Please describe your issue in as much detail as possible:
With GPU accel it immediately errors with the message "Unable to retrieve clip information (2)" and these logs:
Oct 31 09:48:19 desktop steam[23057]: Attempting to save a clip to clip_1808500_20251031_094819 from background, timeline_180850020251030_154521[2490432] to timeline_180850020251030_154521[2502431]: 1 timelines, NOT including current, BACKGROUND recording
Oct 31 09:48:19 desktop steam[23057]: BCreateHwDeviceContext Nvidia Hardware CUDA ...
Oct 31 09:48:19 desktop steam[23057]: ... success.
Oct 31 09:48:19 desktop kernel: x86/split lock detection: #DB: av:h264:df0/184928 took a bus_lock trap at address: 0xc94fc622
Oct 31 09:48:19 desktop steam[23057]: libav: Video width 5120 not within range from 48 to 4096
Oct 31 09:48:19 desktop steam[23057]: libav: Video width 5120 not within range from 48 to 4096
Oct 31 09:48:19 desktop steam[23057]: libav: Failed setup for format cuda: hwaccel initialisation returned error.
Oct 31 09:48:19 desktop steam[23057]: libav: Failed setup for format cuda: hwaccel initialisation returned error.
Oct 31 09:48:19 desktop steam[23057]: Failed to get HW surface format
Oct 31 09:48:19 desktop steam[23057]: libav: decode_slice_header error
Oct 31 09:48:19 desktop steam[23057]: libav: decode_slice_header error
Oct 31 09:48:19 desktop steam[23057]: libav: no frame!
Oct 31 09:48:19 desktop steam[23057]: libav: no frame!
Oct 31 09:48:19 desktop kernel: x86/split lock detection: #DB: av:h264:df1/184929 took a bus_lock trap at address: 0xc94fc622
Oct 31 09:48:19 desktop steam[23057]: libav: Video width 5120 not within range from 48 to 4096
Oct 31 09:48:19 desktop steam[23057]: libav: Video width 5120 not within range from 48 to 4096
Oct 31 09:48:19 desktop steam[23057]: libav: Failed setup for format cuda: hwaccel initialisation returned error.
Oct 31 09:48:19 desktop steam[23057]: libav: Failed setup for format cuda: hwaccel initialisation returned error.
Oct 31 09:48:19 desktop steam[23057]: Failed to get HW surface format
Oct 31 09:48:19 desktop steam[23057]: libav: decode_slice_header error
Oct 31 09:48:19 desktop steam[23057]: libav: decode_slice_header error
Oct 31 09:48:19 desktop steam[23057]: libav: no frame!
Oct 31 09:48:19 desktop steam[23057]: libav: no frame!
Oct 31 09:48:19 desktop steam[23057]: Failed to get thumbnail frame from MPD /var/home/jonathan/.var/app/com.valvesoftware.Steam/.local/share/Steam/userdata/524291/gamerecordings/clips/clip_1808500_20251031_094819/video/bg_1808500_20251030_154544/session.mpd
Oct 31 09:48:19 desktop steam[23057]: Clip save failed with Failure
Without GPU accel you have to use the "custom" setting, then it shows a progress bar but at the end displays "Failed to export, try again (2)", and these are the logs (the libav ones repeat):
Oct 31 09:53:29 desktop steam[23057]: Starting export of clip clip_1808500_20251031_095124
Oct 31 09:53:29 desktop steam[23057]: Exporting/previewing from MPD files /var/home/jonathan/.var/app/com.valvesoftware.Steam/.local/share/Steam/userdata/524291/gamerecordings/clips/clip_1808500_20251031_095124/video/bg_1808500_20251031_092116/session.mpd
Oct 31 09:53:29 desktop steam[23057]: [export] Starting for file: /var/home/jonathan/ARC Raiders - 2025-10-31 09-51-23.mp4
Oct 31 09:53:29 desktop kernel: x86/split lock detection: #DB: CJobMgr::m_Work/190720 took a bus_lock trap at address: 0xc9197cd8
Oct 31 09:53:29 desktop kernel: x86/split lock detection: #DB: CJobMgr::m_Work/31718 took a bus_lock trap at address: 0xc9387e53
Oct 31 09:53:29 desktop kernel: x86/split lock detection: #DB: CJobMgr::m_Work/190720 took a bus_lock trap at address: 0xc9197cd8
Oct 31 09:53:29 desktop kernel: x86/split lock detection: #DB: CJobMgr::m_Work/190720 took a bus_lock trap at address: 0xc9197cd8
Oct 31 09:53:29 desktop kernel: x86/split lock detection: #DB: CJobMgr::m_Work/190720 took a bus_lock trap at address: 0xc9197cd8
Oct 31 09:53:29 desktop kernel: x86/split lock detection: #DB: CJobMgr::m_Work/190720 took a bus_lock trap at address: 0xc9197cd8
Oct 31 09:53:29 desktop kernel: x86/split lock detection: #DB: CJobMgr::m_Work/190720 took a bus_lock trap at address: 0xc9197cd8
Oct 31 09:53:29 desktop kernel: x86/split lock detection: #DB: CJobMgr::m_Work/190720 took a bus_lock trap at address: 0xc9197cd8
Oct 31 09:53:29 desktop kernel: x86/split lock detection: #DB: CJobMgr::m_Work/190720 took a bus_lock trap at address: 0xc9197cd8
Oct 31 09:53:29 desktop kernel: x86/split lock detection: #DB: CJobMgr::m_Work/190720 took a bus_lock trap at address: 0xc9197cd8
Oct 31 09:53:29 desktop steam[23057]: [export] [try_hardware=true][codec=1][bitrate=38000][framerate=60][width=3840][height=1080][encoder_hardware=2]
Oct 31 09:53:30 desktop steam[23057]: [export] Processing file: /var/home/jonathan/.var/app/com.valvesoftware.Steam/.local/share/Steam/userdata/524291/gamerecordings/clips/clip_1808500_20251031_095124/video/bg_1808500_20251031_092116/session.mpd
Oct 31 09:53:30 desktop steam[23057]: BCreateHwDeviceContext Nvidia Hardware CUDA ...
Oct 31 09:53:30 desktop steam[23057]: ... success.
Oct 31 09:53:30 desktop steam[23057]: [export] - Decoder: Hardware CUDA - Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, bt709, progressive), 5120x1440, 1771 kb/s
Oct 31 09:53:30 desktop steam[23057]: libav: Video width 5120 not within range from 48 to 4096
Oct 31 09:53:30 desktop steam[23057]: libav: Video width 5120 not within range from 48 to 4096
Oct 31 09:53:30 desktop steam[23057]: libav: Failed setup for format cuda: hwaccel initialisation returned error.
Oct 31 09:53:30 desktop steam[23057]: libav: Failed setup for format cuda: hwaccel initialisation returned error.
Oct 31 09:53:30 desktop steam[23057]: Failed to get HW surface format
Oct 31 09:53:30 desktop steam[23057]: libav: decode_slice_header error
Oct 31 09:53:30 desktop steam[23057]: libav: decode_slice_header error
Oct 31 09:53:30 desktop steam[23057]: libav: no frame!
Oct 31 09:53:30 desktop steam[23057]: libav: no frame!
Your system information
Please describe your issue in as much detail as possible:
With GPU accel it immediately errors with the message "Unable to retrieve clip information (2)" and these logs:
Without GPU accel you have to use the "custom" setting, then it shows a progress bar but at the end displays "Failed to export, try again (2)", and these are the logs (the libav ones repeat):
Steps for reproducing this issue: