May 2025 - Cin - Cinelerra-GG Mailing Lists

Re: [Cin] [Libav-user] Dynamic_input filters and avfilter_pad_get_type
by Andrew Randrianasulu 18 Nov '25

18 Nov '25

On Sat, May 10, 2025 at 9:05 AM Paul B Mahol <onemda(a)gmail.com> wrote: > > > > On Fri, May 9, 2025 at 11:38 PM Andrew Randrianasulu <randrianasulu(a)gmail.com> wrote: >> >> I was looking at why our application (cinelerra-gg) crashed at trying to use libplacebo >> >> I found that libplacebo defines itself >> >> https://ffmpeg.org/doxygen/7.0/vf__libplacebo_8c.html >> >> as >> >> .flags = AVFILTER_FLAG_HWDEVICE | AVFILTER_FLAG_DYNAMIC_INPUTS, >> >> so only output pad is defined, as far as I can see: >> >> static const AVFilterPad libplacebo_outputs[] = { >> { >> .name = "default", >> .type = AVMEDIA_TYPE_VIDEO, >> .config_props = &libplacebo_config_output, >> }, >> }; >> >> >> >> then when our code calls >> >> avfilter_pad_get_type() > > > You need to call it only after filtergraph have been configured, not before because in such cases number of output pads may be 0 before configuration. > In any case you need to check current number of input pads and output pads for each filter before trying to access them. > Thanks. Attached patch makes this crash go away, just 32-bit cingg can't cope with 4k frames filtering en-masse :) Andrea, can you test attached patch + this opts file put alongside test 4k HDR video decodable by hardware? > >> >> >> it promptly crashes. >> >> BC_Signals::dump_stack >> cin() [0x8b2c9e2] >> linux-gate.so.1(__kernel_rt_sigreturn+0) [0xf7fb8590] >> cin(avfilter_pad_get_type+0x14) [0x99266a4] >> cin(_ZN13FFVideoStream13create_filterEPKc+0xbc) [0x865669c] >> cin(_ZN6FFMPEG12open_decoderEv+0x80f) [0x865732f] >> cin(_ZN10FileFFMPEG9check_sigEP5Asset+0x81) [0x8670071] >> cin(_ZN4File5probeEv+0x376) [0x867cd86] >> cin(_ZN4File9open_fileEP11PreferencesP5Assetii+0x378) [0x867d628] >> cin(_ZN7MWindow14load_filenamesEP9ArrayListIPcEiii+0x250) [0x87301f0] >> cin(_ZN17CommandLineThread3runEv+0x53) [0x86e2cd3] >> cin(_ZN6Thread10entrypointEPv+0x41) [0x8b70c11] >> /lib/libpthread.so.0(+0x7328) [0xf7df9328] >> /lib/libc.so.6(clone+0x66) [0xf0373f06] >> >> >> >> We still hope to get libplacebo's tonemapping + vulkan hevc decoding going, so any pointers how to talk to those dynamic_input filters will be useful. Even swscale is dynamic_input in ffmpeg 7.1+, so I (we) really hope to keep it working, too. >> >> Code: >> >> https://git.cinelerra-gg.org/git/?p=goodguy/cinelerra.git;a=blob;f=cinelerr… >> >> >> >> _______________________________________________ >> Libav-user mailing list >> Libav-user(a)ffmpeg.org >> https://ffmpeg.org/mailman/listinfo/libav-user >> >> To unsubscribe, visit link above, or email >> libav-user-request(a)ffmpeg.org with subject "unsubscribe". > > _______________________________________________ > Libav-user mailing list > Libav-user(a)ffmpeg.org > https://ffmpeg.org/mailman/listinfo/libav-user > > To unsubscribe, visit link above, or email > libav-user-request(a)ffmpeg.org with subject "unsubscribe".

