HackRF piped data error.

hackrf-transfer-pipe.txt

gyaresu@zaphod:~/programming/iridium-toolkit|experiment
⇒  hackrf_transfer -f 1625800000 -a1 -l40 -g20 -s 2000000 -r /dev/fd/3 3>&1 1>&2 | python extractor.py -c 1625800000 -r 2000000 -f hackrf --jobs 7 | fgrep "A:OK"
/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/font_manager.py:273: UserWarning: Matplotlib is building the font cache using fc-list. This may take a moment.
  warnings.warn('Matplotlib is building the font cache using fc-list. This may take a moment.')
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1454552438 | i:   0/s | i_avg:  28/s | q:   12 | q_max:   12 | o:  0/s | ok: 100% | ok:  0/s | ok_avg: 100% | ok:          1 | ok_avg:   2/s | d: 0
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call hackrf_sample_rate_set(2000000 Hz/2.000 MHz)
call hackrf_baseband_filter_bandwidth_set(1750000 Hz/1.750 MHz)
call hackrf_set_freq(1625800000 Hz/1625.800 MHz)
call hackrf_set_amp_enable(1)
Stop with Ctrl-C
 0.3 MiB / 1.000 sec =  0.3 MiB/second
 0.0 MiB / 1.001 sec =  0.0 MiB/second

Couldn't transfer any bytes for one second.

Exiting... hackrf_is_streaming() result: HACKRF_TRUE (1)
Total time: 2.00075 s
hackrf_stop_rx() done
hackrf_close() done
hackrf_exit() done
fclose(fd) done
exit
RAW: i-1454552438.0209-t1 000000026 1626218890 A:OK L:OK  98% 0.109 103 <001100000011000011110011> 00110101101100010101010010001101 10111011000110001011100000010001 00111101100110010001010011000101 11111111111111111111111111111111 11111111111111111111111111111111 [100101111010110110110011001111]1001110100000110
gyaresu@zaphod:~/programming/iridium-toolkit|experiment

--- whereas this works ---
hackrf_transfer -f 1625800000 -a1 -l32 -g20 -s 2000000 -r /dev/stdout | python extractor.py -c 1625800000 -r 2000000 -f hackrf --jobs 7 --db 9| fgrep "A:OK" > /radio/32.extracted
1454552982 | i:   2/s | i_avg:   2/s | q:    0 | q_max:    4 | o:  2/s | ok:  49% | ok:  1/s | ok_avg:  49% | ok:         88 | ok_avg:   1/s | d: 0
1454553042 | i:   2/s | i_avg:   2/s | q:    0 | q_max:    2 | o:  2/s | ok:  57% | ok:  1/s | ok_avg:  53% | ok:        174 | ok_avg:   1/s | d: 0
1454553102 | i:   3/s | i_avg:   2/s | q:    0 | q_max:    4 | o:  3/s | ok:  39% | ok:  1/s | ok_avg:  47% | ok:        249 | ok_avg:   1/s | d: 0
1454553162 | i:   4/s | i_avg:   3/s | q:    0 | q_max:    6 | o:  4/s | ok:  23% | ok:  1/s | ok_avg:  39% | ok:        310 | ok_avg:   1/s | d: 0
Ran into burst squelch at 284231.68
1454553224 | i:   1/s | i_avg:   2/s | q:    0 | q_max:   18 | o:  1/s | ok:  42% | ok:  0/s | ok_avg:  40% | ok:        354 | ok_avg:   1/s | d: 0
Ran into burst squelch at 316801.024