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HELP: HOW DO YOU CONVERT 23.976FPS PROGRESSIVE TO 25FPS INTERLACED

NOSA OBAYIUWANA

NOSA OBAYIUWANA

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I have shot an advert with the Dragon at 23.976 FPS. After finishing the edit I tried using Premier CC to export to 25FPS interlaced (my delivery format). Unfortunately (due to me not knowing something I should) the advert looks awful with artefacts messing up some of the graphics (I realise a should also have shot the ad at 25FPS interlaced in the first place).

Please does anyone know how I can output 23.976 FPS progressive as 25FPS interlaced (without loosing quality).

What software will be best to achieve this?

Thanks for you help in advance.
 
NOSA OBAYIUWANA said:
I have shot an advert with the Dragon at 23.976 FPS. After finishing the edit I tried using Premier CC to export to 25FPS interlaced (my delivery format). Unfortunately (due to me not knowing something I should) the advert looks awful with artefacts messing up some of the graphics (I realise a should also have shot the ad at 25FPS interlaced in the first place).

Please does anyone know how I can output 23.976 FPS progressive as 25FPS interlaced (without loosing quality).

What software will be best to achieve this?

Thanks for you help in advance.
Click to expand...

You don't do it interlaced. It will for sure look ugly and what is the reason?

Much better to do a sound conversion. basically speed the sound to fit the sligtly shorter 25fps version. and let the frames be what they are, i.e just change the playback rate.
Not using premiere much but I think if you drop a 23.976fps clip into a 25fps timeline it will do the trick. with a popup asking you to keep the timeline in current status or change to the incoming clip.

And when people say 25fps interlaced they mean the source could be interlaced as 50i but no problem (or much better / nicer ) to put a 25p source into such container than actually do interlaced. Interlaced is something you should try to stay away from as far as possible, if you ask me.
 
Hi,
with converting frame rates I have found that there are 3 choices.

1. screw up the audio
2. screw up the video
3. buy the service from an post production house that have machines that work with magic

There is this AE tutorial that might work for you: http://www.videocopilot.net/tutorials/frame_rate_converter/

as for interlaced vs. progressive. I have ran into ad-uploading services that require interlaced video. I have no idea in the world why they require this, as it isn't very good for your video. However, turning progressive into Interlaced in Premieres export settings worked for me, and when the ads come out the television, they looked fine.

however that when playing the video on computers before uploading, you get a lot of this: https://upload.wikimedia.org/wikipedia/commons/1/19/Interlaced_video_frame_(car_wheel).jpg

I would do the first upload in progressive, and just hope it passes the check. If not, try interlaced. Also the site might have premiere export templates to download.
 
Thanks everyone.

Jirka.... Guerilla-scope (the company that places the ad on TV in the U.K) wants it in interlaced.... they are refusing to have it in progressive.

Once I convert it, I get all sorts of strange artifacts (exactly what you have shown me in the linked image)

Bjorn..... the company insists it has to be interlaced.
 
the artifacts could be because of your video player. Can you send them the file and ask if it runs ok in their system?
 
I'd use avid... Or mpeg streamclip but I'd have to play with the settings a bit

i just did a tv gig where it was a similar issue and avid was the only software that worked for me to make it cuz it was a setting redcine couldn't do...

if you copy your sequence into a Pal premiere project and export does it have the same problem?
 
Tons of standalone videoconverters & transcoders on the net.
I'd export normally out of Premiere (23.97) and convert it with something else.
 
NOSA OBAYIUWANA said:
The artifacts are definitely in the exported version unfortunately
Click to expand...

Are you watching on a production monitor or a computer monitor? You will see the interlacing artifaces on just about any computer monitor. But what happens if you watch it on a broadcast monitor througha decklink or Kona card?

David
 
Look at MPEG streamclip as well for the conversion from squared 5

David
 
I would also add that it is technically possible to pitch-correct the 4.1% speed-up on sound by processing it in Pro Tools or any other high-quality sound mixing/editing program. The sound will still run at 25fps, but the pitch of the actor's voices will sound more normal.
 
I'm not an expert on this, but you could do as Bjorn suggested (convert to 25fps, and make sure the audio keeps its pitch). But after that, what I would do is to export as progressive to a device, then take the output from that device and feed it into something like a high quality PAL video camera or a digital Beta deck. But I'm not sure why the interlace conversion should cause so much trouble. It's just splitting each frame into two.
 
Thanks everyone.... I will try pretty much everything suggested until I find something that works
 
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