[2026-06-01 20:17:21] -d decklink:drift_fix -r embedded -P 50000 --param use-hw-accel,resampler=soxr,decoder-use-codec=R12L
[2026-06-01 20:17:21] UltraGrid 1.10+ (tags/continuous rev 6ff1a8e4 built Jun 1 2026 20:06:56)
[2026-06-01 20:17:21]
[2026-06-01 20:17:21] Display device : decklink
[2026-06-01 20:17:21] Capture device : none
[2026-06-01 20:17:21] Audio capture : none
[2026-06-01 20:17:21] Audio playback : embedded
[2026-06-01 20:17:21] MTU : 9000 B
[2026-06-01 20:17:21] Video compression: none
[2026-06-01 20:17:21] Audio codec : PCM
[2026-06-01 20:17:21] Network protocol : UltraGrid RTP
[2026-06-01 20:17:21] Audio FEC : none
[2026-06-01 20:17:21] Video FEC : none
[2026-06-01 20:17:21]
[2026-06-01 20:17:21] [DeckLink display] Using device UltraStudio 4K Mini
[2026-06-01 20:17:21] [DeckLink display] bmdDeckLinkConfigFieldFlickerRemoval set to: false
[2026-06-01 20:17:21] [DeckLink display] bmdDeckLinkConfigLowLatencyVideoOutput set to: true
[2026-06-01 20:17:21] [DeckLink display] Using audio output: embedeed
[2026-06-01 20:17:21] [DeckLink display] Video Colorspace: unknown
[2026-06-01 20:17:21] [DeckLink display] Video Dynamic Range: SDR
[2026-06-01 20:17:21] Audio receiving started.
[2026-06-01 20:17:21] Control socket listening on port 34143
[2026-06-01 20:17:21] [key control] Stdin is not a TTY - disabling keyboard control.
[2026-06-01 20:17:21] [video dec.] New incoming video format detected: 3840x2160 @24.00p, codec H.264
[2026-06-01 20:17:21] [lavd] Setting thread count to 0, type: slice
[2026-06-01 20:17:21] [lavd] Using decoder: h264
[2026-06-01 20:17:21] [lavd] Got H264 non-IDR, waiting for first IDR NALU...
[2026-06-01 20:17:21] New incoming audio format detected: 48000 Hz, 8 channels, 32 bits per sample, codec Opus
[2026-06-01 20:17:21] [lavcd aud.] Using audio decoder: opus
[2026-06-01 20:17:21] [lavcd aud.] Using audio decoder: opus
[2026-06-01 20:17:21] [lavcd aud.] Using audio decoder: opus
[2026-06-01 20:17:21] [lavcd aud.] Using audio decoder: opus
[2026-06-01 20:17:21] [lavcd aud.] Using audio decoder: opus
[2026-06-01 20:17:21] [lavcd aud.] Using audio decoder: opus
[2026-06-01 20:17:21] [lavcd aud.] Using audio decoder: opus
[2026-06-01 20:17:21] [lavcd aud.] Using audio decoder: opus
[2026-06-01 20:17:21] Audio reconfiguration succeeded (8 channels, 4 Bps, 48000 Hz, codec: PCM).
[2026-06-01 20:17:21] [lavd] Got H264 non-IDR, waiting for first IDR NALU...
[2026-06-01 20:17:21] [lavd] Got H264 non-IDR, waiting for first IDR NALU...
[2026-06-01 20:17:21] [lavd] Got H264 non-IDR, waiting for first IDR NALU...
[2026-06-01 20:17:21] [lavd] Got H264 non-IDR, waiting for first IDR NALU...
[2026-06-01 20:17:21] [lavd] Got H264 non-IDR, waiting for first IDR NALU...
[2026-06-01 20:17:21] [lavd] Got H264 non-IDR, waiting for first IDR NALU...
[2026-06-01 20:17:21] [lavd] Got H264 non-IDR, waiting for first IDR NALU...
[2026-06-01 20:17:21] [lavd] Got H264 non-IDR, waiting for first IDR NALU...
[2026-06-01 20:17:21] [lavd] Got H264 non-IDR, waiting for first IDR NALU...
[2026-06-01 20:17:21] [lavd] Got H264 non-IDR, waiting for first IDR NALU...
[2026-06-01 20:17:21] [lavd] Got H264 non-IDR, waiting for first IDR NALU...
[2026-06-01 20:17:21] [lavd] Got H264 non-IDR, waiting for first IDR NALU...
