Good day,
I have the same error and think I can provide the needed information,
I’m running running Ubuntu 16.04 desktop
Intel Core Duo CPU E7500 @ 2.93GHz
4 Gigs Ram
Zoneminder 1.30.4 updated from ppa:iconnor/zoneminder-1.32
1.32.2 and then to 1.32.3 all updates were done by ppa and a little forum searching
Cameras = 3: 1st is iCamera-1000
Ffmpeg rtsp://10.0.0.34:1024/img/media.sav TCP
From VLC: Video Codec: H264 - MPEG-4 AVC (part 10) (h264)
Audio Codec: G.726 ADPCM Audio (g726)
Camera 2: Kkmoon 801,
Ffmpeg rtsp://user:pass@10.0.0.40:554/11 TCP
From VLC: Codec: H264 - MPEG-4 AVC (part 10) (h264)
Audio Codec: PCM ALAW (alaw)
Camera 3: PLC
Ffmpeg rtsp://10.0.0.129:554/onvif1 UDP
From VLC: Codec: H264 - MPEG-4 AVC (part 10) (h264)
Audio Codec: PCM ALAW (alaw)
Errors from log ,,
2018-12-20 17:01:31 zmc_m1 9551 WAR /build/zoneminder-59iecC/zoneminder- 1.32.3/src/zm_videostore.cpp:836: Writing frame [av_interleaved_write_frame()] failed: Operation not permitted(-1) zm_videostore.cpp 836
2018-12-20 17:01:30 zmc_m1 9551 WAR /build/zoneminder-59iecC/zoneminder-1.32.3/src/zm_videostore.cpp:836: Writing frame [av_interleaved_write_frame()] failed: Operation not permitted(-1) zm_videostore.cpp 836
2018-12-20 17:01:29 zmc_m1 9551 ERR Error writing audio frame packet: Operation not permitted zm_videostore.cpp
10702018-12-20 17:01:29 zmc_m1 9551 ERR Error writing audio frame packet: Operation not permitted zm_videostore.cpp 1070
All cameras work with clean install of zoneminder 1.32.3 on test box
Thanks!