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50p in 50p out h.264?

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Callan Thomas
50p in 50p out h.264?
on Aug 9, 2013 at 3:29:41 am

I have a DVCPROHD720 50p sequence. I've opted for 50p as i need the video to have a very 'live' feel.

Now i'm trying to compress with h.264. However, in the fps options, there doesnt seem to be an option for 50 (29.97 being the max). I tried exporting 25fps, but the movie is choppy and not nice.

Am I looking in the wrong place? Is this workflow the best way to keep the 'live' feel of my video?

Callan


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Ivan Myles
Re: 50p in 50p out h.264?
on Aug 9, 2013 at 6:10:09 am

What are the export settings? You probably need to increase the Level. Select at least L3.2 for a 1280x720-50p sequence. Please refer to H.264 Levels for more information.


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Callan Thomas
Re: 50p in 50p out h.264?
on Aug 9, 2013 at 9:12:35 am

Thanks for the link. Where do I find what level h.264 I'm using? Could you reccomend any presets as a good start?

Callan


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Ivan Myles
Re: 50p in 50p out h.264?
on Aug 9, 2013 at 4:54:55 pm

What software are you using? Please post a screen capture of your export settings.

Recommendations on presets and settings require more information on the intended use for the encoded file, any known delivery requirements, and the encoding software.


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Callan Thomas
Re: 50p in 50p out h.264?
on Aug 9, 2013 at 10:35:27 pm

Thanks for your reply Ivan. Sorry for not being clearer earlier. I am working with FCP7 and Compressor.
The compressor settings I was trying were 'h.264 for apple devices'. Bit rate around 1000kbps.
Delivery is a multimedia file, framed to 640x360. This is for easy and quick internet distrubtion. However, as I mentioned, I still want to retain the 50fps live feel. It is quite likely the file will end up being displayed on a 576i (pal land) projector.

Sorry I'm away from the workstation so I can't provide screen shots at the moment.

Thank you very much.

Callan


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Ivan Myles
Re: 50p in 50p out h.264?
on Aug 9, 2013 at 11:53:45 pm

I'm going off my experience with QuickTime Pro, but I believe it's the same setup as Compressor.

- To specify 50fps, choose Custom in the Frame Rate selector and manually enter 50.

- It might be better to use H.264/MP4 for online viewing unless you plan to post to sites like YouTube or Vimeo that re-encode the uploaded file. If the latter, consider using a higher bitrate.

- Baseline Profile and Single-Pass encoding offer greater compatibility. Main Profile and Multi-Pass encoding provide better compression.

- 1000 kbps might be too low for 50 fps. Try 1500 kbps and go up or down from there, if required.

- Set Key Frame distance to Automatic.

- Enable Streaming for online viewing.


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