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Exporting 1hr video with PNG codec – 26 hours exporting time!
Hi
I was wondering if anyone could help me export a 1hr PNG video file in less than the 26hrs export time I currently am faced with? The file must be PNG codec as I must preserve a transparent background for the image and animation codec would make a huge file. It is full HD 1920 x 1080p video scaled and cropped with no other effects applied, this layer is sitting below a layer with a jpeg mask. 26hrs seems unreasonably lengthy for something relatively simple like this. I have maximum bit depth deselected but am rendering at 32bit colour to preserve transparent layer. Any tips or suggestions would be most helpful.
Thanks!
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12 Replies
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Machine and storage specs?
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Hey Tero
I have a PC running window 7 64 bit Premiere pro CS5.
Core i7 processor 2.67ghz
6gb RAM.
C: drive 500gb with 251gb available
G: drive Raid 0 1tb 74gb available.Have I left anything out?
Thanks
Dan
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Have you checked your drive read/write speeds?
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Hey Tero
No, how would I go about doing that?
Cheers
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Actually I’ll take that back, the disk speed doesn’t matter that much.
I have a similar machine except it’s a Mac, the i7 is 3,4Ghz, it has 16 gigs of RAM and a thunderbolt raid with 500 MB/S read and write. Encoding an hour of full HD PNG Quicktime would take me about 9-16 hours (on the render estimate) so it could easily take 26 hours.
I’d suggest getting the DNxHD Quicktime codec and trying that. It works on any OS and can hold alpha information.
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Ok thanks anyway. I did manage to get the time down to around 15hrs although in reality it was exporting for 18hrs. I made sure the timeline was completely rendered and selected “use previews” in the export settings, I also deselected “maximum render quality” but not sure if that made a difference, edges do look a bit rough on the resulting clip. I guess it’s time to buy more RAM and maybe a new graphics card. I have a GTX 285 but it seems to struggle with the Mercury Playback Engine.
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You definitely want more ram with the MPE. 12GB would be minimum with 24GB ideal on that system. A 660TI or 760GTX would be the video cards to look at.
Eric-ADK
Tech Manager
support@adkvideoediting.com -
Thanks for the tips Eric.
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[Tero Ahlfors] “I’d suggest getting the DNxHD Quicktime codec and trying that. It works on any OS and can hold alpha information.”
I think using DNxHD is very good advice.
PNG is tremendously slow to encode due to its DEFLATE compression scheme — the same compression used in .zip files. Just look at how long it takes Photoshop to save out a PNG file, or sending an image to a compressed folder.
Walter Soyka
Principal & Designer at Keen Live
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
RenderBreak Blog – What I’m thinking when my workstation’s thinking
Creative Cow Forum Host: Live & Stage Events -
Thanks Walter, do you know if dnxhd is avaiable for premiere pro cs5? I can only find references to CS5.5 online.
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