face_encodings method freezes program on raspberry pi

[codeundercoverdev]

• face_recognition version: Latest
• Python version: 3.4.2
• Operating System: Raspbian Jessie

Description

Thanks for making this - it is awesome.

The face_encodings method seems to freeze the python shell. No error - the shell just stops printing or doing anything:

obama_image = face_recognition.load_image_file("obama_small.jpg")
print("image loaded")
obama_face_encoding = face_recognition.face_encodings(obama_image)[0]
print("image encoded")

The above code just returns:

image loaded

Any idea how to fix this?

What I Did

Paste the command(s) you ran and the output.
I just run the program with python3 facerec_on_raspberry_pi.py

If there was a crash, please include the traceback here.

[ageitgey]

Sounds like the same or similar issue as in #109, so just linking these issues.

[codeundercoverdev]

Yea, I saw #109 but unlike that one I can't even ctrl-c out. It just freezes.

[ageitgey]

Strange. I didn't have this issue when I lasted tested it on an RPi, so I'm not sure what is going on. How did you go about installing dlib? Did you install dlib via pip, compile it locally, or something else?

[codeundercoverdev]

I did it exactly as described on the face_recognition raspberry pi install page install page:

mkdir -p dlib
git clone -b 'v19.4' --single-branch https://github.com/davisking/dlib.git dlib/
cd ./dlib
sudo python3 setup.py install 

[ageitgey]

Thanks. Since I haven't seen this issue myself, it's hard to know what is going on.

When it happens, is the CPU pegged at 100% or idle? Does this issue still happen if you try processing a very small image (like 100x100 pixels or something) instead of a larger image?

If you are familiar with how to use strace, can you capture a trace from when this happens?

[codeundercoverdev]

I'm using the obama_small image that comes included. I'll try looking at trace

[saebaxp]

Just experienced same segsegv issue.
Raspberrypi: Stretch
dlib: compiled with NEON instructions enabled. version 19.9.99
python 3.5.3
opencv: compiled from source code, v3.3.0

