I guess this was answered on the frei0r mailing list. But you can see the list
here:
https://www.mltframework.org/plugins/PluginsTransitions/
On Thursday, July 4, 2024 at 11:25:34 AM CDT, Erik Beck
wrote:
Hi all,
What frei0r plugin types are usable in mlt? Just filters (one input,
o
Yeah. That is a good point. You would need to add a transition so that the
transparent is blended with the red. I guess it is not a perfect work around.
~Brian
On Monday, July 24, 2023 at 12:17:45 AM CDT, Rickard Lindberg
wrote:
Hmm.
Do I need to add some kind of transition for the t
> mlt-melt color:red in=0 out=25 -blank 25 color:blue in=0 out=25 -consumer
> avformat target=/tmp/export.mp4
Thanks for the example command. I reproduce this and I confirm it is a bug. I
have filed it here:https://github.com/mltframework/mlt/issues/931
As a workaround, you can use transparent
Here are some initial comments:
Since mlt_tractor_pass_properties only operates on frames, maybe it should be a
member of mlt_frame?
mlt_tractor_pass_properties should probably have a more descriptive name. Which
properties specifically does it pass?
Could we convert the function to a single cal
The normalizing filters are intended to be attached to the individual
producers, not the playlist itself.
It isn't the intention for the programmer to manually add the normalizers. They
are added by the factory when the "service:resource" notation us used (as you
use in your example code).
>Fro
The cairoblend transition has an optimization that if the b frame is opaque,
it will never request the a frame
imagehttps://github.com/mltframework/mlt/blob/master/src/modules/frei0r/transition_frei0r.c#L61
When this optimization is triggered, get_frame is never called on the a frame.
As a resu
Your MLT is over 2 years old. Can you try with a newer version?
Also, it would be helpful to reproduce with a melt command so that others can
easily recreate the problem.
~Brian
On Thursday, July 20, 2023 at 03:00:45 PM CDT, Rickard Lindberg
wrote:
Hi,
I'm having trouble exporting a
If you want to disable SDL1, the packager can add "-DMOD_SDL1=OFF" to their
cmake call.This is how Shotcut does it:
https://github.com/mltframework/shotcut/blob/master/scripts/build-shotcut.sh#L766C161-L766C175
You should be asking the dependency packages if they are using the SDL1 module.
From
> Currently what I am thinking is of using swig for the code conversion that
>would change my java code to c/c++ code that mlt will use.
I hope you mean the other way around - make Java bindings for MLT so that you
Java application can use it.
MLT already has Java bindings using SWIG:
https://g
> 1. identify all YUV only services
> 2. convert some of these to also handle RGB(A)
I am willing to participate in some of these. In particular, if someone
identifies a service that is causing extra conversions, I can work on updating
it to support RGB/RGBA.
> 3. find suitable replacements for
Thanks for investigating this topic. Here are some comments from me:
1) I support an attempt to reduce unnecessary image format conversions. Your
focus is on track compositing. But it would also be good if we could find a
general pattern that would work for filters as well. Some filters can oper
I think you will need to give more information about what you are trying to
accomplish. I do not understand why you would make a filter to double the
dimensions of the image.
In MLT, the consumer expects to receive the image size that it has requested.
The producer has normalize filters (like r
> For sure this is due to my poor understanding of profile's behavior.
It is also due to your low understanding of the MLT framework in general.
Studying the XML is not just to learn the properties of a filter. It also helps
you understand the coordination of MLT framework services. You are work
I would suggest:
1) Create a producer to open V1 (it does not matter the profile)2) Query V1 for
the size3) Close V1 (delete the producer)4) Create a producer to open V2 (it
does not matter the profile)5) Query V2 for the size6) Close V2(delete the
producer)7) Calculate the profile that you wan
For this scenario (and any like it), I strongly recommend to not start with
code. Even for my own coding projects I do not start with code. Start with
Shotcut or Kdenlive and use the tool to visually achieve what you want. After
you get the result that you are looking for in the graphical tool,
The affine filter does not set any of the "transition.*" or "use_normalized"
properties when it is initialized. You need to set them
yourself:https://github.com/mltframework/mlt/blob/master/src/modules/plus/filter_affine.c#L157
In the absence of setting the "transition.*" properties, the encaps
> My first attempt wasn't very successful
What result did you expect, and what was the actual result?
On Thursday, December 30, 2021, 12:28:42 PM CST, José María García Pérez
wrote:
I wasn't aware about Shotcut doing so. Good to know.
My first attempt wasn't very successful. I did the f
var pro:Producer = newFactoryProducer(p, null,
"./resources/pexels-pixabay-97082.jpg")
var pro:Producer = newFactoryProducer(p, null,
"./resources/pexels-pixabay-97082.svg")
The loader will figure out the best producer based on the file type.
The heuristic is
here:https://github.com/mltframe
I think you have been reading the documentation, so I suppose you have already
seen these pages:https://www.mltframework.org/docs/scriptbindings/
https://www.mltframework.org/docs/codeexamples/
I think the melt CLI application is probably your best option for C examples.
