Difference in file sizes at 100%

[blutach]

OK, I give up. The slider for the main feature was at 100% and DVDRB simply extracted and rebuilt this VTS.

Here's the original.

http://img91.imageshack.us/img91/5310/origpe3.png

Here's the final - after what I thought was a simple demux/remux.

http://img91.imageshack.us/img91/9131/afterrebuilderaw8.png

Anybody got any clues where the extra 2Mb came from?

-----------------
[17:44:08] Phase I, PREPARATION started.
- DVD-RB v1.10.3
- VTS_02: 1,633,416 sectors.
-- Scanning and writing .D2V & .AVS files
-- Processed 120,681 frames.
-- Building .AVS and .ECL files
- VTS_10: 179 sectors.
-- Scanning and writing .D2V & .AVS files
-- Processed 12 frames.
-- Building .AVS and .ECL files
- VTS_11: 602,365 sectors.
-- Scanning and writing .D2V & .AVS files
-- Processed 46,387 frames.
-- Building .AVS and .ECL files
- VTS_12: 236,538 sectors.
-- Scanning and writing .D2V & .AVS files
-- Processed 18,224 frames.
-- Building .AVS and .ECL files
- Reduction Level for DVD-5: 90.3%
- Overall Bitrate : 4,571Kbs
- Space for Video : 4,135,948KB
- HIGH/LOW/TYPICAL Bitrates: 5,916/307/4,571 Kbs
[17:46:55] Phase I, PREPARATION completed in 2 minutes.
[17:51:59] Phase II ENCODING started
- Extracting Video for VTS_02 segment 0
- Extracting Video for VTS_02 segment 1
- Extracting Video for VTS_02 segment 2
- Extracting Video for VTS_02 segment 3
- Extracting Video for VTS_02 segment 4
- Extracting Video for VTS_02 segment 5
- Extracting Video for VTS_02 segment 6
- Extracting Video for VTS_02 segment 7
- Extracting Video for VTS_02 segment 8
- Extracting Video for VTS_02 segment 9
- Extracting Video for VTS_02 segment 10
- Extracting Video for VTS_02 segment 11
- Extracting Video for VTS_02 segment 12
- Extracting Video for VTS_02 segment 13
- Extracting Video for VTS_02 segment 14
- Extracting Video for VTS_02 segment 15
- Extracting Video for VTS_02 segment 16
- Extracting Video for VTS_02 segment 17
- Extracting Video for VTS_02 segment 18
- Extracting Video for VTS_02 segment 19
- Extracting Video for VTS_02 segment 20
- Extracting Video for VTS_02 segment 21
- Extracting Video for VTS_02 segment 22
- Extracting Video for VTS_02 segment 23
- Extracting Video for VTS_02 segment 24
- Extracting Video for VTS_02 segment 25
- Extracting Video for VTS_02 segment 26
- Extracting Video for VTS_02 segment 27
- Extracting Video for VTS_02 segment 28
- Extracting Video for VTS_02 segment 29
- Extracting STILLS for VTS_02 segment 30
- Creating M2V for VTS_10 segment 0
- Creating M2V for VTS_11 segment 0
- Creating M2V for VTS_11 segment 1
- Creating M2V for VTS_11 segment 2
- Creating M2V for VTS_11 segment 3
- Creating M2V for VTS_11 segment 4
- Creating M2V for VTS_11 segment 5
- Creating M2V for VTS_11 segment 6
- Creating M2V for VTS_11 segment 7
- Creating M2V for VTS_11 segment 8
- Creating M2V for VTS_12 segment 0
- Creating M2V for VTS_12 segment 1
- Creating M2V for VTS_12 segment 2
- Creating M2V for VTS_12 segment 3
- Creating M2V for VTS_12 segment 4
- Creating M2V for VTS_12 segment 5
[18:24:42] Phase II ENCODING completed in 33 minutes.
[18:24:42] Phase III, REBUILD started.
- Copying IFO, BUP, and unaltered files...
- Processing VTS_02
- Reading/processing TMAP table...
- Rebuilding seg 0 VOBID 1 CELLID 1
- Updating NAVPACKS for VOBID_01
- Rebuilding seg 1 VOBID 2 CELLID 1
- Rebuilding seg 2 VOBID 2 CELLID 2
- Rebuilding seg 3 VOBID 2 CELLID 3
- Rebuilding seg 4 VOBID 2 CELLID 4
- Rebuilding seg 5 VOBID 2 CELLID 5
- Rebuilding seg 6 VOBID 2 CELLID 6
- Rebuilding seg 7 VOBID 2 CELLID 7
- Rebuilding seg 8 VOBID 2 CELLID 8
- Rebuilding seg 9 VOBID 2 CELLID 9
- Rebuilding seg 10 VOBID 2 CELLID 10
- Rebuilding seg 11 VOBID 2 CELLID 11
- Rebuilding seg 12 VOBID 2 CELLID 12
- Rebuilding seg 13 VOBID 2 CELLID 13
- Rebuilding seg 14 VOBID 2 CELLID 14
- Rebuilding seg 15 VOBID 2 CELLID 15
- Rebuilding seg 16 VOBID 2 CELLID 16
- Rebuilding seg 17 VOBID 2 CELLID 17
- Rebuilding seg 18 VOBID 2 CELLID 18
- Rebuilding seg 19 VOBID 2 CELLID 19
- Rebuilding seg 20 VOBID 2 CELLID 20
- Updating NAVPACKS for VOBID_02
- Rebuilding seg 21 VOBID 3 CELLID 1
- Rebuilding seg 22 VOBID 3 CELLID 2
- Rebuilding seg 23 VOBID 3 CELLID 3
- Rebuilding seg 24 VOBID 3 CELLID 4
- Rebuilding seg 25 VOBID 3 CELLID 5
- Rebuilding seg 26 VOBID 3 CELLID 6
- Rebuilding seg 27 VOBID 3 CELLID 7
- Rebuilding seg 28 VOBID 3 CELLID 8
- Rebuilding seg 29 VOBID 3 CELLID 9
- Updating NAVPACKS for VOBID_03
- Rebuilding seg 30 VOBID 4 CELLID 1
- Updating NAVPACKS for VOBID_04
- Updated VTS_C_ADT.
- Updated VTS_VOBU_ADMAP.
- Updated IFO: VTS_02_0.IFO
- Updating TMAP table...
- Processing VTS_10
- Reading/processing TMAP table...
- Rebuilding seg 0 VOBID 1 CELLID 1
- Updating NAVPACKS for VOBID_01
- Updated VTS_C_ADT.
- Updated VTS_VOBU_ADMAP.
- Updated IFO: VTS_10_0.IFO
- Updating TMAP table...
- Processing VTS_11
- Reading/processing TMAP table...
- Rebuilding seg 0 VOBID 1 CELLID 1
- Rebuilding seg 1 VOBID 1 CELLID 2
- Rebuilding seg 2 VOBID 1 CELLID 3
- Rebuilding seg 3 VOBID 1 CELLID 4
- Updating NAVPACKS for VOBID_01
- Rebuilding seg 4 VOBID 2 CELLID 1
- Updating NAVPACKS for VOBID_02
- Rebuilding seg 5 VOBID 3 CELLID 1
- Updating NAVPACKS for VOBID_03
- Rebuilding seg 6 VOBID 4 CELLID 1
- Updating NAVPACKS for VOBID_04
- Rebuilding seg 7 VOBID 5 CELLID 1
- Updating NAVPACKS for VOBID_05
- Rebuilding seg 8 VOBID 6 CELLID 1
- Updating NAVPACKS for VOBID_06
- Updated VTS_C_ADT.
- Updated VTS_VOBU_ADMAP.
- Updated IFO: VTS_11_0.IFO
- Updating TMAP table...
- Processing VTS_12
- Reading/processing TMAP table...
- Rebuilding seg 0 VOBID 1 CELLID 1
- Rebuilding seg 1 VOBID 1 CELLID 2
- Rebuilding seg 2 VOBID 1 CELLID 3
- Rebuilding seg 3 VOBID 1 CELLID 4
- Rebuilding seg 4 VOBID 1 CELLID 5
- Updating NAVPACKS for VOBID_01
- Rebuilding seg 5 VOBID 2 CELLID 1
- Updating NAVPACKS for VOBID_02
- Updated VTS_C_ADT.
- Updated VTS_VOBU_ADMAP.
- Updated IFO: VTS_12_0.IFO
- Updating TMAP table...
- Correcting VTS Sectors...
[18:35:23] Phase III, REBUILD completed in 11 minutes.

Done.

Regards

[jdobbs]

Hmm.. I can't imagine. It's only a difference of .0068 -- but I still wonder where it comes from. It might be a difference in the way closed captions are stored. Some authoring engines use a fixed size while others use variable length. Do you have "Closed Captioning" enabled?

[Sir Didymus]

Anybody got any clues where the extra 2Mb came from?


I think it is coming from the way the authoring is done...

I mean, there is some limited degrees of freedom in order for different authoring methods to perform the packing of the streams into the VOBUs in different ways, still complying with the rule of keeping the individual VOBU duration between 0.4 and 1.2 seconds...

Of course each VOBU have a leading NavPack, so if the authoring is sub-optimal [absit iniuria verbis], more NavPacks than necessary are included in the DVD, and some little space is wasted. I would definitely not worry at all about this.

If you try to demux the original and rebuilt titles with PgcDemux, you will see that the (exact) size difference comes from the number of Nav Packs, which is higher in the rebuilt DVD...

@Jdobbs: while doing the above checks, I noticed the old issue related to VOBUs with duration less than 0.4 seconds has been reintroduced... I am not sure when, since I stopped testing your excellent application against verifiers since long time, but with the last release of DVD-RB the issue is there...

Cheers,
SD

[jdobbs]

Do you know what encoder was used?

[Sir Didymus]

CCE SP 2.70 - if you are talking about the VOBUs too short...

May I ask why do you think the encoder is a factor ?
Also - if you think it could be useful, I can send full details on the process, log files, etc. - but I think it is not necessary - on what I see the error is more or less present on all of my last backups (PAL) ... :( so it should be hopefully easy to find and replicate...

All the best,
SD

[jdobbs]

That's ok. It's easy enough to find.