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| SillKotscha |
| Posted: Jul 8 2002, 07:09 PM |
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smart Moderator
Group: Moderators
Posts: 146
Member No.: 6
Joined: 7-July 02
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Hi ChristianHJW,
hi everwicked,
well guys, this is a very impressive board. Good work, let's hope it is used by everyone having problems with VD. Like me  ... I really like to capture, because U can't say do this do that and U will have this result (even though I made a guide to capture look for the "TV-Capture Guide (in VD)" This guide will only be useful when you can read german, 'cause it is in german.
okey, now I will come to my first question. What do you think of the "best" settings for 'chunk size' and 'chunks in buffer'? My settings (1MB/15) are "stolen" from 'HawksCaptureGuide' and these settings will sometimes give me constantly dropped frames. I guess that is because of my 'on board sound' as I know that a seperate soundcard is the better solution. Even though my VT adjust is +0ms (!!) I get dropped frames. Not always, sometimes they occure after 5min, 8min or even just after 15min. I'm using Dittrich's VirtualDub modification:
http://www-user.rhrk.uni-kl.de/~dittrich/sync/ . Therefore I thought it might have something to do with the settings of 'chunk size' and 'chunks in buffer'. What do you think?! Any comments are appreciated.
Thanks in advance.
cheers Sill
P.S.: btw, I'd like to upload an avatar (64x54) but it won't upload at all, any ideas?
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"Have you ever noticed that whenever Microsoft calls something 'Smart', it's definitely a feature you want to disable!" |
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| everwicked |
| Posted: Jul 8 2002, 09:28 PM |
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Unregistered
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Hey there 
Glad to see people are starting to like this.
Before I start here I must say I am certainly not sure how *exactly* these settings work, one would have to dig up the sources to say exactly but I can give some pointers.
Each hard drive performs better with certain read/write chunks. You may have seen this in HeadAC3he where you need to use PTB to find the optimal read/write chunk for your drive.
Anyhow, depending on how fast your drive is you can try increasing the chunk size. Just not too much though. If you got RAID, the chunk number may help too.
But someone please validate me here, I am only guessing here.
I take it that PTB won't work on choosing the chunk sizes here but you can try. |
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| SillKotscha |
| Posted: Jul 8 2002, 10:03 PM |
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smart Moderator
Group: Moderators
Posts: 146
Member No.: 6
Joined: 7-July 02
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| QUOTE | | Glad to see people are starting to like this. |
hehe, that's the way a discussion board should be used 
Thanks for your answer everwicked. I must admit that I've rarely used HeadAC3he for audio transcoding. I rather stick to BeSweet, eventhough yesterday I found out that HeadAC3he is faster than BeSweet when transcoding AC3toOGG/Vorbis. Except the audio settings I leave everything as it is (CPU_I/O = normal, nevertheless it was 10min faster but my OGG 8MB bigger compared to Dg's BeSweet-OGG presetting) ... of topic. I don't know what you mean by "PTB". Does it mean: 1. when I found out the right setting(s), then I got a rough impression for my 'chunk size' and 'chunks in buffer' I should use in VD and 2. HeadAC3he is even more faster than it is at the moment (with my settings, CPU_I/O = normal)?!!! WOW!
cheers Sill
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"Have you ever noticed that whenever Microsoft calls something 'Smart', it's definitely a feature you want to disable!" |
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| everwicked |
| Posted: Jul 9 2002, 07:59 AM |
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Yes, bundled with HeadAC3he you will find a PTB.exe. If you run it and read the usage it will run a read/write test with various chunk sizes up to 2048 KB I think. When you run the program and find where your read/write peaks you change your headac3he.ini file with them and HeadAC3he is even faster!
For *my* system the priorities set to Highest/Highest is best, however it doesn't work that way for every system so you are welcome to test it.
Back to virtualdub: Usually the optimum chunk size is lower than 1MB so you should be able to use it Virtualdub (result taken from PTB). Try it and let us know how it goes. |
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| Nethermancer |
| Posted: Jul 9 2002, 11:48 AM |
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Unregistered
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While VD is the best editing program for my captures I have been unable to capture satisfacorily with it. I use AVI_IO to capture and this has allowed me to do 12hour/250GB continous captures in full PAL (704x576 huffy compressed) without dropping a sngle frame. In VD my Creative Audigy card causes me to drop about 5 frames per hour whatever settings I use. The shareware version will let you capture up to 12GB and the full version 400GB (FAT32) and 2TB (NTFS) and it's $25 well spent. |
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| robUx4 |
| Posted: Jul 9 2002, 01:11 PM |
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Unregistered
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Interresting
I usually use my Ati TV program to capture to MPEG. Because even if there are drop frames (seems to come from Creative audio cards) the playback has no sync problem.
