[FFmpeg-user] What argument(s) does 'ashowinfo' take?

[Mark Filipak]

On 03/01/2020 06:49 PM, Carl Eugen Hoyos wrote:
> Am Mo., 2. März 2020 um 00:12 Uhr schrieb Mark Filipak
> <markfilipak.windows+ffmpeg at gmail.com>:
>>
>> What argument(s) does 'ashowinfo' take?
> 
> No arguments, see:
> $ ffmpeg -help filter=ashowinfo
> 
>>   >ffprobe -ashowinfo -i g:\VIDEO_TS\VTS_01_1.VOB
> 
> ffprobe doesn't know about filters.
> 
> Carl Eugen

Thanks, Carl. Are there any usage examples?

 >ffmpeg --help filter=ashowinfo
ffmpeg version N-94664-g0821bc4eee Copyright (c) 2000-2019 the FFmpeg 
developers
   built with gcc 9.1.1 (GCC) 20190807
   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. 33.100 / 56. 33.100
   libavcodec     58. 55.101 / 58. 55.101
   libavformat    58. 31.104 / 58. 31.104
   libavdevice    58.  9.100 / 58.  9.100
   libavfilter     7. 58.101 /  7. 58.101
   libswscale      5.  6.100 /  5.  6.100
   libswresample   3.  6.100 /  3.  6.100
   libpostproc    55.  6.100 / 55.  6.100
Filter ashowinfo
   Show textual information for each audio frame.
     Inputs:
        #0: default (audio)
     Outputs:
        #0: default (audio)


Regarding 'ffprobe', I think I get it now. If 'ffprobe' doesn't 
recognize a help topic, instead of reporting that the topic doesn't 
exist as an 'ffprobe' item, it prints general help. That's not very 
friendly.