April 2025 - ffmpeg-user - lists.ffmpeg.org

Would it be possible to load xattr-related media-files like a container?
by Peter B. 02 Aug '25

02 Aug '25

Hi everyone :) I'm working a lot with extended attributes on filesystems, and I'm amazed! I was wondering if it would be possible for ffmpeg to load "related media-streams" as related objects: Having a 0-Byte "videofile.aha": * video = /path/to/my_movie.h264 * audio = ./my_movie-DE_AT.flac * audio.1 = my_movie-EN_GB.mp3 * video.default = video * audio.default = audio.1 * dc.title = "My Movie" * dc.creator = "..." * ... Like an input demuxer which resolves the related objects and treats this like loading a container? I imagine this to be quite fun (and useful actually). One could then drag-and-drop to remux tracks, and right-click-edit metadata, I imagine. Feedback greatly appreciated :) Have a great day! Peter

1 1

Audio delay on part of video
by tasos 10 May '25

10 May '25

Hello. I would like to ask if it is possible to delay the audio streams of a video , but for a specific time range. Something like using -ss -to combined with -itsoffset. More specifically from half-till the end of the video. Thanks!

4 7

libplacebo in 7.1.1 and vaapi decode/encode on rx550
by Andrew Randrianasulu 27 Apr '25

27 Apr '25

I am trying to explore new world of Vulkan. Just compiled vulkan-sdk 1.4.304 and thus ffmpeg 7.1.1 with libplacebo and vulkan filters/hwaccels/encode. Because Vulkan decode for some reason does not work on my AMD RX550 (polaris12) even with RADV_VIDEO_ENCODE=1 RADV_VIDEO_DECODE=1 I am trying to make libplacebo's tonemap cooperate with vaapi bash-5.1$ ./bin/ffmpeg711-vulkan -init_hw_device vulkan -hwaccel vaapi -hwaccel_output_format vaapi -i ~/K38_sdcard1/Documents/iPhone11_4K-recorder_59.940HDR10.mov -vf libplacebo=colorspace=bt709:color_primaries=bt709:color_trc=bt709:range=tv -c:a copy -c:v hevc_vulkan -f avi /dev/null ffmpeg version 7.1.1 Copyright (c) 2000-2025 the FFmpeg developers built with gcc 11.2.0 (GCC) configuration: --enable-opencl --disable-debug --enable-libx265 --enable-libx264 --enable-gpl --enable-libplacebo --enable-vulkan --enable-libshaderc libavutil 59. 39.100 / 59. 39.100 libavcodec 61. 19.101 / 61. 19.101 libavformat 61. 7.100 / 61. 7.100 libavdevice 61. 3.100 / 61. 3.100 libavfilter 10. 4.100 / 10. 4.100 libswscale 8. 3.100 / 8. 3.100 libswresample 5. 3.100 / 5. 3.100 libpostproc 58. 3.100 / 58. 3.100 [aist#0:1/pcm_s16le @ 0xb1ff740] Guessed Channel Layout: stereo Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/home/guest/K38_sdcard1/Documents/iPhone11_4K-recorder_59.940HDR10.mov': Metadata: major_brand : qt minor_version : 0 compatible_brands: qt creation_time : 2020-12-18T22:20:29.000000Z com.apple.quicktime.creationdate: 2020-12-18T17:20:29-0500 com.apple.quicktime.location.ISO6709: +33.4233-084.5802/ Duration: 00:00:19.16, start: 0.000000, bitrate: 69140 kb/s Stream #0:0[0x1](und): Video: hevc (Main 10) (hvc1 / 0x31637668), yuv420p10le(pc, bt2020nc/bt2020/smpte2084), 3840x2160, 64166 kb/s, 59.92 fps, 59.94 tbr, 600 tbn (default) Metadata: creation_time : 2020-12-18T22:20:29.000000Z handler_name : Core Media Video vendor_id : [0][0][0][0] encoder : HEVC Stream #0:1[0x2](und): Audio: pcm_s16le (lpcm / 0x6D63706C), 48000 Hz, stereo, s16, 1536 kb/s (default) Metadata: creation_time : 2020-12-18T22:20:29.000000Z handler_name : Core Media Audio vendor_id : [0][0][0][0] File '/dev/null' already exists. Overwrite? [y/N] y Stream mapping: Stream #0:0 -> #0:0 (hevc (native) -> hevc (hevc_vulkan)) Stream #0:1 -> #0:1 (copy) Press [q] to stop, [?] for help There are 2 hardware devices. device vaapi0 of type vaapi is picked for filters by default. Set hardware device explicitly with the filter_hw_device option if device vaapi0 is not usable for filters. Impossible to convert between the formats supported by the filter 'graph -1 input from stream 0:0' and the filter 'auto_scale_0' [vf#0:0 @ 0xb1fe380] Error reinitializing filters! [vf#0:0 @ 0xb1fe380] Task finished with error code: -38 (Function not implemented) [vost#0:0/hevc_vulkan @ 0xb200200] Could not open encoder before EOF [vost#0:0/hevc_vulkan @ 0xb200200] Task finished with error code: -22 (Invalid argument) [vost#0:0/hevc_vulkan @ 0xb200200] Terminating thread with return code -22 (Invalid argument) [vf#0:0 @ 0xb1fe380] Terminating thread with return code -38 (Function not implemented) [out#0/avi @ 0xb1e8d80] 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 Conversion failed! ow! And adding -filter_hw_device vulkan only result in ash-5.1$ ./bin/ffmpeg711-vulkan -init_hw_device vulkan -filter_hw_device vulkan -hwaccel vaapi -hwaccel_output_format vaapi -i ~/K38_sdcard1/Documents/iPhone11_4K-recorder_59.940HDR10.mov -vf libplacebo=colorspace=bt709:color_primaries=bt709:color_trc=bt709:range=tv -c:a copy -c:v hevc_vulkan -f avi /dev/null ffmpeg version 7.1.1 Copyright (c) 2000-2025 the FFmpeg developers built with gcc 11.2.0 (GCC) configuration: --enable-opencl --disable-debug --enable-libx265 --enable-libx264 --enable-gpl --enable-libplacebo --enable-vulkan --enable-libshaderc libavutil 59. 39.100 / 59. 39.100 libavcodec 61. 19.101 / 61. 19.101 libavformat 61. 7.100 / 61. 7.100 libavdevice 61. 3.100 / 61. 3.100 libavfilter 10. 4.100 / 10. 4.100 libswscale 8. 3.100 / 8. 3.100 libswresample 5. 3.100 / 5. 3.100 libpostproc 58. 3.100 / 58. 3.100 Invalid filter device vulkan. Failed to set value 'vulkan' for option 'filter_hw_device': Invalid argument Error parsing global options: Invalid argument Any idea how to proceed?

