Resolution can be 1920x1080 or 960x540.
0a64fb7 avfilter/avf_showcqt: add option for lower resolution
doc/filters.texi | 12 ++++-
libavfilter/avf_showcqt.c | 114 +++++++++++++++++++++++++++------------------
2 files changed, 80 insertions(+), 46 deletions(-)