src/tcmalloc.cc:284] Attempt to free invalid pointer 0x7ff4821267d0 caffe VideoCapture Mac

Mac同时调用cap = cv2.VideoCapture(0)和caffe出现src/tcmalloc.cc:284] Attempt to free invalid pointer 0x7ff4821267d0的问题解决

import cv2
def test():
cap = cv2.VideoCapture(0)
ret,frame = cap.read()
print ret
cap.release()
import caffe

出现错误:

src/tcmalloc.cc:284] Attempt to free invalid pointer 0x7ff4821267d0

而ubuntu下运行良好无错误。

解决办法：

将

import caffe

放在顶部导入

import caffe
import cv2
def test():
cap = cv2.VideoCapture(0)
ret,frame = cap.read()
print ret
cap.release()

成功

解决过程记录：

import threading as th
def test():
cap = cv2.VideoCapture(0)
ret, frame = cap.read()
print ret
#cap.release()
def test2():
import caffe
t1 = th.Thread(target = test)
t2 = th.Thread(target = test2)
t1.start()
t1.join()
t2.start()
t2.join()

运行错误，输出

src/tcmalloc.cc:284] Attempt to free invalid pointer 0x7f9847fdd240
[Finished in 1.8s with exit code -6]
[shell_cmd: python -u "/Users/eclipsycn/Documents/caffe/ssd-face/testCapture.py"]
[dir: /Users/eclipsycn/Documents/caffe/ssd-face]
[path: /usr/local/opt/qt/bin:/Users/eclipsycn/anaconda2/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/Applications/VMware Fusion.app/Contents/Public]

调换t1与t2顺序，

import threading as th
def test():
cap = cv2.VideoCapture(0)
ret, frame = cap.read()
print ret
#cap.release()
def test2():
import caffe
t1 = th.Thread(target = test)
t2 = th.Thread(target = test2)
t2.start()
t2.join()
t1.start()
t1.join()

成功

单独调用ssd-caffe-face，crop人脸过程没问题，说明不是caffe问题，而单独使用identi也可以运行，identi加VideoCapture也可以运行，尝试注释掉plt，其实没效果。

可能由于调用摄像头后与caffe的cpu冲突？

在中途测试时还出现

no module named LabelMap

怀疑是caffe导入混乱

说明只是调用顺序问题，而怎样引起的这种冲突不明确。

mac调用摄像头 如果只有mac自带摄像头，则VideoCapture(0)，如果接usb摄像头，usb摄像头序号为0，而自带摄像头序号为1.

mbp2017，i5 3.1Ghz，SSD-FACE的face detection接vgg16的face identification模型，19张运行39s，大约2s一张。