Support piped input with QtAVPlayer

[g-maxime]

Needs a modified version of QtAVPlayer, discussion valbok/QtAVPlayer#507

Snapshot

Please test and also check stats coherency with olders versions

[dericed]

currently this doesn't crash but hangs during processing

$ ffmpeg -f lavfi -i mandelbrot -f lavfi -i sine -ac 2 -pix_fmt yuv422p10le -c:v ffv1 -c:a flac -t 3 test.mkv

$ cat test.mkv | /usr/local/bin/qcli -i - -a -video all -audio all -f signalstats+cropdetect+psnr+ebur128+aphasemeter+astats+ssim+idet+deflicker+entropy+entropy-diff -o test.mkv.qctools.mkv
qcli 1.3.20241221, Dec 21 2024 11:08:09
filters selected: signalstats cropdetect psnr ebur128 aphasemeter astats ssim idet deflicker entropy entropy-diff 

analyzing input file... -
.                                                  2 of 100 %

just stays at 2%

[dericed]

will merge, the filter chain issue seems different than the pipe issue