Weird thing

Sebaz wrote on 10/4/2008, 9:03 AM
I can't remember if this happened in 8b, probably not because I started realizing it was happening after I installed 8c. What happens is that many events that came directly from AVCHD takes from my Canon HF100 show a frame going backwards at the end, so I have to trim that frame. Or in some instances it doesn't go backwards but it's like a frozen frame. Is anybody else having this problem on AVCHD footage?

Comments

tcbetka wrote on 10/4/2008, 6:15 PM
Not sure exactly what you mean, but I just checked the 6 clips I recorded on my Sony SR11 today. I just got the camera yesterday, so these are actually the first 6 clips I've ever recorded with it--but they are all AVCHD. I don't see any frame-freezing or reversal of frames at the end of any of the clips. But I guess I am not quite sure what you mean by "frame going backwards at the end" though. However all of my AVCHD clips play just fine from start to finish.

But while we're talking about AVCHD, have you had any problems getting Vegas to process AVCHD clips (importing, editing or rendering to MPEG-2)? I was sort of preparing myself to have to buy UpShift, but so far, so good. Keeping my fingers crossed here anyway...

TB
Sebaz wrote on 10/4/2008, 7:53 PM
But I guess I am not quite sure what you mean by "frame going backwards at the end" though. However all of my AVCHD clips play just fine from start to finish.

Well, let's say your take consists of a person walking towards you and you cut when the person is still walking. What happens with my takes is that at the end there's a freeze frame and then another frame that is basically a repeat of about three or four frames prior, giving the impression that it goes backwards.

But while we're talking about AVCHD, have you had any problems getting Vegas to process AVCHD clips (importing, editing or rendering to MPEG-2)? I was sort of preparing myself to have to buy UpShift, but so far, so good. Keeping my fingers crossed here anyway.

Vegas has a lot of bugs when it comes to pre-rendering and exporting, if you setup a pre-render template, choose AVI and the Huffyuv at about half the size of the Vegas monitor on your layout, for example 800x450. If you choose a MPEG 2 template, you can do a couple of pre-renders and then it won't work anymore until you restart the program.

For exporting as MPEG2 HD, it's not totally buggy, but some effects are messed up, such as cross effect blur, which produces a weird strobe effect instead. It doesn't do it every single time though, but many of the times you render.
UlfLaursen wrote on 10/4/2008, 9:00 PM
Hi Sebaz

How long is your shoot time pr. clip? As you may know the camera cuts into 2GB files at aprox. 15 min. dur. if the clip is longer. If you join theese files togeter directly into Vegas, you have strange things happen where they meet.

I use the Imagemixer 3 SE that came with the cam to join the files to one big, and then there are no probs at all.

This problem is not only with Vegas but in general. WolgangS wrote about this in another post reg. Canon HF somewhere.

/Ulf
Christian de Godzinsky wrote on 10/5/2008, 2:36 AM
Hi Sebaz,

I have exact the same problem !!!

8.0c and AVCDH clips (of ANY length) from my SR12 (not all of them, but TOO many) have just the problem you describe, the last frame of the clip seems to belong a frame or two eariler in the clip.

I first did not notice this, but started to wonderhow some cuts had a strange stuttering effect. Then I noticed the problem.

Now how it seems I have to cut almost from every AVCDH clip the last frame(s) to get a smooth cut.

I'm in PAL-land, and on Vista 64 with a quad core.

This is for sure an 8.0c problem, I never saw this happen in 8.0b!!!

I got used to the fact that HDV clips had a similar problem at the end (the Sony capture...well... no use to start to cry about that problemhere), so I had an easy time to adjust myself doing this.

However, an application with the test PRO in the name SHOULD NOT do this. This for sure is not a capture problem, its just a simple file. Or is the problem at the camera end? I have NOT noticed any problem here when the Sony SR12 plays back the material via HDMI. And then, 8.0b worked fine.

How many else can see the same last frame bug in AVCDD???? ???? ???

WIN10 Pro 64-bit | Version 1903 | OS build 18362.535 | Studio 16.1.2 | Vegas Pro 17 b387
CPU i9-7940C 14-core @4.4GHz | 64GB DDR4@XMP3600 | ASUS X299M1
GPU 2 x GTX1080Ti (2x11G GBDDR) | 442.19 nVidia driver | Intensity Pro 4K (BlackMagic)
4x Spyder calibrated monitors (1x4K, 1xUHD, 2xHD)
SSD 500GB system | 2x1TB HD | Internal 4x1TB HD's @RAID10 | Raid1 HDD array via 1Gb ethernet
Steinberg UR2 USB audio Interface (24bit/192kHz)
ShuttlePro2 controller

Sebaz wrote on 10/6/2008, 9:34 AM



Well, this happens on small takes that are far less than 1 GB. A 10 or 20 second take will do this, and I imported them using the new transfer feature in Vegas 8c.
TheHappyFriar wrote on 10/6/2008, 10:03 AM
I've seen similar with my HDV but it always looks like a dropout or stop was & that point & the i frames are borked. IE maybe no i-frame @ the end of a file for some strange reason so the end frame is the last i-frame?

It hasn't impacted me YET because I've been trimming the start & end of all my clips, by complete coincidence. But I think I've seen the same thing happen with mpeg-2's I've ripped of DVD's.
Sebaz wrote on 10/13/2008, 4:45 PM
Has anybody else seen this problem? I'm seeing it in pretty much all the AVCHD footage I import into Vegas, and I don't think it was in 8b.