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Bad quality after conversion 10bit
Hi,
So im was working on my HDV project. 720p 30Frames
On a mac pro.Everything looks good on my timeline and my HD television ( which is connected trough the mini display port ) no to much/less gain, gamma etc.
But i need to burn this to a dvd.. I decided first
to use conversion and do the ” 10bit uncompressed” After that was done.
I decided first to have a look before downgrade( if thats the right word ) I was playing my footage on the television as i noticed the quality is pretty bad.. Like to much Gain and Gamma..this has nothing to do while it was recorderd on a firestore fs5.. all started after the compression..Does anybody have a tip how to solve this??
Like use x264 or AppleProRes??
Thanks!!!
grtz wayne
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3 Replies
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Did you do a software conversion to SD Uncompressed? Your post doesn’t clearly outline your workflow so I am left to guess.
The easiest way to make your SD DVD from the HDV timeline is to make a self contained quicktime movie (not conversion) using current settings. Take that QT file into Compressor and make your m2v file and audio which is then used directly in DVDSP to make the DVD. You take a big hit going from HD to SD so it is best to take just one hit and go straight from your sequence codec to the mpeg2 file that is required for DVD. Do not make an h264.
If you search this forum, this workflow is probably reposted a dozen times each month.
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I’m sorry was not clear enough..
And did not search this forum probably I guess this is because i did not know what to search for..I hope this description of my workflow is better.
I filmed a project on a Firestore fs5 DTE so what i shot was already packed as a Quicktime – 720p – 30-frames
Everything in Fcp was matching so no rendering etc.
I started editing.As i later realized the people i was filming for did not have a blu-ray player or something else to play hdv. So i had to somehow downgrade my HDV footage for a SD DVD. But i was curious how it would look like ( because this is my first time filming HD ) without or slightly compression. I was not sure which compression i should take as i always used Uncompressed 8-bit for SD i decided to use 10-Bit for HDV. After waiting a hour I wanted to playback the video in Quicktime and there i noticed it looked like there was allot of gain/gamma. Way more then the original.
Before your reply’d i used a different compression type HDV720p . The results are like the orginal and it went from 126 gig to 4.18 gig’s.
How is it possible when a file is so big and it says uncompressed it looks so bad??
While a compressed one to 4.18g looks like the original??
Thank you! I now know what to do ( and do not take such a big hit again ). I first wanted to burn it with Toast 9 because i have some issues with “connecting to background process” in Compressor.
But i will search the forum for it! And do it like it should be.
Thanks in advance!!!Best Regards, Wayne van der Horst*
*Sorry for my bad english. I’m from Holland and do not know better.
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Wayne
you shot yourself in the foot by converting the HDV to Uncompressed for the DVD, you have hit what we all call the QT gamma bug, that is caused by a mathematical rounding error in the legacy of Quicktime.
I am betting that if you try the same process again using ProRes as the conversion codec your problem should be solved and you will have more disk space to use.
gary adcock
Studio37Post and Production Workflow Consultant
Production and Post Stereographer
Chicago, ILhttps://blogs.creativecow.net/24640
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