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OpenMP
by Andrew Randrianasulu 12 Mar '20

12 Mar '20

Hi, all! Currently I'm experimenting with OpenMP https://bisqwit.iki.fi/story/howto/openmp/ --quote--- Support in different compilers GCC (GNU Compiler Collection) supports OpenMP 4.5 since version 6.1, OpenMP 4.0 since version 4.9, OpenMP 3.1 since version 4.7, OpenMP 3.0 since version 4.4, and OpenMP 2.5 since version 4.2. Add the commandline option -fopenmp to enable it. OpenMP offloading is supported for Intel MIC targets only (Intel Xeon Phi KNL + emulation) since version 5.1, and to NVidia (NVPTX) targets since version 7 or so. [...] The syntax All OpenMP constructs in C and C++ are indicated with a #pragma omp followed by parameters, ending in a newline. The pragma usually applies only into the statement immediately following it, except for the barrier and flush commands, which do not have associated statements. The parallel construct The parallel construct starts a parallel block. It creates a team of N threads (where N is determined at runtime, usually from the number of CPU cores, but may be affected by a few things), all of which execute the next statement (or the next block, if the statement is a {…} -enclosure). After the statement, the threads join back into one. #pragma omp parallel { // Code inside this region runs in parallel. printf("Hello!\n"); } This code creates a team of threads, and each thread executes the same code. It prints the text "Hello!" followed by a newline, as many times as there are threads in the team created. For a dual-core system, it will output the text twice. (Note: It may also output something like "HeHlellolo", depending on system, because the printing happens in parallel.) At the }, the threads are joined back into one, as if in non-threaded program. Internally, GCC implements this by creating a magic function and moving the associated code into that function, so that all the variables declared within that block become local variables of that function (and thus, locals to each thread). ICC, on the other hand, uses a mechanism resembling fork(), and does not create a magic function. Both implementations are, of course, valid, and semantically identical. Variables shared from the context are handled transparently, sometimes by passing a reference and sometimes by using register variables which are flushed at the end of the parallel block (or whenever a flush is executed). --quote end--- http://gregslabaugh.net/publications/OpenMP_SPM.pdf Multicore Image Processing with OpenMP Greg Slabaugh, Richard Boyes, Xiaoyun Yang https://nccastaff.bournemouth.ac.uk/jmacey/OpenMP/ -quote- OpenMP by Rob Bateman Introduction OpenMP is an open standard that lets you easily make use of multi-threaded processors. It's currently supported by the following compilers: Visual C++, gcc (though not the Win32 version that comes with cygwin), XCode, and the Intel compiler; and It's supported on the following platforms: Win32, Linux, MacOS, XBox360*, and PS3*. * Not amazingly well on those platforms --quote end-- I used bcast2000 example , namely bcast/overlayframe.C and those CFLAGS: CFLAGS = -O3 -fpermissive -fomit-frame-pointer -march=pentium3 -ffast-math -mfpmath=both -fopenmp -I/usr/local/include + enabled linking with libgomp (gcc 5.5.0) by adding -lgomp to bcast-2000c/bcast/Makefile it makes code slower, so far :} but it eats all processors :} unlike original code

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cinelerra_scale.C
by Andrew Randrianasulu 12 Mar '20

