ffmpeg -vaapi_device /dev/dri/renderD128 -loglevel debug -hwaccel vaapi -hwaccel_output_format vaapi -i sample.mkv -c:v hevc_vaapi -crf 28 -qp 25 -profile:v main -tier high -level 51 -c:a copy -map 0 output.mp4
ffmpeg version N-98443-gf9277cd Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 7 (SUSE Linux)
  configuration: --prefix=/home/build/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/home/build/ffmpeg_build/include --extra-ldflags=-L/home/build/ffmpeg_build/lib --extra-ldflags=-L/home/build/ffmpeg_build/lib64 --extra-libs=-lpthread --extra-libs=-lm --bindir=/home/build/bin --enable-gpl --enable-vaapi --enable-libfdk_aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libx264 --enable-libx265 --enable-nonfree --enable-static
  libavutil      56. 55.100 / 56. 55.100
  libavcodec     58. 94.100 / 58. 94.100
  libavformat    58. 48.100 / 58. 48.100
  libavdevice    58. 11.101 / 58. 11.101
  libavfilter     7. 87.100 /  7. 87.100
  libswscale      5.  8.100 /  5.  8.100
  libswresample   3.  8.100 /  3.  8.100
  libpostproc    55.  8.100 / 55.  8.100
Splitting the commandline.
Reading option '-vaapi_device' ... matched as option 'vaapi_device' (set VAAPI hardware device (DRM path or X11 display name)) with argument '/dev/dri/renderD128'.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'debug'.
Reading option '-hwaccel' ... matched as option 'hwaccel' (use HW accelerated decoding) with argument 'vaapi'.
Reading option '-hwaccel_output_format' ... matched as option 'hwaccel_output_format' (select output format used with HW accelerated decoding) with argument 'vaapi'.
Reading option '-i' ... matched as input url with argument 'sample.mkv'.
Reading option '-c:v' ... matched as option 'c' (codec name) with argument 'hevc_vaapi'.
Reading option '-crf' ... matched as AVOption 'crf' with argument '28'.
Reading option '-qp' ... matched as AVOption 'qp' with argument '25'.
Reading option '-profile:v' ... matched as option 'profile' (set profile) with argument 'main'.
Reading option '-tier' ... matched as AVOption 'tier' with argument 'high'.
Reading option '-level' ... matched as AVOption 'level' with argument '51'.
Reading option '-c:a' ... matched as option 'c' (codec name) with argument 'copy'.
Reading option '-map' ... matched as option 'map' (set input stream mapping) with argument '0'.
Reading option 'output.mp4' ... matched as output url.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option vaapi_device (set VAAPI hardware device (DRM path or X11 display name)) with argument /dev/dri/renderD128.
[AVHWDeviceContext @ 0x37c5500] libva: VA-API version 1.5.0
[AVHWDeviceContext @ 0x37c5500] libva: va_getDriverName() returns 0
[AVHWDeviceContext @ 0x37c5500] libva: Trying to open /usr/lib64/dri/radeonsi_drv_video.so
[AVHWDeviceContext @ 0x37c5500] libva: Found init function __vaDriverInit_1_5
[AVHWDeviceContext @ 0x37c5500] libva: va_openDriver() returns 0
[AVHWDeviceContext @ 0x37c5500] Initialised VAAPI connection: version 1.5
[AVHWDeviceContext @ 0x37c5500] Format 0x3231564e -> nv12.
[AVHWDeviceContext @ 0x37c5500] Format 0x30313050 -> p010le.
[AVHWDeviceContext @ 0x37c5500] Format 0x36313050 -> unknown.
[AVHWDeviceContext @ 0x37c5500] Format 0x30323449 -> yuv420p.
[AVHWDeviceContext @ 0x37c5500] Format 0x32315659 -> yuv420p.
[AVHWDeviceContext @ 0x37c5500] Format 0x56595559 -> unknown.
[AVHWDeviceContext @ 0x37c5500] Format 0x32595559 -> yuyv422.
