e
> Or maybe there could be a different trick like all the contents of the
> a_frame and b_frame could be swapped when performing this optimization.
> ~Brian
>
>
> On Thursday, July 20, 2023 at 02:42:47 AM CDT, Jean-Baptiste Mardelle
> wrote:
>
> Hi all,
>
Hi all,
I was recently made aware of an issue in interlaced rendering that seems like
a bug but I am not exactly sure where the problem lies.
The problem is that in some cases, MLT renders an interlaced video with bottom
field first, even when asked for a top field first result. I tracked down
Hi all,
Sorry I am a bit late for this but I would it be possible to get a new MLT
release soon ? We have the dependency freeze for Kdenlive early march (9th),
so if this is possible, a new MLT release by the end of next week would be
great for us, allowing users to benefit from the latest
Hi all,
Several users reported problematic playback behavior (freeze on seek) lately
in Kdenlive. Seems like it is related to a recent MLT commit:
fix #860 audio distortion when starting playback
https://github.com/mltframework/mlt/commit/
49398ce87c7ac4123044188b3d3287705df04213
The freeze
On Donnerstag, 17. November 2022 03:04:08 CET Dan Dennedy wrote:
> On Thu, Nov 17, 2022 at 8:49 AM Jean-Baptiste Mardelle
Hi all,
> wrote:
> > On Mittwoch, 16. November 2022 10:27:52 CET Dan Dennedy wrote:
> > > On Wed, Nov 16, 2022 at 4:20 PM Julius Künzel
> >
On Mittwoch, 16. November 2022 10:27:52 CET Dan Dennedy wrote:
> On Wed, Nov 16, 2022 at 4:20 PM Julius Künzel
>
> wrote:
Hi,
> > there is also https://github.com/mltframework/mlt/pull/840 worth to
> > consider for such a bug fix release.
>
> That is untested and unconfirmed. Also, cairoblend
Hi Dan, all.
Seems like unfortunately some regressions were introduced in the latest MLT
7.10.0 release.
* the frei0r.cairoblend transition now crashes when rendering with real_time <
-1. This is easily reproducible with a simple command, using a png image with
alpha :
melt color:red out=100
Hi all,
I just wanted to let you know I just discovered that playing remote files does
not work anymore with MLT and results in a crash, due to this commit:
https://github.com/mltframework/mlt/commit/
d769db2427823f65cba4e097b7fef8a5a8a77469#diff-
Hi all,
While investigating a crash in Kdenlive when using embedded xml
playlists using the producer_consumer, I found the following:
For some reason, the "consumer" producer destroys the audio buffer when
requesting the same frame several times. This leads in Kdenlive to a
crash, because
and let me know if I can help.
Regards,
Jean-Baptiste Mardelle
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it
would be great to have MLT 6.14 out soon. Would that be possible?
Thanks a lot,
Jean-Baptiste Mardelle
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On 03.08.2018 19:46, Dan Dennedy wrote:
On Fri, Aug 3, 2018 at 10:23 AM Jean-Baptiste Mardelle
mailto:j...@kdenlive.org>> wrote:
Hi all,
I recently realized that the color producer always creates an alpha
mask, and uses the rgba24a format by default.
Typ
Hi all,
I recently realized that the color producer always creates an alpha
mask, and uses the rgba24a format by default.
In fact, unless the color has an alpha value under 255, it is
unnecessary and we could simply use an rgb24 format, saving some memory.
I am mostly interested in this
Hi all,
A recent commit ( Prevent computing negative in and out points) causes a
breakage in a common MLT++ command. I left a comment but just to be sure it
reaches you, I post a copy on the mailing list:
https://github.com/mltframework/mlt/commit/9931b78bec8059b1c27ec2bc2e51ba195b4386a8
Hi all,
Hope you are doing fine and great to see the recent activity on MLT. One
recent change causes problems in Kdenlive and will also in other
applications:
https://github.com/mltframework/mlt/commit/c091cae3a34fe9046e7ed610bd64d2df3c11dfe0
With this change, any property containing an
On Monday, March 26, 2018 3:44:09 PM CEST, Brian Matherly wrote:
On 3/26/2018 1:49 AM, Jean-Baptiste Mardelle wrote:
On 23.03.2018 18:42, Dan Dennedy wrote: ...
Hi,
I think you have a few options:
1) Create a new image type in MLT: mlt_image_yuva444p16
I do not recommend this because
Hi,
Following Kdenlive's bug report:
https://bugs.kde.org/show_bug.cgi?id=392294
I noticed that encoding to webm with the avformat consumer produces
files reporting an incorrect fps (1000fps). Some googling suggested to
enforce the fps on the stream, and the following patch produces files
how to do this properly so some guidance would help.
