What I wanted to do:
ASUS@JOHN /m/d/Music> ffplay -f lavfi "amovie='02.\ Overworld.mp3'[in];[in]showcqt[out:v];[in]aresample=44100[out:a]"
ffplay version 2024-07-15-git-350146a1ea-full_build-www.gyan.dev Copyright (c) 2003-2024 the FFmpeg developers
built with gcc 13.2.0 (Rev5, Built by MSYS2 project)
configuration: (pruned)
libavutil 59. 28.100 / 59. 28.100
libavcodec 61. 10.100 / 61. 10.100
libavformat 61. 5.101 / 61. 5.101
libavdevice 61. 2.100 / 61. 2.100
libavfilter 10. 2.102 / 10. 2.102
libswscale 8. 2.100 / 8. 2.100
libswresample 5. 2.100 / 5. 2.100
libpostproc 58. 2.100 / 58. 2.100
[mp3 @ 00000154d71761c0] Estimating duration from bitrate, this may be inaccurate
[lavfi @ 00000154d7153340] Open inputs in the filtergraph are not acceptable
amovie='02.\ Overworld.mp3'[in];[in]showcqt[out:v];[in]aresample=44100[out:a]: Invalid argumentWhat I actually had to do:
ASUS@JOHN /m/d/Music> ffmpeg -v -8 -i 02.\ Overworld.mp3 -filter_complex "[0:a]showcqt[out]" -map "[out]" -map 0:a -c:v rawvideo -c:a pcm_f64le -f nut pipe: | ffplay -i pipe:
ffplay version 2024-07-15-git-350146a1ea-full_build-www.gyan.dev Copyright (c) 2003-2024 the FFmpeg developers
built with gcc 13.2.0 (Rev5, Built by MSYS2 project)
configuration: (pruned)
libavutil 59. 28.100 / 59. 28.100
libavcodec 61. 10.100 / 61. 10.100
libavformat 61. 5.101 / 61. 5.101
libavdevice 61. 2.100 / 61. 2.100
libavfilter 10. 2.102 / 10. 2.102
libswscale 8. 2.100 / 8. 2.100
libswresample 5. 2.100 / 5. 2.100
libpostproc 58. 2.100 / 58. 2.100
Input #0, nut, from 'pipe:':aq= 0KB vq= 0KB sq= 0B
Metadata:
TBPM : 105
encoded_by : LAME in FL Studio 20
date : 2023
encoder : Lavf61.5.101
Duration: N/A, start: 0.000000, bitrate: N/A
Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 1920x1080, SAR 1:1 DAR 16:9, 25 tbr, 51200 tbn
Metadata:
encoder : Lavc61.10.100 rawvideo
Stream #0:1: Audio: pcm_f64le (PFD[64] / 0x40444650), 44100 Hz, 2 channels, dbl, 5644 kb/s
Metadata:
encoder : Lavc61.10.100 pcm_f64le
23.08 A-V: -0.016 fd= 6 aq= 18KB vq=18225KB sq= 0Bthanks ffmpeg