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How to encode 1080p mpeg2 at 60fps on a mac?

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Eric Suquet
How to encode 1080p mpeg2 at 60fps on a mac?
on Jun 9, 2011 at 3:40:11 pm

Hello,

I need to output an mpeg2 file at 1920x1080 progressive at 60fps. All the software I've tried so far either forces it into 30fps or interlaces it. I'm on a mac and don't have access to a PC. The bit rate needs to be on the high side as well, around 25mb.

Anyone have any suggestions?

-Eric


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Craig Seeman
Re: How to encode 1080p mpeg2 at 60fps on a mac?
on Jun 9, 2011 at 4:19:05 pm

I'm curious why you have this need. Knowing the purpose of the target might help find a solution.
Why MPEG-2? Is this a Program or Transport Stream for broadcast?
Is there some device that can use 1080p60 MPEG-2 playback?



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Eric Suquet
Re: How to encode 1080p mpeg2 at 60fps on a mac?
on Jun 9, 2011 at 4:26:26 pm

A client has requested it for a large display at a trade show of some sort. It needs to be 60fps because it's an animation that has vertical lines moving horizontally. At 30fps (regardless of codec) the lines stutter and don't look good. I've inquired about them being able to use another codec, but in case they cannot, I'd love to find a way to do 60fps in mpeg2.



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Craig Seeman
Re: How to encode 1080p mpeg2 at 60fps on a mac?
on Jun 9, 2011 at 5:06:33 pm

[Eric Suquet] "It needs to be 60fps because it's an animation that has vertical lines moving horizontally"

OK so they need very high temporal resolution. Are you trying to create a Program Stream or Transport Stream, which or either?

I'm not sure what settings or software you've tried since you only make a sweeping comment about "all the software" you've tried. That's not much to go on. There's no point asking you to try software and settings you've already attempted but for all I know you're not using the right settings. You really need to provide information. We don't what software you have for example.



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Eric Suquet
Re: How to encode 1080p mpeg2 at 60fps on a mac?
on Jun 9, 2011 at 5:14:46 pm

OK so they need very high temporal resolution. Are you trying to create a Program Stream or Transport Stream, which or either?



Program stream.

I'm not sure what settings or software you've tried since you only make a sweeping comment about "all the software" you've tried. That's not much to go on. There's no point asking you to try software and settings you've already attempted but for all I know you're not using the right settings. You really need to provide information. We don't what software you have for example.


Software that I've tried:
After Effects
Adobe Media Encoder
Squeeze
Quicktime Pro
Compressor
iVideo Compressor

None of these allow me to encode with the settings that I mentioned.



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Craig Seeman
Re: How to encode 1080p mpeg2 at 60fps on a mac?
on Jun 9, 2011 at 5:28:16 pm

Thanks. Those are important details. I tend to use Telestream Episode myself. Compressor is severely limited. I'd would think Squeeze 7 would be very flexible but I can't speak first hand.

Download the free trial of Episode 6.1
Duplicate the Program Stream MPEG2 1080i60 20Mbit 16x9 preset.
Under Frame Rate filter change from 29.97 to 59.94
I assume your source is already 1080p60 Progressive so you may not need to do any other changes.

After doing the test encode check the results in MediInfo or VideoSpec. It will tell you if the file is 59.94 Progressive.



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Eric Suquet
Re: How to encode 1080p mpeg2 at 60fps on a mac?
on Jun 9, 2011 at 5:52:49 pm

Thanks for the suggestion. Followed your instructions to a t, and it still conformed it to 30fps. I'd rather not spend the money on the software even if it DID work though. My copy of sorenson is out of date, so I'm going to update it and try that. If you have any other suggestions, I would appreciate it.



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Craig Seeman
Re: How to encode 1080p mpeg2 at 60fps on a mac?
on Jun 9, 2011 at 5:59:17 pm

[Eric Suquet] "Followed your instructions to a t, and it still conformed it to 30fps"

How did you confirm the frame rate?
Please check in one of the two programs I recommended.
In fact you should check your source in those apps as well to ensure it's actually 59.94p



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Eric Suquet
Re: How to encode 1080p mpeg2 at 60fps on a mac?
on Jun 9, 2011 at 6:12:21 pm

I confirmed the framerate in quicktime. I also can SEE that it's not 60 since the lines stutter. I just checked it videospec to be safe, and it also says that it's 29.97. I know the settings were correct since the file name contains 1080i60.

