[FFmpeg-user] BlackMagic multiple capture, BSOD

Thu Jun 5 15:56:01 CEST 2014

----- Original Message ----- 
From: "Roger Pack" <rogerdpack2 at gmail.com>
To: "FFmpeg user questions" <ffmpeg-user at ffmpeg.org>
Sent: Thursday, June 05, 2014 3:06 PM
Subject: Re: [FFmpeg-user] BlackMagic multiple capture, BSOD

> On Tue, Jun 3, 2014 at 12:08 PM, Marton Balint <cus at passwd.hu> wrote:
>
>> On Tue, 3 Jun 2014, Roger Pack wrote:
>>
>>  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.
>>>>
>>>
>> Try stopping/starting only once source at a given time, wait a minute or
>> so before stopping/starting the other, that helped me with FMLE captures 
>> at
>> least...
>>
>>
> What about running them in separate ffmpeg instances, same crash?

Eeh, they are seperate instances :-)
Meanwhile, i thik i've nailed it with the timing trick.
If I start / stop with intervals of 650 Msecs, i managed to do some 3600 
start / stops before i got a BSOD.
Going to increase the number and test again, (the last test took 10 hours) 
to see if that helps.
(and, while i'm at it, set up my computer to be power hungry...)

Bouke

>
>> Regards,
>> Marton
>>
>>
>>
>>>> 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
>>>> %
>>>>
>>>>
>>>>
>>>> ---
>>>> This email is free from viruses and malware because avast! Antivirus
>>>> protection is active.
>>>> http://www.avast.com
>>>>
>>>> _______________________________________________
>>>> ffmpeg-user mailing list
>>>> ffmpeg-user at ffmpeg.org
>>>> http://ffmpeg.org/mailman/listinfo/ffmpeg-user
>>>>
>>>>  _______________________________________________
>>> ffmpeg-user mailing list
>>> ffmpeg-user at ffmpeg.org
>>> http://ffmpeg.org/mailman/listinfo/ffmpeg-user
>>>
>>>  _______________________________________________
>> ffmpeg-user mailing list
>> ffmpeg-user at ffmpeg.org
>> http://ffmpeg.org/mailman/listinfo/ffmpeg-user
>>
> _______________________________________________
> ffmpeg-user mailing list
> ffmpeg-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/ffmpeg-user 

---
This email is free from viruses and malware because avast! Antivirus protection is active.
http://www.avast.com