[Mlt-devel] Image sequence question
Hello. Trying to improve image sequence support in Kdenlive, I discovered that MLT cannot currently load a sequence with files like this: image205.jpg image206.jpg image207.jpg (...) If we pass image%.3d.jpg as resource, MLT will look for: image001.jpg, image002.jpg, etc until a max of 100 is reached. The QImage / Pixbuf code shows that a begin property should allow to set a start number for the sequence, for example: melt image%.3d.jpg begin=205 However, it does not work since the filename parsing routine is called from producer_init, so the properties are not yet available to the producer and whatever value we assign to begin will not be used. I have a patch to achieve what I want using that syntax: melt image%.3d.jpg?205 The number after the '?' is the first frame of the sequence. However with that syntax the resource is not correctly identified as an image and by default is sent to the avformat producer. So we need to manually set the producer to qimage or pixbuf, which is not ideal... Do you have any idea how this could be implemented in a better way? Or should I leave it like this and send the patch? Thanks regards jb -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Mlt-devel mailing list Mlt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mlt-devel
Re: [Mlt-devel] Image sequence question
On Tue, Feb 7, 2012 at 10:08 AM, j-b-m j-...@users.sourceforge.net wrote: Hello. Trying to improve image sequence support in Kdenlive, I discovered that MLT cannot currently load a sequence with files like this: image205.jpg image206.jpg image207.jpg (...) If we pass image%.3d.jpg as resource, MLT will look for: image001.jpg, image002.jpg, etc until a max of 100 is reached. The QImage / Pixbuf code shows that a begin property should allow to set a start number for the sequence, for example: melt image%.3d.jpg begin=205 However, it does not work since the filename parsing routine is called from producer_init, so the properties are not yet available to the producer and whatever value we assign to begin will not be used. ah, I think at some time we needed to make sure all producers would return null for invalid inputs, and that caused 'begin' to no longer work I have a patch to achieve what I want using that syntax: melt image%.3d.jpg?205 The number after the '?' is the first frame of the sequence. However with that syntax the resource is not correctly identified as an image and by default is sent to the avformat producer. So we need to manually set the producer to qimage or pixbuf, which is not ideal... Do you have any idea how this could be implemented in a better way? Or should I leave it like this and send the patch? We could simply increase the hard-coded 100 to something much higher like INT_MAX. If you can do that and see how long it takes to fail on an invalid input, that would be great. Of course, it will actually vary depending on the machine, but just to get an idea... -- +-DRD-+ -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Mlt-devel mailing list Mlt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mlt-devel
Re: [Mlt-devel] [PATCH] fix thread exit on error and thread termination
2012/1/16 Maksym Veremeyenko ve...@m1stereo.tv: wrong test code where mlt_consumer_stop was called immediately after mlt_consumer_start caused that sideeffect. to resolve such condition i attached a patch that properly determinate consumer's thread finish and avoid writing /trailer/ if no /header was written.. My testing with sdl and decklink consumers showed that they were not vulnerable to this, but indeed avformat was. I resolved this a little differently, and committed it. -- +-DRD-+ -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Mlt-devel mailing list Mlt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mlt-devel
[Mlt-devel] Git: fix race condition stopping avformat consumer
src/modules/avformat/consumer_avformat.c | 19 ++- 1 files changed, 10 insertions(+), 9 deletions(-) New commits: commit de3106c7ea55b5fb52c8322536c2e94dbbad2cfa Author: Dan Dennedy d...@dennedy.org Date: Tue Feb 7 20:15:31 2012 -0800 fix race condition stopping avformat consumer Reported-by: Maksym Veremeyenko -- Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d ___ Mlt-devel mailing list Mlt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mlt-devel
Re: [Mlt-devel] [PATCH] use sse2 instruction for line compositing
2012/2/6 Maksym Veremeyenko ve...@m1stereo.tv:
04.02.12 22:25, Dan Dennedy написав(ла):
2012/2/3 Maksym Veremeyenkove...@m1stereo.tv:
02.02.12 18:57, Maksym Veremeyenko написав(ла):
Hi,
attached patch perform line compositing for SSE2+ARCH_X86_64 build. It
works for a case where luma is not defined...
updated patch attached
If I am not mistaken, this change reduces precision to 8 pixels. The
existing transition is already limited to a 2 pixel precision, which I
am not happy about. I do not want to further reduce the precision,
give different results depending on CPU, and effectively introduce a
regression, as far as the user is concerned. Maybe we should limit it
to only
apply when width is a multiple of 8. Then, it would still be used for
fullscreen composite on most profiles' resolution.
not exactly...
sse2 code process 8-pixels-groups, tail with 1...7 pixels processed by
native code - that why i did not create a standalone function but putted
code into existing composite_yuv code...
i am still testing it... may be you can take a look if all processed fine.
I started testing with the demos in the demo/ directory. It mostly
works; however, mlt_my_name_is crashes on me (and one time
mlt_squeeze_box):
(gdb) bt
#0 0x7fffdecced14 in composite_line_yuv (
dest=0x25bae60 ~\037~
~\037~!~-\177\064~2\177\065}5\200\064}3\200\062}3\201\064}6\201\063|0\202-|+\202+|+\202,|-\202/{0\203\060{1\203\061{1\203\061{1\203\061|2\202\062|1\202/{/\202\060{1\202-{,\202-{1\202\062{2\202\065{:\202\062{3\203\063{3\203\063z6\203;z@\203=z@\203BzD\203JzR\204WzW\204^ya\202fyj\202myn\202nyn\202wyv\202yy~\202\177y|\202|y\177\202{y{\202|y~\202\177y}\201|y}\201{y{\201{yy\201xyw\201wyx\201w{w\201t{p\201...,
src=0x2c621f0
\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200\020\200...,
width=0, alpha_b=0x2c16e00 ,
alpha_a=0x1ee9a30
\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377\377...,
weight=65535, luma=0x0, soft=0,
step=65535) at composite_line_yuv_sse2_simple.c:6
--
+-DRD-+
--
Keep Your Developer Skills Current with LearnDevNow!
The most comprehensive online learning library for Microsoft developers
is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3,
Metro Style Apps, more. Free future releases when you subscribe now!
http://p.sf.net/sfu/learndevnow-d2d
___
Mlt-devel mailing list
Mlt-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/mlt-devel
