Video before dropped frames still 25fps and in synch?

[Valky]

I was just wondering..let's say that I'm gonna capture 2 hours program which contains example 4 Simpsons episodes. After I have encoded 1 hour and 30 minutes I am starting to get dropped frames.

So if I stop my capturing to that point and cut out the video just before the time I was getting those dropped frames, is my video before that in synch with audio 25fps and I am gonna get those 3 episodes in perfect condition or at least when I change the framerate to 25 to that part?

I capture with VirtualVCR 352x576 to PicVideo Q19 and usually everything works well. I have made some mistakes earlier when I was so stupid that I stopped my capture just before commercials, but then I noticed that I was never able to start my capture again after the commercials. My XP just crunches the previous 2Gt file so long that I wasn't able get the second one started that and even if I was it started to drop frames like hell.

[bb]

Why don't you use VirtualDub 1.4.9.2 VCR + SYNC from www.virtualdub.net (German site, but english software)? It avoids dropping frames by adapting the audio. Works great (I've been using it for many months).

bb

[Valky]

Cause I am pretty sure that VirtualVCR does excatly the same thing cause it resamples the audio. If I get 2 dropped frames in 1.5 hour capture I doubt if this VD can do any better?


But of course like always..I'll give it a shot before I judge :)

[bb]

The classic VirtualDub drops (or inserts) frames for resynchronizing due to audio getting slightly out of synch (different reference clocks in video and audio card). VirtualDubVCR+Synch doesn't drop frames for this particular reason. So if there's no other reason for frame drops you'll get zero drops. I haven't had a single frame drop for many months using this software. Of course you have to take care that there aren't any background processes running that eat up your CPU from time to time.

bb

[Candock]

using VirtualDubVCR 1.4.9.2 + sync, too.
but gettin unsync video then there are dropped frames!
what can i do?

got only 2 dropped frames per hour before i'll switch to my faster pc (faster mobo, faster graphic card, faster cpu, faster hd) and gettin now over 30 :(...

[vhelp]

Hi Valky.. :)

I can't think of no other reason not to use other capture apps..

AVI_IO is a good app to use. I've used it for my WINTV-GO and
DC10+ cards w/out any frame drops, though I use an ADVC-100 instead
these days.

My experience w/ vdub is great, but on MY system, it's not match for
those frame-drops. I get a few too many in vdub, but in AVI_IO,
ZERO !!

I also feel it necessary to mention, that most of my frame drops
were due to having an SB Live card. You know that they DO steal
CPU cycles from your PCI bus or whatever exactly. AFter yanking out
my card, and replacing it w/ an el-cheapo $19 card, I got much better
capture results - less drops.

-vhelp

[Jeff D]

I get varied results, one time 10 dropped frames in 10 minutes, try again, maybe it works, maybe 300 dropped frames in 10 minutes, try agian and maybe it works.

This is using the Vdub+VSYNC version. I waste times on the bad caps, but it will get it sooner or later.

[Valky]

well well well..after I have carefully analyzed these replies, I noticed that nobody actually answers to my question :)

I have of course tried also all kind of capture programs that is not the thing I asked here.

I have noticed that VirtualVCR suits best for me since all my capture problems main reason is VIA-motherboad and SB Live! soundcard.

I cant get to upper resolution than 384x576 or otherwise I'll get those ugly green lines that has been discussed many times.
Still I am not really sure if these can be gone just changing the soundcard or should I change my VIA-mobo also.


Anyway..back to the topic :)

I want to capture 1 hour and 30 minutes material..after one hour and 5 minutes I am beginning to get frame-drops. So I'll cut that video just before those framedrops occured and I should have perfect synched video, right? So now I just have to capture that rest of the material that was left about 25 minutes and later append these two videos together (this works for vhs only..).

This way I can avoid frame drops in vhs-tape when the dropping is not caused by the bad tape but something else (like soundcard problems)?

[Candock]

Still I am not really sure if these can be gone just changing the soundcard or should I change my VIA-mobo also.

its not a Via-Thing (u can't give Via for everything the debt :D ).
just captured with my nForce2 a half hour without sound and no dropped frames appeared. with sound there would be more than 10!!!


well, perhaps u live with that and make it sync after capturin!
(yeah, its a very bad way solvin the problem)

[^^-+I4004+-^^]

>So if I stop my capturing to that point and cut out the video just before the time I was getting those dropped frames, is my video before that in synch with audio 25fps and I am gonna get those 3 episodes in perfect condition or at least when I change the framerate to 25 to that part?

why ask?
why dont you just try it?
should i do it for you?(hehe)

i don't have good experience on wdm (w2k)
capturing and that for me means loosing sync..
so i have dualboot and i capture
with win98+virtVCR...
it's wonderfull;768x576x25fps without dropping...
do yourself a test;capture some talking heads
so you can see if any sync issues occur

cheers
/ivo

[Valky]

Originally posted by ^^-+I4004+-^^
>why ask?
why dont you just try it?
should i do it for you?(hehe)


/ivo

Because I have an endless job ahead converting 5 vhs tapes and I am not gonna do it if this solution doesn't work :)

Anyway..concerning VIA motherboard and Live! card there are some troubles raported..Live! using too much PCI-cycles or something like that.

[^^-+I4004+-^^]

ok,then:it works!
(LOL!)

[Candock]

just captured with VdubMod and gettin the same number of dropped frames.
but the sound stays sync!

[^^-+I4004+-^^]

>just captured with VdubMod

i don't know if VDMod had sync modification by
a.dietrich..probably not....
you sure you have sync part of prog(VCR or sync versions) turned on?
(in "capture->timing" i think...)
also modified audio buffer size to 18 and 36k
respectively for mono and stereo 16bit?

[Candock]

you sure you have sync part of prog(VCR or sync versions) turned on?

its set to "resample audio data to match video clock"!

yeah, i'm sure :sly:...

[Candock]

after writin a avs-script with the following content:

AVISource("capture000.avi")

the video is back in sync!

[Christian]

Hi Valky,
I couldn't help you with the sync thing, but I would like to say something to the green lines.
These lines seem to occur with to much load on the PCI-Bus. Those VIA boards are crappy, but not useless at all.
VIA provides patches for RAID systems to improve PCI performance, they have helped me with those green lines (and also with the RAID performance :) ). Look for the "Raid performance patch" RPP1.02.Zip on www.viaarena.com
Another enhancer comes from Pinnacle ftp://ftp.pinnaclesys.de/driver/pc/extras/ActualPPE.htm
I can't tell if it has helped but it has not hurt my system.
Also check your BIOS for the setting "Delay Transaction", if this is not available never mind and use the PCI-options of the tool "VCOOL".

Hope that would help.
Christian

A7V333/1800XP+/1024MB CL2-2-2-5/RAID0 320GB/WIN-TV/DVR-A04

PCMark 2002 reports my 1800XP+ as: actual 1533MHz and maximum internal frequencie 1760MHz ??

[BruceL]

^^-+I4004+-^^
You mention Win98 with virtVCR. Do you mean Virtual VCR. If so how do you over come the 4G file limit. I do not see file striping as in VDub. I am having frame drop problems and am looking for alternative methods to try.