possible, and if so, is there a program already to do this?
> Otherwise, what advice would you have to offer someone like me considering
> writing one based on the dvdauthor source code?
>
> Kind regards,

If for "a binary sub file" you mean a vobsub file, then yes
spuunmux can be used to extract the subtitle(s).
>From the .idx file you can extract a palette file with a command like:
grep "^palette:" <vobsubname>.idx | cut -f 2 -d: | tr -d ' ' | tr ',' '\012' >palette.rgb
and also you can retrive the index of the subtitle to extract.
Then use spuunmux in the standard way:
spuunmux <options> -o <subname> -s idx -p palette.rgb <vobsubname>.sub

Giacomo

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Re: vobsub (.sub + .idx) mux

2009-07-26T16:38:12Z

nb85 wrote:

> Looking at spuunmux and spumux, it would appear that using these programs,
> it is possible to extract vob subtitles from a binary sub file, and then
> these from PNG graphics into a MPEG-2. The idx text file contains additional
> meta which could be used to guide the process.

I don't know about binary sub files. As far as I know, spuunmux only
works on MPEG-2 files, and extracts the subpictures into PNG files and
XML descriptions that can be used as input to spumux to reverse the process.

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vobsub (.sub + .idx) mux

2009-07-26T09:14:12Z

Hi,

Looking at spuunmux and spumux, it would appear that using these programs, it is possible to extract vob subtitles from a binary sub file, and then these from PNG graphics into a MPEG-2. The idx text file contains additional meta which could be used to guide the process.

Is this possible, and if so, is there a program already to do this? Otherwise, what advice would you have to offer someone like me considering writing one based on the dvdauthor source code?

Kind regards,

Nick

Re: Fedora11: strange DVDStyler v1.7.3beta3 crash

2009-07-23T17:26:21Z

Otto J. Makela wrote:

> ... dvdstyler gets stuck when generating the menu.

Does DVDStyler run dvdauthor to do the authoring?

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Re: Wrong chapter positions

2009-07-23T14:02:53Z

Eric Martel wrote:
> In order to make further investigation, could someone provide me with
> sample commands known to work for converting a .dv file to a
> DVD-compliant file for which dvdauthor has no problems setting chapters?
> I'll report back if they work on my side too. Thanks!
>

I like to use ffmpeg for conversion. I generally convert avi divx/xvid
files, but if ffmpeg can read DV it should work the same. This command
line works:

ffmpeg -i input.avi -target ntsc-dvd -b 4250k -s 720x480 -aspect 16:9
-mbd 2 -sws_flags lanczos -trellis 2 -ab 192k -ar 48000 -acodec ac3
output.mpg

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Re: Wrong chapter positions

2009-07-23T10:57:46Z

On Qui, 23 Jul 2009, Eric Martel wrote:
> As I said, that may be a naive question... I don't know how the
> chapter-jumping system works on a DVD, i.e. what dvdauthor actually does
> with the time-positions I give it in the .xml file.

I don't know the technical details, but some mark is created pointing
the the chapter boundaries.

However, since apparently there is no GOP boundary at the time you
request, dvdauthor adjusts the position you asked so that the mark
points to the nearest (or perhaps previous or following GOP boundary).

> But what I mean is
> that if I ask any DVD player to jump directly at a certain time-position
> in the movie (say, at 10mins from the beginning), every one of them will
> jump to the same frame (so they all "know" in the same way what frame is
> at which time-position).

That's certainly true.

> How come, then, when I ask dvdauthor to put a
> chapter at 10mins, the "marked frame" (maybe there isn't even such a
> thing, I don't know) will be many seconds earlier than what DVD players
> show me?

Because the frame at 10 minutes is not an I-frame (those that start
GOPs), so the position is adjusted to match a GOP boundary.

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Re: Wrong chapter positions

2009-07-23T10:48:44Z

Le 2009-07-23 11:47, Eduardo M KALINOWSKI a écrit :
> I'm not really sure what you mean. dvdauthor only gets the video and
> encapsulates it in the DVD structure. It also has nothing to do with
> playing DVDs. If you use the exact same encoded video with another dvd
> authorer program, does the chapter boundary appear in the spot you
> want, instead of several seconds off?
>

As I said, that may be a naive question... I don't know how the
chapter-jumping system works on a DVD, i.e. what dvdauthor actually does
with the time-positions I give it in the .xml file. But what I mean is
that if I ask any DVD player to jump directly at a certain time-position
in the movie (say, at 10mins from the beginning), every one of them will
jump to the same frame (so they all "know" in the same way what frame is
at which time-position). How come, then, when I ask dvdauthor to put a
chapter at 10mins, the "marked frame" (maybe there isn't even such a
thing, I don't know) will be many seconds earlier than what DVD players
show me?

As for what another dvd authorer program would do, I will surely give it
a try as soon as I can. Stay tuned! :)

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