2 2

Ah, no vaapi-vulkan interop on gfx8!
by Andrew Randrianasulu 26 Apr '25

26 Apr '25

Feature request: https://gitlab.freedesktop.org/mesa/mesa/-/issues/11074 https://gitlab.freedesktop.org/mesa/mesa/-/issues/5882 found via this post on reddit: https://www.reddit.com/r/jellyfin/comments/y7zns9/vulkan_filtering_on_amd_v… ==== However, there are still some limitations from upstream. First of all, the essential Vulkan extension *VK_EXT_image_drm_format_modifier* is currently *only available on Vega and newer cards/gfx9+*, which means that Polaris and older <https://gitlab.freedesktop.org/mesa/mesa/-/issues/5882> users will need to wait until upstream to complete the extension before they can get support for this. In addition, DRM changes are involved, so the Linux *kernel requires 5.15+*. ====

1 0

HTTP to RTSP conversion not working, framerate issue ?
by Adam Cécile (Le_Vert) 21 Apr '25

21 Apr '25

Hello, I'm struggling with FFMPEG to convert a specific camera stream with shitty format and non-deterministic framerate to RTSP endpoint as H264. I came up with this following command: ffmpeg -f mxg -probesize 32 -fflags nobuffer -i 'http://admin:admin@10.10.10.10/cgi-bin/faststream.jpg?stream=MxPEG&fps=25&j…' -vsync vfr -vf 'crop=iw/2:ih:0:0' -flags low_delay -preset ultrafast -vcodec libx264 -an -tune zerolatency -loglevel info -hide_banner -nostats -f rtsp rtsp://localhost::8554/7618 Producing the following output: [mxg @ 0x562ffddf1540] Stream #0: not enough frames to estimate rate; consider increasing probesize Input #0, mxg, from 'http://admin:ad@10.10.10.10/cgi-bin/faststream.jpg?stream=MxPEG&fps=25&jphe…': Duration: N/A, start: 1744980937.474607, bitrate: 64 kb/s Stream #0:0: Video: mxpeg, yuvj420p(pc, bt470bg/unknown/unknown), 1280x480, 1000k tbr, 1000k tbn, 1000k tbc Stream #0:1: Audio: pcm_alaw, 8000 Hz, mono, s16, 64 kb/s Stream mapping: Stream #0:0 -> #0:0 (mxpeg (native) -> h264 (libx264)) Press [q] to stop, [?] for help [libx264 @ 0x562ffddfb380] MB rate (1200000000) > level limit (16711680) [libx264 @ 0x562ffddfb380] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2 [libx264 @ 0x562ffddfb380] profile Constrained Baseline, level 6.2, 4:2:0, 8-bit 2025/04/18 12:55:39 INF [RTSP] [conn 127.0.0.1:57966] opened 2025/04/18 12:55:39 INF [RTSP] [session 24e2616d] created by 127.0.0.1:57966 2025/04/18 12:55:39 INF [RTSP] [session 24e2616d] is publishing to path '7618', 1 track (H264) Output #0, rtsp, to 'rtsp://localhost:8554/7618': Metadata: encoder : Lavf58.45.100 Stream #0:0: Video: h264 (libx264), yuvj420p(pc), 640x480, q=-1--1, 1000k fps, 90k tbn, 1000k tbc Metadata: encoder : Lavc58.91.100 libx264 Side data: cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A It runs fine, but I cannot read anything back from the target RTSP server. However, running the command with "-f mp4 /tmp/dump.mp4" produce a perfectly valid H264 file, with correct speed (i have timestamp superimposed in video). My guess is that there is a timestamp/framerate issue but I have no idea how to fix that. Can you point me to the correct direction ? Maybe ignore completely input framerate and generate clean native 25 fps for output ? Thanks in advance, Best regards, Adam.

