[FFmpeg-user] Nvenc transcode on GTX690 with >1 channel per GPU

[Subscriptions@znet.ca]

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, Subscriptions at 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, Subscriptions at 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, Subscriptions at 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.
>>> 
>>> 
>>> 
>>> _______________________________________________
>>> 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