[FFmpeg-user] How to send sequence of PNG files over network for ffmpeg to render?

[DopeLabs]

heres a 1 liner for you..


scp /full/path/to/images/*.png ubuntu at ip-10-0-0-196:/full/path/to/images/ && ssh ubuntu at ip-10-0-0-196 'ffmpeg -pattern_type glob -r 60 -i /full/path/to/images/*.png -c:v libvpx-vp9 -pix_fmt yuva420p ffmpeg.webm'



> On Jul 23, 2018, at 11:12 12PM, Andrew Stuart <andrew.stuart at supercoders.com.au> wrote:
> 
>>> My goal is for ffmpeg to be running and listening on a network port, then from another machine to send the PNG sequence over the network directly into ffmpeg, and have the resulting video file saved.
> 
>>> So I need to work out how to configure ffmpeg to listen on the network for a sequence of PNG files, and I need to work out how to, from another machine, connect to ffmpeg, tell it what the output filename should be, and then transmit the PNG files.
> 
>>> Is there any way to do this?  Despite many hours research I can’t see if this is actually possible or not.
> 
> I’ll answer my own question as I worked it out eventually - maybe it will help someone else in the future.
> 
> The following command sets up ffmpeg to listen on a socket on port 8000, and when PNG images arrive, ffmpeg processes them.
> 
> ffmpeg -loglevel debug -framerate 60 -f image2pipe -i tcp://127.0.0.1:8000?listen=1 -c:v libvpx-vp9 -pix_fmt yuva420p ffmpeg.webm
> 
> You can test it with this Python script which reads all the png files from a directory and sends them to the socket, resulting in ffmpeg running its render and exiting.
> 
> import glob
> path = '/home/ubuntu/tmp/*.png'
> files=glob.glob(path)
> import socket
> 
> TCP_IP = '127.0.0.1'
> TCP_PORT =8000
> BUFFER_SIZE = 1024
> 
> s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
> s.connect((TCP_IP, TCP_PORT))
> print('connection closed')
> for file in files:
>    f = open(file, 'rb')
>    s.send(f.read())
>    f.close()
> s.close()
> 
> 
> 
> With the resulting output:
> 
> ubuntu at ip-10-0-0-196:~$ ffmpeg -y -framerate 60 -f image2pipe -i tcp://127.0.0.1:8000?listen=1 -c:v libvpx-vp9 -pix_fmt yuva420p ffmpeg.webm
> ffmpeg version 2.8.14-0ubuntu0.16.04.1 Copyright (c) 2000-2018 the FFmpeg developers
>  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.9) 20160609
>  configuration: --prefix=/usr --extra-version=0ubuntu0.16.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl --enable-shared --disable-stripping --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-libx264 --enable-libopencv
>  libavutil      54. 31.100 / 54. 31.100
>  libavcodec     56. 60.100 / 56. 60.100
>  libavformat    56. 40.101 / 56. 40.101
>  libavdevice    56.  4.100 / 56.  4.100
>  libavfilter     5. 40.101 /  5. 40.101
>  libavresample   2.  1.  0 /  2.  1.  0
>  libswscale      3.  1.101 /  3.  1.101
>  libswresample   1.  2.101 /  1.  2.101
>  libpostproc    53.  3.100 / 53.  3.100
> Input #0, image2pipe, from 'tcp://127.0.0.1:8000?listen=1':
>  Duration: N/A, bitrate: N/A
>    Stream #0:0: Video: png, rgba(pc), 800x600, 60 fps, 60 tbr, 60 tbn, 60 tbc
> Incompatible pixel format 'yuva420p' for codec 'libvpx-vp9', auto-selecting format 'yuv420p'
> [libvpx-vp9 @ 0x2428e00] v1.5.0
> Output #0, webm, to 'ffmpeg.webm':
>  Metadata:
>    encoder         : Lavf56.40.101
>    Stream #0:0: Video: vp9 (libvpx-vp9), yuv420p, 800x600, q=-1--1, 200 kb/s, 60 fps, 1k tbn, 60 tbc
>    Metadata:
>      encoder         : Lavc56.60.100 libvpx-vp9
> Stream mapping:
>  Stream #0:0 -> #0:0 (png (native) -> vp9 (libvpx-vp9))
> Press [q] to stop, [?] for help
> [png @ 0x237e840] Invalid PNG signature 0xBA775E7E29DE8950.bitrate= 247.0kbits/s
> Error while decoding stream #0:0: Invalid data found when processing input
> frame=   98 fps= 18 q=0.0 Lsize=      42kB time=00:00:01.64 bitrate= 208.8kbits/s
> video:41kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.742833%
> ubuntu at ip-10-0-0-196:~$
> 
> 
> 
> 
> 
> _______________________________________________
> ffmpeg-user mailing list
> ffmpeg-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/ffmpeg-user
> 
> To unsubscribe, visit link above, or email
> ffmpeg-user-request at ffmpeg.org with subject "unsubscribe".