Interleaving every frame or every 500 ms ?? [Archive] - Page 3

Chibi Jasmin

31st October 2002, 19:16

But is has to put something in there, instead of just cutting out an ac3-frame, as this will screw a/v-sync (especially, if it happens more than once). You would have to put up a 'blank' frame, just leave out one frame , if possible!? Or maybe duplicate the frame before....wouldn't you?

alexnoe

31st October 2002, 19:25

Duplicating the same frame would sound weird, to express it carefully.
If this happenes several times in one movie, then the file is crap and not repairable.

Chibi Jasmin

31st October 2002, 19:44

Can't something like a 'silent' frame be inserted? You are really going to just destroy av-sync? Or did I get something wrong...if one ac3-frame in the middle is corrupt or missing, what will this resynch option do exactly?

The point is Nandub/Vdub can handle their own files (also rejoin them), however crappy they might be before and after...

MaTTeR

31st October 2002, 20:03

Wow...between the 2 of you, this thread has really spread wings:D

Possibility to summarize all this information somewhere in the readme file or web page after you have got it all straight. This is certainly one of the most comprehensive threads I've seen on muxing/interleaving.

alexnoe

31st October 2002, 20:05

If only one frame is deleted, then the A/V deviation will not be more than 32ms -> you won't even see it. Really not.
A silent frame would be possible (I could take the first frame of the first file; this one should be silent).

It would be no problem to process all these files if i'd just take AC3 as a bytestream and create files as terrible as what NanDub generates. The point is that I refuse to do so.

Chibi Jasmin

31st October 2002, 20:19

I understand that you refuse to do it like Nandub/VDub do...but please think seriously about some 'silent' or 'blank' frame feature....I already have a 3 cd-movie, that has this problem, would sum up to 64 ms delay for the skipped frames and maybe some more for the screwed frame at the beginning...

alexnoe

31st October 2002, 20:23

OK, the german pre-release can now resynch AC3 within the stream. Later versions will output info on where any issues were encountered, the current one doesn't

As to summerize this thread:
Not today :p We have Blair Witch Project on TV now, and from 0:00 to 3:15 (yes, a.m.), 4 episodes of "Buffy" :)
I also have to prepare some things for university...

I could start setting up an explanation of the AVI file format, but as already said, not today :D

If it sums to -64ms, then set a delay of 32, so that it shifts from -32 to +32 during the movie.

Chibi Jasmin

31st October 2002, 20:27

Okay, if I understand correctly this version now just deletes corrupts frames in the middle and everytime cause a 32ms delay issue...is that correct? Later versions will tell you, where they caused that problem?

I really hope you get into that 'silent' frame thing...thanx for everything so far, enjoy your tv show then...

Chibi Jasmin

1st November 2002, 10:50

again a new version yesterday? What has changed?

alexnoe

1st November 2002, 13:58

There was a typo in the source (a wrong number), and I was not sure if this has already been where when I compiled the that version. So I recompiled and uploaded again.

Chibi Jasmin

1st November 2002, 14:20

Yeah, okay....thanx...

MaTTeR

4th November 2002, 18:21

Chibi Jasmin,

Have you noticed slow seeking times? Acaila mentioned this to me a week or so ago and I hadn't noticed it until now. I'm just using the default interleave values of 500/75 and indeed the seek times are slow. I also noticed the same problem when muxing MP3 files.

alexnoe,
Would it be difficult to add a demux function to the GUI also? It would be nice demux these AVI files that were muxed incorrectly with NanDub. For now I'm manually doing it with Nandub. Just a thought:)

alexnoe

4th November 2002, 19:06

MP3 and AC3 can be demuxed. Right-click onto the audio stream...
Other formats would require writing a WAV file, which I won't add unless I have time to.

The slow seek times are not understandable to me :confused: That doesn't mean that they are not there though :rolleyes:

MaTTeR

4th November 2002, 23:45

I knew about demuxing the AC3 and MP3 file but I dont see an option to demux the video stream by itself.

alexnoe

5th November 2002, 00:10

oops...that doesn't work indeed. You can't select "no audio stream" at the moment :(

Chibi Jasmin

5th November 2002, 08:45

Originally posted by alexnoe
For mininum seek operations on the disk during normal playback, use 75 as interleave and make rec lists.
This causes the player to always read large chunks, instead of seeking between video and audio on the disc, but it might slow down scanning through the file.

Isn't this 'slow scanning' what Matter might mean with 'slow seeking'? :)

I didn't have problems with slow scanning though...

