Hello again everyone,
This is just to note, if someone is interested, that after converting
the second GPU of my GTX690 to K10, the card started transcoding >2
channels at once - managed to put up to 6 channels at once, full HD
mpeg2 at ~18Mb/s per channel. Now there is another problem - the card
freezes the computer if I put > 6 channels - I put a watchdog to reboot
it, but this is not a solution. Theoretically the card has to do about
16 HD channels (240 fps per GPU, 2 GPU's), but it freezes far before.
Investigating.
Thanks, George.
On 2016-02-12 22:24, subscripti...@znet.ca wrote:
Hello again,
My problem is probably coming from the fact that the GTX690 card is
half-converted to a K10 one; one GPU is presented as K10 while the
other forms half GTX690. The driver is likely quite puzzled what this
hardware is and how to drive it. So, next step is to make the GPU 0 to
identify itself as K10, then I shall be able to continue.
Thanks, george.
On 2016-02-12 22:02, subscripti...@znet.ca wrote:
Hello everyone,
Please disregard previous mail; I managed to start two channels on the
same GPU, however it is unreliable - first channel will start every
time, while second may fail or work. Investing. Just for information,
card is:
4:00.0 3D controller: NVIDIA Corporation GK104 [GeForce GTX 690] (rev
a1)
04:00.1 Audio device: NVIDIA Corporation GK104 HDMI Audio Controller
(rev a1)
05:00.0 VGA compatible controller: NVIDIA Corporation GK104GL [Tesla
K10] (rev a1)
05:00.1 Audio device: NVIDIA Corporation GK104 HDMI Audio Controller
(rev a1)
Sorry for the noise,
George.
On 2016-02-12 19:17, subscripti...@znet.ca wrote:
Hello,
I am using an GTX690 unlocked card (equivalent to double K10) to
transcode live mpeg2 to h264 as here:
/usr/local/bin/ffmpeg -i udp://239.255.254.2:1234?overrun_nonfatal=1
-y -c:a copy -c:v nvenc -b:v 4M -profile:v high -preset default
-bufsize 8M -s hd720 -segment_list_flags live -segment_time 4
-segment_format mpeg_ts -gpu 1 -metadata title=RDI
m3u/RDI/stream.m3u8
All is is fine (thanks to Moritz Barsnick from this list for help)
till I transcode only one channel per gpu. If I however send a second
channel to the same gpu (-gpu 1 above), the ffmpeg will refuse to
start.
So, my question is if there is a way to have >1 instance of ffmpeg
using the same GPU at the same time? The GPU's have enough power for
several channels in parallel.
In /dev I have: /dev/nvidia0 /dev/nvidia1 /dev/nvidiactl
/dev/nvidia-uvm
Any suggestion appreciated,
Thanks, George.
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