Annoyingly visible interlacing

[Slicer]

I have Vegas 7.0. Just captured some vacation video to .m2t. When I playback the m2t on my computer the interlacing is extremely annoying and distracting.

If I simply play the tape with my hv20 hooked directly to my HDTV (1080i) it looks perfect. Obviously my capturing process (by just using the defaults) is wrong.

Video was recorded in auto, nothing special (just turn it on and record).

Is this what pulldown fixes during the capture?

Would playing these 'messed up' m2ts on my HDTV look correct (because it's native 1080i)?

[SenorKaffee]

PC monitors are progressive devices, so they make the interlacing visible. This is totally correct, no problem, no error. Your TV will most likely deinterlace automagically.

If you don´t want to see those lines on your PC you have to deinterlace the video. Did you use the progressive mode of the HV20? PAL or NTSC?

[Slicer]

I used the standard recording mode .. 1080i. HV20 is NTSC.

I guess Vegas has an option to deinterlace the video? I'll see if I can find something.

Thanks.

[Lunchbox]

You might want to try to play the video with a media player that deinterlace the video during playback (the same way your HDTV will do). I use a program called KMPlayer that has different deinterlace playback options.

check out this thread

http://www.hv20.com/showthread.php?t=474

[Slicer]

Yea. Playing back deinterlaced worked great! I've been using VLC Media Player and it has a deinterlace option.

Thanks!

[tokyo_ren]

I use Gomplayer as it recognizes most video files/codecs out of the box, or should I say out of the download. Its free as well as being great quality.

A quick heads up on terminology.

Capture is when you take a raw video signal (analogue) and "record" it to a digital media (DV tape, hard disc, memory card etc). The raw video signal will usually, but not always, be compressed using a video codec to bring the data rate/size down to a managable figure.
If say I took a betacam analogue video signal and fed it to my uncompressed SD capture card on my PC I get 20MB/s of digitized video as a file on my PC.

If you playback your DV tape in camera and feed the analogue outputs to a "capture card" then you are capturing analogue video to be digitized just as in the first description about "capture".

Data transfer would be when you playback your DV tape in camera while connected to your computer via firewire with the intention to end up with a video data file on that machine.
A lot of people, NLE folk included, refer to that as capture out of bad habit.
You are not capturing but transferring data.
However... The reason why transferring data from a DV deck to PC via firewire gets reffered to as capture is that its a one way transfer with no way for the PC to tell the tape deck to rewind a bit because it missed something. Hard discs and data cards can "rewind" and handshake to make sure the data is all there and do it ahead of time. Tape can't do that, hence we call it capture becuase its very analogy in method.

The reason why I'm explaining this is so that you can get a better understanding of what is happening when you feed the info from a DV tape to your PC/Mac via firewire. There is nothing in the process that would affect interlacing at all. When a digital transfer goes wrong (wobbly/dirty tape etc) you get lost (dropped) or garbled frames which can result jumpy video (stuttery stop motion) or in blocky grey holes.
With Mpeg2 you may see more complex artifacts but they will be much bigger than a single scan line.

Just has already been explained, the interlaced strobing that you saw is usually a display related artifact and not a problem with your data.
Unless you are creating CG to composite into video footage you have no need to worry about interlacing.

Most NLE applicatins have the ability to show full frames/fields or interlacing. You may want to set your monitors refresh rate to a multiple of 60 (60Hz etc) if you prefer to display interlacing. When you do this you will almost need to resize the video preview to 100%. Fine for SD but not so for HI-DEF (unless you have a few Apple Cinemas lying around).

With a "capture card" that has analogue ins and outs you should be able to set your NLE software up to display your video on an SD monitor (usuable for HD in some situations).
More recent cards have HDMI outs to go direct to HI-DEF TV.

I hope this helps a bit.

Ren

[mik]

You might want to try to play the video with a media player that deinterlace the video during playback (the same way your HDTV will do). I use a program called KMPlayer that has different deinterlace playback options.

check out this thread

http://www.hv20.com/showthread.php?t=474


media player classic, use dx9, shaders->deinterlace

[Murrelet]

I call it "Capture" because that's the term for the action in Vegas. But I get your point, thanks for the info.

[tokyo_ren]

I call it "Capture" because that's the term for the action in Vegas. But I get your point, thanks for the info.

and every other NLE package out there :hv20-smilie03:

Don't worry, I call it capture too when I'm feeling kinky :hv20-smilie06: