Posted Fri Dec 14, 2012 5:31AM
Hi, I am new. I was wondering if it was common to submit mp4 animation movies for approval or does it have to be mov?
I find when creating a mov from an mp4 the quality reduces.
I would really apprciate the help.
(Edited on 2012-12-14 05:31:28 by andradechristo)
Posted Fri Dec 14, 2012 7:21AM
iStock currently only accepts MOV files encoded as either Photo JPEG for progressive files (which is what you want for animation) or Motion JPEG A or B for interlaced files.
Posted Fri Dec 14, 2012 9:33AM
You should not create a mov from a mp4 animation at all. Instead, work at the highest quality possible (preferably uncompressed) and make the step to Quicktime JPEG at last.
MP4 is bad quality for editing or grading, which is what you're customers will want to do. Quicktime JPEG at 95 or higher is much better than MP4. (but only if the source material is of high quality)
edit: With Quicktime JPEG I mean Quicktime Photo JPEG.
(Edited on 2012-12-14 09:34:14 by Ultrastatic)
Posted Sat Dec 15, 2012 5:49AM
I can only export my animations to MP4. Can i Achieve a high quality accepted Mov file? if so how?
many thanks for all your help!!
Posted Sat Dec 15, 2012 11:07AM
What software do you use for your animations? Seems weird that mp4 is the only option.
Exporting to a very high bitrate mp4 and convert that to a mov would be the workaround. But you will loose some quality.
Posted Mon Dec 17, 2012 2:55PM
I have no idea where you people get the idea that you would EVER want a motion JPEG formated file. Maybe in 1995 and you really love banding.
Posted Tue Dec 18, 2012 12:21AM
PhotoJPEG, not Motion JPEG.
But yeah, banding is an issue. Even more so with MP4, because with PhotoJPEG you can "fix" this by adding some noise, but MP4 removes noise.
I started to create a conversation about this a few months ago, but apparently nobody cares: QT JPEG and Banding
(Edited on 2012-12-18 00:22:23 by Ultrastatic)
Posted Tue Dec 18, 2012 8:47AM
What would be a reasonable new codec? ProRes is out because it's Mac specific. H264 is really only meant for end distribution (yes, I know it's in your camera, but nevertheless) throws away too much data. The Animation codec used by Adobe's After Effects or Cineon sequences would create unfeasibly large files. So what else is there? Some kind of PNG variant?
Posted Wed Dec 19, 2012 2:50AM
OpenEXR frame sequence perhaps. JPEG2000 supports 16bit.
There seems to be an open source ProRes encoder for pc.
(Edited on 2012-12-19 02:54:25 by Ultrastatic)
Posted Wed Dec 19, 2012 6:27AM
JPEG2000 sounds promising. Anything that's frame sequences would be awesome but I suspect the huge amounts of data won't work with current bandwidth limitations.
Posted Wed Dec 19, 2012 7:55AM
Sadly Quicktime cannot do JPEG2000 in 16bits/channel. But nevertheless, a jpeg frame sequence is not larger than when it's in a quicktime container. And this goes for all image sequences.
Some codecs also have interframe compression which make them a lot smaller but also not very good (slow) for editing. MP4 comes to mind.
OpenEXR has several choices for compression but the resulting frames are a bit larger than the JPEGs. Since we're only selling short animations (10 to 30 seconds) filesize shouldn't be an issue. (few hundred MB per animation) Quality would be a lot higher.