- Cin - Cinelerra-GG Mailing Lists

psychtoolbox vs HDR
by Andrew Randrianasulu 08 Jun '23

08 Jun '23

Found this tidbit http://psychtoolbox.org/news.html in 3.0.18 beta 16 bit native (effective 12 bit) framebuffer support for Linux with AMD Polaris and later. ==== This commit switches PsychImaging() to only expose 16 bpc framebuffers on such Linux + X11 + AMD Polaris+ + amdvlk + Linux 5.14 systems, but then at much better reliability and performance than our old dead code. It allows to get up to 12 bpc per color-channel color output, ie. 4096 intensity levels for red, green, blue, grayscale/luminance and a total of 64 billion shades of color, either on suitable 12 bpc capable high-end displays, or via spatial dithering by the gpu on the more common 10 bpc capable displays or even - at a lower quality - standard 8 bpc capable displays. This makes Linux the first operating system to my knowledge to support this color precision on out of the box on commodity graphics hardware and displays, natively at full performance without any compromise in timing precision or reliability. Basic testing has been performed with a CRS ColorCal-2 on a HDR-10 10 bpc capable monitor and on a MacBookPro 2017 Retina display under Linux, with AMD RavenRidge and Polaris. ==== test apps apparently even include gstreamer-based movie player (never thought I'll find HDR player in medical software ...) http://psychtoolbox.org/docs/PsychHDR http://psychtoolbox.org/docs/PlayMoviesDemo === If the optional flag ‘hdr’ is specified as non-zero, then the demo expects the onscreen window to display on a HDR-10 capable display device and system, and tries to switch to HDR mode. If the operating system+gpu driver+gpu+display combo does not support HDR, the demo will abort with an error. Otherwise it will expect the movies to be HDR-10 encoded and try to display them appropriately. A flag of 1 does just that. A flag of 2 will manually force the assumed EOTF of movies to be of type PQ, iow. assume the movie is a HDR-10 movie in typical Perceptual Quantizer encoding. This is useful if you want to play back HDR content on a system with a [GStreamer <http://psychtoolbox.org/docs/GStreamer>](GStreamer) <http://psychtoolbox.org/docs/%28GStreamer%29> version older than 1.18.0 installed, where [GStreamer <http://psychtoolbox.org/docs/GStreamer>] (GStreamer) <http://psychtoolbox.org/docs/%28GStreamer%29> is not fully HDR capable, but this hack may get you limping along. Another restriction would be lack of returned HDR metadata, so if your HDR display expects that, you will not get the best possible quality. Upgrading to [GStreamer <http://psychtoolbox.org/docs/GStreamer>](GStreamer) <http://psychtoolbox.org/docs/%28GStreamer%29> 1.18 or later is advised for HDR playback. A flag of 3 or 4 will use an alternative HDR display method only available on Linux/X11, with 4 applying the same hack to cope with older [GStreamer <http://psychtoolbox.org/docs/GStreamer>](GStreamer) <http://psychtoolbox.org/docs/%28GStreamer%29> versions as a setting of 2. ==== happy psyching! (???)

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aarch64 x265 part of build broken on Arch Arm?
by Andrew Randrianasulu 08 Jun '23

08 Jun '23

User reported build failure: https://gist.githubusercontent.com/ivabus/9945c01f08c991f27f984efa8d3a43cd/… I thought it was fallout from my aarch64-clang patching. I dived in x265 git and supposedly there was fix, partially applicable to our patched x265. Can anyone test on aarch64 gcc - I tested with termux/clang and it patches and builds .... full git clone was done this way git clone https://bitbucket.org/multicoreware/x265_git/ then I looked for specific commit git checkout -b aarch64 0b75c44c10e605fe9e9ebed58f04a46271131827 and extracted single commit git format-patch 931178347b3f73e40798fd5180209654536bbaa5 and then removed last part because this file was already changed between that we have and git at that point. Commit was found by looking at this bugreport https://github.com/markus-perl/ffmpeg-build-script/pull/180/files may be we can test recent x265 git, too ...

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How to lengthen or shorten a clip
by Andrea paz 08 Jun '23

08 Jun '23

Another great video tutorial from IgorBeg: https://youtu.be/JPhO2sscZzU

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GDB cheat sheet
by Andrew Randrianasulu 06 Jun '23

06 Jun '23

https://handmade.network/forums/articles/t/2883-gdb I only now learned about "display" command ....