2 1

Dual Mono Support
by Lucas 17 Apr '25

17 Apr '25

I think ffmpeg should support dual mono directly. It can already be done manually in ffmpeg, but it should be implemented as a convenience feature. 1. Background "Dual mono" is when a 1.0 mono signal is copied into a 2.0 stereo track. The stereo track is identical in the L/R channels. This cannot be achieved with a simple 2.0 downmix (-ac 2) because an L signal will be on the L track (not in the R track at all), and likewise the R signal will not appear in the L track. 2. Use cases There are a few reasons to use dual mono, some of which have been implemented in commercial products: a. Compatibility DVDs and blu-rays are hardly ever manufactured for true mono. They are technically supported by AV receivers ("AVRs") in e.g. AC3, DTS-HD, and so on. However, it seems for best compatibility and experience for non-audiophiles, the discs simply put an identical or near-identical mono stream in each of L and R signal. That way if the viewer happens to have an L/R 2.0 system, they get sound out of both speakers. AVRs are capable of receiving dual-mono and mixing it down into a true 1.0 signal for the center channel (e.g. FC in 5.1). Stereo is supported by millions of devices that have already been manufactured. It goes back to the 1950s or so (1970s for sure). Stereo sound is the de facto standard of older and cheaper computers, TVs, and so on. b. Accessibility Some devices (cell phones) implement a mono downmix feature. This can help with various disabilities and neurodiversities which I will not go into here. c. Earbud sharing With dual mono, two people can watch on one pair of earbuds. This can be useful when traveling. d. Simpler support for true mono The real reason this concept interests me is that with dual mono, you can turn a stereo amp and a single speaker into a 'true mono' amp and speaker setup. As mentioned in (2a), most devices are built for 2.0 or 5.1. They don't come with specific "mono out". If you want to save money and have one single speaker, you'd have to buy a 5.1 AVR, 5.1-capable player, and possibly a 5.1-capable TV. Further, only since 2005 or so have "HD" AVRs been available, supporting uncompressed 5.1 sound. This needlessly adds to the cost, when a receiver from 1990 can still play uncompressed stereo. At least 2 TVs I own, of varying price points and model years, do not offer mono out. By letting ffmpeg handle the dual-mono mix, all you need is a stereo-capable playback chain. 3. Existing ffmpeg support The best way I've found to do dual-mono in ffmpeg is to manually specify a custom downmix. This is really designed for a 5.1->2.0 dual mono mix, and I can't speak to how other channel layouts into dual mono will compare with ffmpeg's default `-ac 2` mix. It looks like ffmpeg implements the ATSC formula [1] but I can't find where in the code it does this. In theory, you could also just set `-ac 1` and let your player work it out. But this relies on correct player behavior. # ATSC spec, same as ffmpeg -ac 1 (but creates dual mono not single mono) -af "pan=stereo|FL < 1.0*FL + 1.414*FC + 1.0*FR + 0.707*SL + 0.707*SR|FR < 1.0*FL + 1.414*FC + 1.0*FR + 0.707*SL + 0.707*SR" 4. Implementing in ffmpeg This is where I need help. Would it be best to implement it as a "channel layout" in channel_layout.c ? 5. Links 1: https://superuser.com/questions/852400/properly-downmix-5-1-to-stereo-using… https://ffmpeg.org/ffmpeg-utils.html#Channel-Layout https://trac.ffmpeg.org/wiki/AudioChannelManipulation 6. Detailed notes on ATSC downmix and mono in ffmpeg set FL to this, "<" normalizes without clipping FL < 1.0*FL + 2.0*clev*FC + 1.0*FR + slev*BL + slev*BR set FR to the same (mono mix, same audio in FL and FR) FR < 1.0*FL + 2.0*clev*FC + 1.0*FR + slev*BL + slev*BR clev may be one of: 0.707 (-3.0 dB) 0.595 (-4.5 dB) 0.500 (-6.0 dB) "reserved" slev may be one of: 0.707 (-3.0 dB) 0.500 (-6.0 dB) 0.000 "reserved" If the cmixlev or surmixlev bit fields indicate the reserved state (value of ‘11’), the decoder should use the intermediate coefficient values indicated by the bit field value of 0 1. If the Center channel is missing (2/1 or 2/2 mode), the same equations may be used without the C term. If the surround channels are missing, the same equations may be used without the Ls, Rs, or S terms. # ATSC spec, same as ffmpeg -ac 1 (but creates dual mono not single mono) -af "pan=stereo|FL < 1.0*FL + 1.414*FC + 1.0*FR + 0.707*SL + 0.707*SR|FR < 1.0*FL + 1.414*FC + 1.0*FR + 0.707*SL + 0.707*SR" # other ATSC formulas, not used by default -af "pan=stereo|FL < 1.0*FL + 1.414*FC + 1.0*FR + 0.500*SL + 0.500*SR|FR < 1.0*FL + 1.414*FC + 1.0*FR + 0.500*SL + 0.500*SR" -af "pan=stereo|FL < 1.0*FL + 1.414*FC + 1.0*FR + 0.0*SL + 0.0*SR|FR < 1.0*FL + 1.414*FC + 1.0*FR + 0.0*SL + 0.0*SR"