12 Mar '20

I have stupid question again... in file https://git.cinelerra-gg.org/git/?p=goodguy/cinelerra.git;a=blob;f=cinelerr… I can see such lines: 60 61 void ScaleThread::run() 62 { 63 if(already_running) return; 64 already_running = 1; 65 constrain_ratio = mwindow->defaults->get("SCALECONSTRAIN", 0); 66 scale_data = mwindow->defaults->get("SCALEDATA", 0); 67 auto_aspect = mwindow->defaults->get("AUDIOASPECT", 0); 68 offsets[0] = offsets[1] = offsets[2] = offsets[3] = 0; 69 70 orig_dimension[0] = dimension[0] = mwindow->session->track_w; 71 orig_dimension[1] = dimension[1] = mwindow->session->track_h; 72 orig_dimension[2] = dimension[2] = mwindow->session->output_w; 73 orig_dimension[3] = dimension[3] = mwindow->session->output_h; 74 ratio[0] = ratio[1] = ratio[2] = ratio[3] = 1; 75 aspect_w = mwindow->session->aspect_w; 76 aspect_h = mwindow->session->aspect_h; 77 78 window = new ScaleWindow(this); 79 window->create_objects(); 80 int result = window->run_window(); 81 if(!result) 82 { 83 int dummy_offsets[4]; 84 dummy_offsets[0] = dummy_offsets[1] = dummy_offsets[2] = dummy_offsets[3] = 0; 85 // Fake the offsets if data is scaled. 86 87 // fix tracks 88 //mwindow->stop_playback(1); 89 // save the before undo 90 mwindow->undo->update_undo_edits(_("Resize"), 0); 91 mwindow->tracks->scale_video(dimension, scale_data ? dummy_offsets : offsets, scale_data); 92 mwindow->session->track_w = dimension[0]; 93 mwindow->session->track_h = dimension[1]; 94 mwindow->session->output_w = dimension[2]; 95 mwindow->session->output_h = dimension[3]; 96 mwindow->session->aspect_w = aspect_w; 97 mwindow->session->aspect_h = aspect_h; 98 mwindow->video_window->resize_window(); 99 mwindow->draw(); 100 mwindow->undo->update_undo_edits(); 101 mwindow->session->changes_made = 1; 102 mwindow->defaults->update("ASPECTW", aspect_w); 103 mwindow->defaults->update("ASPECTH", aspect_h); 104 mwindow->defaults->update("AUTOASPECT", auto_aspect); 105 } 106 delete window; 107 108 mwindow->defaults->update("SCALECONSTRAIN", constrain_ratio); 109 mwindow->defaults->update("SCALEDATA", scale_data); 110 already_running = 0; 111 } shouldn't line 67 reads as AUTOASPECT instead of AUDIOASPECT ? Found this while trying to debug bc2000 crash issue ...

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website down Error 521 Ray ID: 572de7331a9ec447 • 2020-03-12 13:36:16 UTC Web server is down
by W P 12 Mar '20

12 Mar '20

Just wanted to point out that https://www.cinelerra-gg.org/ server's is down, don't know if Sam is doing maintenance so I just sent this message.

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Creating subtitles .srt
by Andrea paz 11 Mar '20

11 Mar '20

@IgorBeg and all. I was watching your subtitle video. How do you create the .srt file? Manually with a plain text editor? Are there programs for this?

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Unable to install latest cin package in debian testing
by jEsuSdA 8) 10 Mar '20

10 Mar '20

Hi! I was able to install cin package in my debian testing since long time ago, but the latest cin package causes dependency error. latest package depends on libva1 libva-x11-1 libva-drm1 But in debian stable and testing repositories there are the packages libva2 libva-x11-2 libva-drm2 Could you provide a package with these dependencies to allow the debian users to use latest Cinelerra versions ? Thanks a lot.

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Offtopic, but I put up github with modified Broadcast2000
by Andrew Randrianasulu 10 Mar '20

10 Mar '20

Hugely off, but .. I like to have my own toy video editor :} https://github.com/Randrianasulu/broadcast2000/commits/master Video from yesterday: https://www.youtube.com/watch?v=j1xvaWXEXzA So far it works on IA32 :} (actually, kernel is 64-bit, but all userspace still 32-bit, this may contribute to some crash-on-pause behaviour, if playing audio via aoss) I think I'll try to make yuvpipe output, and may be try to fix alsa audio ... Actually, it seems 'floating point alpha' in this version of Broadcast kills perf most :} 2 fps on 1280x720 video if I use fader .... at 1.4Ghz x 4 But still nearly 12 fps for two-track video (1280x720, mjpeg - 75% and 50% faders) if I just use alpha channel and set CPU to max - 3.9 x 4 ghz :} Thing is, apparently 'bilinear interpolation' uses exactly FP alpha, so it will be SLOW on HDTV sized videos - time to dig into source to see if scaled interpolation can be used with just integer alpha channels Have nice days {nights}, and good health!

