[FFmpeg-user] ffmpeg unexpectedly increases debug level for console messages

Dmitry Katsubo dma_k at mail.ru
Wed Aug 10 02:25:46 EEST 2022

On 2022-08-08 17:43, Gyan Doshi wrote:
> On 2022-08-08 08:02 pm, Dmitry Katsubo via ffmpeg-user wrote:
>> Dear ffmpeg community,
>> I have ffmpeg for Windows x64 downloaded from https://www.gyan.dev/ffmpeg/builds/
>> When ffmpeg is started from CygWin or Windows WSL the following happens:
>> * It reports "error parsing debug value" and increases the debug level (verbosity of the messages printed to screen):
>> $ ffmpeg.exe -y -v warning -i in.avs -c:v libx264 -crf 28 -c:a libvorbis -q:a 5 out.mkv
> Can't repro here in WSL.
For some inputs it runs also without issues for me as well. I will keep an eye on that, as the issue is not always reproducible.

>> Guessed Channel Layout for Input Stream #0.1 : stereo
>> error parsing debug value
> This message is printed when ffmpeg receives a 'd' key press and then some non-numeral presses.
Strange. I didn't press any key :)

> Check if adding -nostdin suppresses the behaviour.
I've solved the issue by adding
&> /dev/null
to command line but your solution works as well.


With best regards,

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