[FFmpeg-user] Unable to use hardware encoder h264_rkmpp with software decoded ATSC OTA transmission using rk

[Brad Bruggemann]

When attempting to hardware encode to h264 using the Rockchip MPP encoder
h264_rkmpp from an ATSC source, FFMPEG errors out with:

"Impossible to convert between the formats supported by the filter
'Parsed_null_0' and the filter 'auto_scaler_0'"
The sample file used in this example can be downloaded here:
https://transfer.sh/BRMej/out.ts

The full command used and resulting output is as follows:
$ ffmpeg -loglevel 48 -c:v mpeg2video -f mpegts -i out.ts -f mp4 -c:v
h264_rkmpp -c:a libfdk_aac -preset ultrafast -mbd rd -copyinkf -flags
+ilme+ildct -fflags +genpts out.mp4 -y

ffmpeg version 589de66a0b Copyright (c) 2000-2018 the FFmpeg developers
  built with gcc 9.3.0 (GCC)
  configuration: --prefix=/usr/local --extra-libs='-lpthread -lm'
--enable-hardcoded-tables --enable-gpl --enable-libass
--enable-libfdk-aac --enable-libfreetype --enable-libmp3lame
--enable-libopus --enable-libvorbis --enable-libvpx --enable-libx264
--enable-rkmpp --enable-version3 --enable-libdrm --enable-libx265
--enable-nonfree
  libavutil      56. 14.100 / 56. 14.100
  libavcodec     58. 18.100 / 58. 18.100
  libavformat    58. 12.100 / 58. 12.100
  libavdevice    58.  3.100 / 58.  3.100
  libavfilter     7. 16.100 /  7. 16.100
  libswscale      5.  1.100 /  5.  1.100
  libswresample   3.  1.100 /  3.  1.100
  libpostproc    55.  1.100 / 55.  1.100
Splitting the commandline.
Reading option '-loglevel' ... matched as option 'loglevel' (set
logging level) with argument '48'.
Reading option '-c:v' ... matched as option 'c' (codec name) with
argument 'mpeg2video'.
Reading option '-f' ... matched as option 'f' (force format) with
argument 'mpegts'.
Reading option '-i' ... matched as input url with argument 'out.ts'.
Reading option '-f' ... matched as option 'f' (force format) with
argument 'mp4'.
Reading option '-c:v' ... matched as option 'c' (codec name) with
argument 'h264_rkmpp'.
Reading option '-c:a' ... matched as option 'c' (codec name) with
argument 'libfdk_aac'.
Reading option '-preset' ... matched as AVOption 'preset' with
argument 'ultrafast'.
Reading option '-mbd' ... matched as AVOption 'mbd' with argument 'rd'.
Reading option '-copyinkf' ... matched as option 'copyinkf' (copy
initial non-keyframes) with argument '1'.
Reading option '-flags' ... matched as AVOption 'flags' with argument
'+ilme+ildct'.
Reading option '-fflags' ... matched as AVOption 'fflags' with
argument '+genpts'.
Reading option 'out.mp4' ... matched as output url.
Reading option '-y' ... matched as option 'y' (overwrite output files)
with argument '1'.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option loglevel (set logging level) with argument 48.
Applying option y (overwrite output files) with argument 1.
Successfully parsed a group of options.
Parsing a group of options: input url out.ts.
Applying option c:v (codec name) with argument mpeg2video.
Applying option f (force format) with argument mpegts.
Successfully parsed a group of options.
Opening an input file: out.ts.
[mpegts @ 0xaaab03c8df20] Opening 'out.ts' for reading
[file @ 0xaaab03c8e820] Setting default whitelist 'file,crypto'
[mpegts @ 0xaaab03c8df20] Before avformat_find_stream_info() pos: 0
bytes read:5013504 seeks:1 nb_streams:0
[mpegts @ 0xaaab03c8df20] stream=0 stream_type=0 pid=31 prog_reg_desc=
[mpegts @ 0xaaab03c8df20] probing stream 0 pp:2500
[mpegts @ 0xaaab03c8df20] Probe with size=204749, packets=1 detected
mpegvideo with score=25
[mpegts @ 0xaaab03c8df20] probed stream 0
