[FFmpeg-user] Piping from FFmpeg to FFplay

Reino Wijnsma rwijnsma at xs4all.nl
Sun Nov 13 23:47:10 EET 2022

On 2022-11-13T22:18:15+0100, Michael Koch <astroelectronic at t-online.de> wrote:
> Is the "-" at the end an (undocumented) option of FFplay, or is it a batch file operator?

The first, I guess.
I've found 'opusenc' (Opus command-line encoder) to print:

   Usage: opusenc [options] input_file output_file.opus


   input_file can be:
     filename.wav      file
     -                 stdin

   output_file can be:
     filename.opus     compressed file
     -                 stdout


But I also have lots of other binaries where the help-section doesn't mention the dash or stdin.
So I guess the developers assume it's common knowledge.


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