#8955: ffplay, zmq example doesn't work -------------------------------------+------------------------------------- Reporter: mkoch | Type: defect Status: new | Priority: normal Component: ffplay | Version: git- | master Keywords: zmq example | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | -------------------------------------+------------------------------------- This command line is given as an example in the official documentation of the zmq filter. https://www.ffmpeg.org/ffmpeg-all.html#zmq_002c-azmq ffplay -dumpgraph 1 -f lavfi "color=s=100x100:c=red[l];color=s=100x100:c=blue[r];nullsrc=s=200x100,zmq[bg];[bg][l]overlay[bg+l];[bg+l][r]overlay at my=x=100" The problem is that ffplay exits after 1-5 seconds (or sometimes even longer) without any error message, and without showing the output window. I'm not sending any commands to the zmq filter. Known workaround: Change the size of nullsrc to 400x200, then it works. C:\Users\astro\Desktop>c:\ffmpeg\ffplay -dumpgraph 1 -f lavfi "color=s=100x100:c=red[l];color=s=100x100:c=blue[r];nullsrc=s=200x100,zmq[bg];[bg][l]overlay[bg+l];[bg+l][r]overlay at my=x=100" ffplay version 2020-10-21-git-289e964873-essentials_build-www.gyan.dev Copyright (c) 2003-2020 the FFmpeg developers built with gcc 10.2.0 (Rev3, Built by MSYS2 project) configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma --enable-zlib --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-sdl2 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-libass --enable-libfreetype --enable-libfribidi --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-libgme --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libtheora --enable-libvo-amrwbenc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-librubberband libavutil 56. 60.100 / 56. 60.100 libavcodec 58.111.101 / 58.111.101 libavformat 58. 62.100 / 58. 62.100 libavdevice 58. 11.102 / 58. 11.102 libavfilter 7. 88.100 / 7. 88.100 libswscale 5. 8.100 / 5. 8.100 libswresample 3. 8.100 / 3. 8.100 libpostproc 55. 8.100 / 55. 8.100 +----------------+0 fd= 0 aq= 0KB vq= 0KB sq= 0B f=0/0 | Parsed_color_0 |default--[100x100 1:1 yuva420p]--Parsed_overlay_4:overlay | (color) | +----------------+ +----------------+ | Parsed_color_1 |default--[100x100 1:1 yuva420p]--overlay at my:overlay | (color) | +----------------+ +------------------+ | Parsed_nullsrc_2 |default--[200x100 1:1 yuva420p]--Parsed_zmq_3:default | (nullsrc) | +------------------+ +--------------+ Parsed_nullsrc_2:default--[200x100 1:1 yuva420p]--default| Parsed_zmq_3 |default--[200x100 1:1 yuva420p]--Parsed_overlay_4:main | (zmq) | +--------------+ +------------------+ Parsed_zmq_3:default----[200x100 1:1 yuva420p]-----main| Parsed_overlay_4 |default--[200x100 1:1 yuva420p]--overlay at my:main Parsed_color_0:default--[100x100 1:1 yuva420p]--overlay| (overlay) | +------------------+ +------------+ Parsed_overlay_4:default--[200x100 1:1 yuva420p]-----main| overlay at my |default--[200x100 1:1 yuva420p]--out:default Parsed_color_1:default----[100x100 1:1 yuva420p]--overlay| (overlay) | +------------+ +--------------+ overlay at my:default--[200x100 1:1 yuva420p]--default| out | | (buffersink) | +--------------+ Input #0, lavfi, from 'color=s=100x100:c=red[l];color=s=100x100:c=blue[r];nullsrc=s=200x100,zmq[bg];[bg][l]overlay[bg+l];[bg+l][r]overlay at my=x=100': Duration: N/A, start: 0.000000, bitrate: N/A Stream #0:0: Video: rawvideo (Y4[11][8] / 0x80B3459), yuva420p, 200x100 [SAR 1:1 DAR 2:1], 25 tbr, 25 tbn, 25 tbc -- Ticket URL: <https://trac.ffmpeg.org/ticket/8955> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker