DIF4U cellid demux and Scenarist

[thwam]

First off, I'm working with a previously encoded copy of Kill Bill Vol1 Uncut and I'm trying to add subs only during the Japanese speaking parts. I've tried to do a normal PGC demux with DIF4U, used Scenaid and imported everything into Scenarist, but when I tried to compile I got a bittrate too high error. I tried several things (not wanting to reencode a previously encoded film) but couldn't figure it out and gave up for a while.

After using DVD-RB and loving how it uses cells to get the chapters perfect, I attempted Kill Bill again using a Cell Id demux. This time I noticed that cell 18's audio was different than the rest of the movie. It was encoded in 5ch 192kbs AC3 (I assume this is why I was getting a bittrate to high error in Scenarist previously). My question is since ScenAid doesn't handle cellid demux's how do I go about remuxing everything back together? If anyone has any other ideas, I'm open to those as well. Thanks!

[influenza]

AFAIK will scenaid get chapter points exactly as well. No matter if you do PGC or vobid demuxes. The bitrate too high error is probably some still or something.

I would rather not encode/demux on cell level since that might lead to ineffective bitrate distribution.

The fact that you state you didn't encode this yourself puts you in jeopardy of being stricken for rule 6 BTW. So you might want to clarify that before anyone get's trigger happy.

[thwam]

Thanks for your reply and suggestion. :D My experience with ScenAid is that while the chapters may be perfectly placed timewise, they still end up being off framewise (if that makes any sense).

I figured that once I did the cellid demux and saw that the audio for cell 18 was 5ch and 192kbs, that it was encoded at a higher bittrate for that cell while downsampling the audio. I may be wrong in this assumption, but I'm guessing when I do a PGC demux and it strips the audio, it will mark the entire stream as being 6ch 448kbs. This will make it seem that the bittrate is too high on compile in Scenarist.

So this leaves me with how do I recompile my project without haveing to reencode anything? Thanks!

[D3s7]

Originally posted by thwam
Thanks for your reply and suggestion. :D My experience with ScenAid is that while the chapters may be perfectly placed timewise, they still end up being off framewise (if that makes any sense).

actually, no that doesn't make sense.. unless your trying to convert standards which scenaid doesn't support


I figured that once I did the cellid demux and saw that the audio for cell 18 was 5ch and 192kbs, that it was encoded at a higher bittrate for that cell while downsampling the audio. I may be wrong in this assumption, but I'm guessing when I do a PGC demux and it strips the audio, it will mark the entire stream as being 6ch 448kbs. This will make it seem that the bittrate is too high on compile in Scenarist.

So this leaves me with how do I recompile my project without haveing to reencode anything? Thanks!

If your original source is dvd-5 then yeah you should be able to to this no problem at all.... however, the import originals was more for testing.... the bitrates put in the .scp are probably not correct....

you probably could convert all your assets to placeholders, then back to data and that might fix your issue

[thwam]

Sorry that it didn't make sense then. :D It's just been my experience that where the chapters are created don't sync up exactly as they were in the original. I always had to go manually edit them in Scenarist to get them as close as possible. Maybe I was just doing something wrong along the way, who knows hehe.

Regarding ScenAid and my CellId demux, it wasn't able to create a working Scenarist script. It only tried to import the last cell's audio and video. I'm not very versed in Scenarist (I LOVE automated programs, such as your's D3s7 ;)) are there any guide's available on how to do this manually (remuxing cell's)? I was also thinking as a last resort, I might have to do a PGC demux and downsample the entire audio stream (I really don't want to have to do this though). Any other ideas?

[D3s7]

I still don't understand why you think you need to do it by cell..

scenarist ignores the audio properties all around and if your original is a DVD-5, there should be nothing you need to do

[thwam]

I thought the total bittrate was calculated as the video + audio bittrates?

I think that one cell of the movie was encoded with a higher video bittrate at the cost of audio bittrate. I'm goin only by what dvd decrypter labled the audio stream as (5ch 192kbs). Wouldn't this necessitate a cell demux? When dvd decrypter demuxes an audio stream for the entire movie, will it flag only part of the stream as being 192kbs or will the entire stream be flagged as 448kbs? If it doesn't wouldn't this make the total bittrate too high for that one cell in Scenarist? I really have no idea lol. These are just my assumptions as I'm not to knowledgable about this whole thing.

[D3s7]

Not likely... Scenarist pretty much ignores all audio settings anyway and goes by what you tell it is from the .scp

More then likely, the video settings for maxbitrate in the .scp are wrong.... - actually i'd say there's a 99% chance that's the issue if your original is dvd-5.

[thwam]

Ok, cellid demux is not neccessary then. How would you suggest I go about reauthoring this then if the scp has the wrong bittrates? Thanks for all your help btw!

[influenza]

It's a dvd 5 already. No reencoding, so bitrate is not important. You're just taking it apart, add an extra subtitle stream and putting it back together.

So you demux by pgc/vobid in dif4u (whatever is necessary). Check use original assets in scenaid. Let it create a scenarist script and import. Add the subs, compile. Do an ifoupdate/batchupdateifo (with copy audio/sub tables). And you're done.

[D3s7]

naw.. that's what he's doing.. but Scenarist checks the .SCP for bitrates of the video which is probably wrong (i believe I hardcode it for original asssets)

basically you'll need to calculate (which it soulds like you may have done already) what the real max bitrate can be and then just change the lines in the data section for those video assets to that