[FFmpeg-user] Can't make zmq listen on anything but port 5555

Wed Mar 9 14:20:50 EET 2022

On 3/8/22 21:53, Thomas Seilund via ffmpeg-user wrote:
> Hi All
>
> I have an ex where ffmpeg using zmq listens on port 5555. Command is 
> only used to demonstrate opening of local port:
>
> ffmpeg -y -video_size 320x240 -i /dev/video0 -filter_complex 
> "zmq,setpts=PTS-STARTPTS" -c:v libx264 -s 320x240 -r 25 -f mpegts 
> /dev/null
> ffmpeg version N-105723-gfee804f7ed Copyright (c) 2000-2022 the FFmpeg 
> developers
>   built with gcc 10 (Debian 10.2.1-6)
>   configuration: --prefix=/home/pi/ffmpeg_build 
> --extra-cflags=-I/home/pi/ffmpeg_build/include 
> --extra-ldflags=-L/home/pi/ffmpeg_build/lib --extra-libs='-lpthread 
> -lm' --ld=g++ --bindir=/home/pi/bin --enable-gpl --enable-gnutls 
> --enable-libfdk-aac --enable-libfreetype --enable-libx264 
> --enable-libzmq --enable-nonfree
>   libavutil      57. 21.100 / 57. 21.100
>   libavcodec     59. 21.100 / 59. 21.100
>   libavformat    59. 17.102 / 59. 17.102
>   libavdevice    59.  5.100 / 59.  5.100
>   libavfilter     8. 27.100 /  8. 27.100
>   libswscale      6.  5.100 /  6.  5.100
>   libswresample   4.  4.100 /  4.  4.100
>   libpostproc    56.  4.100 / 56.  4.100
> Input #0, video4linux2,v4l2, from '/dev/video0':
>   Duration: N/A, start: 2132.759891, bitrate: 36864 kb/s
>   Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 320x240, 
> 36864 kb/s, 30 fps, 30 tbr, 1000k tbn
> Stream mapping:
>   Stream #0:0 (rawvideo) -> zmq:default
>   setpts:default -> Stream #0:0 (libx264)
> Press [q] to stop, [?] for help
> [libx264 @ 0x55a2375520] using cpu capabilities: ARMv8 NEON
> [libx264 @ 0x55a2375520] profile High 4:2:2, level 1.3, 4:2:2, 8-bit
> Output #0, mpegts, to '/dev/null':
>   Metadata:
>     encoder         : Lavf59.17.102
>   Stream #0:0: Video: h264, yuv422p(tv, progressive), 320x240, q=2-31, 
> 25 fps, 90k tbn
>     Metadata:
>       encoder         : Lavc59.21.100 libx264
>     Side data:
>       cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
> frame=  348 fps= 15 q=-1.0 Lsize=     407kB time=00:00:23.00 bitrate= 
> 144.8kbits/s speed=0.985x
> video:289kB audio:0kB subtitle:0kB other streams:0kB global 
> headers:0kB muxing overhead: 40.876137%
> [libx264 @ 0x55a2375520] frame I:2     Avg QP:20.36  size: 17342
> [libx264 @ 0x55a2375520] frame P:88    Avg QP:21.29  size:  2500
>
>
> I confirm that port 5555 is open using nmap:
>
> nmap 127.0.0.1
> Starting Nmap 7.80 ( https://nmap.org ) at 2022-03-08 21:39 CET
> Nmap scan report for localhost (127.0.0.1)
> Host is up (0.00039s latency).
> Not shown: 997 closed ports
> PORT     STATE SERVICE
> 22/tcp   open  ssh
> 631/tcp  open  ipp
> 5555/tcp open  freeciv
>
>
> I want to run two instances of ffmpeg both using zmq. I guess they 
> have to use separate ports. So I try this to use port 5565. Again, 
> command is only used to demonstrate opening of local port:
>
> ffmpeg -y -video_size 320x240 -i /dev/video0 -filter_complex 