[AVHWDeviceContext @ 0x37c5500] Format 0x59565955 -> uyvy422.
[AVHWDeviceContext @ 0x37c5500] Format 0x41524742 -> bgra.
[AVHWDeviceContext @ 0x37c5500] Format 0x41424752 -> rgba.
[AVHWDeviceContext @ 0x37c5500] Format 0x58524742 -> bgr0.
[AVHWDeviceContext @ 0x37c5500] Format 0x58424752 -> rgb0.
[AVHWDeviceContext @ 0x37c5500] VAAPI driver: Mesa Gallium driver 20.2.0-devel for AMD RAVEN (DRM 3.33.0, 5.3.18-lp152.20.7-default, LLVM 10.0.0).
[AVHWDeviceContext @ 0x37c5500] Driver not found in known nonstandard list, using standard behaviour.
Applying option loglevel (set logging level) with argument debug.
Successfully parsed a group of options.
Parsing a group of options: input url sample.mkv.
Applying option hwaccel (use HW accelerated decoding) with argument vaapi.
Applying option hwaccel_output_format (select output format used with HW accelerated decoding) with argument vaapi.
Successfully parsed a group of options.
Opening an input file: sample.mkv.
[NULL @ 0x397cfc0] Opening 'sample.mkv' for reading
[file @ 0x397fd00] Setting default whitelist 'file,crypto,data'
[matroska,webm @ 0x397cfc0] Format matroska,webm probed with size=2048 and score=100
st:0 removing common factor 1000000 from timebase
st:1 removing common factor 1000000 from timebase
[matroska,webm @ 0x397cfc0] Before avformat_find_stream_info() pos: 5527 bytes read:33553 seeks:2 nb_streams:2
[h264 @ 0x39aa380] nal_unit_type: 7(SPS), nal_ref_idc: 3
[h264 @ 0x39aa380] nal_unit_type: 8(PPS), nal_ref_idc: 3
[h264 @ 0x39aa380] nal_unit_type: 7(SPS), nal_ref_idc: 3
[h264 @ 0x39aa380] nal_unit_type: 8(PPS), nal_ref_idc: 3
[h264 @ 0x39aa380] nal_unit_type: 7(SPS), nal_ref_idc: 3
[h264 @ 0x39aa380] nal_unit_type: 8(PPS), nal_ref_idc: 3
[h264 @ 0x39aa380] nal_unit_type: 6(SEI), nal_ref_idc: 0
[h264 @ 0x39aa380] nal_unit_type: 5(IDR), nal_ref_idc: 3
[h264 @ 0x39aa380] Format yuv420p chosen by get_format().
[h264 @ 0x39aa380] Reinit context to 1280x720, pix_fmt: yuv420p
[h264 @ 0x39aa380] no picture
[matroska,webm @ 0x397cfc0] All info found
[matroska,webm @ 0x397cfc0] After avformat_find_stream_info() pos: 78142 bytes read:131857 seeks:2 frames:11
Input #0, matroska,webm, from 'sample.mkv':
  Metadata:
    encoder         : libebml v1.3.9 + libmatroska v1.5.2
    creation_time   : 2020-06-26T20:51:30.000000Z
  Duration: 00:40:36.26, start: 0.000000, bitrate: 2292 kb/s
    Stream #0:0, 4, 1/1000: Video: h264 (High), 1 reference frame, yuv420p(progressive, left), 1280x720 [SAR 1:1 DAR 16:9], 0/1, 25 fps, 25 tbr, 1k tbn, 2k tbc (default)
    Metadata:
      BPS-eng         : 1907214
      DURATION-eng    : 00:40:36.120000000
      NUMBER_OF_FRAMES-eng: 60903
      NUMBER_OF_BYTES-eng: 580775405
      _STATISTICS_WRITING_APP-eng: mkvmerge v38.0.0 ('The Silent Type') 64-bit
      _STATISTICS_WRITING_DATE_UTC-eng: 2020-06-26 20:51:30
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    Stream #0:1, 7, 1/1000: Audio: ac3, 48000 Hz, 5.1(side), fltp, 384 kb/s (default)
    Metadata:
      BPS-eng         : 384000
      DURATION-eng    : 00:40:36.256000000
      NUMBER_OF_FRAMES-eng: 76133
      NUMBER_OF_BYTES-eng: 116940288
      _STATISTICS_WRITING_APP-eng: mkvmerge v38.0.0 ('The Silent Type') 64-bit
      _STATISTICS_WRITING_DATE_UTC-eng: 2020-06-26 20:51:30
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
Successfully opened the file.