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DeVeDe or DeVeDeNG?
by Andrew Randrianasulu 06 Jun '23

06 Jun '23

Terje, what exactly you use? https://www.rastersoft.com/programas/devede.html this one is new version - python3 / gtk3 Another projects there also might be interesting :)

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Vimix - live gl video mixer
by Andrew Randrianasulu 05 Jun '23

05 Jun '23

https://github.com/brunoherbelin/vimix/releases Found via https://zenway.ru/page/glmixer notably absent: audio support :)

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Awesome functions for Arch
by Andrew Randrianasulu 05 Jun '23

05 Jun '23

https://aur.archlinux.org/packages/vapoursynth-plugin-awsmfunc-git literally ... For that? For x265 HDR param calculations, of course! :)

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AdobeRGB and editing
by Stefan de Konink 04 Jun '23

04 Jun '23

Hi, Given that AdobeRGB gives a wider colorrange, and therefore is likely to have the ability to do 'better' conversions. What is the best workflow to edit in Cinelerra in this extended mode? Or is Cinelerra by definition limited to RGB-8bit/RGBA-8bit/YUV-8bit/YUVA-8bit? -- Stefan

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DV to DVD rendering - questions and issues
by Terje J. Hanssen 03 Jun '23

03 Jun '23

Lately I have experimented with PAL DV to DVD rendering, both using ffmpeg/DeVeDE, and now using CinGG mpeg2enc/FFMPEG I hope someone can help to clarify the following questions and debug possible issues regarding DVD Rendering with CinGG: 1. dvd.m2v and dvd.mpg Why are there two video files created, dvd.m2v w/o Audio and dvd.mpg w/Audio, and which one is used for what? tree -sh dvd_20230528-115747 dvd_20230528-115747 ├── [ 16M] dvd.ac3 ├── [3.4K] dvd.jobs ├── [562M] dvd.m2v ├── [588M] dvd.mpg ├── [ 733] dvd.sh ├── [6.5K] dvd.xml └── [4.0K] iso ├── [4.0K] AUDIO_TS └── [4.0K] VIDEO_TS ├── [6.0K] VIDEO_TS.BUP ├── [6.0K] VIDEO_TS.IFO ├── [ 18K] VTS_01_0.BUP ├── [ 18K] VTS_01_0.IFO └── [588M] VTS_01_1.VOB 2. Deinterlacing: The input PAL DV source file is Interlaced, Bottom Field First ffprobe: Stream #0:0: Video: dvvideo, none, 25000 kb/s, SAR 16:15 DAR 0:0, 25 fps, 25 tbr, 25 tbn Stream #0:1: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s Unsupported codec with id 24 for input stream 0 mediainfo: Width : 720 pixels Height : 576 pixels Color space : YUV Scan type : Interlaced Scan order : Bottom Field First Why does deinterlacing with dvd default rendering (mpeg2enc) still come out as Interlaced, but Top Field first? ffprobe -hide_banner dvd.m2v Input #0, mpegvideo, from 'dvd.m2v': Duration: N/A, bitrate: N/A Stream #0:0: Video: mpeg2video (Main), yuv420p(tv, bt470bg, top first), 720x576 [SAR 64:45 DAR 16:9], 25 fps, 25 tbr, 1200k tbn Side data: cpb: bitrate max/min/avg: 8000000/0/0 buffer size: 1835008 vbv_delay: N/A ffprobe -hide_banner dvd.mpg [mpeg @ 0x55a756c7af00] start time for stream 0 is not set in estimate_timings_from_pts Input #0, mpeg, from 'dvd.mpg': Duration: 00:09:56.44, start: 0.160000, bitrate: 8305 kb/s Stream #0:0[0x1bf]: Data: dvd_nav_packet Stream #0:1[0x1e0]: Video: mpeg2video (Main), yuv420p(tv, bt470bg, top first), 720x576 [SAR 64:45 DAR 16:9], 25 fps, 25 tbr, 90k tbn Side data: cpb: bitrate max/min/avg: 8000000/0/0 buffer size: 1835008 vbv_delay: N/A Stream #0:2[0x80]: Audio: ac3, 48000 Hz, stereo, fltp, 224 kb/s Unsupported codec with id 98312 for input stream 0 mediainfo dvd.m2v | egrep "Color|pixels|Scan" Width : 720 