Copy link to clipboard
Copied
If I maximize the preview window in premiere of the program window to 400 percent and have the transcoded clip above the native .mp4 clip the cineform clip is actually slightly reduced. Like the hand of someone will be more blurry than the native clip. I can notice this by using pressing the eye viewer button to bounce back and forth between the two video tracks. Is this normal? I have transcoded a .mp4 native clip to Cineform quality 4 which is filmscan21and it's slightly blurry if you zoom in at 400 percent compared the native clip. If I transcode to cineform 5 which is the highest quality and maximum setting it does not cause any form of blur.
Is this supposed to happen? If Cineform retains quality why would it be slightly reduced after transcoding?
my .mp4 native clips are in 1080p HD and my cineform settings are 10 bit at quality 4
If it's normal for the clips to be slightly reduced then why would I ever want to transcode?
Copy link to clipboard
Copied
And how does the quality go 100%? That is the question you must answer. There is always some difference when you do a transcoding and you should always make comparisons to the actual size ie 100%. If being 100% looks very different from the original, that is a problem, but if 100% looks very good or equal quality, that is the result you are waiting for and it means that everything is fine.
Copy link to clipboard
Copied
So Don't worry about what is looked like blown up above 100 percent?
Copy link to clipboard
Copied
I would not worry if I transcoded, there are always internal coding changes when I go from one codec to another. 100% is the actual size of the video and everything that goes up from that value will begin to deteriorate even if it is the original video.
Copy link to clipboard
Copied
Are you confident that when you did the transcode you did not alter the pixel dimensions, pixel aspect ratio, field dominance or add frame blending or other modification to the transcode?
I just did a test from some Sony MXF footage to ProRes 422, and can't see any difference at 400% (the Pro Res is on the left, the original on the right:
MtD
Copy link to clipboard
Copied
And here it is transcoded to CineForm (CineForm on the left, original on the right):
MtD
Copy link to clipboard
Copied
it's the same resolution. Double checked.
Here is a video screenshot of me going from the transcoded clip to native and you will see the minor detail differences as I switch back and forth. Particularly by the guys finger with his ring on it. The sharpness comes back when I turn off the top clip which is the cineform clip which is quality setting 4. ScreenCapture_2018-7-24 13.00.48.mp4 - Google Drive
If you look closely you will see that the pixels on the hand etc change when I flip back and forth from cineform to native
Copy link to clipboard
Copied
What are your Sequence Settings? If you are not using CineForm as the sequence preview format, both the H.264 source and the CineForm source are being rendered for display (in quasi real time) in the format your Sequence Settings are set to in the preview area.
Since this preview format conversion is being done on the fly as you flip back and forth, that might explain why you are seeing the difference.
To test, I would set up a split screen of the CineForm and H.264 that splits though the ring, then force render that area of the timeline. Once rendered, then inspect at 400% and see if you can observe differences across the split.
MtD
Copy link to clipboard
Copied
well this is odd. I can't seem to find cineform listed in the sequence settings anywhere. Also when I make a new project and drop the cineform clip into the timeline it asks me to change the settings to match the sequence. When I do it creates a sequence with mpeg i frame rather than cineform.
Copy link to clipboard
Copied
Mac or PC?
MtD
Copy link to clipboard
Copied
PC
Copy link to clipboard
Copied
Finally found the cineform setting in sequence settings and changed it but it's still doing that pixil change even after I rendered the two clips
Copy link to clipboard
Copied
It looks to me you transcoded the clip to upper field (interlaced).
Your source footage is progressive, yes?
Copy link to clipboard
Copied
I don't think so. I just went export. selected cineform and chose quality 4 and left everything the way it was
Copy link to clipboard
Copied
Check the info section.
Copy link to clipboard
Copied
field order is set to lower by default for cineform 10 bit
Copy link to clipboard
Copied
That is not correct. If your source is no fields so should the export be.
Post screenshot sequence settings.
Clip in Mediainfo in treeview
Export settings.
Copy link to clipboard
Copied
well lower field first is what is selected to match the settings according to premiere.
Copy link to clipboard
Copied
Please post the screenshots. HD is never lower field.
Probably started with incorrect settings.
Copy link to clipboard
Copied
how is HD never lower field? That's weird. When I automatically drag my .mts footage it creates a sequence with lower field
Copy link to clipboard
Copied
Please post the screenshots !!!!!!
Copy link to clipboard
Copied
Cineform Tree
native footage tree
Copy link to clipboard
Copied
Native footage is interlaced upper fields as I already mentioned.
CF is progressive made from a UFF clip in a LFF timeline: not a good workflow.
Now yours sequence settings!!!
Copy link to clipboard
Copied
choosing progressive makes it worse than it was with lower field selected. Here are the default settings I used initially when I transcoded the clip.
Copy link to clipboard
Copied
Now screenshot of clip in MediaInfo in treeview.
And sequence settings!