Hi there, I am very very new to this and have a big project to tackle. I am trying to accomplish streaming videos from 4 or more feeds on a local display from a DeckLink Quad 2 using FFmpeg. I can play two different videos (I only have two sources I can use simultaneously at my desk) fine, but struggle with connecting them into a single video if they are both on the DeckLink. The code I have for a two videos running as a .bat in a box of 4 is below..
*ffmpeg -video_size 1280x720 -pixel_format uyvy422 -framerate 60 -vsync > drop -f dshow -rtbufsize 150M -i video="Decklink Video Capture (5)" -i > video="Decklink Video Capture" -i video="Decklink Video Capture (5)" -i > video="Decklink Video Capture" -an -filter_complex "[0:v][1:v]hstack[t]; > [2:v][3:v]hstack[b]; [t][b]vstack" -c:v libx264 -preset ultrafast -f mpegts > pipe: | ffplay pipe: -vf scale=1280:720 \ pause* Full console is below: > > > > > > > > > > > > > > > > > > > > > > > > * ffmpeg -video_size 1280x720 -pixel_format uyvy422 -framerate 60 -vsync > drop -f dshow -rtbufsize 150M -i video="Decklink Video Capture (5)" -i > video="Decklink Video Capture" -i video="Decklink Video Capture (5)" -i > video="Decklink Video Capture" -an -filter_complex "[0:v][1:v]hstack[t]; > [2:v][3:v]hstack[b]; [t][b]vstack" -c:v libx264 -preset ultrafast -f mpegts > pipe: | ffplay pipe: -vf scale=1280:720ffmpeg version N-91024-g293a6e8332 > Copyright (c) 2000-2018 the FFmpeg developers built with gcc 7.3.0 (GCC) > configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-bzlib > --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass > --enable-libbluray --enable-libfreetype --enable-libmp3lame > --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg > --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr > --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack > --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 > --enable-libzimg --enable-lzma --enable-zlib --enable-gmp > --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc > --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom > --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid > --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 > --enable-avisynth libavutil 56. 18.100 / 56. 18.100 libavcodec > 58. 19.101 / 58. 19.101 libavformat 58. 13.102 / 58. 13.102 > libavdevice 58. 4.100 / 58. 4.100 libavfilter 7. 21.100 / 7. > 21.100ffplay version N-91024-g293a6e8332 Copyright (c) 2003-2018 the FFmpeg > developers libswscale 5. 2.100 / 5. 2.100 built with gcc 7.3.0 > (GCC) libswresample 3. 2.100 / 3. 2.100 configuration: --enable-gpl > --enable-version3 --enable-sdl2 --enable-bzlib --enable-fontconfig > --enable-gnutls --enable-iconv --enable-libass --enable-libbluray > --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb > --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus > --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora > --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp > --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg > --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab > --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa > --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx > --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va > --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth libavutil > 56. 18.100 / 56. 18.100 libpostproc 55. 2.100 / 55. 2.100 > libavcodec 58. 19.101 / 58. 19.101 libavformat 58. 13.102 / 58. > 13.102 libavdevice 58. 4.100 / 58. 4.100 libavfilter 7. 21.100 > / 7. 21.100 libswscale 5. 2.100 / 5. 2.100 libswresample 3. > 2.100 / 3. 2.100 libpostproc 55. 2.100 / 55. 2.100Input #0, dshow, > from 'video=Decklink Video Capture (5)':0B f=0/0 Duration: N/A, start: > 0.140463, bitrate: N/A Stream #0:0: Video: rawvideo (HDYC / 0x43594448), > uyvy422(tv), 1280x720, 60 fps, 60 tbr, 10000k tbn, 10000k tbcvideo=Decklink > Video Capture: No such file or directorypipe:: Invalid data found when > processing inputKB sq= 0B f=0/0* And that stream works running on its own too. So my optimistic concern is just that I'm using the wrong naming scheme; my only other idea is that I can't read two streams from the DeckLink card simultaneously (though I feel like I've read I can). Another concern is introduced here too: one of my streams does not run with frame rate set to 60fps, I need to set it to 59.94fps to work, otherwise it is a black screen. Would I need to split these into multiple processed to run each stream simultaneously, save them to a temporary file or a pipeline, then combine them in another stream to display? I am concerned about the latency that program would introduce though. Thank you in advance! Robert _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
