resolution size

[miklg21]

I have been trying to keep the original 720x480 res of a movie while converting it and I'm coming up short. The width is ok , but the height is under 480.Is there a way to keep a certain res?

Thanks

[CWR03]

Keeping 720 x 480 in nearly all cases won't result in a video that will play with a proper aspect ratio, but if that's really what you want use the Ctrl + F9 Hidden Options and check the "Override input AR" box and select "Original."

[miklg21]

Keeping 720 x 480 in nearly all cases won't result in a video that will play with a proper aspect ratio, but if that's really what you want use the Ctrl + F9 Hidden Options and check the "Override input AR" box and select "Original."

Why won't it work if 720x480 was its original aspect ratio?

[manono]

Geez, here we go again.

NTSC DVDs are 720x480, but they all get resized for playback. If the DAR is 4:3, then it gets resized to 640x480 (480 x (4/3) = 640). If it's a 16:9 DVD, it gets resized to about 854x480 upon playback (480 x (16/9) = 853.333)

So, if you encode at 720x480, unless you later set the DAR, say, using MPEGModifier, and use a player that will do the resizing, you'll be playing all your AVIs with bad aspect ratio. Here, read this:

http://www.doom9.org/aspectratios.htm

[CWR03]

In other words, 720 x 480 may be the original aspect ratio, but it will not be the correct one. When you have a resized output from AutoGK, do the characters seem stretched or flattened? If not, AutoGK is properly doing its job. Try one at a forced 720 x 480 and see how it looks and you'll see the problem.

[miklg21]

ok well I tried to do a aspect ratio to 854x480 and it came out Width : 864 pixels
Height : 368 pixels

I still don't see a way of locking in the height in the secret options.

[manono]

Two things to note; you have to make sure the DVD is really 16:9. One way to find out is to open a VOB in DGIndex and run the Preview (File->Preview). The Information screen that opens up will say at the top. Or DVD Decrypter, GSpot, Bitrate Viewer, ReStream, or a number of other apps can also tell you. Widescreen movies aren't by definition 16:9. If you read Doom9's Aspect Ratio guide, then you'll know that a DVD with a DAR of 4:3 can also contain widescreen video. But the vast majority of widescreen movies are encoded with a DAR (Display Aspect Ratio) of 16:9. And the other thing to note is that DVDs can be resized to resolutions that AVIs probably shouldn't. AutoGK quite rightly uses Mod16 resolutions. Both width and height must be divisible by 16. So, if you want to resize a 16:9 DVD as close to the resolution as a DVD player would use, then choose a width of 848.

[CWR03]

864 x 368 is roughly 2.35:1, a very common AR for a movie. Did the video look ok as far as things appearing stretched or flattened? If not, AutoGK has properly done its job. You will only muck it up by tamering with it.

If you want more direct control over the AR output, try AGKPal,

[miklg21]

The movie looked fine, I was just trying to keep the movie as close to original as possible so it looked ok on my tv. I didn't want ot to look like a clip off of youtube.
Thanks for the help and info guys.

[CWR03]

The movie looked fine, I was just trying to keep the movie as close to original as possible so it looked ok on my tv.
There's not a TV in the world with a screen aspect of 1.5:1, so keeping the original size will never be correct. What are you using to play back these files? A PC will display the proper AR regardless of dimensions, but a standalone may try and stretch a 2.35:1 video to fill the screen and will ruin the image. If you're using the latter, you may need to force 16:9 and keep the black bars in order to get the correct AR with your player.

[miklg21]

what I'm planning on doing is getting a media extender so I can watch stuff stored on my computer.

[J-Wo]

I have been using DivX 6.x with much success to create MPEG-4s with the highest resolution possible for playback on my standalone player (Panasonic S-52). For 16:9 content, I keep the original resolution of 720x480 and set the output aspect ration to NTSC 16:9. The results look great on my standalone and on my computer, but I think sometimes the DAR flag is ignored by older standalones.

Is there any way I can force AutoGK to do this as well? I can't seem to find anythin about output aspect ratio in the hidden settings.

[manono]

Hi-
Is there any way I can force AutoGK to do this as well?
No, you'll either have to set it later using MPEG4Modifier, or encode manually, setting 16:9 in the DivX setup.

[J-Wo]

how about the .aspect file that shows up in the folder I'm encoding? I'm not sure what the numbers in that mean but can I edit that file? Otherwise the MPEG4Modifier trick works fine.

[Taicho]

what I'm planning on doing is getting a media extender so I can watch stuff stored on my computer.


If its for computer playback, you want to convert it to square pixels...and you want to convert it to YUV12 colorspace...and you want to de-interlace it and convert the frame speed to IVTC.

Yes, you need to do ALL these things.

Guides are HERE (http://http://www.animemusicvideos.org/guides/avtechbeta/index.html)

Edit: But I guess your using auto-gordian knot, so its doing all that for you. I prefer the original, which lets me just RIP the source, and then do the all the above+filtering in avisynth.

It still worth worth reading the early parts of the guides in the link I provided above, so you understand basically what is going on...