[2026-06-01 20:17:21] [lavd] Got H264 non-IDR, waiting for first IDR NALU...
[2026-06-01 20:17:21] [lavd] Got H264 non-IDR, waiting for first IDR NALU...
[2026-06-01 20:17:21] [Pbuf] [audio] 128/128 packets received (100.0000%), 0 lost, max loss 0
[2026-06-01 20:17:21] [lavd] Got H264 non-IDR, waiting for first IDR NALU...
[2026-06-01 20:17:21] [lavd] HW acceleration requested but incoming video has 10 bit depth (yuv444p10le), which is more than universally supported 8b.
[2026-06-01 20:17:21] [lavd] Hw. acceleration requested but incoming video has not 4:2:0 subsampling (format is yuv444p10le), which is usually not supported by hw. accelerators
[2026-06-01 20:17:21] [lavd] Selected pixel format: vulkan
[2026-06-01 20:17:21] [lavc h264 @ 0x7b5310005740] Device does not support the VK_KHR_video_decode_queue extension!
[2026-06-01 20:17:21] [lavc h264 @ 0x7b5310005740] Failed setup for format vulkan: hwaccel initialisation returned error.
[2026-06-01 20:17:21] [lavd] HW acceleration requested but incoming video has 10 bit depth (yuv444p10le), which is more than universally supported 8b.
[2026-06-01 20:17:21] [lavd] Hw. acceleration requested but incoming video has not 4:2:0 subsampling (format is yuv444p10le), which is usually not supported by hw. accelerators
[2026-06-01 20:17:21] [lavc CUDA @ 0x7b52ec1004c0] Cannot load libcuda.so.1
[2026-06-01 20:17:21] [lavc CUDA @ 0x7b52ec1004c0] Could not dynamically load CUDA
[2026-06-01 20:17:21] [lavc CUDA @ 0x7b52ec122180] Cannot load libcuda.so.1
[2026-06-01 20:17:21] [lavc CUDA @ 0x7b52ec122180] Could not dynamically load CUDA
[2026-06-01 20:17:21] [hw accel] Unable to create hwdevice!!
[2026-06-01 20:17:21] [lavd] Falling back to software decoding!
[2026-06-01 20:17:21] [video dec.] Detected compression properties: YCbCr 4:4:4 10 bit
[2026-06-01 20:17:21] [video dec.] Detected compression properties: YCbCr 4:4:4 10 bit
[2026-06-01 20:17:21] [video dec.] Detected compression properties: YCbCr 4:4:4 10 bit
[2026-06-01 20:17:22] [DeckLink display] Selected mode: 2160p24
[2026-06-01 20:17:22] [DeckLink display] bmdDeckLinkConfig444SDIVideoOutput set to: true
[2026-06-01 20:17:22] [DeckLink display] bmdDeckLinkConfigSDIOutputLinkConfiguration set to: bmdLinkConfigurationSingleLink
[2026-06-01 20:17:22] [display] Successfully reconfigured display to 3840x2160 @24.00p, codec R12L
[2026-06-01 20:17:22] [lavd] Setting thread count to 0, type: slice
[2026-06-01 20:17:22] [lavd] Using decoder: h264
[2026-06-01 20:17:22] [lavd] Got H264 non-IDR, waiting for first IDR NALU...
[2026-06-01 20:17:22] [DeckLink display] audio buffer underflow!
[2026-06-01 20:17:22] uv: src/messaging.cpp:345: void free_message(message*, response*): Assertion `msg->magic == MSG_MAGIC' failed.
[2026-06-01 20:17:22] Backtrace:
[2026-06-01 20:17:22] uv(+0x534bb) [0x5bab372f64bb]
[2026-06-01 20:17:22] /usr/lib/x86_64-linux-gnu/libc.so.6(+0x45cb0) [0x7b5329245cb0]
[2026-06-01 20:17:22] /usr/lib/x86_64-linux-gnu/libc.so.6(pthread_kill+0x11c) [0x7b53292a648c]
[2026-06-01 20:17:22] /usr/lib/x86_64-linux-gnu/libc.so.6(gsignal+0x1e) [0x7b5329245b7e]
[2026-06-01 20:17:22] /usr/lib/x86_64-linux-gnu/libc.so.6(abort+0x27) [0x7b53292288ec]
[2026-06-01 20:17:22] /usr/lib/x86_64-linux-gnu/libc.so.6(+0x29979) [0x7b5329229979]
[2026-06-01 20:17:47] /usr/lib/x86_64-linux-gnu/libc.so.6(__assert_fail+0xb5) [0x73d20e83bf75]
[2026-06-01 20:17:47] uv(+0x28192) [0x63d826063192]
[2026-06-01 20:17:47] uv(+0x71bff) [0x63d8260acbff]
[2026-06-01 20:17:47] uv(+0x65838) [0x63d8260a0838]
[2026-06-01 20:17:47] uv(+0x1dc399) [0x63d826217399]
[2026-06-01 20:17:47] uv(+0x1d530c) [0x63d82621030c]
[2026-06-01 20:17:47] uv(+0x8ea89) [0x63d8260c9a89]
[2026-06-01 20:17:47] /usr/lib/x86_64-linux-gnu/libc.so.6(+0xa40da) [0x73d20e8a40da]
[2026-06-01 20:17:47] /usr/lib/x86_64-linux-gnu/libc.so.6(+0x1377ac) [0x73d20e9377ac]
[2026-06-01 20:17:47] [lavd] Got H264 non-IDR, waiting for first IDR NALU...
