ffmpeg -hwaccel vaapi -hwaccel_output_format vaapi -i Untraceable.m2t -v verbose -map 0:0 -vcodec hevc_vaapi -t 60 -y 1min-2.mp4 2> mylog.txt

ffmpeg version 3.4.4 Copyright (c) 2000-2018 the FFmpeg developers
  built with gcc 7 (SUSE Linux)
  configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --incdir=/usr/include/ffmpeg --extra-cflags='-fmessage-length=0 -grecord-gcc-switches -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector-strong -funwind-tables -fasynchronous-unwind-tables -fstack-clash-protection -g' --optflags='-fmessage-length=0 -grecord-gcc-switches -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector-strong -funwind-tables -fasynchronous-unwind-tables -fstack-clash-protection -g' --disable-htmlpages --enable-pic --disable-stripping --enable-shared --disable-static --enable-gpl --disable-openssl --enable-avresample --enable-libcdio --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libcelt --enable-libcdio --enable-libdc1394 --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libzimg --enable-libzvbi --enable-vaapi --enable-vdpau --enable-libx264 --enable-libx265 --enable-libxvid
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
[mpegts @ 0x558993f21020] parser not found for codec dvb_teletext, packets or times may be invalid.
[libzvbi_teletextdec @ 0x558993f45a60] page filter: *
[mpegts @ 0x558993f21020] parser not found for codec dvb_teletext, packets or times may be invalid.
[libzvbi_teletextdec @ 0x558993f45a60] page filter: *
[mpeg2video @ 0x558993f255c0] Invalid frame dimensions 0x0.
    Last message repeated 7 times
[mpegts @ 0x558993f21020] max_analyze_duration 5000000 reached at 5000000 microseconds st:5
[mpegts @ 0x558993f21020] start time for stream 6 is not set in estimate_timings_from_pts
[mpegts @ 0x558993f21020] PES packet size mismatch
    Last message repeated 4 times
Input #0, mpegts, from 'Untraceable.m2t':
  Duration: 01:45:00.34, start: 21218.495978, bitrate: 5947 kb/s
  Program 28014
    Stream #0:0[0x294]: Video: mpeg2video (Main), 1 reference frame ([2][0][0][0] / 0x0002), yuv420p(tv, top first, left), 720x576 [SAR 64:45 DAR 16:9], 25 fps, 25 tbr, 90k tbn, 50 tbc
    Stream #0:1[0x29e](deu): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 256 kb/s
    Stream #0:2[0x29f](mis): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 192 kb/s
    Stream #0:3[0x2a3](deu): Audio: ac3 ([6][0][0][0] / 0x0006), 48000 Hz, 5.1(side), fltp, 448 kb/s
    Stream #0:4[0x2a0](mul): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 192 kb/s
    Stream #0:5[0x2a8](deu): Subtitle: dvb_teletext ([6][0][0][0] / 0x0006), 492x250
    Stream #0:6[0x2a9](deu): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006) (hearing impaired)
[AVHWDeviceContext @ 0x558993f47180] Opened VA display via X11 display :0.
[AVHWDeviceContext @ 0x558993f47180] libva: VA-API version 1.3.0
[AVHWDeviceContext @ 0x558993f47180] libva: va_getDriverName() returns 0
[AVHWDeviceContext @ 0x558993f47180] libva: Trying to open /usr/lib64/dri/radeonsi_drv_video.so
[AVHWDeviceContext @ 0x558993f47180] libva: Found init function __vaDriverInit_1_3
[AVHWDeviceContext @ 0x558993f47180] libva: va_openDriver() returns 0
[AVHWDeviceContext @ 0x558993f47180] Initialised VAAPI connection: version 1.3
[AVHWDeviceContext @ 0x558993f47180] Unknown driver "Mesa Gallium driver 18.3.2 for Radeon RX 580 Series (POLARIS10, DRM 3.27.0, 4.12.14-lp151.27-default, LLVM 7.0.1)", assuming standard behaviour.
Stream mapping:
  Stream #0:0 -> #0:0 (mpeg2video (native) -> hevc (hevc_vaapi))
Press [q] to stop, [?] for help
[mpegts @ 0x558993f21020] Correcting start time by 340000
[graph 0 input from stream 0:0 @ 0x5589944b8200] w:720 h:576 pixfmt:vaapi_vld tb:1/90000 fr:25/1 sar:64/45 sws_param:flags=2
[hevc_vaapi @ 0x558993f84140] B frames are not supported (0x1).
Error initializing output stream 0:0 -- Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
Conversion failed!