[FFmpeg-user] Issue with hwaccel cuvid

[Andy Sheimo]

I keep getting an error on some files and it appears to be due to a
scaler being inserted but I don't know how to fix it. Any help would be
appreciated. logging below:

K:\Video\GAMERA THE BRAVE>ffmpeg -loglevel verbose -hwaccel cuvid
-hwaccel_output_format yuv420p -c:v mpeg2_cuvid -i
"l:\welter_originals\gamera the brave\Latatude Zero-trailer.mkv" -c:a copy
-c:v h264_nvenc test.mkv
ffmpeg version 4.2.2 Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 9.2.1 (GCC) 20200122
  configuration: --enable-gpl --enable-version3 --enable-sdl2
--enable-fontconfig --enable-gnutls --enable-iconv --enable-libass
--enable-libdav1d --enable-libbluray --enable-libfreetype
--enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb
--enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy
--enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx
--enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265
--enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp
--enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc
--enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom
--enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid
--enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2
--enable-avisynth --enable-libopenmpt
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Input #0, matroska,webm, from 'l:\welter_originals\gamera the
brave\Latatude Zero-trailer.mkv':
  Metadata:
    encoder         : libmakemkv v1.15.0 (1.3.5/1.4.7) win(x64-release)
    creation_time   : 2020-03-05T18:41:29.000000Z
  Duration: 00:02:28.75, start: 0.000000, bitrate: 4685 kb/s
    Stream #0:0(eng): Video: mpeg2video (Main), 1 reference frame,
yuv420p(tv, top first, left), 720x480 [SAR 32:27 DAR 16:9], SAR 186:157 DAR
279:157, 29.97 fps, 29.97 tbr, 1k tbn, 59.94 tbc
    Metadata:
      BPS-eng         : 4488094
      DURATION-eng    : 00:02:28.748600000
      NUMBER_OF_FRAMES-eng: 3567
      NUMBER_OF_BYTES-eng: 83449382
      SOURCE_ID-eng   : 0100E0
      _STATISTICS_WRITING_APP-eng: MakeMKV v1.15.0 win(x64-release)
      _STATISTICS_WRITING_DATE_UTC-eng: 2020-03-05 18:41:29
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
SOURCE_ID
    Stream #0:1(eng): Audio: ac3, 48000 Hz, mono, fltp, 192 kb/s (default)
    Metadata:
      title           : Mono
      BPS-eng         : 192000
      DURATION-eng    : 00:02:28.704000000
      NUMBER_OF_FRAMES-eng: 4647
      NUMBER_OF_BYTES-eng: 3568896
      SOURCE_ID-eng   : 0180BD
      _STATISTICS_WRITING_APP-eng: MakeMKV v1.15.0 win(x64-release)
      _STATISTICS_WRITING_DATE_UTC-eng: 2020-03-05 18:41:29
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
SOURCE_ID
File 'test.mkv' already exists. Overwrite ? [y/N] y
[mpeg2_cuvid @ 000001ec985dfbc0] Initializing cuvid hwaccel
[mpeg2_cuvid @ 000001ec985dfbc0] CUVID capabilities for mpeg2_cuvid:
[mpeg2_cuvid @ 000001ec985dfbc0] 8 bit: supported: 1, min_width: 48,
max_width: 4080, min_height: 16, max_height: 4080
[mpeg2_cuvid @ 000001ec985dfbc0] 10 bit: supported: 0, min_width: 0,
max_width: 0, min_height: 0, max_height: 0
[mpeg2_cuvid @ 000001ec985dfbc0] 12 bit: supported: 0, min_width: 0,
max_width: 0, min_height: 0, max_height: 0
Stream mapping:
  Stream #0:0 -> #0:0 (mpeg2video (mpeg2_cuvid) -> h264 (h264_nvenc))
  Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
[mpeg2_cuvid @ 000001ec985dfbc0] Initializing cuvid hwaccel
[mpeg2_cuvid @ 000001ec985dfbc0] Formats: Original: cuda | HW: cuda | SW:
nv12
[graph 0 input from stream 0:0 @ 000001ec98632f00] w:720 h:480 pixfmt:cuda
tb:1/1000 fr:30000/1001 sar:186/157 sws_param:flags=2
[h264_nvenc @ 000001ec985efe00] Loaded Nvenc version 10.0
[h264_nvenc @ 000001ec985efe00] Nvenc initialized successfully
Output #0, matroska, to 'test.mkv':
  Metadata:
    encoder         : Lavf58.29.100
    Stream #0:0(eng): Video: h264 (h264_nvenc) (Main), 1 reference frame
(H264 / 0x34363248), cuda(left), 720x480 [SAR 186:157 DAR 279:157],
q=-1--1, 2000 kb/s, 29.97 fps, 1k tbn, 29.97 tbc
    Metadata:
      BPS-eng         : 4488094
      DURATION-eng    : 00:02:28.748600000
      NUMBER_OF_FRAMES-eng: 3567
      NUMBER_OF_BYTES-eng: 83449382
      SOURCE_ID-eng   : 0100E0
      _STATISTICS_WRITING_APP-eng: MakeMKV v1.15.0 win(x64-release)
      _STATISTICS_WRITING_DATE_UTC-eng: 2020-03-05 18:41:29
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
SOURCE_ID
      encoder         : Lavc58.54.100 h264_nvenc
    Side data:
      cpb: bitrate max/min/avg: 0/0/2000000 buffer size: 4000000 vbv_delay:
-1
    Stream #0:1(eng): Audio: ac3 ([0] [0][0] / 0x2000), 48000 Hz, mono,
fltp, 192 kb/s (default)
    Metadata:
      title           : Mono
      BPS-eng         : 192000
      DURATION-eng    : 00:02:28.704000000
      NUMBER_OF_FRAMES-eng: 4647
      NUMBER_OF_BYTES-eng: 3568896
      SOURCE_ID-eng   : 0180BD
      _STATISTICS_WRITING_APP-eng: MakeMKV v1.15.0 win(x64-release)
      _STATISTICS_WRITING_DATE_UTC-eng: 2020-03-05 18:41:29
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
SOURCE_ID
[mpeg2_cuvid @ 000001ec985dfbc0] Initializing cuvid hwaccel2
bitrate=1805.6kbits/s speed=77.9x
[mpeg2_cuvid @ 000001ec985dfbc0] Formats: Original: cuda | HW: cuda | SW:
nv12
[graph 0 input from stream 0:0 @ 000001ec985e3a40] w:720 h:480 pixfmt:cuda
tb:1/1000 fr:30000/1001 sar:186/157 sws_param:flags=2
[scaler_out_0_0 @ 000001ecac63f100] w:720 h:480 flags:'bicubic' interl:0
[auto_scaler_0 @ 000001ec986aed80] w:iw h:ih flags:'bicubic' interl:0
[scaler_out_0_0 @ 000001ecac63f100] auto-inserting filter 'auto_scaler_0'
between the filter 'Parsed_null_0' and the filter 'scaler_out_0_0'
Impossible to convert between the formats supported by the filter
'Parsed_null_0' and the filter 'auto_scaler_0'
Error reinitializing filters!
Failed to inject frame into filter network: Function not implemented
Error while processing the decoded data for stream #0:0
[AVIOContext @ 000001ec985f1b00] Statistics: 0 seeks, 156 writeouts
[h264_nvenc @ 000001ec985efe00] Nvenc unloaded
[AVIOContext @ 000001ec985e3bc0] Statistics: 87142507 bytes read, 2 seeks
Conversion failed!