[FFmpeg-user] error in Codec AVOption b

Carl Eugen Hoyos ceffmpeg at gmail.com
Wed Nov 13 23:46:36 EET 2019

> Am 14.11.2019 um 03:08 schrieb Michele Salerno <mikysal78 at gmail.com>:
> I have this command:
> ffmpeg -y -hide_banner -threads 8 -hwaccel nvdec
> -hwaccel_output_format cuda -i INPUT.mp4 \
> -vf scale_cuda=-1:360 -c:v h264_nvenc -rc vbr -minrate 400k -maxrate
> 1500k -bufsize 1500k \
> -acodec aac -strict experimental -ar 44100 -b:a 64k \
> -preset slow -flags +loop -cmp chroma -subq 6 -me_range 16 -g 250
> -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71 -b_strategy 1 \
> -map 0:v -map 0:a? OUTPUT.mp4
> I have this messages:
> Codec AVOption b (set bitrate (in bits/s)) specified for output file
> #0 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.
> In OUTPUT-mp4 the audio is stripped
> Because?

Complete, uncut console output missing, please don’t forget to remove “hide_banner” from your command as we are unable to understand the console output if that option is used.

Carl Eugen

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