Nero Vision - Lines When I Scale Videos?

[Mister_M]

If you know, that it is NTSC, you should set the file format options in Vision's capturing window to NTSC (it seems as if it's standardly set to PAL). When creating your Video-DVD, you should be sure to change the recording format options as follows: Set the Encode Method to "2-pass (high quality)" and the "speed/quality" slider to at least 80 (better 100). Then create that DVD.

[Metalhead1987]

Ok, you're still not understanding my question.. I am doing everything your already saying... I transfer the videos at the highest quality and all that, the input is NTSC, the output is NTSC, the only difference is that they're scaled.

Ok, last example.. The input was NTSC - 720x480 (4:3) 29.97fps 9000Kbps
Here is the Original video for proof:

http://www.mediafire.com/?h7bef9pi9w1vjfc

Here is the scaled video with the lines/boxes problem. I've actually kicked up the brightness so you can see the lines better, that way you don't have to adjust the brightness yourself:

http://www.mediafire.com/?5nh7n1zwzusndhr

The output is NTSC 720x480 (4:3) 29.97fps 9329Kbps.

This is NOT a PAL to NTSC problem! How can you explain to me how I can scale this video and not get the boxes all over the screen? That's all I'm trying to figure out...
I get these boxes with whatever I scale, I can transfer files from PAL to NTSC with no problem at all, no lines, no dropped frames, no boxes.. Until I scale the video, then I get lines/boxes.

This post has been edited by Metalhead1987: May 14 2012, 08:16 PM

[Mister_M]

The videos obviously don't have the same video bit rates. The original video has a constant bit rate of 9000 kbps, the scaled one has a variable video bit rate of 6032 kbps (with a maximum peak of 9330 kbps). Nero Vision is only able to produce DVDs with a max. of 8000 kbps. I can see a few more compression artifacts (I think that are the boxes that you mean all the time), but only if I look very closely to the video (only a few centimeters away from the display) and only in dark scenes.

By the way: If your input and output file shall possess the same resolution and the same bit rate, where's the scaling factor then?

Here's my mpeg-2 export of Nero (user-defined MPEG-2 profile with 6620 kbps (chosen 9000 kbps in the profile) and it's "only" 1-pass encoding): https://rapidshare.com/files/799397356/Export.mpg

Don't tell me, that you can see those boxes there, since I don't really see a difference to the original.

[Metalhead1987]

No, I don't see the lines in your export, but then again you didn't scale & crop the video.
Okay, so you're telling me the original has to be the same bitrate as the output file, then the boxes/lines will no longer be there? That's the solution?

[wither]

Wow- I still can't clearly see lines and boxes or black lines. Maybe the resolution of my screen is too high. I played them in Kwik Media and Nero Video and also ShowTime.

I noticed that the scaled video is not as sharp as the original but, if you're scaling up, that and the other artifacts you're seeing are probably pixelation which one would expect. You might be able to sharpen the scaled video using the Sharpen effect.

Please tell me the version of NV you're using. Tell us exactly what you're doing when you "scale". We might have a terminology issue.

Looks like we're all responding at once. :)

[Mister_M]

No, I don't see the lines in your export, but then again you didn't scale & crop the video.
Okay, so you're telling me the original has to be the same bitrate as the output file, then the boxes/lines will no longer be there? That's the solution?

Well, if I'm honest, I'm extremely confused now... I think, that I don't understand you right. You uploaded the original video with a resolution of 720x480 and the output file also with 720x480. Before you said, you wanted it in that resolution. So I output it to 720x480.

If you want to crop the video please tell me to what resolution.

Like wither, I don't really see lines or boxes, when in normal viewing position. My IPS-Panel has a resolution of 1920x1080, therefore I just tested it on my notebook with 1280x800 pixels... On both no lines or big boxes/pixelation/compression artifacts.

And yes, the video bit rate plays a key role when it comes to picture quality. The lower the bit rate the worse is the picture quality.