pixels Height : 576 pixels Color space : YUV Scan type : Interlaced Scan order : Top Field First Color primaries : BT.601 PAL mediainfo dvd.mpg | egrep "Color|pixels|Scan" Width : 720 pixels Height : 576 pixels Color space : YUV Scan type : Interlaced Scan order : Top Field First Color primaries : BT.601 PAL While corresponding deinterlacing with the optional FFMPEG DVD Rendering comes out as Progressive? ffprobe -hide_banner dvd.m2v Input #0, mpegvideo, from 'dvd.m2v': Duration: N/A, bitrate: N/A Stream #0:0: Video: mpeg2video (Main), yuv420p(tv, bt470bg/unknown/unknown, progressive), 720x576 [SAR 64:45 DAR 16:9], 25 fps, 25 tbr, 1200k tbn Side data: cpb: bitrate max/min/avg: 9000000/0/0 buffer size: 1835008 vbv_delay: N/A ffprobe -hide_banner dvd.mpg [mpeg @ 0x561effba3f00] start time for stream 0 is not set in estimate_timings_from_pts Input #0, mpeg, from 'dvd.mpg': Duration: 00:09:56.42, start: 0.160000, bitrate: 8266 kb/s Stream #0:0[0x1bf]: Data: dvd_nav_packet Stream #0:1[0x1e0]: Video: mpeg2video (Main), yuv420p(tv, bt470bg/unknown/unknown, progressive), 720x576 [SAR 64:45 DAR 16:9], 25 fps, 25 tbr, 90k tbn Side data: cpb: bitrate max/min/avg: 9000000/0/0 buffer size: 1835008 vbv_delay: N/A Stream #0:2[0x80]: Audio: ac3, 48000 Hz, stereo, fltp, 224 kb/s mediainfo dvd.m2v | egrep "Color|pixels|Scan" Width : 720 pixels Height : 576 pixels Color space : YUV Scan type : Progressive mediainfo dvd.mpg | egrep "Color|pixels|Scan" Width : 720 pixels Height : 576 pixels Color space : YUV Scan type : Progressive 3. Dvd Interlaced Chroma With reference to the CinGG manual https://cinelerra-gg.org/download/CinelerraGG_Manual/Dvd_Interlaced_Chroma.… /Now you can use the YUV420P DVD Interlace Mode when rendering DV directly to mpeg2 through a yuv4mpeg stream and when using video effects on HDV video./ /With this option enabled, improved chroma results will be obtained from your DV or HDV source. Editing DV or HDV and rendering it back to the same format does not require any special handling. In order to perform colorspace conversions correctly in CINELERRA-GG and avoid Chroma errors for interlaced 4:2:0 video, check the box as follows:/ Settings → Performance → YUV420P DVD Interlace Mode I can't find this option and is it relevant for DVD rendering? 4. Missing FFMPEG output According to the manual: https://cinelerra-gg.org/download/CinelerraGG_Manual/DVD_Bluray_Creation.ht… I/t is also highly recommended to run the CINELERRA-GG startup from a terminal window, instead of the icon, in order to see informative messages of how to actually write the output (at prompt: keyin <install_directory_path/bin/cin). / For the default mpeg2enc DVD rendering there is output like mpeg2enc -v 0 -b 8000 -q 1 -a 3 -F 3 -H -I 1 -M 8 -z t -f 8 -g 15 -G 15 -R 0 -o '/home/terje/Videoklipp/DVD/dvd_mpeg2enc_20230527-184531/dvd.m2v' For the optional FFMEG DVD Rendering it would be nice to also get the actual "ffmpeg code line" as terminal output, both for learning, customizing and debugging. Is that possible ?

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zimg 2.8
by Andrew Randrianasulu 03 Jun '23

03 Jun '23

Builds on gcc 11.2 (with patch) and seems to require only c++11 support as minimum ... https://bugs.gentoo.org/721676 just one liner (adding include) https://github.com/sekrit-twc/zimg/commit/9ae36d7d5f7420eaacd9644451933512f… wget https://github.com/sekrit-twc/zimg/archive/release-2.8.tar.gz not sure if ffmpeg 5.1 still supports this ...

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