#10964: tf_level 4 Defect
-------------------------------------+-------------------------------------
Reporter: Jigsawbg | Owner: (none)
Type: defect | Status: new
Priority: important | Component:
| undetermined
Version: git-master | Resolution:
Keywords: | Blocked By:
Blocking: | Reproduced by developer: 0
Analyzed by developer: 0 |
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Description changed by Jigsawbg:
Old description:
> When using the following settings for hevc_nvenc:
> -tune 5
> -tf_level 4
> -lookahead_level 15
> The output file is reported as "isTruncated" in MediaInfo. The usual
> statistics(-stats) after the end of encoding are not displayed. It seems
> that shortly before it finishes encoding ffmpeg crashes silently. In the
> log file generated by -report the encoding appears incomplete.
>
> With -tf_level 0 , everything seems fine.
>
> The problem also exists in version ffmpeg-git-full 2024-04-15-git-
> 5e380bcdb1.
>
> I'm on Windows 10 pro 22H2 OS build 19045.4291
> Nvidia RTX 3060Ti Founders Edition
> Driver 551.86
New description:
When using the following settings for hevc_nvenc:
-tune 5
-tf_level 4
-lookahead_level 15
The output file is reported as "isTruncated" in MediaInfo. The usual
statistics(-stats) after the end of encoding are not displayed. It seems
that shortly before it finishes encoding ffmpeg crashes silently. In the
log file generated by -report the encoding appears incomplete.
With -tf_level 0 , everything seems fine.
The problem also exists in version ffmpeg-git-full 2024-04-15-git-
5e380bcdb1.
Update:
Actually, the problem is not in tf_level 4 per se. The problem occurs when
I use:
-hwaccel cuda -hwaccel_output_format cuda or -hwaccel cuda or -hwaccel
nvdec or -hwaccel dxva2 or hwaccel auto. . . I tested with these.
If I use -c:v h264_cuvid then no problem.
This is enough to recreate the problem:
{{{
ffmpeg.exe -hwaccel auto -i input.m2ts -map 0:v:0 -c:v hevc_nvenc -bf 4
-tf_level 4 output.mkv
}}}
That's how it works:
{{{
ffmpeg.exe -c:v h264_cuvid -i input.m2ts -map 0:v:0 -c:v hevc_nvenc -bf 4
-tf_level 4 output.mkv
}}}
I'm on Windows 10 pro 22H2 OS build 19045.4291
Nvidia RTX 3060Ti Founders Edition
Driver 551.86
--
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Ticket URL: <https://trac.ffmpeg.org/ticket/10964#comment:2>
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