Opened 5 months ago
#11070 new defect
showwaves filter doesn't work any more
| Reported by: | Michael Koch | Owned by: | |
|---|---|---|---|
| Priority: | normal | Component: | avfilter |
| Version: | git-master | Keywords: | |
| Cc: | Blocked By: | ||
| Blocking: | Reproduced by developer: | no | |
| Analyzed by developer: | no |
Description
This is an example from chapter 3.48 in my book:
http://www.astro-electronic.de/FFmpeg_Book.pdf
I'm sure it did work some time ago, when I wrote this chapter. Now it doesn't work any more. The output is only a line.
rem Create a sample waveform:
ffmpeg -f lavfi -i sine=250:b=2 -t 0.2 -y sine.wav
rem Convert the waveform to an image:
ffmpeg -i sine.wav -lavfi showwaves=n=15:mode=p2p:draw=full -frames 1 -y waveform.png
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