[FFmpeg-trac] #6477(undetermined:closed): NVENC: Warn explicitly when specific bit rate is out of range

[FFmpeg]

#6477: NVENC: Warn explicitly when specific bit rate is out of range
-------------------------------------+-------------------------------------
             Reporter:  alexpigment  |                    Owner:
                 Type:  enhancement  |                   Status:  closed
             Priority:  normal       |                Component:
              Version:  unspecified  |  undetermined
             Keywords:  nvenc        |               Resolution:
             Blocking:               |  needs_more_info
Analyzed by developer:  0            |               Blocked By:
                                     |  Reproduced by developer:  0
-------------------------------------+-------------------------------------

Comment (by alexpigment):

 Well, I assumed the reproduction steps would lead to the error message
 listed in the description, but I guess that's incorrect. Providing console
 dump.

 {{{
 C:\>ffmpeg.exe -f lavfi -i smptebars -c:v h264_nvenc -s 1920x1080 -aspect
 16:9 -
 profile:v high -r 29.97 -t 5 -rc cbr_hq -b:v 144.1M 1080p.mp4
 ffmpeg version N-89343-g83ecdc9a92 Copyright (c) 2000-2017 the FFmpeg
 developers

   built with gcc 7.2.0 (GCC)
   configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-
 bzlib --e
 nable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-
 libblur
 ay --enable-libfreetype --enable-libmp3lame --enable-libopenjpeg --enable-
 libopu
 s --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora
 --ena
 ble-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp
 --enable-lib
 x264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma
 --enable-z
 lib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-cuda
 --enable-c
 uvid --enable-d3d11va --enable-nvenc --enable-dxva2 --enable-avisynth
 --enable-l
 ibmfx
   libavutil      56.  4.100 / 56.  4.100
   libavcodec     58.  6.102 / 58.  6.102
   libavformat    58.  2.103 / 58.  2.103
   libavdevice    58.  0.100 / 58.  0.100
   libavfilter     7.  5.100 /  7.  5.100
   libswscale      5.  0.101 /  5.  0.101
   libswresample   3.  0.101 /  3.  0.101
   libpostproc    55.  0.100 / 55.  0.100
 Input #0, lavfi, from 'smptebars':
   Duration: N/A, start: 0.000000, bitrate: N/A
     Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 320x240
 [SAR 1:1
 DAR 4:3], 25 tbr, 25 tbn, 25 tbc
 Stream mapping:
   Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (h264_nvenc))
 Press [q] to stop, [?] for help
 [h264_nvenc @ 000000000061ffe0] InitializeEncoder failed: invalid param
 (8)
 Error initializing output stream 0:0 -- Error while opening encoder for
 output s
 tream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or
 height
 Conversion failed!
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/6477#comment:4>
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