Thanks in advance
jb
On Fri, Mar 23, 2018 at 6:31 AM Brian Matherly <c...@brianmatherly.com
<mailto:c...@brianmatherly.com>> wrote:
On 3/23/2018 2:47 AM, Jean-Baptiste Mardelle wrote:
> Hi all,
>
>
Hi all,
In order to optimize performance, in the qtblend transition (in the qt
module), I try to detect if the top frame in the transition has
transparency, and if it doesn't, instead of performing the transition I
just return the top frame.
However currently, to check if a frame has
On 17.02.2018 05:55, Kingsley G. Morse Jr. wrote:
I'm happy to provide you with an even smaller and
easier test case.
Just
1.) copy the attached tar archive "bug.2.tar"
to the /tmp directory and
2.) do what the attached video shows
$ cd /tmp
$ tar -xvf
to
that. It would be nice if a Kdenlive developer took a look at
this.
Thanks Dan for your continuous support. I hope you are doing well and
everything goes for the best.
I will take some time today to look at this issue, try to replicate and
check if this is a pixbuf producer issue.
Regar
Hi all,
Trying to work a bit with movit, I noticed it does crash when
encountering a tractor embedded in another one. This can easily be
reproduced in Shotcut, or in MLT with following command (it will crash
on frame 50 when the reaching the first frame of the mix tractor:
melt color:red
Hi,
I recently encountered a crash in Kdenlive using the ClipInfo class to
retrieve a playlist clip details.
Fix seems trivial but I prefer to ask before committing. The crash happens
when using the Playlist::clip_info method on a clip that has no resource.
In my case, I was with using a clip
On Sunday, October 9, 2016 9:42:32 AM CEST, Jean-Baptiste Mardelle wrote:
> On Saturday, October 8, 2016 9:41:46 PM CEST, Dan Dennedy wrote:
>> I just installed autotalent on my Ubuntu 16.04 machine, and
>> using the latest MLT from git, it works for me:
>> ddennedy@MS-7593:~
On Saturday, October 8, 2016 9:41:46 PM CEST, Dan Dennedy wrote:
> I just installed autotalent on my Ubuntu 16.04 machine, and
> using the latest MLT from git, it works for me:
> ddennedy@MS-7593:~$ melt -query filters | grep 4262
> - ladspa.4262
Thanks for the feedback. I recompiled
On Tuesday, September 13, 2016 7:16:58 PM CEST, Dan Dennedy wrote:
> Yes, that is fine. I suppose there is no way to detect the
> OpenCV contrib module in configure? It would suck to get a bunch
> of compilation error reports if OpenCV is detected fine but the
> contrib module is not. If that
On Tuesday, July 26, 2016 9:41:26 PM CEST, Harald Albrecht wrote:
> I can't get my head around really understanding why MLT, taken
> the following example, uses video frames from track #1 (middle
> track) instead of from track #0 with track #2 composed onto it.
> Besides the overall
On Tuesday, July 26, 2016 11:29:36 AM CEST, Christophe Thommeret wrote:
> g++ -I/usr/include/x86_64-linux-gnu/qt5/QtOpenGL
> -I/usr/include/x86_64-linux-gnu/qt5
> -I/usr/include/x86_64-linux-gnu/qt5/QtWidgets
> -I/usr/include/x86_64-linux-gnu/qt5
> -I/usr/include/x86_64-linux-gnu/qt5/QtGui
> Here it fails:
>
> g++ -shared -Wl,-soname,libmlt++.so.3 -o libmlt++.so.6.3.0
> MltAnimation.o MltConsumer.o MltDeque.o MltEvent.o MltFactory.o
> MltField.o MltFilter.o MltFilteredConsumer.o MltFilteredProducer.o
> MltFrame.o MltGeometry.o MltMultitrack.o MltParser.o MltPlaylist.o
>
On Wednesday, July 20, 2016 3:20:13 PM CEST, Brian Matherly wrote:
>
> I have an observation about this line:
> https://github.com/mltframework/mlt/blob/master/src/modules/qt/transition_qtblend.cpp#L58
>
> In QT, the image origin is in the upper left:
> http://doc.qt.io/qt-5/coordsys.html
> In
Hi,
I just noticed that the configure script in qt module first checks for Qt4,
and if not found checks for Qt5 (if the user did not manually supply a
$qt_libdir).
Today, it seems to me that it would make more sense to invert the logic and
first check for Qt5, because I think most people who
On Tuesday, July 19, 2016 9:09:58 AM CEST, Dan Dennedy wrote:
> On Fri, Jul 15, 2016 at 12:35 AM Jean-Baptiste Mardelle
> <j...@kdenlive.org> wrote:
> * frei0r.cairoblend: if we want to optimize it as I did for qtblend
>
> I know you moved onto qtblend, but I tried an opti
On Saturday, July 16, 2016 8:57:49 PM CEST, Brian Matherly wrote:
>
>> Oh, right. I used it in my qtblend transition - than I guess I
>> will enable
>> it only on Qt5.
