TMPGEnc Plus Source Aspect Ratio Settings Help

[Sakuya]

I'm having some trouble choosing an option in TMPGEnc Plus. I'm not using the wizard. After I select my video source (which is an AVS file with a TextSub line to overlay subtitles), I go to "Setting", "Advanced" tab, and then next to "Source Aspect Ratio".

What is the difference between 4:3 525 line (NTSC) and 4:3 525 line (NTSC, 704x480)?

My source AVI is 640x480 which is 4:3. Then I use AVISynth to resize that to 720x480. Here is my AVS script:

AVISource("file.avi",false)
TextSub("subs.ssa") 
LanczosResize(720,480)
converttoRGB24()

So, which "Source Aspect Ratio" should I be using?

[yoda313]

Well since you set the resize to 720 you should probably use the "4:3 525 line (NTSC)" option since the second one specifically states 704 and you want 720 in your script.

[Sakuya]

But what's the difference between 704 and 720?

[FulciLives]

Just make sure you pick "FULL SCREEN" as the VIDEO ARRANGE METHOD

Because you are using AviSynth it really makes NO DIFFERENCE what you use as the INPUT SOURCE ASPECT because by using AviSynth and then "FULL SCREEN" for VIDEO ARRANGE METHOD you are basically telling TMPGEnc Plus to NOT resize.

- John "FulciLives" Coleman

[jimmalenko]

But what's the difference between 704 and 720?

Is this a trick question ?

16 pixels in width, naturally.