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Premiere HD timeline downconversion to PAL SD ooutput.
Hello again!
Although my previous post was ignored… Well maybe to low on forum list. May I beg for a little more attention this time? Please!
I am running “test before buy project” on Miltibridge Pro (Win XP, 6.1.2 drv) and I found so far one major problem, actually it is very strange.
I am trying to edit (just for fun, thank`s God!) few clips taken from JVC 720p25 in HDV form. It seams impossible to watch them on SD PAL monitor (HD to SD downconvert) from BMD 720p50 Premiere project. Jerky playback now and then but overall downconvertion looks very bad (lots of vertical lines on gradients and flickers). When I use those clips on BMD SD Pal mjpeg project and downscale them on timeline it plays fine with deflick option. IMHO the better result I get using the same clips upconverted in BMD 1080i50/p25 Premiere project. This time hardware downconvertion on PAL monitor looks maybe a bit too soft but overall quality is IMHO very good. I mean Multibridge Pro outputting HD resolution on PAL monitor. I need this setup to edit in HD but PTT to Betacam SP recorder at the end. It looks like 1080 to SD is good but 720 to SD is bad.Now the main problem… While RT hits limit U need to render. Right? Now is a problem with this. Every little bit of rendered videos on HD timeline even with zero FX manipulation have strange levels shift with tendency to fall a bit to green color and again add vertical ghost lines. So “red line not rendered” portion has good color and it changes to bit greener and with ghosting lines after rendering. This “thing” is non existent in rendered file. It is only on PAL monitor and on Premiere overlay screen. Closing project, switching off HD to SD downconversion in Decklink panel and returning to Premiere and I see in Premiere overlay monitor clean (without green tint) renders.
Can U explain why is that? This seams unacceptable for me and in current state I will stop my experiments and will wait for Yours answers. Am I missing something?PS1: Have no response from BMD support.
PS2: Testing on C2D, 965p mb, 2GB RAM, 8800GTS vga. Do You know if Quadcore Intels add more edit power for Premiere with BMD card? I hear many different thoughts about it.Robert Falkowski
http://www.mmstudio.com.pl -
14 Replies
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Hi I dont have your exact same set up…but its better to get a reply than nothing and nt many here on this forum use windows…. we have a multibridge exrteme prempro2 we arent using that video format but i have noticed the down conversion is soft. I think this might actually be a premiere thing. Because when we put a big 3k or hd jpeg on the timeline and set premiere to auto fit the still it softens the image greatly. If you leave it without this option. its alot sharper. but it is very uninterlaced looking.
The grid lines you are getting sound like a hardware fault. Have you tried looking at regular dv out through the multibridge to an sd monitor just to make sure you are only getting these problems on the down conversion?
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Yes, in SD everything seams fine. In HD to SD rt downconversion I get vertical lines and green tint on renders (only outputing, files are OK!).
BTW: I asked a dealer to swap tested MBPro to the other one. Will check.
BTW: I have a decision problem with edit platform. Premiere uses multicores so poorly and FCPro (on papers) do everything realtime on new macs… Can BM-D use (capture, edit, output) any compression in SD on FCPro similar to mjpeg on Windows?Robert Falkowski
http://www.mmstudio.com.pl -
One thing you could try is changing your project setups o different setting then render the footage and see if the downconversion has interferance on those other settings. That will rule out a hardware problem if thee is no interference on the other projects.
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Hello,
You would have to look into using Pro Res on a MAC based system. the MJPEG BlackMagic codec is Windows only I believe.
Thanks,
Leo
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Tried that already. Different HD projects outputted to MBPro down converting to SD PAL give me a bit green tint on rendered parts.
Second (swapped) MBPro and result is the same :/
Strange is that rendered files are ok in fact. When down conversion is off Premiere overlay shows proper colors. They appear greenish only played via down conversion process. It seams that all HD to SD settings gives me more (unwanted of course) green level playing BM-D codecs files. Driver fault or what?Robert Falkowski
http://www.mmstudio.com.pl -
Thank You. I thought that Prores is HD only.
BTW: Is Finalcut with BM-D really so “everything HQ RT” on new 8-cores macs? May I ask for example about something like color correction? On PremierePro (running C2D oc to 3,4GHz) it kills RT instantly.
Robert Falkowski
http://www.mmstudio.com.pl -
Hello,
If you have a fast processor, memory and hard drive array then colour correcting will be very fast. I have been using the MJPEG 1280×720 on Windows and it renders very fast and I am on an AMD Dual Core 4400+ with 2gb of ram on slow Sata 1 drive.
Thanks,
Leo
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Define “very fast” 😉
In fact I want it real time, no render. As I can see it is impossible on Premiere Pro. Asking about FinalCut 🙂 I have a month to decide which platform to use Win+PPro or Mac+FC. Price is almost the same for strong configuration.Robert Falkowski
http://www.mmstudio.com.pl -
Hello,
The effects such as colour correction will be “very fast” to render, such as a 10 min clip will take just over 10 mins.
Leo
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Thank You! Indeed it seams very fast. You do mean PPro RGB color correction. Do You? 1:1 render time is nice but still not real time.
BTW: Could You check CPU performance monitor (in %) while rendering RGB color correction?Robert Falkowski
http://www.mmstudio.com.pl
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