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Hello zanny! i just wanna ask, how long fix could take? i really like your hack to get working hevc, rn i'm using h264 and have no problems except low resolution with it, only with hevc i can get smooth and beautiful video, so i hope it doesn't take much time? and have gl with fix! thank you.

Something upstream changed in vaapi fairly recently. I noticed it also broke chromium-vaapi for a while. If I can find the time I'll bisect whatever changed in their patchset to see if I can't find what needs fixing. Till then hardware avc is still working.

Hello. I'm using this obs, everything was fine, until last driver update (mesa). Now I'm getting this error after starting recording with hevc.
info: ---------------------------------
info: [FFMPEG VAAPI encoder: 'recording_h264'] settings: device: /dev/dri/renderD128 codec: hevc_vaapi rate_control: CQP profile: 1 level: 0 qp: 20 bitrate: 0 maxrate: 0 keyint: 120 width: 1920 height: 1080 b-frames: 0
mesa: for the --simplifycfg-sink-common option: may only occur zero or one times!
mesa: for the --global-isel-abort option: may only occur zero or one times!
mesa: for the --amdgpu-atomic-optimizations option: may only occur zero or one
times!
[hevc_vaapi @ 0x562189d67ec0] Driver does not support some wanted packed headers (wanted 0xd, found 0).
info: libfdk_aac encoder created
info: libfdk_aac bitrate: 320, channels: 2
info: ==== Recording Start ===============================================
info: [ffmpeg muxer: 'adv_file_output'] Writing file '/home/njag/2020-07-17 09-30-06.mkv'...
[matroska @ 0x55fe6549b900] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
[matroska @ 0x55fe6549b900] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
Error opening '/home/njag/2020-07-17 09-30-06.mkv': Invalid data found when processing inputCouldn't initialize muxer
qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 5242, resource id: 8388694, major code: 130 (Unknown), minor code: 3
qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 5283, resource id: 8388694, major code: 130 (Unknown), minor code: 3
qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 5286, resource id: 8388694, major code: 130 (Unknown), minor code: 3
qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 5302, resource id: 8388694, major code: 130 (Unknown), minor code: 3
qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 6304, resource id: 8388694, major code: 130 (Unknown), minor code: 3
qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 6345, resource id: 8388694, major code: 130 (Unknown), minor code: 3
qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 6348, resource id: 8388694, major code: 130 (Unknown), minor code: 3
qt.qpa.xcb: QXcbConnection: XCB error: 8 (BadMatch), sequence: 6364, resource id: 8388694, major code: 130 (Unknown), minor code: 3
warning: [ffmpeg muxer: 'adv_file_output'] os_process_pipe_write for info structure failed
info: [ffmpeg muxer: 'adv_file_output'] Output of file '/home/njag/2020-07-17 09-30-06.mkv' stopped
info: Output 'adv_file_output': stopping
info: Output 'adv_file_output': Total frames output: 108
info: Output 'adv_file_output': Total drawn frames: 138 (169 attempted)
info: Output 'adv_file_output': Number of lagged frames due to rendering
lag/stalls: 31 (18.3%)
info: ==== Recording Stop ================================================
info: Video stopped, number of skipped frames due to encoding lag: 77/120 (64.2%)
info: libfdk_aac encoder destroyed

//GPU Polaris 4th Gen.