/dev/video4 always causes munmap_chunk(): Invalid Pointer error
I am trying to record 7 webcams simultaneously. All of these webcams are Logitech c920. No matter which device is mapped to /dev/video* the device connected to /dev/video4 always gives an error. The video that's recorded is blank. All other cameras are working fine. I am totally clueless as to what is happening here, here is the memory dump:
*** Error in `guvcview': munmap_chunk(): invalid pointer: 0x00007f38f6ef0010 ***
======= Backtrace: =========
/lib/x86_
/lib/x86_
/usr/lib/
/usr/lib/
/usr/lib/
guvcview[0x409610]
guvcview(
/lib/x86_
guvcview[0x409099]
======= Memory map: ========
00400000-00424000 r-xp 00000000 08:11 12069749 /usr/bin/guvcview
00623000-00624000 r--p 00023000 08:11 12069749 /usr/bin/guvcview
00624000-00626000 rw-p 00024000 08:11 12069749 /usr/bin/guvcview
01791000-01901000 rw-p 00000000 00:00 0 [heap]
7f38db542000-
7f38e8000000-
7f38e8021000-
7f38ec02b000-
7f38f0000000-
7f38f00a2000-
7f38f4009000-
7f38f4a27000-
7f38f4a28000-
7f38f5228000-
7f38f5229000-
7f38f5a29000-
7f38f5e1e000-
7f38f6213000-
7f38f6608000-
7f38f69fd000-
7f38f70eb000-
7f38f70ec000-
7f38f78ec000-
7f38f7bb5000-
7f38f7bc7000-
7f38f7dc7000-
7f38f7dc8000-
....
....
....
7f390ddb2000-
7f390ddc7000-
7f390ddc8000-
7f390ddcf000-
7f390ddd1000-
7f390ddd2000-
7f390ddd3000-
7ffea3510000-
7ffea35a2000-
7ffea35a4000-
ffffffffff60000
I am using guvcview something like this:
guvcview \
--device=$i \
--fps=30 \
--gui=none \
>> $OUT/$FILE.log 2>&1
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This question was reopened
- by Whizzzkid