[VCDImager Bugs/Devel] 40+ minute problems

[Anthony J. Ciani]

Well, it appears my DVD player is one of those that has problems with 40+
minute disks (a Philips DVD-711).  For a company that wanted to be so
involved in the SVCD standard, it makes machines that don't handle them
very well.....It also doesn't show the proper playtime.  It's playclock
runs at about half the speed it should.  (20:00 playtime = 10:00 clock).

Could it be that the scan-interval is wrong?  Maybe this is the reason
some players have problems with disks over 40 minutes?

Also, I have noticed that the VCD3.0 interpretation of these 40+ minute
disks is rather strange.  In fact, it only ever makes sence for the
tracks entirly below the first 24 minutes.  Or perhaps VCD3.0
interpretation is meaningless for SVCD?

Here is an example from a 2 track disk (which FF/RW fine in the DVD-711).
-----------------------------------------------------------------------------
SVCD/TRACKS.SVD
ID: `TRACKSVD'
version: 0x01
tracks: 2 
track[00]: 20:39:62, audio: 1 stream, video: NTSC stream, OGT stream: None 
track[01]: 21:01:06, audio: 1 stream, video: NTSC stream, OGT stream: None 

(VCD3.0 interpretation)  
(track[00]: 20:39:62 (cumulated), audio: 01, ogt: 21)  
(track[01]: 06:0d:0d (cumulated), audio: 00, ogt: 00)
-----------------------------------------------------------------------------

Here is the previous disk with an extra track. (It doesn't FF/RW on the
DVD-711).
-----------------------------------------------------------------------------
SVCD/TRACKS.SVD
ID: `TRACKSVD'
version: 0x01
tracks: 3
track[00]: 20:39:62, audio: 1 stream, video: NTSC stream, OGT stream: None
track[01]: 21:01:06, audio: 1 stream, video: NTSC stream, OGT stream: None
track[02]: 21:04:62, audio: 1 stream, video: NTSC stream, OGT stream: None 

(VCD3.0 interpretation) 
(track[00]: 20:39:62 (cumulated), audio: 01, ogt: 21)
(track[01]: 06:21:04 (cumulated), audio: 0d, ogt: 62)
(track[02]: 0d:0d:00 (cumulated), audio: 00, ogt: 00)
-----------------------------------------------------------------------------

And here is the first track of the previous disks with two short tracks.
Note that the VCD3.0 interpretation for the first track is different here
than for the other 2 disks.
-----------------------------------------------------------------------------
SVCD/TRACKS.SVD
ID: `TRACKSVD'
version: 0x01
tracks: 3
track[00]: 20:39:62, audio: 1 stream, video: NTSC stream, OGT stream: None 
track[01]: 00:08:24, audio: 1 stream, video: NTSC stream, OGT stream: None 
track[02]: 00:08:24, audio: 1 stream, video: NTSC stream, OGT stream: None 

(VCD3.0 interpretation) 
(track[00]: 20:39:62 (cumulated), audio: 08, ogt: 00) 
(track[01]: 24:00:08 (cumulated), audio: 0d, ogt: 24) 
(track[02]: 0d:0d:00 (cumulated), audio: 00, ogt: 00)
-----------------------------------------------------------------------------


Anthony Ciani