1280 x 1080 ??

[videopoo]

Can someone explain what 1280 X 1080 is and how it relates to 1080p video? I'm feeding an encoder a .mov file which is 1920 x 1080p and it constantly wants to encode a 1280 X 1080 file.

I can't wrap my mind around this?

[edDV]

Encoder settings.
What encoder?

1280? 1.5x1280=1920

[videopoo]

Cinevision. I'm confused here

[edDV]

What are you trying to do?

[videopoo]

I'm trying to encode a 1920x1080 VC-1 stream? Sonic support is closed but I can wait till tomorrow. Believe it or not I get better support here or at Doom9 than at Sonic.

1280x1080 is one of the output options...I feed it my 1920x1080 .mov and it always defaults to 1280x1080 and won't let me change that setting... and I can't figure out why.

I'm really just trying to understand why there is 1280 x1080? Where did these numbers come from?

[aedipuss]

what's the source of the 1920x1080p mov file?

afaik 1280x1080 isn't even an allowed resolution in vc-1

[videopoo]

Weird...no don't why that option is available in Cinevision. Not sure what the source is.

[jman98]

Weird...no don't why that option is available in Cinevision. Not sure what the source is.

Sigh. aedipuss means "What the heck are you trying to encode?" An HD TV capture? A BluRay rip? An HD DVD rip? And so on.

[edDV]

1280x1080p is a narrow H scaled version of 16:9 1920x1080p. We know that much. It seems to be in the resolution selections of Sonic Scenarist and Cinevision for MPeg2, AVC H.264 and VC-1.

Sonic resolution and frame rate spec options are listed here.
http://www.sonic.com/products/Professional/CineVision/specifications.aspx

Horizontal scaling is frequently used as the best way to reduce bit rate for stored video. 1440x1080 and 1280x1080 are particularly useful for 1080i allowing data reduction without impacting interlace.

Sonic is offering it for 1080i and 1080p as an option. I've found a few references in Google to 1280x1080p VC-1 being used for HD-DVD animation. http://www.google.com/search?hl=en&q=1280x1080+VC-1

Some common "NTSC" examples of H scaled storage are.

DV/DVD/DVB/ATSC - 720x480p, 720x480i, 352x480i
HDV/XDCAM-HD/HDCAM - 1440x1080i
DVCProHD - 960x720p, 1280x1080i

[videopoo]

Sigh. aedipuss means "What the heck are you trying to encode?" An HD TV capture? A BluRay rip? An HD DVD rip? And so on.

Sigh...It's a uncompressed 10bit .mov delivered by my client for an HD DVD title. I don't know the source of the file.


Nice Ed!! Thanks so much for the info - I've been reading some of the same links. Still kind of confused about it all. I've fed Cinevision 1920x1080 files before without this issue. I think its amazing that one might get better info, faster, on an internet forum, than from the company who sells a piece of software.

[edDV]

Do the file properties show 1920x1080i or 1920x1080p?

Your Cinevision project settings should be showing your intended resolution. The VC-1 encoder would also have a resolution setting.

[videopoo]

The file reports 1920x1080p. I found out from the guy that the original source was shot DVCProHD - 960x720p.

I had him give me 2 files:

1. the original 960x720p which encoded fine

2. a scaled 1920x1080p from the 960x720p just to test the encoder on scaled files. This is where I'm stuck understanding this. Cinevision only gives me one option once the file has been added (1280x1080).

I'll look at the encode this weekend to see what it looks like.

[edDV]

The file reports 1920x1080p. I found out from the guy that the original source was shot DVCProHD - 960x720p.

I had him give me 2 files:

1. the original 960x720p which encoded fine

2. a scaled 1920x1080p from the 960x720p just to test the encoder on scaled files. This is where I'm stuck understanding this. Cinevision only gives me one option once the file has been added (1280x1080).

I'll look at the encode this weekend to see what it looks like.

Normally DVCProHD 960x720p would be authored as 1280x720p 59.94fps