1 person found this helpful
Forget the nesting, just export the original sequence to the desired settings. Be sure GPU acceleration is turned on if you have it available, or of not, check the Maximum Render Quality box on export.
You don't need to place the HD sequence in an SD one. Merely export directly from the HD sequence, Choose File > Export > Media. In the Export Settings dialog box, choose a preset that matches your footage. Be sure to enable the "Use Maximum Render Quality" button. Try 2 pass VBR in Bitrate Encoding. For Minimum Bitrate, set it to 2.8. For Maximum Bitrate, set it to 8. In Project Settings, set the GPU to Mercury Playback Engine (CUDA or OpenCL) for better scaling quality.
See if that works for you.
Thanks Jim & Kevin.
Mercury Playback Engine was already enabled.
I also tried the "Use Maximum Render Quality" button and I rendered straight from the original HD sequence.
I also tried 2 VBR passes @ 50mbps.
Same problem; actually worse.
VLC snapshot here:
Be sure the export has the same field settings as the source media, likely UFF.
The original footage is progressive. It's a TGA sequence from Maya. Looks great on a full HD monitor. Nice & crisp.
But the required format for the broadcaster is MPEG-2, PAL 16x9 (FHA) 720x576, @ 50mbps CBR, Upper field first, 4:2:2 profile.
Watch the footage on an interlaced TV, not a computer monitor. Any difference?
The exported MPEG-2 file?
My Asus media player won't play it on my TV - bitrate too high, maybe?
Don't know, I don't have that.
Try a DVD with the same relevant settings.
You guys are aware that he has to export FHA arent you.
ie Squeeze his 16:9 into SD(PAL) by manipulating his PAR
Precisely. The aliasing is occuring more because of the PAR resizing, than the actual downscaling.
If I export as 1024 x 576 square pixels (which is SD 16:9 widescreen - just not FHA) then it's much better.
When I down convert from HD to SD dvd I always add vertical blur set to '3' on the blur settings on the export box. This does not seem to lose resolution but it helps with the aliasing.
Hey Richard - just tried that. Looks worse.
You guys are aware that he has to export FHA aren't you.
Did anyone find a solution for this recurring issue? I have been struggling with it for years without much success. When I compare Premiere to Smoke mac in terms of anti aliasing tools, I'll take the Smoke any day. It can do miracles. I can't see why Premiere cannot do the same.
If this was truly a scaling/aliasing issue, I would fully expect to see steppy edges on the orange telescope then, but I don't. Also, I zoomed in on the image in Photoshop and where the red claw on the left drops down in front of the pink book, the issue goes away - it is isolated to the "red meets blue" areas only. I realize this is PAL, but from years of experience with NTSC, I learned that some colors just didn't go together well, and red on blue was the biggest offender and would result in exactly the "color bleed" that I'm seeing here. I feel that the compressor/codec is not handling the sharp transition from saturated red to saturated blue.
Just a thought
Safe Harbor Computers