Another 1080i HDV Slowmo conversion...

[Elton]

In case you want to try one more render, below is my recipe. I would recommend exporting to 10 bit uncompressed and then re-rendering into your HDV timeline, or better still, put your HDV edit of the film into a uncompressed 10 bit timeline and insert the clip where it needs to go. Export a final uncompressed self-contained QT of the finished edit and encode for distribution from there.

--Here's how I do it in FCP:

--Drop a 1080i clip into a custom uncompressed 1920 x 1080 60p (actually 59.94 timebase...seriously!) sequence.
--Apply Nattress Standards Conversion Filter
--Select "Map Frames" and then choose "Fields to Frames HQ"
--You'll be prompted to drop the original clip from the bin into the image well of the filters tab

Export the clip as a self-contained QT movie, bring it into Cinema Tools and conform the frame rate to 23.98 (from 1080 60p) and then scale and recompress to whatever codec you're editing in.

btw, the Nattress plug-in choices should look like this:

HTH,

B

 

[themusic]

Elton,

What do you mean "1920 x 1080 60p (actually 59.94 timebase...seriously!) sequence"? Would you please post a picture of that window as well.

1,000,000 thank you's

 

[Elton]

The idea is that you can scrub a clip and see the rendered change of a 1080i field converted to a 1080 progressive frame. Fields to frames makes sense in a 1080 60p timeline.

It works especially well in an uncompressed timeline to see the changes and not induce recompression.

 

[Robert Sanders]

Hey Barlow - is that your Sheltie? I have two Shetland Sheepdogs myself. My favorite breed.

 

[themusic]

Sure, but when I place my captured 1080i hdv footage onto the 1920x1080 timeline, I have black bars on the right and left. I'm rendering a 30 second clip now to an uncompressed 10bit quicktime. With my 2.5 ghz duel g5 it's taking about 20 minutes. I shot 20 minutes of 1080i footage thinking these were the sequences I wanted in slow motion. I'm a little nervous. I guess I should either let it conform overnight ... or edit the footage on a 1080 60i timeline and then just convert the "select" clips.

Any advice? Thanks again.

 

[themusic]

Scored by the band of the same name?
My favorite breed as well!

 

[Elton]

Is your uncompressed timeline set to square pixels? Make sure PAR is square.

 

[Elton]

Scored by the band of the same name?
My favorite breed as well!

Ha ha, no I just ripped the name for a title.

It's a dog's existential/zen meditation. Encoding right now.

My other title was "Ghost Dog II": The Way of the Sheltie". hehe

 

[themusic]

Where do I "scale and recompress"? Do I do it in FCP?

Thanks again ... I'm getting close.

 

[Elton]

You can drop it in an HDV 24p timeline, or any format you choose. It can intercut *ok* in a 1080 format, but it looks best downscaled to 720p. I've found it also looks pretty good at an in-between frame size like 1600x900. It all depends on what you want your final output to be.

Most of the time I use MPEG Streamclip to scale the footage and re-encode to whatever format I need.

Try rendering the uncompressed slowmo clip in your HDV timeline and see how it looks.

 

[Kirock7]

Nuts! I wanted see your vid's but: Account for domain realm.cc has been suspended

 

[themusic]

Last Question. 4 minutes of video is over 80 gb using the 10bit uncompressed setting. I tried exporting as a hdv file in a 59.94 timeline but cinema tools wouldn't conform it.

Is there a format I can use other than 10bit uncompressed that is smaller and renders more quickly ... that cinema tools will also conform?

Thanks again.

 

[Elton]

I use the Sheer codec. Download the demo: www.bitjazz.com

It's about 45 MBs for full 1080i 29.97 and 720 60p. Much less than the full uncompressed codec, but it's actually lossless and provides the same quality.

If you need much smaller file size I would opt for PhotoJPEG @ 75% quality.

Edit: forgot to say that Cinema Tools can only conform Intra frame codecs. HDV is Interframe with dependencies from one frame to the next.

That's why I say it's best to intercut a finished slowmo shot into an HDV edit that's been converted to an excellent intermediate codec such as Sheer. The goal is to avoid another pass of HDV compression on the material before it's ready for distribution encoding.

 

[themusic]

... and which setting in the sheer codec would you use Mr. Elton?

 

[gumonstro]

the link is down. is there any other way to watch this video?

 

[Elton]

... and which setting in the sheer codec would you use Mr. Elton?

If I'm converting 60i to 60p, I simply choose the Sheer 4:2:2 8 bv codec (HDV is already 8 bit video) and pretty much everything else would be the same. 1920 x 1080, 59.94 timebase etc.