[FFmpeg-user] Streaming a static image fails

[Deon Stoltz]

I need to stream a static image with information on a network to Tv's.

ffmpeg does convert the image to a transport stream but VLC refuse to 
play it as well the TV's. ffplay does play it but complains about 
invalid frame dimensions. I therefore added the frame size but it has no 
effect. Note that the error is still reported in ffplay.

  I upgraded to the latest version of ffmpeg (compiled in a subdir 
because  Mint version is old and the .deb file did not want to install). 
Any idea what could be the reason?

Cmd used:

./ffmpeg -y -stream_loop -1 -r 25/1  -i text2.png  -f mpegts -s 800x600  
udp://239.1.250.12:1234
ffmpeg version N-115265-g7e59f02c14 Copyright (c) 2000-2024 the FFmpeg 
developers
   built with gcc 11 (Ubuntu 11.4.0-1ubuntu1~22.04)
   configuration:
   libavutil      59. 17.100 / 59. 17.100
   libavcodec     61.  5.104 / 61.  5.104
   libavformat    61.  3.103 / 61.  3.103
   libavdevice    61.  2.100 / 61.  2.100
   libavfilter    10.  2.101 / 10.  2.101
   libswscale      8.  2.100 /  8.  2.100
   libswresample   5.  2.100 /  5.  2.100
Input #0, png_pipe, from 'text2.png':
   Duration: N/A, bitrate: N/A
   Stream #0:0: Video: png, pal8(pc, gbr/unknown/unknown), 800x600 [SAR 
3780:3780 DAR 4:3], 25 fps, 25 tbr, 25 tbn
Stream mapping:
   Stream #0:0 -> #0:0 (png (native) -> mpeg2video (native))
Press [q] to stop, [?] for help
Output #0, mpegts, to 'udp://239.1.250.12:1234':
   Metadata:
     encoder         : Lavf61.3.103
   Stream #0:0: Video: mpeg2video (Main), yuv420p(progressive), 800x600 
[SAR 1:1 DAR 4:3], q=2-31, 200 kb/s, 25 fps, 90k tbn
       Metadata:
         encoder         : Lavc61.5.104 mpeg2video
       Side data:
         cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: N/A
[out#0/mpegts @ 0x557c16e53ac0] video:48400KiB audio:0KiB subtitle:0KiB 
other streams:0KiB global headers:0KiB muxing overhead: 15.095825%
frame=20140 fps=1059 q=31.0 Lsize=   55707KiB time=00:13:25.56 bitrate= 
566.5kbits/s speed=42.4x
Exiting normally, received signal 2.

Receiving side:

ffplay udp://239.1.250.12:1234
ffplay version 4.4.2-0ubuntu0.22.04.1 Copyright (c) 2003-2021 the FFmpeg 
developers
   built with gcc 11 (Ubuntu 11.2.0-19ubuntu1)
   configuration: --prefix=/usr --extra-version=0ubuntu0.22.04.1 
--toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu 
--incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl 
--disable-stripping --enable-gnutls --enable-ladspa --enable-libaom 
--enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca 
--enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libflite 
--enable-libfontconfig --enable-libfreetype --enable-libfribidi 
--enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame 
--enable-libmysofa --enable-libopenjpeg --enable-libopenmpt 
--enable-libopus --enable-libpulse --enable-librabbitmq 
--enable-librubberband --enable-libshine --enable-libsnappy 
--enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh 
--enable-libtheora --enable-libtwolame --enable-libvidstab 
--enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx265 
--enable-libxml2 --enable-libxvid --enable-libzimg --enable-libzmq 
--enable-libzvbi --enable-lv2 --enable-omx --enable-openal 
--enable-opencl --enable-opengl --enable-sdl2 --enable-pocketsphinx 
--enable-librsvg --enable-libmfx --enable-libdc1394 --enable-libdrm 
--enable-libiec61883 --enable-chromaprint --enable-frei0r 
--enable-libx264 --enable-shared
   libavutil      56. 70.100 / 56. 70.100
   libavcodec     58.134.100 / 58.134.100
   libavformat    58. 76.100 / 58. 76.100
   libavdevice    58. 13.100 / 58. 13.100
   libavfilter     7.110.100 /  7.110.100
   libswscale      5.  9.100 /  5.  9.100
   libswresample   3.  9.100 /  3.  9.100
   libpostproc    55.  9.100 / 55.  9.100
[mpeg2video @ 0x7f77d8029e40] Invalid frame dimensions 0x0. f=0/0
[mpeg2video @ 0x7f77d8029e40] Invalid frame dimensions 0x0. f=0/0
     Last message repeated 3 times
Input #0, mpegts, from 'udp://239.1.250.12:1234': sq=    0B f=0/0
   Duration: N/A, start: 6196.600000, bitrate: N/A
   Program 1
     Metadata:
       service_name    : Service01
       service_provider: FFmpeg
   Stream #0:0[0x100]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), 
yuv420p(tv, progressive), 800x600 [SAR 1:1 DAR 4:3], 25 fps, 25 tbr, 90k 
tbn, 50 tbc
     Side data:
       cpb: bitrate max/min/avg: 0/0/0 buffer size: 49152 vbv_delay: N/A

Any help appreciated.