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From: Timo Rothenpieler <timo@rothenpieler.org>
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Subject: Re: [FFmpeg-devel] [PATCH] avdevice/lavfi: output wrapped AVFrames
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On 02.07.2022 10:54, Michael Niedermayer wrote:
> seems to get this stuck:
> ./ffmpeg -f lavfi -i 'amovie=fate-suite/wavpack/num_channels/eva_2.22_6.1_16bit-partial.wv,asplit=3[out1][a][b]; [a]showwaves=s=340x240,pad=iw:ih*2[waves]; [b]showspectrum=s=340x240[spectrum]; [waves][spectrum] overlay=0:h [out0]'   file-waves.avi
> 
> (stuck as in OOM killed)

Yeah, same thing is happening here. Very odd for sure.
Seems like it's just buffering an endless amount of frames, without ever 
starting to read and output them.
No idea why (yet)
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