[FFmpeg-trac] #7674(undetermined:reopened): ffmpeg with cuvid transcoding after version 3.4.1 work unstable on heavy load CUDA card
FFmpeg
trac at avcodec.org
Thu Apr 25 15:52:28 EEST 2019
#7674: ffmpeg with cuvid transcoding after version 3.4.1 work unstable on heavy
load CUDA card
-------------------------------------+-------------------------------------
Reporter: maxfs79 | Owner:
Type: defect | Status: reopened
Priority: normal | Component:
| undetermined
Version: unspecified | Resolution:
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Comment (by malakudi):
I have put some debug info to check what is going on when this code is
executed. For every processed frame, code calls nvEncUnregisterResource.
For my test example of 2984 frames, code is executed 2984 times.
{{{
/testnvidia4.sh 0 1
[h264_nvenc @ 0x562ba7c98e80] DEBUG: Unmapped, need(?) to unregister
Last message repeated 2983 times13568kB time=00:00:47.01
bitrate=2364.1kbits/s speed=31.3x
frame= 2984 fps=1542 q=27.0 Lsize= 18214kB time=00:01:01.56
bitrate=2423.8kbits/s speed=31.8x
}}}
Obviously, when running multiple encodes, doing thousands calls of
nvEncUnregisterResource creates the performance issue.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/7674#comment:21>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
More information about the FFmpeg-trac
mailing list