Iím trying to capture vhs tapes to AVI to encode them later. My capture card is GV-USB2 and I have an SVideo coming out of the camcorder. However, when I open the saved AVI file on Adobe Premiere, it says that itís a 720x480, 59.94fps progressive format instead of interlaced. Why? Iím using both VirtualDub software with the Lagarith Lossless Codec and the AmarecTV with the same codec and Adobe Premiere recognize the AVI files as progressive. Shouldnít they be interlaced? Iím confused.
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avi don't have a flag to specify whether it's interlaced or progressive, so basically adobe premiere sees it as progressive yet it's interlaced (assuming you really captured interlaced). You have to manually change it. I'm not familiar with adobe to help further.
GV-USB2 can capture interlaced, definitely.
Upload a short sample with motion so we can confirm what it is.
The GV-USB2 definitely does capture Interlaced. You can easily tell by stepping through a scene with movement in VDub. If you see jagged edges, it's interlaced.
As a further test/confirmation, in VDub, make sure you have both panes displayed View>Pane Layout.
Open the Deinterlace filter (Video>Filters) and set it to Yadif, Double Frame Rate, TFF (Top Field First, which is what the GV is outputting). Now step through your video. It should be smooth.
Now, change the Field order to BFF and step through. You'll get backwards-forwards motion, indicating that the field order is incorrect. That shows that your video is Interlaced.
Premiere is incorrectly diagnosing the video. Mind you, apparently analogue AVIs of this nature have very little in their metadata to tell other programs what's in them. For example, there is no aspect ratio flag.
Last edited by Alwyn; 20th Jun 2023 at 23:24.
That is weird. It's not occurring here. I'm not getting any jittering either. I've used those deinterlacing settings (export out of VDub 2 as MP4, 720x540) and this is the result. How does it look jitter-wise?
Can you give us a sample of the jittering you're seeing?
And what program is giving you the jitters? If it's Premiere, considering that it can't read get Interlace status right, it could be misinterpreting the fields incorrectly as well.
You captured incorrectly. You need to cap 29.97 fps, not 59.94 fps. Fixed with AviSynth:
LWLibavVideoSource("test2.avi") # get source, video only AssumeBFF() SelectEven() # discard odd frames ConvertToYV12(interlaced=true) QTGMC() # high quality deinterlace AudioDub(last, LWLibavAudioSource("test2.avi")) # add audio
AmarecTV and this is the setting. I didn't see 29.97 fps listed so I chose 59.94 fps. Now I have two questions, why is 29.97 not listed in the settings and why the de-interlacing wouldn't work if I cap using 59.94?
VDub2 it's definitely there. I still see it on your file. On Jagabo's file however, the jittering disappeared so definitely what Jagabo did on fixing the fps worked. Now, I don't necessarily understand the why, so I'll wait for his response to my questions.
Just selecting 59.94 fps doesn't necessarily mean that a deinterlacer kicks in. It may simply repeat frames.
Also, double-check the 'Device Setting' in the 'Graph 1(Device)' tab.
Last edited by Sharc; 21st Jun 2023 at 05:08.
the jittering is not seen on playback as much but when you go frame by frame on VDub2 it's definitely there. I still see it on your file.
I'm curious about how you can see jittering on a still frame?
The framerate setting is on the Graph1(Device) tab:
[Attachment 71882 - Click to enlarge]
The Recording tab framerate should be set to 999 so the frame rate set on the Device tab is the one used (so Lollo says! )
Last edited by Alwyn; 21st Jun 2023 at 07:16. Reason: Last line edited for clarity.
I'm still scratching my head over my settings. I am not showing the same settings that you guys are telling me to select. Here are the settings it shows for my capture device GV-USB2. fps 29.97 does not show on the list (see screenshot). Perhaps I don't have the correct driver installed?
Format: *w= 720, h= 480, fps=59.94, fcc=YUY2, bit=16 (because I don't have *w= 720, h= 480, fps=29.97, fcc=YUY2, bit=16 on the list)
Deinterlace: Weave (Off)
Video Decoder: Video standard: NTSC_M
codec: LAGS, Mode YUY2
Video File Setting: 999 FPS
Then jagabo said:
You captured incorrectly. You need to cap 29.97 fps, not 59.94 fps.
Last edited by lovethisnation; 21st Jun 2023 at 10:30.
That's weird! Here's my setup:
Graph1(device) tab> Device Settings button (note driver details at bottom):
[Attachment 71891 - Click to enlarge]
[Attachment 71892 - Click to enlarge]
Windows Device Manager:
[Attachment 71893 - Click to enlarge]
My GV-USB2 driver came from here:
Install the driver before before inserting the stick.
I am now wondering... try typing 29.97 in the frame rate box on the Recording tab.
Last edited by Alwyn; 21st Jun 2023 at 10:53. Reason: Last line added.
I noticed you have an extra 2 entries "desktop capture" and "video capture" in the Video Capture device area. Not sure if they are causing the issue.
I suggest you reset Amarec back to defaults: in it's folder, delete the AmaRecTV.ini file and have another go. My full setup guide for AmarecTV is on my website.
Last edited by Alwyn; 22nd Jun 2023 at 07:38.
You'll be getting sick of me posting. I'd never tried it before, but it appears you can manually set the framerate to 29.97 in the text field at the top of the Device tab. Change the framerate from 59.94 to 29.97 and see what capture you get.
[Attachment 71894 - Click to enlarge]
Note Alwyn's first image in post 17, Device Settings dialog from the Graph 1(device) tab:
It shows deinterlace method set to WEAVE. If you have it set to BOB try changing it to weave. That may enable all the 29.97 fps rates in the Graph 1(device) tab.
I definitely have another version of the same software installed because mine doesn't look like that. See photo.
try typing 29.97 in the frame rate box on the Recording tab.
I might want to just try to capture in VDub2 and ignore AmarecTV, but I'm perplexed.
IDK whether AmarecTV is more reliable than vdub, I haven't used it, but I don't like its options' names, neither old nor new ones. Vdub is more straightforward and does not pretend to know more about your footage than you are. What's up with "Low motion" and "High motion" BS? What is stretch/fill/fit? Does it always use deinterlacer? Eh.
and does not pretend to know more about your footage than you are. What's up with "Low motion" and "High motion" BS? What is stretch/fill/fit? Does it always use deinterlacer? Eh.
This is the same device setting for another card, Hauppauge USB-Live 2.
[Attachment 71896 - Click to enlarge]
Do not comment on something you do not know.
Difficult to debug, we're all able to capture interlaced with GV-USB2 and AmarecTV.
What I would do is to remove drivers and software and start from scratch. Follow the guide here https://www.digitalfaq.com/forum/video-capture/12986-amarectv-virtualdub-inserts.html or the guide from Alwin. Report any step here in term of images while implementing the setting, so we can help.
Does the GV-USB2 have built-in deinterlacer?
@lovethisnation, I say again, delete AmarecTV.ini and restart it.
If that doesn't work, In Device Manager, "uninstall" the GV-USB 2, reboot your machine, then re-install the GV-USB2.
Originally Posted by Bwaak
Last edited by Alwyn; 22nd Jun 2023 at 07:39.