BTW: Are you still considering the 'silent frame' thing or any other solution, instead of simply killing one frame, where one or both parts of one complete frame are corrupt/lost?

alexnoe

5th November 2002, 08:53

I am considering it, just while preparing the next "Hardwarepraktikum", searching for material for 3 speeches I have to give in english, learning some french vocabulary (which takes slightly more time than learning the same amount in english ;) ), working on some issues with weak sectors.
I got a LiteOn 52x for free from LiteOn in order to write a review, which will consume time as well.

You see, I'm just a bit distracted from AVI-Mux GUI :p

Chibi Jasmin

5th November 2002, 10:10

Well, no problem, I don't wanna push you...take the time you need...thanx in advance!

Chibi Jasmin

5th November 2002, 11:36

BTW: Do the ac3-corruption problems with VDub/Nandub mentioned here also apply to the new VDubMod with ac3-muxing? How about mp3 in this version (vbr? cbr?)?

alexnoe

5th November 2002, 12:33

I doubt that VDubMod has an improved AC3 code...but I haven't tried, nor have I looked into the source.

Chibi Jasmin

5th November 2002, 12:38

Let us know, if you ever happen to do so or get any information on this, please...

MaTTeR

5th November 2002, 13:55

Originally posted by Chibi Jasmin
Isn't this 'slow scanning' what Matter might mean with 'slow seeking'? :) LOL...somehow I missed that line in this thread. I suppose that's what causing the issue then.

Chibi Jasmin

5th November 2002, 14:38

Yep... :-) If seeking is to slow for you (I had no issues reading from cd with 75 interleave, seeking quite fast anyway...), just lower the interleave value then...

Chibi Jasmin

6th November 2002, 13:34

I asked the question, now I answer it :)

From VDubMod thread:

Quote: The sources of nandub were used for MP3 (and ogg, ac3...) support, indeed. However, only the modifications of nandub concerning audio were taken. There are currently no plans to include SBC (I personnally don't feel the need for it and I find that DivX or Xvid can produce very similar results while being simpler to use...).

Chibi Jasmin

9th November 2002, 11:48

What's new in 07-Nov version?

alexnoe

10th November 2002, 15:53

Number of crap bytes at the beginning of a stream is now also shown for AC3 and MP3 files (not only streams in an AVI file) Shows now a message box when done fixed disabled progress bar for creating legacy index

alexnoe

11th November 2002, 17:59

http://www.plaudersmilies.de/pissed.gifVery silly bug again. That's why it's called "pre-release":
AC3 streams were not appended if they were splitted *correctly* before...fixed.

EDIT removed another bad bug today, regarding the Mode 2 - Form 2 - Reader class.

Chibi Jasmin

11th November 2002, 20:30

Great...if we now get a solution for corrupt frames in the middle (the silent one?) instead of simple deletion, your tool is getting near perfect...

Chibi Jasmin

17th November 2002, 15:03

what's new in 16-nov version?

alexnoe

17th November 2002, 15:16

EDIT removed another bad bug today, regarding the Mode 2 - Form 2 - Reader class.I know you want to see a better solution for concatenating NanDub crap files, but not this time :p

Chibi Jasmin

17th November 2002, 15:44

Well, maybe next time then... ;)

Chibi Jasmin

27th November 2002, 11:09

What's new in 25-nov version?

alexnoe

27th November 2002, 13:16

http://forum.doom9.org/showthread.php?s=&threadid=38855

Arcon

10th June 2003, 22:08

i'm not sure if i understand this right: if i split a movie with an ac3 audio track within nandub or virtualdubmod, it might cut ac3-frames at the wrong position within a frame. but does it mean that the files are from that point on unusable for proper ac3-playback or can i get the original, working ac3-stream if i join the files together? or asked in another way: is the nandub-cutting reversable?

second question: i want to cut my movies not based on the file-size but based on the scenes. e.g. if i'd cut at 699mb i might cut in the middle of a dialog but if i wait till 701mb i might get a nice scene change to cut. so i'd like to be able to see the movie to find the right spot. how can i do this?

btw: why doesn't avimux-gui have any file-menu? i hate drag and drop, its so complicated. keyboard shortcuts are much easier to handle.

alexnoe

10th June 2003, 22:21

NanDub cutting is usually reversible, as you call it.

AVI-Mux GUI doesn't have a menu because I hate that. The number of buttons will be as low as 3 in the next version....if you don't like drag&drop, you can also right-click into the source file listbox.

Arcon

10th June 2003, 22:29

NanDub cutting is usually reversible, as you call it.

good to hear. and thanks for the fast reply.

The number of buttons will be as low as 3 in the next version....

wow. as long as it wont have only one button labeld 'do' ;)

you can also right-click into the source file listbox.

thats ok for me, too.