Parsing a group of options: output url output.mp4.
Applying option c:v (codec name) with argument hevc_vaapi.
Applying option profile:v (set profile) with argument main.
Applying option c:a (codec name) with argument copy.
Applying option map (set input stream mapping) with argument 0.
Successfully parsed a group of options.
Opening an output file: output.mp4.
[file @ 0x38c4180] Setting default whitelist 'file,crypto,data'
Successfully opened the file.
detected 8 logical cores
[h264 @ 0x38f7e40] nal_unit_type: 7(SPS), nal_ref_idc: 3
[h264 @ 0x38f7e40] nal_unit_type: 8(PPS), nal_ref_idc: 3
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> hevc (hevc_vaapi))
  Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
    Last message repeated 2 times
[h264 @ 0x38f7e40] nal_unit_type: 7(SPS), nal_ref_idc: 3
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
    Last message repeated 5 times
[h264 @ 0x38f7e40] nal_unit_type: 8(PPS), nal_ref_idc: 3
[h264 @ 0x38f7e40] nal_unit_type: 6(SEI), nal_ref_idc: 0
[h264 @ 0x38f7e40] nal_unit_type: 5(IDR), nal_ref_idc: 3
[h264 @ 0x38f7e40] Format vaapi_vld chosen by get_format().
[h264 @ 0x38f7e40] Format vaapi_vld requires hwaccel initialisation.
[h264 @ 0x38f7e40] Considering format 0x3231564e -> nv12.
[h264 @ 0x38f7e40] Picked nv12 (0x3231564e) as best match for yuv420p.
[AVHWFramesContext @ 0x3952180] Created surface 0x1.
[AVHWFramesContext @ 0x3952180] Direct mapping disabled: deriving image does not work: 1 (operation failed).
[AVHWFramesContext @ 0x3952180] Created surface 0x2.
[AVHWFramesContext @ 0x3952180] Created surface 0x3.
[AVHWFramesContext @ 0x3952180] Created surface 0x4.
[AVHWFramesContext @ 0x3952180] Created surface 0x5.
[AVHWFramesContext @ 0x3952180] Created surface 0x6.
[AVHWFramesContext @ 0x3952180] Created surface 0x7.
[AVHWFramesContext @ 0x3952180] Created surface 0x8.
[AVHWFramesContext @ 0x3952180] Created surface 0x9.
[AVHWFramesContext @ 0x3952180] Created surface 0xa.
[AVHWFramesContext @ 0x3952180] Created surface 0xb.
[AVHWFramesContext @ 0x3952180] Created surface 0xc.
[AVHWFramesContext @ 0x3952180] Created surface 0xd.
[AVHWFramesContext @ 0x3952180] Created surface 0xe.
[AVHWFramesContext @ 0x3952180] Created surface 0xf.
[AVHWFramesContext @ 0x3952180] Created surface 0x10.
[AVHWFramesContext @ 0x3952180] Created surface 0x11.
[AVHWFramesContext @ 0x3952180] Created surface 0x12.
[AVHWFramesContext @ 0x3952180] Created surface 0x13.
[AVHWFramesContext @ 0x3952180] Created surface 0x14.
[AVHWFramesContext @ 0x3952180] Created surface 0x15.
[AVHWFramesContext @ 0x3952180] Created surface 0x16.
[AVHWFramesContext @ 0x3952180] Created surface 0x17.
