encoding mpeg-2 at 720x576 PAL

[abbymat]

I captured avi at 756x576 PAL, now if i encode at 720x576 mpeg-2....will the image width be cropped from 756 to 720 or will it be resized ?

also is there any codec to encode at 756x576 and maintaing a good quality, because mpeg-2 seems to work only at 720x576 ?

thanks for any info.

[mats.hogberg]

Resized.
mpg can have any resolution, but the PAL DVD specs only allows for 720x576 (+ 2 lower resolutions - see WHAT IS top left)

/Mats

[SatStorm]

PAL allows 720x576, 704x576, 352x576 and 352x288
You have to resize your source to one of those.

[drewzor]

well 720x576 displays at 768x432 (16:9) or 768x576 (4:3).
If you set your DAR at 756x576 then on your tv you will get bars left and right.
If your leaving your mpeg converter on defaults it will resize it to a suitable display size tho. 720x576 is a SAR (storage aspect ratio)

[abbymat]

well 720x576 displays at 768x432 (16:9) or 768x576 (4:3).
If you set your DAR at 756x576 then on your tv you will get bars left and right.
If your leaving your mpeg converter on defaults it will resize it to a suitable display size tho. 720x576 is a SAR (storage aspect ratio)

sorry, I made a mistake !....its 768x576 I captured at (not 756x576), so since its a standard PAL size, will the image then be cropped or resized when its converted to mpeg-2 at 720x576 ?

now, if the image is resized, wont it be distorted ? is there any mpeg-2 codec that is 768x576 compatible....does not matter about DVD format, as it will be played only on the PC.

[mats.hogberg]

If you're only going to play back on PC, why reencode at all?
Anyway: What encoder did you use to encode your AVI to mpg? Surely it must allow you to set the resolution to anything you want? (At least to keep source resolution.)But I can imagine some "user friendly" encoder only allowing valid DVD resolutions. No matter, when you select a output resolution other than source resolution, the video is always resized, not cropped.

/Mats

[abbymat]

If you're only going to play back on PC, why reencode at all?
Anyway: What encoder did you use to encode your AVI to mpg? Surely it must allow you to set the resolution to anything you want? (At least to keep source resolution.)But I can imagine some "user friendly" encoder only allowing valid DVD resolutions. No matter, when you select a output resolution other than source resolution, the video is always resized, not cropped.

/Mats

Actually the file size is very large - 12GB for 1 hour avi, thats why I thought to reduce it a bit. Used TMPgenc, but it seems to allows only 720x576 for MPEG-2 PAL.

[mats.hogberg]

Why not reencode it to a lower bitrate AVI then? I bet you can get plenty good XviD version from it below 1 GB. Use AutoGK. XviD/DivX and other mpg4 codecs are much more efficient than mpeg2.

/Mats

[drewzor]

TMPgenc is great, it will produce a file that easily transfers to dvd and can be played on any pc with no need for codecs or special decoders.

720x576 is what they call "anamorphic", it is a Storage aspect ratio. When this footage is processed either by a dvd player or media player in your pc (in most cases for pc) it will display at 768x576.

So when you encode with tmpgenc and it creates an anamorphic .mpg it will set the SAR to 720x576 and if you then try to edit your footage in most editors it will look stretched tall... therefore you should do all your editing before enoding to mpg.

But in a nut shell, 720x576 is full screen anamorphic and can display 16:3 or in your case 4:3, tmpgenc already knows....