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Segmented Recording from input stream
by Terje J. Hanssen 23 Jun '25

23 Jun '25

Is it possible with CinGG's Record utility (via FFMPEG) to record a stream to file segments of same duration or file size and use auto-naming? Typical example: Record a video/audio input stream (i.e from playing a camcorder tape cassette) and encode to output file segments of 10 minutes or 10 GB each and auto-name file numbers. Similar example code using an input file instead at https://unix.stackexchange.com/questions/1670/how-can-i-use-ffmpeg-to-split… Just use what is built into ffmpeg to do exactly this. |ffmpeg -i invid.mp4 -threads 3 \ -vcodec copy *-f segment -segment_time 10:00 \ -reset_timestamps 1 \ cam_out_h264_%02d.mp4* | This will split it into roughly 10-minute chunks, split at the relevant keyframes, and will output to the files *|cam_out_h264_01.mp4|, |cam_out_h264_02.mp4|*, etc. Terje J. H

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Discovered problem with future ffmpeg 8.0
by Phyllis Smith 13 Jun '25

13 Jun '25

After applying current ffmpeg.git as of May 25: ae0f71a387f05be7ac90d545af4d3aeb8e1cca89 and applying Andrew's patches: 0001-Add-check-for-nb_inputs-before-calling-avfilter_get_.patch 0002-Same-possible-crash-fix-in-ffstreamaudio-for-dynamic.patch 0003-Do-not-filter-out-dynamic_input-filters.patch 0004-HACK-ffmpeg-8.0-build.patch CinGG builds but none of the ffmpeg plugins work. The Video plugins crash (did not try them all, but a few like F_boxblur) when added to the timeline and then click on "Show Controls. The Audio plugins do not crash but you get the warning tone only when you play them (again, I did not try them all, but F_chorus was one of them). I have not looked at the code yet, but most likely it is just an oversight in trying to get it to compile. Also, line 77 in 0004-HACK-ffmpeg-8.0-build.patch has "#esle" instead of "else".

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Apple's EDR technology
by Andrew Randrianasulu 02 Jun '25

02 Jun '25

https://m.youtube.com/watch?v=COxAt8pl_Xw "WWDC21: Explore HDR rendering with EDR | Apple" 34 min runtime What I found interesting that Apple used internal floating-point representation with some values ABOVE 1.0f but those values probably can't leak into final video, at best they might remain inside OpenEXR image format captured at some point "as is" (?) There is textual (but more iOS /mobile oriented) description with pictures: https://medium.com/@maxwellyuchenlong/wwdc22-10113-10114-110565-explore-edr… ===== *Reference Mode* Reference mode is a new display mode for color-intensive workflows that pin settings and block out distractions to provide more objective and reliable reference results for a variety of common videos, such as color grading, editing, and content mode, similar to the reference presets on macOS. When you enable the reference mode, you will have the following features: - The SDK peak brightness is fixed at 100 nits and the HDR peak brightness is fixed at 1000 nits, so there is a 10x EDR headroom. - Disables HDR tone mapping to provide one-to-one media display mapping. - Disables all display dynamic adjustments that occur to adapt to the environment, such as True Tone, Auto Brightness, and Night Shift modes, and instead allows the user to fine-calibrate the white point manually. === end of quotation ==== At least back in 2021 Apple was still using Metal (their Vulkan-like graphics API) and OpenGL for system-wide compositing, not sure if it changed or not lately? Still I am not sure how this provides HDR-like experience on SDR display (may be by using dynamic mapping?) Of course this is just tip of the iceberg I found in few minutes at the morning.

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Record camcorder video stream via v4l2 and hdmi-usb3 capture as input device
by Terje J. Hanssen 29 May '25

29 May '25

I tried to Record camcorder video stream via v4l2 and hdmi-usb3 capture as input device. ms2130 is more powerful but else similar to the usb2 EasyCap device example described in the CinGG manual https://cinelerra-gg.org/download/CinelerraGG_Manual/Use_Case_1_a_EasyCap.h… My Sony FX7-E 1080i50 HDV camcorder was connected via HDMI to a ms2130 usb3 capture card. My procedure description here on openSUSE Tumbleweed-Slowroll, kernel 6.12.30-1.0.4.sr20250501-longterm ~/Applications> ./CinGG-20250430-x86_64.AppImage Cinelerra Infinity - built: Apr 30 2025 07:18:32 1) Settings > Preferences > Record * File format: FFMPEG mp4 Video In: * Record driver: Video4Linux2 /dev(video0 The first thing I noticed was that default Record video setting was SD NTSC, not PAL as else according to my time zone. Could this possibly be changed as else? * Frames to record on disk: 30 (default)? Changed frame to a camcorder resolution and fps supported by v4l2 and ms2130: * Frame: 1920 x 1080 (was default NTSC SD) * fps: 50 (progressive) File > Record r Two windows opened, one showing the running record time etc. and the other the camera window image. My simple question are: 1. Should the video stream be "recorded" and stored somewhere (according to some settings)? 2. Can it be saved as a video file type on disk? I am also interested to see if yuv422p color sampling is retained. A copy from the running terminal: BC_DisplayInfo::gl_fb_config failed DeviceV4L2Base::v4l2_open pixels="YUYV"; res="1920x1080 1600x1200 1360x768 1280x1024 1280x960 1280x720 1024x768 800x600 720x576 720x480 640x480" v4l2 s_fmt 1920x1080 YUYV DeviceV4L2Base::v4l2_open VIDIOC_S_STD: Uegnet «ioctl» for enhet Terje J. Hanssen '