1 0

Hidden audio in H264 - wrapped_avframe
by Hans Schuell (GiraOne) 14 Apr '25

14 Apr '25

I am struggling with the camera output of a HQCAM camera from AliExpress, when the video is written to the SD card. The output video files on the SD card contain video (H264) and audio (G726). With the Windows based CONVERTER.EXE provided by HQCAM, I can convert them to AVI with video and audio present. The problem is: the CONVERTER.EXE is a UI based tool, where I have to select each single file, but I have to automate it. I would like to use ffmpeg for this. When I use ffmpeg -hide_banner -i file.h264 -t 0 -f null - I get: Input #0, h264, from 'file.264': Duration: N/A, bitrate: N/A Stream #0:0: Video: h264 (High), yuvj420p(pc, bt709, progressive), 1920x1080, 25 fps, 1200k tbr, 1200k tbn Stream mapping: Stream #0:0 -> #0:0 (h264 (native) -> wrapped_avframe (native)) Press [q] to stop, [?] for help Output #0, null, to 'pipe:': Metadata: encoder : Lavf61.9.108 Stream #0:0: Video: wrapped_avframe, yuvj420p(pc, bt709, progressive), 1920x1080, q=2-31, 200 kb/s, 25 fps, 25 tbn Metadata: encoder : Lavc61.33.102 wrapped_avframe [h264 @ 00000260240298c0] Invalid NAL unit 0, skipping. [h264 @ 00000260240298c0] no frame! [out#0/null @ 000002602402df00] video:0KiB audio:0KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: unknown [out#0/null @ 000002602402df00] Output file is empty, nothing was encoded(check -ss / -t / -frames parameters if used) frame= 0 fps=0.0 q=0.0 Lsize=N/A time=N/A bitrate=N/A speed=N/A For me this output is difficult read. Using the ffmpeg command, that works using the RTSP port of the camera: ffmpeg -i file.h264 -hide_banner -loglevel warning -err_detect ignore_err -dn -sn -map 0:0 -codec:v copy -map 0:1 -filter:a aresample=osr=8000:ochl=mono -codec:a aac -b:a 64k -shortest file.mp4 it doesn't work. It leads to Stream map '' matches no streams. To ignore this, add a trailing '?' to the map. Failed to set value '0:1' for option 'map': Invalid argument Unfortunately, I found no information what "wrapped_avframe" means and how I can convert such content to MP4/H264/AAC with ffmpeg. Can anybody help on this?

