2024년 5월 21일 (화) 오전 1:26, Deon Stoltz <[email protected]>님이 작성: > > 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. > After a few search, I found the solution. First, according to https://superuser.com/questions/1361198/vlc-3-can-not-play-certain-udp-streams, you should make udp packets with size 1316, by setting the address udp:// 239.1.250.12:1234?pkt_size=1316 Second, vlc should play udp://@239.1.250.12:1234. Without the @, vlc won't succeed to play the stream. Hope these help you. Kim Syehoon > _______________________________________________ > ffmpeg-user mailing list > [email protected] > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > [email protected] with subject "unsubscribe". _______________________________________________ ffmpeg-user mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-user
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