> "zmq=bind_address=tcp\\\://127.0.0.1\\\:5565,setpts=PTS-STARTPTS" -c:v 
> libx264 -s 320x240 -r 25 -f mpegts /dev/null
> ffmpeg version N-105723-gfee804f7ed Copyright (c) 2000-2022 the FFmpeg 
> developers
>   built with gcc 10 (Debian 10.2.1-6)
>   configuration: --prefix=/home/pi/ffmpeg_build 
> --extra-cflags=-I/home/pi/ffmpeg_build/include 
> --extra-ldflags=-L/home/pi/ffmpeg_build/lib --extra-libs='-lpthread 
> -lm' --ld=g++ --bindir=/home/pi/bin --enable-gpl --enable-gnutls 
> --enable-libfdk-aac --enable-libfreetype --enable-libx264 
> --enable-libzmq --enable-nonfree
>   libavutil      57. 21.100 / 57. 21.100
>   libavcodec     59. 21.100 / 59. 21.100
>   libavformat    59. 17.102 / 59. 17.102
>   libavdevice    59.  5.100 / 59.  5.100
>   libavfilter     8. 27.100 /  8. 27.100
>   libswscale      6.  5.100 /  6.  5.100
>   libswresample   4.  4.100 /  4.  4.100
>   libpostproc    56.  4.100 / 56.  4.100
> Input #0, video4linux2,v4l2, from '/dev/video0':
>   Duration: N/A, start: 2210.905629, bitrate: 36864 kb/s
>   Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 320x240, 
> 36864 kb/s, 30 fps, 30 tbr, 1000k tbn
> Stream mapping:
>   Stream #0:0 (rawvideo) -> zmq:default
>   setpts:default -> Stream #0:0 (libx264)
> Press [q] to stop, [?] for help
> [libx264 @ 0x5598bae610] using cpu capabilities: ARMv8 NEON
> [libx264 @ 0x5598bae610] profile High 4:2:2, level 1.3, 4:2:2, 8-bit
> Output #0, mpegts, to '/dev/null':
>   Metadata:
>     encoder         : Lavf59.17.102
>   Stream #0:0: Video: h264, yuv422p(tv, progressive), 320x240, q=2-31, 
> 25 fps, 90k tbn
>     Metadata:
>       encoder         : Lavc59.21.100 libx264
>     Side data:
>       cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
> ^CError writing trailer of /dev/null: Immediate exit requestedtrate= 
> 177.0kbits/s speed=0.505x
> frame=  107 fps= 15 q=-1.0 Lsize=     128kB time=00:00:06.88 bitrate= 
> 152.6kbits/s speed=0.944x
> video:92kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB 
> muxing overhead: 39.860378%
> Error closing file /dev/null: Immediate exit requested
> [libx264 @ 0x5598bae610] frame I:1     Avg QP:21.56  size: 14075
>
>
> To my supprise port 5565 is not opened. I confirm that using nmap:
>
> nmap 127.0.0.1
> Starting Nmap 7.80 ( https://nmap.org ) at 2022-03-08 21:38 CET
> Nmap scan report for localhost (127.0.0.1)
> Host is up (0.00041s latency).
> Not shown: 998 closed ports
> PORT    STATE SERVICE
> 22/tcp  open  ssh
> 631/tcp open  ipp
>
>
> What am I doing wrong?
>
> Thanks in advance
>
> Thomas S
>
> _______________________________________________
> ffmpeg-user mailing list
> ffmpeg-user at ffmpeg.org
> https://ffmpeg.org/mailman/listinfo/ffmpeg-user
>
> To unsubscribe, visit link above, or email
> ffmpeg-user-request at ffmpeg.org with subject "unsubscribe".

I tried again and it seems that I can use port 6666. That is fine with 
me! I don't understand why I can not use port 5565!