I do not have any experi
> ```> Segment violated ('core' generated)> ```
Nothing jumps out at me. I would suggest to run it in GDB and post the stack
trace.
~Brian
On Tuesday, November 9, 2021, 10:31:28 AM CST, José María García Pérez
wrote:
I have the following example:```c#include #include #include
int ma
> Am I correct that MLT translates from these clock times to frame numbers and
>uses frame numbers for everything internally?
Yes. "frame number" is often referred to as "position" in the code. I think the
two terms are used interchangably.
> How does rounding work?
The code is
here:https://g
> How would you proceed?
I would go to the source and follow the
trail:https://sourceforge.net/p/sox/code/ci/master/tree/src/biquads.c#l412
Shotcut has a Bass/Treble filter that uses Ladspa. You could download Shotcut,
use the filter, and inspect the .mlt file to see how it works.
Patches to i
> Hi,
> > I'm trying to create a mosaic from several video files. I'll need to add
>and remove videos over time and change the position and size of videos.> > 1.
>Can I use MLT XML for this?
Yes
> 2. Is it possible to create the mosaic and output to a file as fast as
> possible instead of strea
> the final film needs to be in 10-bit color
HDR is not in your requirement? If you are allowed to use 709 colorspace, then
I do not understand the 10bit requirement. MLT already supports RBG which is 24
bits per pixel. YUV 4:2:2 @ 10bits is only 20 bits per pixel. Maybe you could
use RGB feat
As a reminder, frame threading is when
abs(consumer.get_int("real_time")) > 1. There are some problems with it.
1. sometimes there is a crash
2. image artifacts due to race conditions
I think that the main reason for this is that we try to allow each
service instance to be running get_image(
Yes - as long as:* You do not use any transitions* You do not use any filters
- including normalizing filters - each clip must perfectly match the profile to
avoid normalization filters.
On Monday, November 16, 2020, 11:45:46 PM CST, amin...@mailbox.org
wrote:
On Tue, Nov 17, 2020 a
Yes. I expect that would get you very far. Then, you could probably do a round
trip as long as there are no conversions needed between producer and consumer.
~Brian
On Monday, November 16, 2020, 10:06:21 PM CST, amin...@mailbox.org
wrote:
On Wed, Nov 11, 2020 at 12:18:02AM +, Bria
> > Am I (at all) on the right track here?:
> >
> > Yes!
> >
> > This code seems to say the avformat producer supports rgba, rgb24, and
> > yuv422p?
> > https://github.com/mltframework/mlt/blob/master/src/modules/avformat/producer_avformat.c#L614-L630
> >
> > This is a better place to look:
>
On Monday, November 9, 2020, 03:24:43 AM CST, amin...@mailbox.org
wrote:
On Sat, Nov 07, 2020 at 03:13:49PM +, Brian Matherly wrote:
> > Thanks.
> >
> > Is there an easy way to list (or find) which formats are supported --
> > and thus don't require conversions -- for inputs and
The filter will not process the audio until you call
mlt_frame_get_audio()https://github.com/mltframework/mlt/blob/master/src/framework/mlt_frame.h#L127
Why not listen to the "consumer-frame-render" event from the consumer and
request the level of the frame after all the filters have been proce
> Thanks.
>
> Is there an easy way to list (or find) which formats are supported --
> and thus don't require conversions -- for inputs and outputs of
> filters/transitions?
>
> Tom
I think the only way would be to audit the source code and see what mlt image
format the service requests.
~Brian
>> That is correct, but beware of automatically-added normalization filters
>> that are added in src/modules/core/loader.ini for things such as scaling
>> and padding, etc.
> ffmpeg has options like -auto_conversion_filters [0] and "-pix_fmt +" [1] to
> explicitly disallow accidental conversion
This happens because you have not specified a profile - so MLT makes up a
profile based on your first producer.
https://www.mltframework.org/docs/profiles/
An easy way to learn about profiles is to create a project with a tool like
Kdenlive or Shotcut and then inspect the output.
On Friday
Right now MLT supports a YUV 422 16 bit color format (mlt_image_yuv422p16). So
10bit sources can be mapped to that format to avoid bit depth loss. If you use
any filters or transitions, you will be at the mercy of what that particular
service requires. Some may convert to RGB, some may convert t
It would be helpful if you could provide more detail about what you are trying
to accomplish. What do you mean by "modules" and which ones do you need to use?
~Brian
On Tuesday, July 28, 2020, 08:11:52 AM CDT, amin...@gmail.com
wrote:
Back when it seemed like a no-brainer I remember bre
> On Wednesday, September 11, 2019, 12:35:03 AM CDT, Kingsley G. Morse Jr.
> wrote:
> > > Can you suggest a reasonable amount of RAM for a
> 64 bit computer, so it can edit videos with melt's
> framework and kdenlive?
>
> At the moment, I tend to
> 1.) render to 1920x1080 .webm
> 2.) use sp
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