On 9/23/15 1:47 PM, Flávio Pontes wrote:
Hi,
I need to stream the 2 inputs from a DeckLink Duo card in FHD.
So far I could compile ffmpeg with decklink support and capture one input
at a time without problems.
When I try to capture from the 2 inputs I start getting the following
message repeatedly on both terminals:
[decklink @ 0x32287e0] Decklink input buffer overrun!
I use these commands in the terminals:
/opt/ffmpeg_build/bin/ffmpeg -f decklink -re -i 'DeckLink SDI (1)@7' -g 90
-s hd1080 -profile:v baseline -pix_fmt yuv420p -preset veryfast -c:v
libx264 -b:v 2000k -bufsize 1400k -minrate 2000k -maxrate 2000k -c:a
libfdk_aac -b:a 96k -threads 4 -f flv rtmp://10.12.20.62/myapp/tvines
/opt/ffmpeg_build/bin/ffmpeg -f decklink -re -i 'DeckLink SDI (2)@7' -g 90
-s hd1080 -profile:v baseline -pix_fmt yuv420p -preset veryfast -c:v
libx264 -b:v 2000k -bufsize 1400k -minrate 2000k -maxrate 2000k -c:a
libfdk_aac -b:a 96k -threads 4 -f flv rtmp://10.12.20.62/myapp/tvescola
I tried many combinations but couldn't get it to work.
I wonder if the input buffer is shared between the 2 inputs.
Is there any way to set an input buffer size independently for each command?
Thx in advance!
Flávio.
My first thought was you are simply not keeping up. Are you positive
your computer can process these two streams at the same time?
I've not tried to capture from a Duo, but I've captured two streams
simultaneously from a Quad using other software. Since you are running
two independent copies of ffmpeg, I don't think there is a shared
internal buffer to increase. Hopefully you will get some more useful
advice from others.
Deron
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