QuEnc encoding - check interlaced?

[paulom]

I am using AviSynth to edit video clips shot with my Sony digital camera. The camera records mpeg-1 clips at 30 fps, 640x480 resolution. Audio is mono, 32000Hz sample rate. I'm opening them with DirectShowSource without specifying pixel_type, and Info tells me colorspace is YUY2, not fieldbased, parity BFF.

I will use QuEnc to encode them as mpeg-2 to produce a DVD, so I will:
Assume 29.97 fps.
Convert color to YV12.
Limit pixel values to CCIR-601 range.
Resize to 720x480.
Resample audio to 48000Hz.

But I have a doubt, and maybe someone can help me. QuEnc has an option for Interlaced Encoding. Should I check it or not?
When I open a camera clip in DGIndex, its Information panel says "Frame Struct: Frame" and "Frame Type: Progressive" for all frames. But DGIndex help says "Please be aware that this merely describes how the frame was encoded; it says nothing about whether the content of the frame is progressive or interlaced. It is common for progressive video to be encoded as interlaced, and vice versa". I'm rather confused about that!

I have tried to encode an AviSynth script in both ways, succesfully, but I have not tried to build a DVD yet. I have noticed that progressive encoding is considerably faster.

Thanks for your attention!

[2Bdecided]

If this is a digital still camera, or something recording to a flash memory type card, then your original footage is unlikely to be interlaced.

You can make a DVD either way, and even if it's the "wrong" choice for your specific footage it will still play OK.

Progressive encoded interlaced is slightly lower quality and slightly less efficient.
Interlaced encoded progressive is the same, but with chroma errors visible in some situations.

Commercial discs are sometimes encoded the wrong way.

Cheers,
David.

[smok3]

camera records mpeg-1 clips

its progressive.

[paulom]

Thank you!
The camera is really a digital still one, recording to a flash memory card. I'll left Interlaced Encoding unchecked.
Faster and better!

[MrC]

paulom

may I suggest you to use a all-in-one software like AVStoDVD, which does automatically all the steps you described (well, a little bit more, as matter of fact)? It will make your "encoding" life easier and you can get a lot of hints from the project log files.

See link in my signature for more details.

;)

Bye