Transcoding Times

B

Bryan_Lawler

Well-known member
I have found info on transcoding file size:
ProRes 422 uses different bitrates for different resolutions and sizes. It also uses
variable bit rate encoding, so these are theoretical maximums:

720p/24 - 66 Mbps - 8.25 MB/sec - 0.495 GB/min
720p/30 - 84 Mbps - 8.25 MB/sec - 0.615 GB/min
720p/60 - 166 Mbps - 20.75 MB/sec - 1.22 GB/min
1080p/24 - 132 Mbps - 16.5 MB/sec - 0.967 GB/min
1080p/30 - 166 Mbps - 20.75 MB/sec - 1.22 GB/min
Click to expand...

But, what are the average on transcoding times (per minute) to bring it into FCP?

Thanks,

Bryan
 
That depends completely on how powerful your machine is. I'm on Windows so I can't give you FCP numbers, but with Premiere I encode at slower than real-time on my laptop (2.5Ghz Core 2 Duo). My friend's quad-core 2.6GHZ desktop encodes at faster than real time, if I recall correctly.
 
I have an original MacPro (2.66GHZ with 2 dual core processors) and for me it takes about 20-25 minutes to bring in one hour of footage.
 
I have a MacBookPro (2.2 GHz Intel Core 2 Duo with 2GB 667 SDRAM).
I've shot mainly 720/24 and 720/60 footage.
It usually takes 'less than real time' to transfer clips to the computer.

I tried both using a USB card reader and connecting the camera to the computer directly, and there was no difference. For some reason I thought that the latter would be faster, but no.

Here are some numbers:
- a 05 second clip took 05 seconds
- a 10 second clip took 09 seconds
- a 20 second clip took 18 seconds
- a 30 second clip took 26 seconds
- a 60 second clip took 57 seconds
- a 2 minutes clip took 1:42 (1 minute 42 seconds)

So there you have it, "less than real time" for me.
 
kabokuti said:
I have a MacBookPro (2.2 GHz Intel Core 2 Duo with 2GB 667 SDRAM).
I've shot mainly 720/24 and 720/60 footage.
It usually takes 'less than real time' to transfer clips to the computer.

I tried both using a USB card reader and connecting the camera to the computer directly, and there was no difference. For some reason I thought that the latter would be faster, but no.

Here are some numbers:
- a 05 second clip took 05 seconds
- a 10 second clip took 09 seconds
- a 20 second clip took 18 seconds
- a 30 second clip took 26 seconds
- a 60 second clip took 57 seconds
- a 2 minutes clip took 1:42 (1 minute 42 seconds)

So there you have it, "less than real time" for me.
Click to expand...

Hi,

Are you talking about the time spent moving the mts files onto the machine, or transcoding them into ProRes?
 
Last edited:
I am running a Macbok Pro, 2.4 gHz, 4 GB ram, and it is taking me a consistent 1.5 times to transcode to ProRes (90 minutes per 60 minutes raw AVCHD). I am disappointed in that, are you saying you get better than real-time on a 2.2 gHz machine? Is that for transcoding to ProRes?
 
For me, on an original 2.66 dual Mac Pro, I copy the card's PRIVATE folder to my desktop first; for an hour of footage, this will take 3-4 minutes.

For the actual transcoding to Pro Res, which is done via Log and Transfer, the same hour's worth of clips will take 20-30 minutes, at which time they show up in my Capture Scratch folder, and in my FCP browser, ready to edit.
 
I get about 1.2-1.4x times, its not real time for me either and I'm running the same set up about as you Country...feel your pain.
 
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