[mpegts @ 0xaaab03c8df20] stream=1 stream_type=0 pid=34 prog_reg_desc=
[mpeg2video @ 0xaaab03cab640] Format yuv420p chosen by get_format().
[mpegts @ 0xaaab03c8df20] probing stream 1 pp:2500
[mpegts @ 0xaaab03c8df20] Probe with size=7680, packets=1 detected ac3
with score=25
[mpegts @ 0xaaab03c8df20] probed stream 1
[mpegts @ 0xaaab03c8df20] max_analyze_duration 5000000 reached at
5005000 microseconds st:0
[mpegts @ 0xaaab03c8df20] PES packet size mismatch
[mpegts @ 0xaaab03c8df20] After avformat_find_stream_info() pos: 0
bytes read:9195664 seeks:3 frames:306
Input #0, mpegts, from 'out.ts':
  Duration: 00:00:18.42, start: 29234.532200, bitrate: 5406 kb/s
    Stream #0:0[0x31], 152, 1/90000: Video: mpeg2video (Main), 1
reference frame, yuv420p(yuv420p) (tv, bt709, top first, left),
1920x1080 [SAR 1:1 DAR 16:9], 0/1, Closed Captions, 29.97 fps, 29.97
tbr, 90k tbn, 59.94 tbc
    Stream #0:1[0x34], 154, 1/90000: Audio: ac3, 48000 Hz, 5.1(side),
fltp, 384 kb/s
Successfully opened the file.
Parsing a group of options: output url out.mp4.
Applying option f (force format) with argument mp4.
Applying option c:v (codec name) with argument h264_rkmpp.
Applying option c:a (codec name) with argument libfdk_aac.
Applying option copyinkf (copy initial non-keyframes) with argument 1.
Successfully parsed a group of options.
Opening an output file: out.mp4.
Codec AVOption preset (Set the encoding preset (cf. x264 --fullhelp))
specified for output file #0 (out.mp4) has not been used for any
stream. The most likely reason is either wrong type (e.g. a video
option with no video streams) or that it is a private option of some
encoder which was not actually used for any stream.
[file @ 0xaaab03cadfd0] Setting default whitelist 'file,crypto'
Successfully opened the file.
detected 4 logical cores
Stream mapping:
  Stream #0:0 -> #0:0 (mpeg2video (native) -> h264 (h264_rkmpp))
  Stream #0:1 -> #0:1 (ac3 (native) -> aac (libfdk_aac))
Press [q] to stop, [?] for help
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[mpeg2video @ 0xaaab03caf190] Format yuv420p chosen by get_format().
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[mpeg2video @ 0xaaab03caf190] Skipping B slice due to open GOP
    Last message repeated 67 times
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[mpeg2video @ 0xaaab03caf190] Skipping B slice due to open GOP
    Last message repeated 67 times
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[graph 0 input from stream 0:0 @ 0xaaab03fa2030] Setting 'video_size'
to value '1920x1080'
[graph 0 input from stream 0:0 @ 0xaaab03fa2030] Setting 'pix_fmt' to value '0'
[graph 0 input from stream 0:0 @ 0xaaab03fa2030] Setting 'time_base'
to value '1/90000'
[graph 0 input from stream 0:0 @ 0xaaab03fa2030] Setting
'pixel_aspect' to value '1/1'
[graph 0 input from stream 0:0 @ 0xaaab03fa2030] Setting 'sws_param'
to value 'flags=2'
[graph 0 input from stream 0:0 @ 0xaaab03fa2030] Setting 'frame_rate'
to value '30000/1001'
[graph 0 input from stream 0:0 @ 0xaaab03fa2030] w:1920 h:1080
pixfmt:yuv420p tb:1/90000 fr:30000/1001 sar:1/1 sws_param:flags=2
[format @ 0xaaab03d12a00] Setting 'pix_fmts' to value 'drm_prime'
[auto_scaler_0 @ 0xaaab03cedac0] Setting 'flags' to value 'bicubic'
[auto_scaler_0 @ 0xaaab03cedac0] w:iw h:ih flags:'bicubic' interl:0
[format @ 0xaaab03d12a00] auto-inserting filter 'auto_scaler_0'
between the filter 'Parsed_null_0' and the filter 'format'
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 @ 0xaaab03d0a4c0] Statistics: 0 seeks, 0 writeouts
[AVIOContext @ 0xaaab03c968f0] Statistics: 9556112 bytes read, 3 seeks
Conversion failed!