2 3

*_vulkan filters segmentation fault 11
by Christian Ebert 11 Apr '25

11 Apr '25

Hi, I cannot get hwaccel vulkan filters to work. Every filter I tried segfaults, see nlmeans_vulkan example below. Happy (well, not entirely) to report it as a bug, but maybe I am missing something? $ sw_vers ProductName: macOS ProductVersion: 15.4 BuildVersion: 24E248 $ vkvia VIA_INFO: SDK Found! - Will attempt to run tests VIA_INFO: Attempting to run ./vkcube in /Users/me/VulkanSDK/1.4.309.0/macOS/../Applications/vkcube.app/Contents/MacOS VIA_INFO: Command-line: ./vkcube --c 100 --suppress_popups Selected WSI platform: metal Selected GPU 0: Apple M1 Pro, type: IntegratedGpu VIA_INFO: Command-line: ./vkcube --c 100 --suppress_popups --validate Selected WSI platform: metal Selected GPU 0: Apple M1 Pro, type: IntegratedGpu SUCCESS: Vulkan analysis completed properly using Vulkan 1.2 Here's a sample command and report: $ FFREPORT=file=ff_test-nlmeans_vulkan.log ffmpeg -init_hw_device vulkan=vk:0 -filter_hw_device vk -f lavfi -i testsrc=duration=10 -filter:v format=yuv420p,hwupload,nlmeans_vulkan,hwdownload test-nlmeans_vulkan.mpg ffmpeg started on 2025-04-07 at 16:18:15 Report written to "ff_test-nlmeans_vulkan.log" [...] see report below [...] Input #0, lavfi, from 'testsrc=duration=10': Duration: N/A, start: 0.000000, bitrate: N/A Stream #0:0: Video: wrapped_avframe, rgb24, 320x240 [SAR 1:1 DAR 4:3], 25 fps, 25 tbr, 25 tbn Stream mapping: Stream #0:0 -> #0:0 (wrapped_avframe (native) -> mpeg1video (native)) Press [q] to stop, [?] for help Segmentation fault: 11 Report: ffmpeg started on 2025-04-07 at 16:18:15 Report written to "ff_test-nlmeans_vulkan.log" Log level: 48 Command line: ffmpeg -init_hw_device "vulkan=vk:0" -filter_hw_device vk -f lavfi -i "testsrc=duration=10" -filter:v "format=yuv420p,hwupload,nlmeans_vulkan,hwdownload" test-nlmeans_vulkan.mpg ffmpeg version N-119137-g46762c8b82 Copyright (c) 2000-2025 the FFmpeg developers built with Apple clang version 17.0.0 (clang-1700.0.13.3) configuration: --prefix=/Users/me/.local --enable-gpl --enable-nonfree --enable-shared --enable-openssl --enable-pic --enable-libspeex --enable-libopus --enable-libfdk-aac --enable-libsvtav1 --enable-libx265 --enable-librav1e --enable-libx264 --enable-libmp3lame --enable-libbluray --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libaom --enable-libfreetype --enable-libfreetype --enable-libzimg --enable-libass --enable-libdvdread --enable-libdvdnav --enable-libvvenc --enable-vulkan --enable-libshaderc --extra-cflags='-I/opt/local/include -I/Users/me/VulkanSDK/1.4.309.0/macOS/include -I/opt/local/include/X11' --extra-libs='-L/opt/local/lib -L/Users/me/VulkanSDK/1.4.309.0/macOS/lib' --disable-htmlpages libavutil 60. 0.100 / 60. 0.100 libavcodec 62. 0.101 / 62. 0.101 libavformat 62. 0.100 / 62. 0.100 libavdevice 62. 0.100 / 62. 0.100 libavfilter 11. 0.100 / 11. 0.100 libswscale 9. 0.100 / 9. 0.100 libswresample 6. 0.100 / 6. 0.100 libpostproc 59. 0.100 / 59. 