[Metalhead1987]

Honestly I just give up.. I can't seem to explain this, even though it's pretty explanatory. I'm going to try some different programs, even though I've been using NV for ages... I'm just tired of this single problem. I suppose I'm too picky or whatever.

[wither]

The only problem I have is that you're not providing the information I requested so that I can try to reproduce your problem and possibly help. Note that you can always ask tech support about your problem. All of us are volunteers.

[TailorSmurfNY]

Hi Metalhead1987,

You can contact ourTechnical Support using the direct e-mail address: techsupport@nero.com


Once got your email, we will ask your for some details about your problem, then analysis for you and provide you the proper solution.

Alternatively, you can also get in touch via the chat line first.
http://www.nero.com/eng/support-contact.html

Best regards,
TailorSmurfNY



This post has been edited by TailorSmurfNY: May 16 2012, 04:09 AM

[hg-dude]

And yes, the video bit rate plays a key role when it comes to picture quality. The lower the bit rate the worse is the picture quality.

Mister_M, basically, this is like. But there are cases where with a smaller bit rate a better playback quality is achieved as with the highest possible. I made this experience in the digitization of my (S)VHS and Video8/Hi8 materials, whose capturing in MPEG-2 with the setting of "High Quality" (8'000 kb / s) took place. The quality of the material equal wide going exactly which that of the original, that is, the videos contain all defects of the original (noise, "ghosts" images and color shift on vertical edges), which were sometimes even strengthened (more visible in playback)..

The discovery that I could at least partially resolve the shortcomings at a lower bit rate, was pure coincidence. Because I took a video of almost 2 hours length not with "High quality" on a DVD-5, I trying it with "Fit to Disk". So the bit rate fell to about 5'200 kb/s. Surprise than at the plaayback, there were defects significantly tempered, yes the noise had virtually disappeared. Since then I do a test first with a lower bit rate if I deal with this stuff to a DVD. Lateron additionally I found that also in frame sizes under 720 x 480 a lower bit rate does improve image quality.

The only fix that I had to make was raising the volume when it were VHS originals. It has been reduced by the lower bit rate (quiet parts were barely audible). I can not explain to me, why this is. But anyway, only the result of a solution is important for me.

hg

[Mister_M]

The discovery that I could at least partially resolve the shortcomings at a lower bit rate, was pure coincidence. Because I took a video of almost 2 hours length not with "High quality" on a DVD-5, I trying it with "Fit to Disk". So the bit rate fell to about 5'200 kb/s. Surprise than at the plaayback, there were defects significantly tempered, yes the noise had virtually disappeared.

This is one of the effects of the lower bitrate sometimes, that's true, but only in some cases. Due to the decreased bit rate, there can only be stored less information for each picture (you can also see that, when recoding new and high quality videos to a lower bit rate. The picture gets less detailed / more "blurry"). This lower information can lead especially in old videos with less sharpness / low picture quality to a better picture quality, because for example the grain and noise isn't recognized anymore, some small defects, which were present before, dissappear thanks to the decreased picture information stored in the bit rate.

But the problem here is different (tested it with even low bit rates). When you take a look at his sample videos, you will recognize, that they are a bit noisy, which is totally normal for old VHS videos. The difference in his edited videos is the block artifacts (even if they are extremely small and rare in my opinion), which definitely is the result of the lower bitrate. I have tested that with a few encoding settings.

[hg-dude]

I don't understand what he is meaning with "scale". But it seems to me from the first screen shot, that the picture is horizontally compressed. Furthermore is not known which video mode the original source has, may be it's PAL (DVD). All this can lead to the problem he has.

I didn't analyze his video because this make no sense. You can not reconstruct such a problem in another environment, it's not the question of "blindness" (I don't like such formulations in users comments !).

Sorry, but I have decided no longer supporting this thread.

[Mister_M]

That are the questions I had, too (for example what he meant with "scale"). And they weren't answered, so that I couldn't help any further.

[hg-dude]

No reaction from the user. I think this thread is asleep.