Tagged with upsampling - Personal View Talks http://personal-view.com/talks/discussions/tagged/upsampling/feed.rss Thu, 07 Nov 24 09:56:51 +0000 Tagged with upsampling - Personal View Talks en-CA Upsampling/Upconverting beneficial before editing footage? http://personal-view.com/talks/discussion/5995/upsamplingupconverting-beneficial-before-editing-footage Sat, 02 Feb 2013 20:22:40 +0000 matt_gh2 5995@/talks/discussions Would love to hear opinions on whether there is any significant benefit of upconverting/upsampling footage before editing and color grading. I'm relatively new to editing, so all opinions and knowledge is much appreciated. I'm wondering if GH2 1080P footage would benefit from upconverting it to 4k before editing...i.e. would it hold up better in grading and could it be pushed further before the image starts breaking down? Also wondering if it's possible(as talked about in Windmotion thread) and advisable to upsample GH2 1080P footage to 4:4:4 before editing...i.e. does this too help with better results in grading?

I edit in Adobe CS6 with access to all programs (Creative Cloud) such as Premiere Pro, After Effects, Speedgrade, etc.

]]> Which GH2 hack/patch suitable for Avisynth path? http://personal-view.com/talks/discussion/3390/which-gh2-hackpatch-suitable-for-avisynth-path Mon, 28 May 2012 17:04:09 +0000 crunchy 3390@/talks/discussions In about a week I'll take a video of one show. Each year I am doing it and each year I am facing some problems. Last year I had broken Chroma Upsampling problems with Sony Vegas and Edius with GH1 footage, this year I'll probably face lower colour resolution problems with GH2.

Namely, I thought that GH2 native progressive files (24H or 24L) will solve all the problems with Broken Chroma upsampling which I experienced with GH1 "interlaced wrapped" progressive files. Now the situation is slightly improved. However, as I am really picky about the quality of my footage, I noticed that colour resolution of the clips, when imported into Sony Vegas and then exported by using loseless codec, is not retained. The colour (spatial) resolution becomes lower.

However, by importing the following Avisynth script

DirectShowSource("name_of_the_file.MTS")

ConvertToRGB

into VirtualDub and exporting by using the same codec, the colour resolution becomes much better. You can see 400% enlarged crop below (the first with Sony and the second with Avisynth-VirtualDub). Please, click on the first two pictures (left & central) to see enlarged view.

So, I still can't use direct way of editing my footage (direct import into Vegas) if the quality should remain on the highest level. So, the first step is to convert the footage, by using Avisynth-VirtualDub, into some codec (e.g. loseless or Morgan) which preserves entire colour information.

However, such workflow is possible with camera factory firmware/settings, but not if I use, for example, Sanity 5 patch/settings. When exporting Sanity 5 footage with Avisynth-VirtualDub workflow, I always get exported file which is more or less garbage (see the third picture) - the picture becomes worse and worse by time.

I know that majority of GH2 owners are probably satisfied with results on the left picture (note again that it's 400% enlarged detail). Unfortunately, I am not. :-(

Is there any other way to get high-quality footage from other lower-bitrate patch (I liked Sanity 5 due to a relatively low bitrate) by using Avisynth-VirtualDub workflow?

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