0.100 Splitting the commandline. Reading option '-init_hw_device' ... matched as option 'init_hw_device' (initialise hardware device) with argument 'vulkan=vk:0'. Reading option '-filter_hw_device' ... matched as option 'filter_hw_device' (set hardware device used when filtering) with argument 'vk'. Reading option '-f' ... matched as option 'f' (force container format (auto-detected otherwise)) with argument 'lavfi'. Reading option '-i' ... matched as input url with argument 'testsrc=duration=10'. Reading option '-filter:v' ... matched as option 'filter' (apply specified filters to audio/video) with argument 'format=yuv420p,hwupload,nlmeans_vulkan,hwdownload'. Reading option 'test-nlmeans_vulkan.mpg' ... matched as output url. Finished splitting the commandline. Parsing a group of options: global . Applying option init_hw_device (initialise hardware device) with argument vulkan=vk:0. [AVHWDeviceContext @ 0x6000031e0000] Supported layers: [AVHWDeviceContext @ 0x6000031e0000] VK_LAYER_LUNARG_api_dump [AVHWDeviceContext @ 0x6000031e0000] VK_LAYER_LUNARG_gfxreconstruct [AVHWDeviceContext @ 0x6000031e0000] VK_LAYER_KHRONOS_profiles [AVHWDeviceContext @ 0x6000031e0000] VK_LAYER_KHRONOS_validation [AVHWDeviceContext @ 0x6000031e0000] VK_LAYER_LUNARG_screenshot [AVHWDeviceContext @ 0x6000031e0000] VK_LAYER_KHRONOS_synchronization2 [AVHWDeviceContext @ 0x6000031e0000] VK_LAYER_KHRONOS_shader_object [AVHWDeviceContext @ 0x6000031e0000] Using instance extension VK_EXT_layer_settings [AVHWDeviceContext @ 0x6000031e0000] Using instance extension VK_KHR_portability_enumeration [AVHWDeviceContext @ 0x6000031e0000] GPU listing: [AVHWDeviceContext @ 0x6000031e0000] 0: Apple M1 Pro (integrated) (0xf030207) [AVHWDeviceContext @ 0x6000031e0000] Device 0 selected: Apple M1 Pro (integrated) (0xf030207) [AVHWDeviceContext @ 0x6000031e0000] Using device extension VK_KHR_portability_subset [AVHWDeviceContext @ 0x6000031e0000] Using device extension VK_KHR_push_descriptor [AVHWDeviceContext @ 0x6000031e0000] Using device extension VK_EXT_shader_atomic_float [AVHWDeviceContext @ 0x6000031e0000] Using device extension VK_EXT_external_memory_host [AVHWDeviceContext @ 0x6000031e0000] Queue families: [AVHWDeviceContext @ 0x6000031e0000] 0: graphics compute transfer (queues: 1) [AVHWDeviceContext @ 0x6000031e0000] 1: graphics compute transfer (queues: 1) [AVHWDeviceContext @ 0x6000031e0000] 2: graphics compute transfer (queues: 1) [AVHWDeviceContext @ 0x6000031e0000] 3: graphics compute transfer (queues: 1) [AVHWDeviceContext @ 0x6000031e0000] Using device: Apple M1 Pro [AVHWDeviceContext @ 0x6000031e0000] Alignments: [AVHWDeviceContext @ 0x6000031e0000] optimalBufferCopyRowPitchAlignment: 1 [AVHWDeviceContext @ 0x6000031e0000] minMemoryMapAlignment: 64 [AVHWDeviceContext @ 0x6000031e0000] nonCoherentAtomSize: 16 [AVHWDeviceContext @ 0x6000031e0000] minImportedHostPointerAlignment: 16384 [AVHWDeviceContext @ 0x6000031e0000] Using queue family 0 (queues: 1) for graphics [AVHWDeviceContext @ 0x6000031e0000] Using queue family 1 (queues: 1) for compute [AVHWDeviceContext @ 0x6000031e0000] Using queue family 2 (queues: 1) for transfers Applying option filter_hw_device (set hardware device used when filtering) with argument vk. Successfully parsed a group of options. Parsing a group of options: input url testsrc=duration=10. Applying option f (force container format (auto-detected otherwise)) with argument lavfi. Successfully parsed a group of options. Opening an input file: testsrc=duration=10. [AVFilterGraph @ 0x600000fe9ff0] Setting 'duration' to value '10' detected 10 logical cores [Parsed_testsrc_0 @ 0x6000011e8600] size:320x240 rate:25/1 duration:10.000000 sar:1/1 [AVFilterGraph @ 0x600000fe9ff0] query_formats: 2 queried, 3 merged, 0 already done, 0 delayed [lavfi @ 0x152e0a7c0] All info found Input #0, lavfi, from 'testsrc=duration=10': Duration: N/A, start: 0.000000, bitrate: N/A Stream #0:0, 1, 1/25: Video: wrapped_avframe, rgb24, 320x240 [SAR 1:1 DAR 4:3], 25 fps, 25 tbr, 25 tbn Successfully opened the file. Parsing a group of options: output url test-nlmeans_vulkan.mpg. Applying option filter:v (apply specified filters to audio/video) with argument format=yuv420p,hwupload,nlmeans_vulkan,hwdownload. Successfully parsed a group of options. Opening an output file: test-nlmeans_vulkan.mpg. [out#0/mpeg @ 0x6000011ec600] No explicit maps, mapping streams automatically... [vost#0:0/mpeg1video @ 0x152f0b8a0] Created video stream from input stream 0:0 [AVFilterGraph @ 0x600000fedea0] Setting 'pix_fmts' to value 'yuv420p' [file @ 0x600000ae3b00] Setting default whitelist 'file,crypto,data' Successfully opened the file. Stream mapping: Stream #0:0 -> #0:0 (wrapped_avframe (native) -> mpeg1video (native)) [vost#0:0/mpeg1video @ 0x152f0b8a0] Starting thread... [vf#0:0 @ 0x6000015e0320] Starting thread... [vist#0:0/wrapped_avframe @ 0x152f0aea0] [dec:wrapped_avframe @ 0x152f0a030] Starting thread... [in#0/lavfi @ 0x1548047d0] Starting thread... Press [q] to stop, [?] for help [AVFilterGraph @ 0x600000fe0000] Setting 'pix_fmts' to value 'yuv420p' [graph -1 input from stream 0:0 @ 0x6000011e0300] w:320 h:240 pixfmt:rgb24 tb:1/25 fr:25/1 sar:1/1 csp:gbr range:pc [format @ 0x6000011e0480] Setting 'pix_fmts' to value 'yuv420p' [format @ 0x6000011e0480] Setting 'color_ranges' to value 'tv' [auto_scale_0 @ 0x6000011ec840] w:iw h:ih flags:'' interl:0 [Parsed_format_0 @ 0x6000011e0000] auto-inserting filter 'auto_scale_0' between the filter 'graph -1 input from stream 0:0' and the filter 'Parsed_format_0' [AVFilterGraph @ 0x600000fe0000] query_formats: 7 queried, 15 merged, 3 already done, 0 delayed [auto_scale_0 @ 0x6000011ec840] w:320 h:240 fmt:rgb24 csp:gbr range:pc sar:1/1 -> w:320 h:240 fmt:yuv420p csp:unknown range:tv sar:1/1 flags:0x00000004 [auto_scale_0 @ 0x6000011ec840] [framesync @ 0x152f0d790] Selected 1/25 time base [auto_scale_0 @ 0x6000011ec840] [framesync @ 0x152f0d790] Sync level 1 [hwupload @ 0x600002ae0150] Surface format is yuv420p. [Parsed_nlmeans_vulkan_2 @ 0x6000011e0180] Reusing existing frames context Ideas anyone? TIA, Christian

