entry piont accuracy probelem when authoring a SVCD

[suikerklontje]

I've made a svcd and when i play it on a stand allone or software dvd player. The entrypoints are not even close at the points where i want them. This is how I authort the svcd:
1. Captured with virtual dub
2. save audiostream (wav)
3. add several filters in vitrutal dub
4. frameserved in virtualdub (only video)
5. used Cinema Craft Encoder 2.5 to encode to mpv.
settings: output video file es, vbr one pass min. 2000 kb/sec max. 2400 kb/sec
videosettings markt on:
-add sequence end code
-upper field first
-progressive frames
-linear quantizer scale
-zig zag scanning order

gop settings: M=3 M/N=5
GOP heater every 1 xN frame
SEQ heater every 1 GOP
close all GOP's marked on
6. encode audiostream with TMPGenc (Toolame plugin) Mpeg-1 layer 2, 44000 hz mono 192kb/sec
7. multiplex with AVI2MPG2 v1.24 beta 13
settings:
-SVCD
-vbr
-write program end code
-time stamps-> all frames
-forced mux rate ->6972
-add SCVD scan offsets
-pack options; size ->24 pack ->1
8. authort SVCD with VCDEasy in this order:1 lead in track, 1 motion menu, 1 video track (600mb) 1 lead out picture
when configuring the chapters I filled in the times that I want the chapters. This is the result:
chapter 2: I want 4.32 min I get 3.57 min
chapter 3: I want 8.29 min I get 7.14 min
chapter 4: I want 11.12 min I get 9.31 min
chapter 5: I want 16.08 min I get 13.55 min
and so on. The rest of the SCVD works just fine.
I've tried to encode with TMPGenc (I workt several months to experement with this program but couldn't get rit of the block noise) and had the same problem with accurate entry points

Who can help me?

[vitualis]

Is this as played back on your DVD player?

There is a possibility that your DVD player can't handle entrypoints with SVCD properly... Have you tried your disc in another model player? How does it play on the PC?

Regards.

[suikerklontje]

I have a philips 612 dvd player but here is not the problem I think, because with the software dvd player (Intervideo Windvd 4.0) I'll get the same (wrong) entry points.

I'm now trying to framserve with virtualdub and encode with TMPGEnc but I think this does'nt salve the problem. (GOP settings: Create bitstream for edditing, detect sene change, 1 GOP's, I GOP=1, P GOP=5, B GOP=2, max number of frames in a GOP=0

[suikerklontje]

the result of encoding with TMPGEnc is exacly the same.
I use vcdeasy to author the disk. When I select a mpg it does a scan first and then I'll give the times at the places where I want the chapters to be, but in the xml it give's me another time as i want.
Example: I give in 4.32 min -> xml=272.000 sec= 4.53 -> svcd=3.57min
How is this possible and has nowone else this kind of problem (and how to fix it)

[roach76]

I think this could be it. This one taken directly from VCDEasy's FAQ.

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.

but.......

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.

[roach76]

I don't use CCE so I wouldn't know where the option is but try limiting the number of frames in a GOP, to increase the amount of I frames. If you don't already do this.

[suikerklontje]

Now it works well if I encode with TMPGEnc so the problem must be in CCE, but I don't know what the difference is. I think it must be in the GOP structure. These are The structures:

CCE: IBBPBBPBBPBBPBB
TMPGEnc: IBBPBBPBBPBBPBBP

I can't change it to add a P

Has nobody else this problem with chapters on a stand allone player and CCE?

I'm desperate

ps. It has nothing to do with APS on or off

[suikerklontje]

I have the sollution for my problem solved . I have a Philips DVD612 and in the setup you can have a pbc that you can turn on or off. In my case it must be off.
So if anybody else have the same problem, check your dvd player if you can turn off the pbc.(play back control)

[vitualis]

GOP structure will not make the difference.

Similarly, I am extremely sceptical that it is something that TMPGEnc does vs. CCE. It sounds like you may have done something else differently.

BTW, entrypoints generally cannot be used with PBC turned off (some Philips players are the exception) thus you haven't really solved the problem.

Regards.