to interlace or not to interlace ...

[thoralf]

Hi there,

a quick question: is it advisable to encode content for dvd authoring interlaced? In this case, I'm about to author a DVD that will contain super8-footage captured via a dv-cam (acting as a frame server). I've read a few posts on the dv capture forum, their bottom line was "If the content is to be watched on TVs, do interlacing, the only case in which you don't do interlacing is when the footage is to be watched on the computer and nowhere else". Now I'm wondering that PAL DVDs are usually progressive, so why should I interlace my content that is progressive in the first place?
It would be great if someone could fill me in here ...

Cheers,
Thoralf.

[A380]

If you have an interlaced video, than leave it interlaced. If you have a
progressive video, than leave it progressive.

For example:
If you have an interlaced DV CAM, then you get an AVI that is interlaced, encode this as an interlaced MPEG2 video file and burn that via your authoringsoftware onto DVD. The TV plays back the interlaced content, as it only works that way. On PC, your Playbacksoftware (PowerDVD, WinDVD, or whatever) will do the deinterlacing during playback. (For TV the fieldorder must be set correctly, otherwise it'l not look any good....)

If you have a progressive DV CAM, then you get an AVI that is progressive. Encode this as a progressive MPEG2 video file and burn that via.......... DVD.


So I don't know if your DV-CAM is interlaced or progressive, but I guess it's interlaced. So in this case encode the AVI you get from the DV-CAM into interlaced MPEG2.

[thoralf]

Hi A380,

thank you for your answer ...

Originally posted by A380
So I don't know if your DV-CAM is interlaced or progressive, but I guess it's interlaced. So in this case encode the AVI you get from the DV-CAM into interlaced MPEG2.

Nope, it's progressive, since I only used the dv cam to capture the frames (no tape involved), which was done without interlacing. So I guess I'll be encoding without interlacing, right?
Do you have any idea how interlacing influences compressibility (mpeg2-wise) ?

Thank you,
Thoralf.

[gooki]

sweet f all difference in encoding between interlaced and progressive (size/quality wise)