FFmpeg compand filter not working

Question

I ran the following batch, and didn't get any output:

ffmpeg -i e.mkv -af compand=attacks=0:points=-80/-80|-12/-12|20/-12 -vcodec copy r.mp4

I'm using this XP version of FFmpeg.

I tried "-report" and it didn't work. I think the problem is with the vertical bars. — mikko, Aug 23, 2017 at 14:28
Put everything in quotes: -af "compand=…" (or perhaps single quotes, not a Windows user, cannot test) — slhck, Aug 23, 2017 at 14:32

slhck · Accepted Answer · 2017-08-23 14:47:34Z

2

When calling your command from a shell, special characters like slashes, semicolons, or pipes need to be escaped or quoted properly.

So, put the entire filter value in quotes:

ffmpeg -i e.mkv -af "compand=attacks=0:points=-80/-80|-12/-12|20/-12" -vcodec copy r.mp4

answered Aug 23, 2017 at 14:47

slhck

228k71 gold badges615 silver badges601 bronze badges

Add a comment |

1 Answer 1