[Cin] Issues related to Motion Plugin

[Phyllis Smith]

Also, the original input media for the shaky demo using Motion 51 and the
XML file to show which parameters can be downloaded at:
https://www.cinelerra-gg.org/media/demos/stabilize/

On Tue, Sep 27, 2022 at 11:06 AM Phyllis Smith <phylsmith2017 at gmail.com>
wrote:

> A little feedback/commentary about Motion in this thread.
>
> - Miroslav's demonstration videos of before and after Motion look pretty
> good and the cell phone quality capture was surprisingly detailed.
> - For those who have not been around so long, Georgy is the expert on the
> Motion plugin as he did a major rewrite that solved many issues a few years
> ago.  So any hints and information he provides is very beneficial.
> - Demo that Georgy referred to is the file (if it does not play for you,
> just download it and play then):
> https://www.cinelerra-gg.org/media/demos/stabilize/stabilize.mp4
>   This demo uses Motion51 since it was created before Georgy greatly
> improved Motion.  Motion51 works a little differently than does the heavily
> modify original Motion.
>
> On Sun, Sep 25, 2022 at 12:04 AM Miroslav Rovis via Cin <
> cin at lists.cinelerra-gg.org> wrote:
>
>> 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.
>>
>> 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
>> --
>> Cin mailing list
>> Cin at lists.cinelerra-gg.org
>> https://lists.cinelerra-gg.org/mailman/listinfo/cin
>>
>
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