[AVHWFramesContext @ 0x3952180] Created surface 0x18.
[AVHWFramesContext @ 0x3952180] Created surface 0x19.
[AVHWFramesContext @ 0x3952180] Created surface 0x1a.
[AVHWFramesContext @ 0x3952180] Created surface 0x1b.
[AVHWFramesContext @ 0x3952180] Created surface 0x1c.
[AVHWFramesContext @ 0x3952180] Created surface 0x1d.
[h264 @ 0x38f7e40] Considering format 0x3231564e -> nv12.
[h264 @ 0x38f7e40] Picked nv12 (0x3231564e) as best match for yuv420p.
[h264 @ 0x38f7e40] Decode context initialised: 0x1e/0x1f.
[h264 @ 0x38f7e40] Reinit context to 1280x720, pix_fmt: vaapi_vld
[h264 @ 0x38f7e40] no picture
[h264 @ 0x38f7e40] Param buffer (type 0, 672 bytes) is 0x20.
[h264 @ 0x38f7e40] Param buffer (type 1, 240 bytes) is 0x21.
[h264 @ 0x38f7e40] Slice 0 param buffer (3128 bytes) is 0x22.
[h264 @ 0x38f7e40] Slice 0 data buffer (35272 bytes) is 0x23.
[h264 @ 0x38f7e40] Decode to surface 0x1d.
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
[h264 @ 0x3a3e600] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 2
[h264 @ 0x3a3e600] no picture
[h264 @ 0x3a3e600] Param buffer (type 0, 672 bytes) is 0x20.
[h264 @ 0x3a3e600] Param buffer (type 1, 240 bytes) is 0x21.
[h264 @ 0x3a3e600] Slice 0 param buffer (3128 bytes) is 0x22.
[h264 @ 0x3a3e600] Slice 0 data buffer (15477 bytes) is 0x23.
[h264 @ 0x3a3e600] Decode to surface 0x1c.
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
[h264 @ 0x3a35d80] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 2
[h264 @ 0x3a35d80] Param buffer (type 0, 672 bytes) is 0x20.
[h264 @ 0x3a35d80] Param buffer (type 1, 240 bytes) is 0x21.
[h264 @ 0x3a35d80] Slice 0 param buffer (3128 bytes) is 0x22.
[h264 @ 0x3a35d80] Slice 0 data buffer (5526 bytes) is 0x23.
[h264 @ 0x3a35d80] Decode to surface 0x1b.
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
[h264 @ 0x3a8b200] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 0
[h264 @ 0x3a8b200] Param buffer (type 0, 672 bytes) is 0x20.
[h264 @ 0x3a8b200] Param buffer (type 1, 240 bytes) is 0x21.
[h264 @ 0x3a8b200] Slice 0 param buffer (3128 bytes) is 0x22.
[h264 @ 0x3a8b200] Slice 0 data buffer (3261 bytes) is 0x23.
[h264 @ 0x3a8b200] Decode to surface 0x1a.
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
    Last message repeated 8 times
[h264 @ 0x3a8fac0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 0
[h264 @ 0x3a8fac0] Param buffer (type 0, 672 bytes) is 0x20.
[h264 @ 0x3a8fac0] Param buffer (type 1, 240 bytes) is 0x21.
[h264 @ 0x3a8fac0] Slice 0 param buffer (3128 bytes) is 0x22.
[h264 @ 0x3a8fac0] Slice 0 data buffer (4040 bytes) is 0x23.
[h264 @ 0x3a8fac0] Decode to surface 0x19.
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
[h264 @ 0x3a4f500] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 2
[h264 @ 0x3a4f500] Param buffer (type 0, 672 bytes) is 0x20.
[h264 @ 0x3a4f500] Param buffer (type 1, 240 bytes) is 0x21.
[h264 @ 0x3a4f500] Slice 0 param buffer (3128 bytes) is 0x22.
[h264 @ 0x3a4f500] Slice 0 data buffer (16647 bytes) is 0x23.