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New forum question at:
by Phyllis Smith 27 May '25

27 May '25

https://www.cinelerra-gg.org/forum/forum-hardware/record-from-minidv-hangs-…

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vaapi speedup patch (for ffmpeg.git)
by Andrew Randrianasulu 27 May '25

27 May '25

At some point it hopefully landed in, well, ffmpeg main repo, but for now I manually downloaded mbox and applied with git am to ffmpeg tree. https://patchwork.ffmpeg.org/project/ffmpeg/patch/20250507120326.156062-3-n… makes vaapi 4k hevc hdr decode + opencl filtering go from 6.0 fps to 6.3 fps. ./ffmpeg -hwaccel vaapi -init_hw_device opencl=ocl -filter_hw_device ocl -i ~/K38_sdcard1/Documents/iPhone11_4K-recorder_59.940HDR10.mov -vf "format=p010,hwupload,tonemap_opencl=tonemap=mobius:param=0.01:desat=0:r=tv:p=bt709:t=bt709:m=bt709:format=nv12,hwdownload,format=nv12" -c:a copy -c:s copy -c:v rawvideo -an -f nut /dev/null

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Hwaccel FFV1 decoding and encoding
by Terje J. Hanssen 26 May '25

26 May '25

According to Phoronix 22 May 2025 : * FFmpeg FFV1 Vulkan Encoder Lands +35% Improvement For AMD, +50% For NVIDIA * No word on Intel performance benefits from this Vulkan encode optimization. AFAIK Intel has not yet QSV support for FFV1 either. Any idea which ffmpeg version release ffv1_vulkan will be available ? And which color bit depths will be supported: 8-bit yuv422p and 10-bit yuv422p10le/ y210 ? Speed tests? Terje J. H

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System ffmpeg Vulkan video transcoding fails - while benchmarking works
by Terje Hanssen 26 May '25

