[Kdenlive-devel] Feature for kdenlive....

[Evert Vorster]

Hmm, I am using the "next" tree, and that does not have movit. All the
stabilizers in there works as advertised.

However, .mlt files do make kdenlive incredibly unstable.


-Evert-

On 1 July 2014 07:44, Steve Guilford <s.guilford at dbplugins.com> wrote:
> I looked into this and it's not very hard to do.  I took a pass at it
> and got it added to the menu and had the UI created.
>
> Unfortunately, the stabilize process crashes (SIGSEV) as soon as you
> start the job.  So, I made sure I had a current pull from the dev-tree.
> Same result.
>
> The error is the same for all three stabilization filters.
>
> The error is in libGL, triggered by movit:
>
> #0 glGenTextures() at /usr/lib/nvidia-331/libGL.so.1
> #1
> movit::SingleResamplePassEffect::SingleResamplePassEffect(movit::ResampleEffect*)()
> at /storage/kdenlive_9.8/20140630/lib/libmovit.so.2
> #2 movit::ResampleEffect::ResampleEffect()() at
> /storage/kdenlive_9.8/20140630/lib/libmovit.so.2
> #3 OptionalEffect<movit::ResampleEffect>::OptionalEffect() at
> /storage/kdenlive_9.8/src/mlt/src/modules/opengl/optional_effect.h:13
> #4 get_image() at
> /storage/kdenlive_9.8/src/mlt/src/modules/opengl/filter_movit_resample.cpp:82
> #5 mlt_frame_get_image() at
> /storage/kdenlive_9.8/src/mlt/src/framework/mlt_frame.c:581
> #6 get_image() at
> /storage/kdenlive_9.8/src/mlt/src/modules/opengl/filter_movit_resize.cpp:146
> #7 mlt_frame_get_image() at
> /storage/kdenlive_9.8/src/mlt/src/framework/mlt_frame.c:581
> #8 filter_get_image() at
> /storage/kdenlive_9.8/src/mlt/src/modules/videostab/filter_videostab2.c:122
> #9 mlt_frame_get_image() at
> /storage/kdenlive_9.8/src/mlt/src/framework/mlt_frame.c:581
> #10 producer_get_image() at
> /storage/kdenlive_9.8/src/mlt/src/framework/mlt_tractor.c:273
> #11 mlt_frame_get_image() at
> /storage/kdenlive_9.8/src/mlt/src/framework/mlt_frame.c:581
> #12 consumer_read_ahead_thread() at
> /storage/kdenlive_9.8/src/mlt/src/framework/mlt_consumer.c:782
>
> Do any of the stabilization filters work for you?
>
> I have an older source tree (0.9.7) that stabilizes correctly.
>
> That libGL.so.1 library may be from a vendor-distribution driver, not
> the Ubuntu distro version - that could also be an issue.
>
> If you can stabilize w/out problem then I can post up the mods and you
> can test.
>
> Let me know....>>>
>
> On 06/30/2014 03:39 PM, Evert Vorster wrote:
>> Hi there, everybody.
>>
>> I _know_ that there is a lot going on with the code, and that we don't
>> have a load of developers.
>>
>> However, I have to tell you that the newer vid.stab filter in mlt is
>> absolutely amazing!
>>
>> To add it into mlt is not a big hassle.
>> Get the source code for vid.stab library here:
>> https://github.com/georgmartius/vid.stab/tarball/release-0.98b
>>
>> Homepage of the project is:
>> http://public.hronopik.de/vid.stab/features.php?lang=en
>>
>> It will become an optional dependency of mlt in the future as it is
>> already in use for Shotcut, but for now, mlt has to be fetched from
>> git and built on your machine to utilize this new filter.
>>
>> If you are on Arch, I have already made an AUR package for vid.stab,
>> and mlt-git is already pulling it in automatically. Thanks,
>> IncredibleLaser!
>>
>>
>> Once built, 'melt -query filters | grep stab' will return three video
>> stabilization filters:
>> vidstab
>> videostab
>> videostab2
>>
>> vidstab is the new one. It's command line options are exactly the same
>> as videostab2
>>
>>
>> Now, in kdenlive, videostab2 is referred as "transcode"
>>
>> If we could duplicate the module in kdenlive that drives videostab2
>> and call it "vid.stab" and modify it to use the new filter and add it
>> to the clip jobs menu, that would be awesome!
>>
>> In the meantime, I am stabilizing my videos on the command line.
>>
>>
>
> --
> Steve Guilford
> http://www.dbplugins.com
>
>
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-- 
Evert Vorster
Chief Observer
WG Cook