[Cin] Issues related to Motion Plugin

[Miroslav Rovis]

On 220925-09:02+0300, Andrew Randrianasulu wrote:
> вс, 25 сент. 2022 г., 08:56 Miroslav Rovis <miro.rovis at croatiafidelis.hr>:
> 
> > Reusing what I wrote in late last night's thread.
> > On 220924-23:31+0200, Miroslav Rovis wrote:
> > > I've been using VP9 (previously VP8) webm a lot. E.g. anywhere
> > > you go from:
> > > https://www.croatiafidelis.hr/2022/
> > > or, to take just one sample (4 minutes):
> > >
> > https://www.croatiafidelis.hr/2022/Jazovka/VID-2022-06-22-1034-Jazovka-procesija.webm
> > > It's nothing but motion plugin set up, blur plugin in the
> > > bottom video at 100%, and go render. Then work the audio
> > > separately, mux and post. Of course, the stabilizing is slow,
> > > motion plugin takes long to calculate.
> > >
> > > But all those people moving can be scrutinized in a lot of
> > > detail, as if I filmed with a mobile phone attached to a good
> > > stabilizer, and instead, the original was a shaky video as
> > > ever, because I held the mobile with just my hand.
> > >
> > > Cinelerra can stabilize you videos well. It's worth the
> > > time-expensive learning curve to get to know how to do it.
> > >
> > > Here are some comparison videos with both the shaky and
> > > stabilized video (however I've gotten better since then, these
> > > are all old, but I have no other comparisons)
> > >
> > > e.g. from:
> > > https://www.croatiafidelis.hr/2019/
> > > the videos e.g.:
> > >
> > https://www.croatiafidelis.hr/2019/Jaska/190824-Jaska-Vukovic-demo-1-stabilize.webm
> > > or from:
> > > https://www.croatiafidelis.hr/2015/Macelj/Macelj-2-cmp.php
> > > the video being:
> > > https://www.croatiafidelis.hr/2015/Macelj/150607-Macelj-HebrangCOMP.webm
> >
> > But the above do not sufficienlty well demonstrate how well
> > Cinelerra can stabilize shaky videos.
> >
> > I think I have a better example that I hope I can offer.
> >
> > But I plan to make it both a demonstration of this capability
> > and a tutorial so other users can benefit from it, on the one
> > hand.
> >
> > And on the other, I want to show the issues that come across in
> > Motion Plugin usage.
> >
> > I can say what it is right now, but that's dry and no way
> > immediately plausible. Here:
> >
> > The fist issue:
> > When using Motion Plugin, a last-used setting (previusly used,
> > even in a different video) is written in the new XML along with
> > the newly setup numbers for a particular part of a video to
> > which Motion Plugin Effect is attached. And it sometimes messes
> > up the XML, and rendering does not get what the user put in.
> >
> > The second issue:
> > And, sometimes, there appear to be problems with some Cinelerra
> > cache somewhere so bad that tweaking the Motion Plugin settings,
> > while written correctly in the new XML, do not actually apply.
> > The rendering gets the user the earlier tweaked result no matter
> > the new editing.
> >
> 
> try to look in /tmp folder? may be some old result stuck there ... (purely
> from memory)

I will.

> 
> 
> 
> 
> > While I am not certain I can, within the time that I can set
> > appart for this, show how to reproduce the second issue, I
> > believe I can show the first issue within, hopefully this day
> > today.
> >
> > I want to do it along with demonstrating a very good motion
> > stabilization on not-too difficult parts of a 1m 30s video that
> > otherwise would be almost bad for viewing.
> >
> > I plan to post it, God permittign, at:
> >
> > https://croatiafidelis.hr/foss/cap/cap-220925-cinelerra/
> > where, at the time of writing this, there is only the short
> > video:
> > VID_20220910_133415_5.mp4 [*]
> > that I want to use for this
> > demonstration/tutorial/bug-report all-in-one.
> >
> > Regards!
> >
> > ----
> > [*] The timestamp in VID_20220910_133415_5.mp4 is for 2022-09-10
> > 13:34:15, the start of my filming, but that's part 5, which I
> > obtained with cutting the VID_20220910_133415.mp4 with mkvmerge.
> > It's and event that the media exanded for a few days on, an,
> > thankfully innocuous standoff with Croatian police... I want to
> > show how good reporting can be done with simple cheap mobile
> > phone camera, made good only after motion stabilization.
> > I mean, look at that video, it's so shaky because I walked and
> > even talked and waved (well, that's not seen) at people...
> > Stabilization is absolutely necessary.
> > This is what you should get (SHA256 of the video):
> > 8ae65c8b17b3d607020c392323fa5ab8569bd40083648d808602a0dfffc8f1f9
> > VID_20220910_133415_5.mp4
> >
> > --
> > Miroslav Rovis
> > Zagreb, Croatia
> > https://www.CroatiaFidelis.hr
> > my PGP-key:
> > https://www.croatiafidelis.hr/FCF13245ED247DCE443855B7EA9884884FBAF0AE.asc
> >

-- 
Miroslav Rovis
Zagreb, Croatia
https://www.CroatiaFidelis.hr
my PGP-key:
https://www.croatiafidelis.hr/FCF13245ED247DCE443855B7EA9884884FBAF0AE.asc
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