#7674: ffmpeg with cuvid transcoding after version 3.4.1 work unstable on heavy
load CUDA card
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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 |
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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.
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Ticket URL: <https://trac.ffmpeg.org/ticket/7674#comment:21>
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