[h264 @ 0x3a4f500] Decode to surface 0x18.
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
[h264 @ 0x3a753c0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 2
[h264 @ 0x3a753c0] Param buffer (type 0, 672 bytes) is 0x20.
[h264 @ 0x3a753c0] Param buffer (type 1, 240 bytes) is 0x21.
[h264 @ 0x3a753c0] Slice 0 param buffer (3128 bytes) is 0x22.
[h264 @ 0x3a753c0] Slice 0 data buffer (6088 bytes) is 0x23.
[h264 @ 0x3a753c0] Decode to surface 0x17.
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
[h264 @ 0x3a42180] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 0
[h264 @ 0x3a42180] Param buffer (type 0, 672 bytes) is 0x20.
[h264 @ 0x3a42180] Param buffer (type 1, 240 bytes) is 0x21.
[h264 @ 0x3a42180] Slice 0 param buffer (3128 bytes) is 0x22.
[h264 @ 0x3a42180] Slice 0 data buffer (3612 bytes) is 0x23.
[h264 @ 0x3a42180] Decode to surface 0x16.
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
[h264 @ 0x3a690c0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 0
[h264 @ 0x3a690c0] Param buffer (type 0, 672 bytes) is 0x20.
[h264 @ 0x3a690c0] Param buffer (type 1, 240 bytes) is 0x21.
[h264 @ 0x3a690c0] Slice 0 param buffer (3128 bytes) is 0x22.
[h264 @ 0x3a690c0] Slice 0 data buffer (3548 bytes) is 0x23.
[h264 @ 0x3a690c0] Decode to surface 0x15.
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
[h264 @ 0x38f7e40] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 2
[h264 @ 0x38f7e40] Param buffer (type 0, 672 bytes) is 0x20.
[h264 @ 0x38f7e40] Param buffer (type 1, 240 bytes) is 0x21.
[h264 @ 0x38f7e40] Slice 0 param buffer (3128 bytes) is 0x22.
[h264 @ 0x38f7e40] Slice 0 data buffer (17003 bytes) is 0x23.
[h264 @ 0x38f7e40] Decode to surface 0x14.
[graph 0 input from stream 0:0 @ 0x3b3ea00] Setting 'video_size' to value '1280x720'
[graph 0 input from stream 0:0 @ 0x3b3ea00] Setting 'pix_fmt' to value '46'
[graph 0 input from stream 0:0 @ 0x3b3ea00] Setting 'time_base' to value '1/1000'
[graph 0 input from stream 0:0 @ 0x3b3ea00] Setting 'pixel_aspect' to value '1/1'
[graph 0 input from stream 0:0 @ 0x3b3ea00] Setting 'frame_rate' to value '25/1'
[graph 0 input from stream 0:0 @ 0x3b3ea00] w:1280 h:720 pixfmt:vaapi_vld tb:1/1000 fr:25/1 sar:1/1
[format @ 0x3b3e900] Setting 'pix_fmts' to value 'vaapi_vld'
[AVFilterGraph @ 0x3b3da80] query_formats: 4 queried, 3 merged, 0 already done, 0 delayed
[hevc_vaapi @ 0x3a3abc0] Using input frames context (format vaapi_vld) with hevc_vaapi encoder.
[hevc_vaapi @ 0x3a3abc0] Input surface format is nv12.
[hevc_vaapi @ 0x3a3abc0] Using VAAPI profile VAProfileHEVCMain (17).
[hevc_vaapi @ 0x3a3abc0] Using VAAPI entrypoint VAEntrypointEncSlice (6).
[hevc_vaapi @ 0x3a3abc0] Using VAAPI render target format YUV420 (0x1).
[hevc_vaapi @ 0x3a3abc0] Driver supports RC modes CQP, CBR, VBR.
[hevc_vaapi @ 0x3a3abc0] RC mode: CQP.
[hevc_vaapi @ 0x3a3abc0] RC quality: 25.
