[FFmpeg-user] BlackMagic multiple capture, BSOD

[Roger Pack]

I think I've heard of this before and thought it was buggy BM drivers...do
other capture devices  handle multiple at the same time?


On Tue, Jun 3, 2014 at 10:36 AM, Bouke (VideoToolShed) <
bouke at videotoolshed.com> wrote:

> Trying to do multiple instances capturing from BM cards.
> (Got a decklink Quad and a decklink Studio, doing 5 at a time)
> HP Z420, with multithreading enabled (12 cores) Win7 64 bit / 16 gig ram
>
> It sorta kinda works, but every now and then (about after some 14 start /
> stops) i get a blue screen of death.
>
> disabling multithreading gives a slightly better performance, but still
> BSOD on the most weird moments...
> (on deleting files after some capture attempts)
>
> Anyone got something like this working? Any hints on the secret handshake?
> (Compatible hardware, settings, driver versions?)
>
> Most simple commands (but then i run 5 of these at the same time) below.
>
> Thx,
> Bouke
>
> C:\Users\Bouke>C:\Users\Bouke\Desktop\BMtest\xtras\ffmpeg.exe -f dshow
> -rtbufsiz
> e 1024000k -pixel_format uyvy422 -framerate 25 -s 1920:1080 -re -i
> video="Deckli
> nk Video Capture":audio="Decklink Audio Capture" -i
> C:\Users\Bouke\Desktop\BMtes
> t\slate.png -filter_complex "overlay=enable='lte(t,2)'" -b:v 6M -vcodec
> mpeg2vid
> eo -pix_fmt yuv422p -acodec mp2 -s 960x540 -aspect 16:9 -f tee -map 0:v
> -map 0:a
>  "[f=mpegts]udp://192.168.1.61:1231"
> ffmpeg version N-60087-g94a5241 Copyright (c) 2000-2014 the FFmpeg
> developers
>  built on Jan 21 2014 22:06:13 with gcc 4.8.2 (GCC)
>  configuration: --enable-gpl --enable-version3 --disable-w32threads
> --enable-av
> isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls
> --enab
> le-iconv --enable-libass --enable-libbluray --enable-libcaca
> --enable-libfreetyp
> e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame
> --ena
> ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
> --enable-l
> ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr
> --enable-libsp
> eex --enable-libtheora --enable-libtwolame --enable-libvidstab
> --enable-libvo-aa
> cenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx
> --enable-libwavp
> ack --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
>  libavutil      52. 63.100 / 52. 63.100
>  libavcodec     55. 48.102 / 55. 48.102
>  libavformat    55. 25.101 / 55. 25.101
>  libavdevice    55.  5.102 / 55.  5.102
>  libavfilter     4.  1.100 /  4.  1.100
>  libswscale      2.  5.101 /  2.  5.101
>  libswresample   0. 17.104 /  0. 17.104
>  libpostproc    52.  3.100 / 52.  3.100
> Guessed Channel Layout for  Input Stream #0.1 : stereo
> Input #0, dshow, from 'video=Decklink Video Capture:audio=Decklink Audio
> Capture
> ':
>  Duration: N/A, start: 0.089250, bitrate: 1536 kb/s
>    Stream #0:0: Video: rawvideo (UYVY / 0x59565955), uyvy422(tv),
> 1920x1080, 25
> tbr, 10000k tbn, 25 tbc
>    Stream #0:1: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
> Input #1, image2, from 'C:\Users\Bouke\Desktop\BMtest\slate.png':
>  Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
>    Stream #1:0: Video: png, rgba, 1920x1080, 25 tbr, 25 tbn, 25 tbc
> Output #0, tee, to '[f=mpegts]udp://192.168.1.61:1231':
>  Metadata:
>    encoder         : Lavf55.25.101
>    Stream #0:0: Video: mpeg2video, yuv422p, 960x540 [SAR 1:1 DAR 16:9],
> q=2-31,
> 6000 kb/s, 90k tbn, 25 tbc (default)
>    Stream #0:1: Audio: mp2, 48000 Hz, stereo, s16, 128 kb/s
> Stream mapping:
>  Stream #0:0 (rawvideo) -> overlay:main (graph 0)
>  Stream #1:0 (png) -> overlay:overlay (graph 0)
>  overlay (graph 0) -> Stream #0:0 (mpeg2video)
>  Stream #0:1 -> #0:1 (pcm_s16le -> mp2)
> Press [q] to stop, [?] for help
> frame=   70 fps= 25 q=2.0 Lsize=N/A time=00:00:02.78 bitrate=N/A
> video:118kB audio:44kB subtitle:0 global headers:0kB muxing overhead
> -100.013287
> %
>
>
>
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