My original file is also at 60.



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Eric Suquet
Re: How to encode 1080p mpeg2 at 60fps on a mac?
on Jun 9, 2011 at 6:17:38 pm

It's very odd. I just upgraded squeeze. There is a preset that SAYS 1080i60, but when I try to edit the preset it only gives 29.97 as an option.



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Craig Seeman
Re: How to encode 1080p mpeg2 at 60fps on a mac?
on Jun 9, 2011 at 6:35:44 pm

60i is 29.97.
60i is 59.94 interlaced FIELDS which is 29.97 FRAMES.

In Episode enable the Field Order filter and set it to Derive from File Format and Same as Source. If Squeeze has something similar try that as well. You want to ensure progressive frames stay progressive.

I would say 1080p60 is rare but these days I believe a couple of the large sensor cameras, Panasonic AF100, Sony FS100 shoot that I believe. I'm sure the Sony does. I do think there's a need to support this.



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Eric Suquet
Re: How to encode 1080p mpeg2 at 60fps on a mac?
on Jun 9, 2011 at 6:45:34 pm

Thanks. Didn't take notice of the "i". I tried what you suggest to no avail.
I receive the same error in both squeeze and episode when I try to set it to 60p:

invalid video horizontal size (1920)/vertical size (1080)/ frame rate (60.00 fps) combination.

Is it a codec issue? Is there a different mpeg2 encoder that I can use?



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Craig Seeman
Re: How to encode 1080p mpeg2 at 60fps on a mac?
on Jun 9, 2011 at 7:19:13 pm

It may MPEG-2 encoders, as programed, don't support 1080p60. Given that, as I mentioned, cameras are coming out that shoot that, you'd think that this would at least be on someone's drawing board.
http://en.wikipedia.org/wiki/1080p

As of 2011, there are a few consumer AVCHD/NXCAM camcorders that can capture 1080p50 and 1080p60 video, including Panasonic HDC-TM700, HDC-HS700, HDC-SD700, and HDC-SD600, Sanyo Xacti VPC-HD2000, and Sony NEX-FS100. Professional digital cinema cameras capable of capturing 1080p60 include Sony CineAlta F23 camera and Sony SRW9000 camcorder (with optional 60p processing boards installed), Sony PMW-F3 camcorder, as well as RED One camera (in 2K and 3K capturing modes).
I don't think the F3 records 60p though at least not using XDCAM EX (which is MPEG-2).

Also note
http://en.wikipedia.org/wiki/MPEG-2

The ATSC A/53 standard used in the United States, uses MPEG-2 video at the Main Profile @ High Level, with additional restrictions such as the maximum bitrate of 19.4 Mbit/s for broadcast television and 38.8 Mbit/s for cable television, 4:2:0 chroma subsampling format, and mandatory colorimetry information.
ATSC allows the following video resolutions, aspect ratios, and frame/field rates:
1920 × 1080 pixel (16:9, square pixels), at 30p, 29.97p, 24p, 23.976p, 60i, 59.94i.

No indication of a 1080p60 spec.

It looks like it's there for MPEG-4 (which would likely be H.264).
http://hd.engadget.com/2011/06/08/espns-mpeg-4-switch-provides-a-path-to-10...

Just for yucks, can you get 1920x1080 60p from an H.264 .mp4 encode?



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Eric Suquet
Re: How to encode 1080p mpeg2 at 60fps on a mac?
on Jun 9, 2011 at 7:22:27 pm

That's what I suspected.

H.264 isn't a problem. It's what I've suggested to them, we'll see what happens.

Thanks for all of your help.



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Craig Seeman
Re: How to encode 1080p mpeg2 at 60fps on a mac?
on Jun 9, 2011 at 7:44:36 pm

Nearly all the above cameras recording 1080p60 are using AVCHD (H.264) except the RED (they have their own codec) and I'm not so sure about the F3 because I've heard it does NOT record 1080p60 (and it records MPEG-2 in .mp4 wrapper natively).



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