(then I make the conversion to DivX5 "offline" using VD) |
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| everwicked |
| Posted: Jul 10 2002, 12:27 AM |
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ATI MMC is becoming worser and worser every time it gets updated 
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| robUx4 |
| Posted: Jul 10 2002, 09:46 AM |
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Unregistered
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| QUOTE (everwicked @ Jul 10 2002, 02:27 AM) | | ATI MMC is becoming worser and worser every time it gets updated |
Why ? |
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| SillKotscha |
| Posted: Jul 10 2002, 10:10 AM |
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smart Moderator
Group: Moderators
Posts: 146
Member No.: 6
Joined: 7-July 02
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hi folks,
thought this is a VD related board?!! ... but everyone is talking about other capturesoftware beside VD. So will I... as everwicked said MMC is absolutely crap and AVI_IO is no freeware (shouldn't talk about it anyway...see christian's announcement). Maybe some of you have heard of virtual-VCR. I've never tried it until now but I think I should do. It is a bit like VD but sticks to wdm-capturedriver.
@everwicked: I couldn't try PTB.exe until now but I will try it today... and I will tell you my test results. I really think this can solve my dropped frames problem.
cheers Sill
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"Have you ever noticed that whenever Microsoft calls something 'Smart', it's definitely a feature you want to disable!" |
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| Neo Neko |
| Posted: Jul 11 2002, 08:25 PM |
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VirtualdubMod Alpha tester
Group: Vdubmod Alpha Testing Team
Posts: 474
Member No.: 24
Joined: 11-July 02
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I have put the chunk size up and down and played with it all over the place. But I have found that the default works best for me. I have a creative card and I get about 1 in every 10,000 frames dropped. I tried forever to fix this. I could not figure what was going on because I was only using ~20% CPU to cap 640x480 44.1Khz video. Finaly I gave up and thought about it. 1 in 10000 is not bad. Barely noticable. I would like to get 0 in infinity till the end of my HD. But my stuff looks quite good and you can't notice the lost frames. |
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| SillKotscha |
| Posted: Sep 3 2002, 06:16 PM |
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smart Moderator
Group: Moderators
Posts: 146
Member No.: 6
Joined: 7-July 02
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| QUOTE (Neo Neko @ Jul 11 2002, 10:25 PM) | | I have put the chunk size up and down and played with it all over the place. But I have found that the default works best for me. |
hi folks,
after I installing my new system - winXP pro - I have to admit one thing...
I was always talking about win98se as the one and only system to do a proper capture... I should hide myself  !! that's not true for sure!!
that was my way to go with win98se...
- turn everything off (firewall etc.)
- play with all possible settings
- find the thin line between good and nearly best quality, because of having not enough space for huffy (2 1/2 h with 43GB and Huffyuv is almost impossible)
- and then be glad about every NOT dropped frame - sometimes i ended up with ~1000 - 1200 dropped frames for 1 and a half hour 
but since I have XP installed... guess what
- format: 720x540, ~2h capture = 0 dropped frames !!
- CPU usage 20-35%, Peak 55%
- then...
- internal deinterlace
- resize: 512x384
- filter mode: precise bicubic (A= -1.00)
- null transform (cropping): 512x278
movie = 1.45h
Bitrate: 791 kBit/s
sound: 128 kBit/s (lame mp3)
and the funny thing about is... everything is turned on (firewall, antivirus etc.) and I don't have to play with the settings any more - disk I/O is set to default
I guess I should rewrite the guide... 
P.S.: BaronVlad went to vacation, once he's back we'll translate our german guide into english and try to make it one of the best guides ever...
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"Have you ever noticed that whenever Microsoft calls something 'Smart', it's definitely a feature you want to disable!" |
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| Tut_Ank |
| Posted: Sep 6 2002, 04:51 AM |
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Unregistered
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| QUOTE (SillKotscha @ Sep 3 2002, 12:16 PM) | [QUOTE=Neo Neko,Jul 11 2002, 10:25 PM]...
but since I have XP installed... guess what
- format: 720x540, ~2h capture = 0 dropped frames !!
- CPU usage 20-35%, Peak 55%
- then...
- internal deinterlace
- resize: 512x384
- filter mode: precise bicubic (A= -1.00)
- null transform (cropping): 512x278
movie = 1.45h
Bitrate: 791 kBit/s
sound: 128 kBit/s (lame mp3)
and the funny thing about is... everything is turned on (firewall, antivirus etc.) and I don't have to play with the settings any more - disk I/O is set to default
I guess I should rewrite the guide...
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Heve you try to lower the frame rate? The only thing that doesnt seem to work for me is to capture on xp less than 25 fps, on 98SE I find no problem when capturing @ 15 or 16 fps and thats what I do for animation (I know that being made originally at 16 fps capturing @ 25 should compress really well when compresing to divx after, but there is alwais the noise, that takes the space and makes two identical frames compleatly different) on XP ive try everything, but if i capture lower than 25 fps (PAL) I drop frames Ive tryed to capture @16.66667 that is capture 2 frames and skip one, capture 2, skip one,....
it doesn't work  any help? |
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