[2026-06-01 20:17:47] [lavd] Got H264 non-IDR, waiting for first IDR NALU...
[2026-06-01 20:17:47]
[2026-06-01 20:17:47] Backtrace symbolic:
[2026-06-01 20:17:47] 0: print_stacktrace_glibc at src/host.cpp:1375 [pc=0x109780002202811]
[2026-06-01 20:17:47] print_backtrace at src/host.cpp:1418 [pc=0x109780002202811]
[2026-06-01 20:17:47] crash_signal_handler at src/host.cpp:1452 [pc=0x109780002202811]
[2026-06-01 20:17:47] 1: ?? at ??:0 [pc=0x127346023881904]
[2026-06-01 20:17:47] 2: ?? at ??:0 [pc=0x127346024277132]
[2026-06-01 20:17:47] 3: ?? at ??:0 [pc=0x127346023881598]
[2026-06-01 20:17:47] 4: ?? at ??:0 [pc=0x127346023762156]
[2026-06-01 20:17:47] 5: ?? at ??:0 [pc=0x127346023766393]
[2026-06-01 20:17:47] 6: ?? at ??:0 [pc=0x127346023841653]
[2026-06-01 20:17:47] 7: _ZNSt5mutex4lockEv at /usr/include/c++/15/bits/std_mutex.h:119 [pc=0x109780002025874]
[2026-06-01 20:17:47] _ZNSt11unique_lockISt5mutexE4lockEv at /usr/include/c++/15/bits/unique_lock.h:144 [pc=0x109780002025874]
[2026-06-01 20:17:47] _ZNSt11unique_lockISt5mutexEC4ERS0_ at /usr/include/c++/15/bits/unique_lock.h:75 [pc=0x109780002025874]
[2026-06-01 20:17:47] receive_response_real at src/messaging.cpp:86 [pc=0x109780002025874]
[2026-06-01 20:17:47] receive_response at src/messaging.cpp:83 [pc=0x109780002025874]
[2026-06-01 20:17:47] 8: audio_decoder_process_message at src/rtp/audio_decoders.cpp:223 [pc=0x109780002327551]
[2026-06-01 20:17:47] 9: send_message_common at src/messaging.cpp:237 [pc=0x109780002277432]
[2026-06-01 20:17:47] 10: _ZN15AudioDriftFixer6updateEjjj at src/video_display/decklink_drift_fix.hpp:451 [pc=0x109780003812249]
[2026-06-01 20:17:47] 11: display_decklink_put_audio_frame at src/video_display/decklink.cpp:1795 [pc=0x109780003783436]
[2026-06-01 20:17:47] 12: audio_receiver_thread at src/audio/audio.cpp:832 [pc=0x109780002445961]
[2026-06-01 20:17:47] 13: ?? at ??:0 [pc=0x127346024267994]
[2026-06-01 20:17:47] 14: ?? at ??:0 [pc=0x127346024871852]
[2026-06-01 20:17:47]
[2026-06-01 20:17:47] UltraGrid has crashed (ABRT - Aborted).
[2026-06-01 20:17:47]
[2026-06-01 20:17:47] Please send a bug report to address ultragrid-dev@cesnet.cz.
[2026-06-01 20:17:47] You may find some tips how to report bugs in file doc/REPORTING_BUGS.md distributed with UltraGrid
[2026-06-01 20:17:47] (or available online at https://github.com/CESNET/UltraGrid/blob/master/doc/REPORTING-BUGS.md).
Ubuntu 26.04 Server