>
> I would prefer to see copy_qimage_to_mlt_rgba() modified to use
> it with a conditional to check QT version at compile
l appear differently depending on the endianess of the
> system. So I think this will work for us on big or little endian
> systems since. If we find that it does not work on big-endian
> systems, we can just put a check in place and either convert the
> easy way or the hard (current)
Hi,
Following my tests with the qtblend transitions, I realized that the QImage
format Format_RGBA allows for a much simpler conversion between MLT and
QImage, avoiding the need to copy data. We can in fact simply create a
QImage directly from MLT's image buffer (with
Nachricht
> Von: Jean-Baptiste Mardelle <j...@kdenlive.org>
> Datum: 15.07.2016 09:35 (GMT+01:00)
> An: mlt-devel@lists.sourceforge.net
> Betreff: Re: [Mlt-devel] Compositing transition question
>
> On Friday, July 15, 2016 4:27:04 AM CEST, Brian Matherly wrote
On Friday, July 15, 2016 4:27:04 AM CEST, Brian Matherly wrote:
> JB,
>
> I think this optimization could be made in frei0r.cairoblend.
>
> Could you compare the performance of frei0r.cairoblend with
> transition_qtblend when the top frame has transparency?
>
> Seems like the transition_qtblend
Hi all,
I have a question regarding multitrack compositing in video editors using
MLT. In Shotcut, you add a freir.cairoblend transition to ensure
transparency between tracks.
I copied this approach for Kdenlive, but this leads to a huge performance
loss (maybe because the freir.cairoblend
On Wednesday, April 20, 2016 7:05:20 AM CEST, Dan Dennedy wrote:
> I would like to release 6.2.0 tomorrow night. Let me know if I
> should wait. Meanwhile, you can review release notes:
> https://github.com/mltframework/mlt/blob/master/NEWS
Hi Dan,
I just pushed a small fix for Kdenlive's
On Monday, April 18, 2016 1:05:32 AM CEST, Dan Dennedy wrote:
>
>
> On Sun, Apr 17, 2016 at 3:53 PM Jean-Baptiste Mardelle
> <j...@kdenlive.org> wrote:
> On Sunday, April 17, 2016 2:26:02 AM CEST, Dan Dennedy wrote:
>
>
>> Do you know about the facedetect
On Sunday, April 17, 2016 2:26:02 AM CEST, Dan Dennedy wrote:
> Do you know about the facedetect and facebl0r filters in
> frei0r? motion_est supplies data to other filters. Why doesn't
> this one do that? I do not really care, and I have not looked at
> it yet - not very motivated lately -
https://lists.sourceforge.net/lists/admindb/mlt-devel
>
> to approve or deny the request.
>
>
>
> -- Forwarded message --
> From: Jean-Baptiste Mardelle <j...@kdenlive.org>
> To: <mlt-devel@lists.sourceforge.net>
> Cc:
> Date: Sat, 16 Apr
the bottom channel
> The tracked object would then be obscured by a blurred version of itself.
Hey, OpenCV is fun!
One more line of code and the tracker filter can blur the object!
Will add it as an option.
regards
jb
> From: Jean-Baptiste Mardelle <j...@kdenlive.org>
> To: m
and if it works correctly
will ask if it's ok to merge to MLT's master.
Performance is quite good, it can do real-time tracking of 3 objects in a
1280x720 video on my 3 years old intel core i7.
Regards,
jb
> From: Jean-Baptiste Mardelle <j...@kdenlive.org>
> To: mlt-devel@lists.
Hi all,
I spend my day working on an OpenCV based filter to do motion tracking in
MLT, since the current "motion_est" and "autotrack" filters are really bad
at this. My OpenCV version seems to work quite well, but I have only done
some minimal testing.
Code is currently available in my git
On Tuesday, February 9, 2016 5:44:28 AM CET, Dan Dennedy wrote:
> See here:
> http://www.mltframework.org/bin/view/MLT/OpenGL
>
> You have to use "-consumer xgl" or "-consumer qglsl 0=sdl" to
> run that command. The "sdl" consumer is default, but it is not
> directly compatible with the opengl
Hi Dan, all.
Since we started working on animation properties in Kdenlive, it would be
nice to see more effects / transitions using it.
I have done some quick tests to make frei0r use the animation properties
instead of the old mlt_geometry, and a simple patch is available here:
On Thursday, January 28, 2016 5:46:11 AM CEST, Dan Dennedy wrote:
> For the next release of MLT (soon) I was thinking of changing
> the version scheme to reflect the so version number. IOW, it
> would be like 6.0.0 (or possibly 7.0.0), and the major version
> will change when the ABI changes.
>
On mercredi, 18 novembre 2015 20.25:40 h CET, Maksym Veremeyenko wrote:
> On 06.11.2015 20:51, jb wrote:
>> Composite transitions with luma files are currently broken, resulting in
>> corrupted images and leading to crashes when using an alpha
>> operator on the ...
> do you still has
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