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h254 -> av1 with VAAPI ?
by lejeczek 08 Apr '25

08 Apr '25

Hi guys. I'm trying to transcode a stream from a smartphone into a file: -> $ ffprobe rtsp://192.168.1.125:8080/video/h264 ... Duration: N/A, start: -3627.773756, bitrate: N/A Stream #0:0: Video: h264 (Constrained Baseline), yuv420p(progressive), 3840x2160, 90k tbr, 90k tbn -> $ ffmpeg -hwaccel vaapi -hwaccel_device /dev/dri/renderD128 -hwaccel_output_format vaapi -i rtsp://192.168.1.125:8080/video/h264 -avoid_negative_ts make_zero -fflags +genpts -c:v av1_vaapi -b:v 8M av1-h264.mp4 -y ... encoder : Lavf61.7.100 Stream #0:0: Video: av1 (Main) (av01 / 0x31307661), vaapi(tv, progressive), 3840x2160, q=2-31, 8000 kb/s, 24.58 fps, 18880 tbn Metadata: encoder : Lavc61.19.101 av1_vaapi frame= 32 fps= 32 q=-0.0 size= 1024KiB time=01:31:29.32 bitrate= 1.5kbits/s dup=0 drop=2 speed=5.49e+03x frame= 44 fps= 29 q=-0.0 size= 1280KiB time=01:31:29.81 bitrate= 1.9kbits/s dup=0 drop=2 speed=3.66e+03x frame= 58 fps= 29 q=-0.0 size= 1792KiB time=01:31:30.38 bitrate= 2.7kbits/s dup=0 drop=2 speed=2.74e+03x frame= 82 fps= 27 q=-0.0 size= 2560KiB time=01:31:31.36 bitrate= 3.8kbits/s dup=0 drop=2 speed=1.83e+03x frame= 94 fps= 27 q=-0.0 size= 3072KiB time=01:31:31.85 bitrate= 4.6kbits/s dup=0 drop=2 speed=1.57e+03x frame= 106 fps= 26 q=-0.0 size= 3584KiB time=01:31:32.33 bitrate= 5.3kbits/s dup=0 drop=2 speed=1.37e+03x frame= 118 fps= 26 q=-0.0 size= 3840KiB time=01:31:32.82 bitrate= 5.7kbits/s dup=0 drop=2 speed=1.22e+03x frame= 1003 fps= 25 q=-0.0 size= 38656KiB time=01:32:08.82 bitrate= 57.3kbits/s dup=0 drop=7 speed= 136x I'm thinking - being a complete novice - it has something to do with the original stream (as opposed to VAAPI) for only 'ffplay' does play the output file fine. Any other player shows time duration for the output - being under a minute of recording - to be an hour & a half long. Playback does not work unless I move manually towards the end, toward that last minute, then it starts to playback. Any advice much appreciated. many thanks, L.

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V210 to MKV transcoding issue
by Sherbini, Leila 07 Apr '25

07 Apr '25

Hey folks! I’ve been having issues with transcoding v210 mov files into mkv using ffmpeg. Every time I try I get the following error: [in#0/mov,mp4,3gp,3pg2,mj2 @ 0x600000b5cd00] Error during demuxing : Device not configured [[in#0/mov,mp4,3gp,3pg2,mj2 @ 0x600000b5cd00] Error retrieving a packet from demuxer: Device not configured [out#0/matroska @ 0x60000025c780] Error closing file: Bad file descriptor This is issue has been happening on an iMac with an OS of Sequoia 15.3.2 and the same error has occurred with ffmpeg versions 7.1.1 and 6.1.2. On a different iMac running Mojave 10.14.6 OS and ffmpeg version 5.0 the transcode goes through fine. This is the script I’m using: ffmpeg -i input_file -map 0 -dn -c:v ffv1 -level 3 -g 1 -slicecrc 1 -slices 16 -c:a copy output_file.mkv -f framemd5 -an framemd5_output_file Any ideas as to what the issue is and how to fix it? Any insight is appreciated! Best, Leila -- Leila Sherbini | Media Preservation Resident Librarian Michigan State University Libraries sherbini(a)msu.edu she / her / hers What’s this?<https://gscc.msu.edu/education/pronouns.html>

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