[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
Mon Apr 8 21:56:52 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 |
-------------------------------------+-------------------------------------
Changes (by malakudi):
* status: closed => reopened
* resolution: needs_more_info =>
Comment:
I confirm the issue reported in this ticket with current git. Running
multiple transcoding instances (above 50) starts to have a big performance
degredation.
With the following patch on current git
{{{
--- ffmpeg/libavcodec/nvenc.c 2019-04-08 20:53:19.745925070 +0300
+++ ffmpeg/libavcodec/nvenc.c 2019-04-08 20:55:51.619074973 +0300
@@ -1846,13 +1846,6 @@
res = nvenc_print_error(avctx, nv_status, "Failed
unmapping input resource");
goto error;
}
- nv_status = p_nvenc->nvEncUnregisterResource(ctx->nvencoder,
ctx->registered_frames[tmpoutsurf->reg_idx].regptr);
- if (nv_status != NV_ENC_SUCCESS) {
- res = nvenc_print_error(avctx, nv_status, "Failed
unregistering input resource");
- goto error;
- }
- ctx->registered_frames[tmpoutsurf->reg_idx].ptr = NULL;
- ctx->registered_frames[tmpoutsurf->reg_idx].regptr = NULL;
} else if (ctx->registered_frames[tmpoutsurf->reg_idx].mapped <
0) {
res = AVERROR_BUG;
goto error;
}}}
the issue is resolved. I am not in a position to understand why this patch
fixes the issue, but it does. And I see no other problem (mem leak or
something else) when applying above patch.
The issue affects nvenc in general, it is not related to mpeg-2 input that
original author reported.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/7674#comment:17>
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