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Prores 422 Optimized by MPEG Streamclip?
Sorry if this is a dumb question, but I just bought a SONY NEX-VG10 so I need to clear this up before I get my workflow happening with this new camera.
Importing from the NEX is no problem, everything goes straight into Prres 422. But like I’ve mentioned before, the clips seem to work a LOT more smoothly if I take those Prores 422 files and run them through MPEG Streamclip to export as the same format. Can anyone explain to me why this is? I feel a bit stupid for adding this extra step (and about 30% more storage space required) to my workflow, but I do love the increase in performance. No idea how its being achieved though??
Any input would be great.
Thanks guys,
J
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12 Replies
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[Jay Evs] “But like I’ve mentioned before, “
Where? I don’t see a post on this.
[Jay Evs] “the clips seem to work a LOT more smoothly if I take those Prores 422 files and run them through MPEG Streamclip to export as the same format. “
Wait….you use Log and Transfer to convert to ProRes…and then go through MPEG STREAMCLIP to convert the ProREs to ProRes? Why? Can you describe what you mean by “more smoothly?” And you know that by doing this, you are adding yet another layer of compression to your footage? What is wrong with the clips you converted the first time?
[Jay Evs] “Can anyone explain to me why this is? “
Nope, as I have no clue what you mean.
[Jay Evs] ” I feel a bit stupid for adding this extra step (and about 30% more storage space required) to my workflow, but I do love the increase in performance. “
What increase? What is happening to make it better? I don’t understand.
Oh, and what hard drive is this footage stored on? Connected how?
Shane
GETTING ORGANIZED WITH FINAL CUT PRO DVD…don’t miss it.
Read my blog, Little Frog in High Def -
I know it sounds weird, but after using log and transfer i am not satisfied with how the clips scroll i.e. when i scroll through them with the mouse, its smooth but not liquid smooth. it lags.
But, kind of by trial and error, i realised that if i put those clips from log and transfer through MPEG Streamclip (and yes i know this compresses them again but i cant tell the difference in quality), the clips then became much more responsive.
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What are you converting to the first time? The second? How does this ADD to the file size? If they are the same compression, shouldn’t it be the same size? Are you recompressing to ProRes LT or something?
Shane
GETTING ORGANIZED WITH FINAL CUT PRO DVD…don’t miss it.
Read my blog, Little Frog in High Def -
im using log and transfer which brings the clips in from the camera’s ACVHD format and automatically converts to pores 422.
Im not sure why the Streamclip Prores 422 files are larger, i am converting from prores 422 to prores 422 (just normal full quality settings, not prores LT or HQ). I assumed that maybe streamclip has different settings somewhere to apple which made a different file size.
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Let me guess … Is your original file at 1440*1080 ? It would explain that MPEGstreamClip output is 1920×1080, so bigger and smoother (no interpolation).
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When you say “scroll” do you mean in the L&T window?
I wouldn’t worry about that.L&T the files in and have your “Capture Scratch” set up properly and your clips will play correctly.
Double converting/transcoding/compressing is not the answer.Chris Tompkins
Video Atlanta LLC -
Are you sure L&T isn’t set to convert to ProRes HQ or 4444?
What you are describing is certainly weird. -
no the origina files are indeed the same size at 1920 X 1080
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what do you mean by having my capture scratch set up properly?
I put the files exported from streamclip into exactly the same location in the scratch as where the L & T puts them. yet they behave differently.
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yep absolutely sure. i know this is weird, thats why im also confused.
does anyone else in these forums have a NEX-VG10?
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