[hevc_vaapi @ 0x3a3abc0] RC framerate: 25/1 (25.00 fps).
[hevc_vaapi @ 0x3a3abc0] Using intra and P-frames (supported references: 1 / 0).
[hevc_vaapi @ 0x3a3abc0] Driver does not support some wanted packed headers (wanted 0xd, found 0).
[hevc_vaapi @ 0x3a3abc0] Driver does not support packed sequence headers, but a global header is requested.
[hevc_vaapi @ 0x3a3abc0] No global header will be written: this may result in a stream which is not usable for some purposes (e.g. not muxable to some containers).
[hevc_vaapi @ 0x3a3abc0] Using nv12 as format of reconstructed frames.
[h264 @ 0x3a3e600] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 2
[AVHWFramesContext @ 0x3a2a280] Created surface 0x21.
[h264 @ 0x3a3e600] Param buffer (type 0, 672 bytes) is 0x22.
[h264 @ 0x3a3e600] Param buffer (type 1, 240 bytes) is 0x23.
[AVHWFramesContext @ 0x3a2a280] Direct mapping disabled: deriving image does not work: 1 (operation failed).
[h264 @ 0x3a3e600] Slice 0 param buffer (3128 bytes) is 0x24.
[h264 @ 0x3a3e600] Slice 0 data buffer (5674 bytes) is 0x26.
[h264 @ 0x3a3e600] Decode to surface 0x13.
[hevc_vaapi @ 0x3a3abc0] Using fixed QP = 25 / 25 / 30 for IDR- / P- / B-frames.
[mp4 @ 0x38cafc0] track 1: codec frame size is not set
Output #0, mp4, to 'output.mp4':
  Metadata:
    encoder         : Lavf58.48.100
    Stream #0:0, 0, 1/12800: Video: hevc (hevc_vaapi) (Main), 1 reference frame (hev1 / 0x31766568), vaapi_vld(left), 1280x720 [SAR 1:1 DAR 16:9], 0/1, q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
    Metadata:
      BPS-eng         : 1907214
      DURATION-eng    : 00:40:36.120000000
      NUMBER_OF_FRAMES-eng: 60903
      NUMBER_OF_BYTES-eng: 580775405
      _STATISTICS_WRITING_APP-eng: mkvmerge v38.0.0 ('The Silent Type') 64-bit
      _STATISTICS_WRITING_DATE_UTC-eng: 2020-06-26 20:51:30
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
      encoder         : Lavc58.94.100 hevc_vaapi
    Stream #0:1, 0, 1/48000: Audio: ac3 (ac-3 / 0x332D6361), 48000 Hz, 5.1(side), fltp, 384 kb/s (default)
    Metadata:
      BPS-eng         : 384000
      DURATION-eng    : 00:40:36.256000000
      NUMBER_OF_FRAMES-eng: 76133
      NUMBER_OF_BYTES-eng: 116940288
      _STATISTICS_WRITING_APP-eng: mkvmerge v38.0.0 ('The Silent Type') 64-bit
      _STATISTICS_WRITING_DATE_UTC-eng: 2020-06-26 20:51:30
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
Clipping frame in rate conversion by 0.000008
[hevc_vaapi @ 0x3a3abc0] Input frame: 1280x720 (0).
[hevc_vaapi @ 0x3a3abc0] Pick forced IDR-picture to encode next.
[hevc_vaapi @ 0x3a3abc0] Issuing encode for pic 0/0 as type IDR.
[hevc_vaapi @ 0x3a3abc0] No reference pictures.
[hevc_vaapi @ 0x3a3abc0] Input surface is 0x1d.
[hevc_vaapi @ 0x3a3abc0] Recon surface is 0x21.
[hevc_vaapi @ 0x3a3abc0] Allocated output buffer 0x22
[hevc_vaapi @ 0x3a3abc0] Output buffer is 0x22.
[hevc_vaapi @ 0x3a3abc0] Param buffer (22) is 0x23.
