help!!! HDCAM 1080i –> DVCPROHD 270p –> HDCAM 1080i ???

[Walter Biscardi]

Why are you going to capture DVCPro 720 and then go back to 1080i?

I would capture DVCPro HD 1080i to stay in the native format.

BUT if you own a Kona 3, you can convert the 1080i to 720 on the way in. Edit in 720 and then convert back to 1080i on the way out.

I’ve edited 720 material and converted to 1080i with zero issues but we’ve never taken 1080i material and converted it to 720 on the way in. I don’t think there will be any issues, but I’m not sure why you want to cross convert twice. Would be much easier to just stay in 1080i the entire way and just convert to DVCPro HD 1080.

Walter Biscardi, Jr.
https://www.biscardicreative.com
HD Editorial & Animation for Food Network’s “Good Eats”

“I reject your reality and substitute my own!” – Adam Savage, Mythbusters

[Oliver Peters]

You really should test this path before committing to it. There may be some quality issues due to the conversions and scaling taking place. An alternative might be to stay 1080i but use the DVCPROHD codec during post. Your drive array will support this.

Sincerely,
Oliver

Oliver Peters
Post-Production & Interactive Media
Orlando, FL
http://www.oliverpeters.com

[Walter Biscardi]

[Oliver Peters] “There may be some quality issues due to the conversions and scaling taking place.”

There’s zero quality issues converting 720 to 1080i on the way out through a Kona 3. Quality is stunning actually and this is how we’re providing masters.

Walter Biscardi, Jr.
https://www.biscardicreative.com
HD Editorial & Animation for Food Network’s “Good Eats”

“I reject your reality and substitute my own!” – Adam Savage, Mythbusters

[Oliver Peters]

Walter,

I’m concerned about the hit going in. 1080i->720p. Especially if the DVCPROHD codec is used on 720p. Then you are round-tripping this by going 1080i->720p->1080i, in effect using 720p as an intermediate stage. I’ll admit it might look OK, but without actually testing this and comparing it to the results of 1080i->1080i, I wouldn’t make the assumption that it is fine. In my HD work, I don’t find repeated passes through 720p with DVCPROHD as acceptable for final results, but I have been happy with it when used on 1080 content. I think this has to do with how the image is scaled when this codec is used. I agree that 720p->1080i looks good. I do it myself with Varicam material.

Sincerely,
Oliver

Oliver Peters
Post-Production & Interactive Media
Orlando, FL
http://www.oliverpeters.com

[Walter Biscardi]

[Oliver Peters] “I’m concerned about the hit going in. 1080i->720p. Especially if the DVCPROHD codec is used on 720p. Then you are round-tripping this by going 1080i->720p->1080i, in effect using 720p as an intermediate stage. I’ll admit it might look OK, but without actually testing this and comparing it to the results of 1080i->1080i,”

I don’t think there will be much of a hit, but there’s really no reason to do this cross convert if you’re going to work in the DVCPro HD codec. File sizes are so small I would bring in the media at 1080i and stay in 1080i.

I was just pointing out that our workflow is the show is shot in 720p so I keep it at that size until mastering where I allow the Kona 3 to convert everything to 1080i.

Walter Biscardi, Jr.
https://www.biscardicreative.com
HD Editorial & Animation for Food Network’s “Good Eats”

“I reject your reality and substitute my own!” – Adam Savage, Mythbusters

[Gary Adcock]

[Jacob Kim] “if caputuring and editing HDCAM 1080i soruce by DVCPRO720p and output to HDCAM 1080i by AJA Card,”

jacob,

this workflow will be rejected by virtually every network because none of them want you to transcode between frame sizes multiple times.

Edit in DVCPROHD@ 1080 and stay there.

gary adcock
Studio37
HD & Film Consultation
Post and Production Workflows

Order my DVD’s are at
https://www.rastervector.com/dvd/dvd.html

[Tony]

Walter,

The worst thing to do is cross convert twice i to p and p to i regardless of what converter is used. I have tested this several times and the results sucks in my professional judgement.

P to i much better but multiple times i to p or p to i and back to p should be avoided.

Staying as close to native all the way thru editing and saving the cross conversion to the final output is the best route to use.

Another thought is the original poster desires to edit in 720P they should have considered shooting in 720P and editing in dvcpro HD 720P natively and outputting to 1080i at the end much better results.

Tony Salgado

[Jacob Kim]

Thanks for everybody’s kindly answers.

Jacob Kim
in South Korea
Independent Producer