26 May '25

I have yet to get my system ffmpeg vulkan video transcoding to work on my machines, while benchmarking works. Therefore I hope get verified if my code line is correct, and how to fix possible syntax errors. ----------------- Dell XPS 13-9370 ultrabook ffmpeg version 7.1.1 built with gcc 14 (SUSE Linux) inxi -CGSz System: Kernel: 6.12.24-1.0.2.sr20250402-longterm arch: x86_64 bits: 64 Desktop: GNOME v: 48.0 Distro: openSUSE Tumbleweed-Slowroll 20250402 CPU: Info: quad core model: Intel Core i7-8550U bits: 64 type: MT MCP cache: L2: 1024 KiB Speed (MHz): avg: 900 min/max: 400/4000 cores: 1: 900 2: 900 3: 900 4: 900 5: 900 6: 900 7: 900 8: 900 Graphics: Device-1: Intel UHD Graphics 620 driver: i915 v: kernel Device-2: Realtek Integrated_Webcam_HD driver: uvcvideo type: USB Display: wayland server: X.org v: 1.21.1.15 with: Xwayland v: 24.1.6 compositor: gnome-shell driver: gpu: i915 resolution: 3840x2160~60Hz API: OpenGL v: 4.6 vendor: intel mesa v: 25.0.3 renderer: Mesa Intel UHD Graphics 620 (KBL GT2) API: Vulkan v: 1.4.309 drivers: N/A surfaces: xcb,xlib,wayland API: EGL Message: EGL data requires eglinfo. Check --recommends. Info: Tools: api: glxinfo,vulkaninfo x11: xprop,xrandr ========================= export VK_ICD_FILENAMES=/usr/share/vulkan/icd.d/intel_icd.x86_64.json export ANV_VIDEO_DECODE=1 export ANV_VIDEO_ENCODE=1 Transcoding fails: ffmpeg -hide_banner -init_hw_device vulkan=vk:0 -filter_hw_device vk -i hdv09_04_h264_qsv_8b420.mp4 -c:v hevc_vulkan test_hevc.mp4 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'hdv09_04_h264_qsv_8b420.mp4': Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 encoder : Lavf61.1.100 Duration: 00:03:58.88, start: 0.000000, bitrate: 7671 kb/s Stream #0:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, smpte170m/unknown/unknown, progressive), 1440x1080 [SAR 4:3 DAR 16:9], 7536 kb/s, 25 fps, 25 tbr, 12800 tbn (default) Metadata: handler_name : VideoHandler vendor_id : [0][0][0][0] Stream #0:1[0x2](eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 129 kb/s (default) Metadata: handler_name : SoundHandler vendor_id : [0][0][0][0] Stream mapping: Stream #0:0 -> #0:0 (h264 (native) -> hevc (hevc_vulkan)) Stream #0:1 -> #0:1 (aac (native) -> aac (native)) Press [q] to stop, [?] for help Impossible to convert between the formats supported by the filter 'Parsed_null_0' and the filter 'auto_scale_0' [vf#0:0 @ 0x561e923dd540] Error reinitializing filters! [vf#0:0 @ 0x561e923dd540] Task finished with error code: -38 (Function not implemented) [vf#0:0 @ 0x561e923dd540] Terminating thread with return code -38 (Function not implemented) [vost#0:0/hevc_vulkan @ 0x561e9243b200] Could not open encoder before EOF [vost#0:0/hevc_vulkan @ 0x561e9243b200] Task finished with error code: -22 (Invalid argument) [vost#0:0/hevc_vulkan @ 0x561e9243b200] Terminating thread with return code -22 (Invalid argument) [out#0/mp4 @ 0x561e924a7a00] Nothing was written into output file, because at least one of its streams received no packets. frame= 0 fps=0.0 q=0.0 Lsize= 0KiB time=N/A bitrate=N/A speed=N/A [aac @ 0x561e92cc4f80] Qavg: 208.809 Conversion failed! ===================== Benchmarking works: ffmpeg -hide_banner -init_hw_device "vulkan=vk:0" -hwaccel vulkan -hwaccel_output_format vulkan -i hdv09_04_h264_qsv_8b420.mp4 -f null - -benchmark Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'hdv09_04_h264_qsv_8b420.mp4': Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 encoder : Lavf61.1.100 Duration: 00:03:58.88, start: 0.000000, bitrate: 7671 kb/s Stream #0:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, smpte170m/unknown/unknown, progressive), 1440x1080 [SAR 4:3 DAR 16:9], 7536 kb/s, 25 fps, 25 tbr, 12800 tbn (default) Metadata: handler_name : VideoHandler vendor_id : [0][0][0][0] Stream #0:1[0x2](eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 129 kb/s (default) Metadata: handler_name : SoundHandler vendor_id : [0][0][0][0] Stream mapping: Stream #0:0 -> #0:0 (h264 (native) -> wrapped_avframe (native)) Stream #0:1 -> #0:1 (aac (native) -> pcm_s16le (native)) Press [q] to stop, [?] for help Output #0, null, to 'pipe:': Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 encoder : Lavf61.7.100 Stream #0:0(und): Video: wrapped_avframe, vulkan(pc, smpte170m/unknown/unknown, progressive), 1440x1080 [SAR 4:3 DAR 16:9], q=2-31, 200 kb/s, 25 fps, 25 tbn (default) Metadata: handler_name : VideoHandler vendor_id : [0][0][0][0] encoder : Lavc61.19.101 wrapped_avframe Stream #0:1(eng): Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s (default) Metadata: handler_name : SoundHandler vendor_id : [0][0][0][0] encoder : Lavc61.19.101 pcm_s16le

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mpeg4 ASP and vaapi
by Andrew Randrianasulu 25 May '25

25 May '25

According to Arch Wiki https://wiki.archlinux.org/title/Hardware_video_acceleration you need MPEG-4 Part 2 is disabled by default due to VAAPI limitations. Set the environment variable <https://wiki.archlinux.org/title/Environment_variable> VAAPI_MPEG4_ENABLED=true to try to use it anyway. I tried with cingg/ffmpeg7 and it seemed to work, but ffmpeg7 had all our patches including patch8

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