[hevc_vaapi @ 0x3a3abc0] Param buffer (27) is 0x24.
[hevc_vaapi @ 0x3a3abc0] Param buffer (23) is 0x26.
[hevc_vaapi @ 0x3a3abc0] Slice 0: 0-22 (23 rows), 0-919 (920 blocks).
[hevc_vaapi @ 0x3a3abc0] Param buffer (24) is 0x27.
[hevc_vaapi @ 0x3a3abc0] Sync to pic 0/0 (input surface 0x1d).
[hevc_vaapi @ 0x3a3abc0] Output buffer: 17208 bytes (status babababa).
[hevc_vaapi @ 0x3a3abc0] Output read for pic 0/0.
[hevc_vaapi @ 0x3a3abc0] Output packet: pts 0 dts 0.
[h264 @ 0x3a35d80] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 0
[hevc_vaapi @ 0x3a3abc0] Input frame: 1280x720 (1).
[hevc_vaapi @ 0x3a3abc0] Pick normal P-picture to encode next.
[hevc_vaapi @ 0x3a3abc0] Issuing encode for pic 1/1 as type P.
[hevc_vaapi @ 0x3a3abc0] Refers to: 0/0.
[hevc_vaapi @ 0x3a3abc0] Input surface is 0x1a.
[AVHWFramesContext @ 0x3a2a280] Created surface 0x23.
[h264 @ 0x3a35d80] Param buffer (type 0, 672 bytes) is 0x24.
[h264 @ 0x3a35d80] Param buffer (type 1, 240 bytes) is 0x26.
[h264 @ 0x3a35d80] Slice 0 param buffer (3128 bytes) is 0x27.
[hevc_vaapi @ 0x3a3abc0] Recon surface is 0x23.
[hevc_vaapi @ 0x3a3abc0] Output buffer is 0x22.
[h264 @ 0x3a35d80] Slice 0 data buffer (4027 bytes) is 0x28.
[h264 @ 0x3a35d80] Decode to surface 0x12.
[hevc_vaapi @ 0x3a3abc0] Param buffer (23) is 0x29.
[hevc_vaapi @ 0x3a3abc0] Slice 0: 0-22 (23 rows), 0-919 (920 blocks).
[hevc_vaapi @ 0x3a3abc0] RPS for POC 1: (0,1)
[hevc_vaapi @ 0x3a3abc0] Param buffer (24) is 0x24.
[hevc_vaapi @ 0x3a3abc0] Sync to pic 1/1 (input surface 0x1a).
[hevc_vaapi @ 0x3a3abc0] Output buffer: 4576 bytes (status babababa).
[hevc_vaapi @ 0x3a3abc0] Output read for pic 1/1.
[hevc_vaapi @ 0x3a3abc0] Output packet: pts 1 dts 1.
[h264 @ 0x3a8b200] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 0
[hevc_vaapi @ 0x3a3abc0] Input frame: 1280x720 (2).
[hevc_vaapi @ 0x3a3abc0] Pick normal P-picture to encode next.
[hevc_vaapi @ 0x3a3abc0] Issuing encode for pic 2/2 as type P.
[hevc_vaapi @ 0x3a3abc0] Refers to: 1/1.
[hevc_vaapi @ 0x3a3abc0] Input surface is 0x1b.
[h264 @ 0x3a8b200] Param buffer (type 0, 672 bytes) is 0x24.
[AVHWFramesContext @ 0x3a2a280] Created surface 0x26.
[h264 @ 0x3a8b200] Param buffer (type 1, 240 bytes) is 0x27.
[hevc_vaapi @ 0x3a3abc0] Recon surface is 0x26.
[hevc_vaapi @ 0x3a3abc0] Output buffer is 0x22.
[h264 @ 0x3a8b200] Slice 0 param buffer (3128 bytes) is 0x28.
[h264 @ 0x3a8b200] Slice 0 data buffer (3104 bytes) is 0x2a.
[h264 @ 0x3a8b200] Decode to surface 0x11.