strace: (around the crash)
write(1, "Found 1 faces in image.\n", 24) = 24
mmap2(NULL, 3051520, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x68417000
futex(0x75957ba4, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0x75957ba0, FUTEX_OP_SET<<28|0<<12|FUTEX_OP_CMP_GT<<24|0x1) = 1
futex(0x75957b88, FUTEX_WAKE_PRIVATE, 1) = 1
futex(0x75957c24, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0x75957c20, FUTEX_OP_SET<<28|0<<12|FUTEX_OP_CMP_GT<<24|0x1) = 1
futex(0x75957ca4, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0x75957ca0, FUTEX_OP_SET<<28|0<<12|FUTEX_OP_CMP_GT<<24|0x1) = 1
futex(0x75957c88, FUTEX_WAKE_PRIVATE, 1) = 1
munmap(0x68417000, 3051520) = 0
mmap2(NULL, 1413120, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x685a7000
munmap(0x685a7000, 1413120) = 0
mmap2(NULL, 1413120, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x685a7000
munmap(0x685a7000, 1413120) = 0
mmap2(NULL, 1413120, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x685a7000
munmap(0x685a7000, 1413120) = 0
mmap2(NULL, 1413120, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x685a7000
munmap(0x685a7000, 1413120) = 0
mmap2(NULL, 1413120, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x685a7000
munmap(0x685a7000, 1413120) = 0
mmap2(NULL, 1413120, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x685a7000
munmap(0x685a7000, 1413120) = 0
brk(0x6100000) = 0x6100000
mmap2(NULL, 667648, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x6865d000
munmap(0x6865d000, 667648) = 0
mmap2(NULL, 667648, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x6865d000
munmap(0x6865d000, 667648) = 0
mmap2(NULL, 667648, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x6865d000
munmap(0x6865d000, 667648) = 0
mmap2(NULL, 667648, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x6865d000
munmap(0x6865d000, 667648) = 0
mmap2(NULL, 667648, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x6865d000
munmap(0x6865d000, 667648) = 0
mmap2(NULL, 667648, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x6865d000
munmap(0x6865d000, 667648) = 0
mmap2(NULL, 667648, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x6865d000
munmap(0x6865d000, 667648) = 0
write(1, "I see someone named <Unknown Per"..., 38) = 38
write(1, "Capturing image.\n", 17) = 17
ioctl(4, _IOC(_IOC_WRITE, 0xc4, 0x04, 0x0c), 0x7eb5eb64) = 0
futex(0x6d4913c0, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 1, NULL, 0xffffffff) = -1 EAGAIN (Resource temporarily unavailable)
ioctl(4, _IOC(_IOC_WRITE, 0xc4, 0x04, 0x0c), 0x7eb5ec6c) = 0
ioctl(4, _IOC(_IOC_WRITE, 0xc4, 0x04, 0x0c), 0x7eb5e774) = 0
ioctl(4, _IOC(_IOC_WRITE, 0xc4, 0x04, 0x0c), 0x7eb5e87c) = 0
cacheflush(0x76fcc030, 0x76fcc043, 0, 0x76fcc030, 0x76fcc030) = 0
cacheflush(0x76fcc030, 0x76fcc03c, 0, 0x76fcc030, 0x76fcc030) = 0
ioctl(4, _IOC(_IOC_WRITE, 0xc4, 0x04, 0x0c), 0x7eb5f0bc) = 0
futex(0x6d4913c0, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 1, NULL, 0xffffffff) = 0
ioctl(4, _IOC(_IOC_WRITE, 0xc4, 0x04, 0x0c), 0x7eb5eacc) = 0
ioctl(4, _IOC(_IOC_WRITE, 0xc4, 0x04, 0x0c), 0x7eb5ed5c) = 0
futex(0x6d4913c0, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 1, NULL, 0xffffffff) = 0
futex(0x5b381b0, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 1, {tv_sec=1517142596, tv_nsec=843294000}, 0xffffffff) = 0
ioctl(4, _IOC(_IOC_WRITE, 0xc4, 0x04, 0x0c), 0x7eb5ed5c) = 0
futex(0x6d4913c0, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 1, NULL, 0xffffffff) = 0
ioctl(4, _IOC(_IOC_WRITE, 0xc4, 0x04, 0x0c), 0x7eb5efe4) = 0
futex(0x6d4913c0, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 1, NULL, 0xffffffff) = 0
futex(0x5a386b8, FUTEX_WAKE_PRIVATE, 1) = 1
mmap2(NULL, 929792, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x6861d000
mmap2(NULL, 643072, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x68580000
brk(0x6148000) = 0x6148000
munmap(0x68580000, 643072) = 0
brk(0x6185000) = 0x6185000
brk(0x60c7000) = 0x60c7000
munmap(0x6861d000, 929792) = 0
write(1, "Found 1 faces in image.\n", 24) = 24
mmap2(NULL, 3051520, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x68417000
futex(0x75957ba4, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0x75957ba0, FUTEX_OP_SET<<28|0<<12|FUTEX_OP_CMP_GT<<24|0x1) = 1
futex(0x75957b88, FUTEX_WAKE_PRIVATE, 1) = 1
futex(0x75957c24, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0x75957c20, FUTEX_OP_SET<<28|0<<12|FUTEX_OP_CMP_GT<<24|0x1) = 1
futex(0x75957c08, FUTEX_WAKE_PRIVATE, 1) = 1
futex(0x75957ca4, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0x75957ca0, FUTEX_OP_SET<<28|0<<12|FUTEX_OP_CMP_GT<<24|0x1) = 1
munmap(0x68417000, 3051520) = 0
mmap2(NULL, 1413120, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x685a7000
+++ killed by SIGSEGV +++

[xyG67]

i met the same problem. Do you find the solution?