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Re: [Cin] Shortcuts
by daniel-cinelerra-gg＠opayq.com 09 Mar '20

09 Mar '20

How hard would it be to create a menu for user-editable shortcuts? Ardour/mixbus has something like this, and I find it really, really convenient. Would it be possible to adapt their code, or would it require huge rewrites? http://www.harrisonconsoles.com/mixbus/mixbus32c-6-live-manual/1/en/topic/k… Dan On Sat, Mar 7, 2020 at 12:18 PM Igor BEGHETTO < > wrote: > > > > Hi! > > > *IMPORTANT: the shortcut for “Delete last track” has been changed* > > from the lower case letter “d” > > to Ctrl-Shift-D. Having just “d” was somewhat dangerous per Dan > > (Quinton?) because off screen. > > A “format” option button for ffmpeg in the Render menu shows up when > > you click on the Video > > wrench icon. This provides a few more tuning operators for the render > > for choices like mp4. > I think that the shorcuts are useful for the most/frequently used > operation/action. Cinelerra have some shortcuts where, I think, you can > do without them: for example in File Menu there are "BD Render..." > (Ctrl+D) and "DVD Render" (Alt+D). > I think it would be better to assign Ctrl+D shortcut for "Delete last > track" instead of Ctrl+Shif+D. > So, more intuitive, you have Shift+D to "Delete First track", and Ctrl+D > to "Delete Last track": Shift is the key up (then first), and Ctrl is > the key down (then last) in the keyboard. > > > About "shortcut for going trough *Autos* keyframes" thread. > > We are going to "attempt" to add code to use a shortcut of Alt-a for > > next fader/speed/autos and Ctrl-a for previous auto. This should come > > in handy. > I think, if possible, to use the same shortcuts of the Plugin's > keyframes because they are always keyframes, for me. > > Thanks > > IgorBeg > > > > > -- > Cin mailing list > Cin(a)lists.cinelerra-gg.org > https://lists.cinelerra-gg.org/mailman/listinfo/cin >

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shortcut for going trough keyframes
by deim31 08 Mar '20

08 Mar '20

Hi, I sometimes want to walk through keyframes - in last situation I used video and audio faders so I managed to search shortcut in manual and I found there key [f] for that (go to next keyframe). But it seems it doesn't work the way I thought. It moves cursor to end (or begin) of track. I also noticed when I set fader keyframe I can't return to the same position again. I don't know if it's some feature or error. Thanks and have a nice day :-) deim

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Shortcuts
by Igor BEGHETTO 07 Mar '20

07 Mar '20

Hi! > *IMPORTANT: the shortcut for “Delete last track” has been changed* > from the lower case letter “d” > to Ctrl-Shift-D. Having just “d” was somewhat dangerous per Dan > (Quinton?) because off screen. > A “format” option button for ffmpeg in the Render menu shows up when > you click on the Video > wrench icon. This provides a few more tuning operators for the render > for choices like mp4. I think that the shorcuts are useful for the most/frequently used operation/action. Cinelerra have some shortcuts where, I think, you can do without them: for example in File Menu there are "BD Render..." (Ctrl+D) and "DVD Render" (Alt+D). I think it would be better to assign Ctrl+D shortcut for "Delete last track" instead of Ctrl+Shif+D. So, more intuitive, you have Shift+D to "Delete First track", and Ctrl+D to "Delete Last track": Shift is the key up (then first), and Ctrl is the key down (then last) in the keyboard. About "shortcut for going trough *Autos* keyframes" thread. > We are going to "attempt" to add code to use a shortcut of Alt-a for > next fader/speed/autos and Ctrl-a for previous auto. This should come > in handy. I think, if possible, to use the same shortcuts of the Plugin's keyframes because they are always keyframes, for me. Thanks IgorBeg

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Offtop: Broadcast 2000 actually draws images, too!
by Andrew Randrianasulu 07 Mar '20

07 Mar '20

Victory! It was simple matter of enabling displaying track's content AND hitting 'fit' button :} Audio sort of works too, if I edit /usr/local/bcast/bcast2000.sh for inclusion of aoss wrapper (but it crashes if I try to pause playback) Cool, what else I can say :} And yes, there WAS vertical timeline :} (By the way, resizing main window with all those thumbnails on modern X server IS slow.... you can see it redrawing itself multiple times for few seconds)

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