[hevc_vaapi @ 0x3a3abc0] Param buffer (23) is 0x29.
[hevc_vaapi @ 0x3a3abc0] Slice 0: 0-22 (23 rows), 0-919 (920 blocks).
[hevc_vaapi @ 0x3a3abc0] RPS for POC 2: (1,1)
[hevc_vaapi @ 0x3a3abc0] Param buffer (24) is 0x24.
[hevc_vaapi @ 0x3a3abc0] Sync to pic 2/2 (input surface 0x1b).
[hevc_vaapi @ 0x3a3abc0] Output buffer: 4928 bytes (status babababa).
[hevc_vaapi @ 0x3a3abc0] Output read for pic 2/2.
[hevc_vaapi @ 0x3a3abc0] Output packet: pts 2 dts 2.
[hevc_vaapi @ 0x3a3abc0] Input frame: 1280x720 (3).
[hevc_vaapi @ 0x3a3abc0] Pick normal P-picture to encode next.
[hevc_vaapi @ 0x3a3abc0] Issuing encode for pic 3/3 as type P.
[hevc_vaapi @ 0x3a3abc0] Refers to: 2/2.
[hevc_vaapi @ 0x3a3abc0] Input surface is 0x19.
[h264 @ 0x3a8fac0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 2
[AVHWFramesContext @ 0x3a2a280] Created surface 0x24.
[hevc_vaapi @ 0x3a3abc0] Recon surface is 0x24.
[hevc_vaapi @ 0x3a3abc0] Output buffer is 0x22.
[h264 @ 0x3a8fac0] Param buffer (type 0, 672 bytes) is 0x27.
[h264 @ 0x3a8fac0] Param buffer (type 1, 240 bytes) is 0x29.
[hevc_vaapi @ 0x3a3abc0] Param buffer (23) is 0x28.
[hevc_vaapi @ 0x3a3abc0] Slice 0: 0-22 (23 rows), 0-919 (920 blocks).
[hevc_vaapi @ 0x3a3abc0] RPS for POC 3: (2,1)
[hevc_vaapi @ 0x3a3abc0] Param buffer (24) is 0x2b.
[h264 @ 0x3a8fac0] Slice 0 param buffer (3128 bytes) is 0x2a.
[hevc_vaapi @ 0x3a3abc0] Sync to pic 3/3 (input surface 0x19).
[h264 @ 0x3a8fac0] Slice 0 data buffer (16203 bytes) is 0x28.
[h264 @ 0x3a8fac0] Decode to surface 0x1a.
[hevc_vaapi @ 0x3a3abc0] Output buffer: 4944 bytes (status babababa).
[hevc_vaapi @ 0x3a3abc0] Output read for pic 3/3.
[hevc_vaapi @ 0x3a3abc0] Output packet: pts 3 dts 3.
Not writing 'clli' atom. No content light level info.
Not writing 'mdcv' atom. Missing mastering metadata.
frame=    4 fps=0.0 q=-0.0 Lsize=      67kB time=00:00:00.70 bitrate= 777.2kbits/s speed=8.87x
video:31kB audio:34kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.099009%
Input file #0 (sample.mkv):
  Input stream #0:0 (video): 14 packets read (140270 bytes); 5 frames decoded;
  Input stream #0:1 (audio): 23 packets read (35328 bytes);
  Total: 37 packets (175598 bytes) demuxed
Output file #0 (output.mp4):
  Output stream #0:0 (video): 4 frames encoded; 4 packets muxed (31656 bytes);
  Output stream #0:1 (audio): 23 packets muxed (35328 bytes);
  Total: 27 packets (66984 bytes) muxed
5 frames successfully decoded, 0 decoding errors
[AVIOContext @ 0x39215c0] Statistics: 2 seeks, 4 writeouts
[hevc_vaapi @ 0x3a3abc0] Freed output buffer 0x22
[AVIOContext @ 0x394b9c0] Statistics: 230161 bytes read, 2 seeks

...