ffmpeg and hevc_nvenc?

asarian · 6th July 2021, 14:00

I decided to give hevc_nvenc a try once, using ffmpeg, on a H264 stream:

Code:

ffmpeg -i test.mp4 -c:v hevc_nvenc -pix_fmt yuv420p -preset p7 -tune hq -rc:v vbr -cq:v 10 -b:v 0 -profile:v main -rc-lookahead:v 32 g:\video\test.hevc

ffmpeg reports no errors, but simply exits like after 11 frames or so. What am I missing here?

Selur · 6th July 2021, 17:10

Have you tried using a higher loglevel to see why ffmpeg exits?

frank · 16th July 2021, 11:40

Code:

ffmpeg.exe -c:v h264_cuvid -i test.mp4 -c:v hevc_nvenc ...

asarian · 19th July 2021, 08:08

Quote:

Originally Posted by frank

Code:

ffmpeg.exe -c:v h264_cuvid -i test.mp4 -c:v hevc_nvenc ...

Thx. Looks like I forgot the decoder part.

Balling · 16th September 2021, 09:57

No, you can use SW decoder. This looks like another bug. Sigh.

As for cuvid part those are really old.

Use -hwaccel cuda -hwaccel_format cuda

6th July 2021, 14:00	#1 \| Link
asarian Registered User Join Date: May 2005 Posts: 1,462	ffmpeg and hevc_nvenc? I decided to give hevc_nvenc a try once, using ffmpeg, on a H264 stream: Code: ffmpeg -i test.mp4 -c:v hevc_nvenc -pix_fmt yuv420p -preset p7 -tune hq -rc:v vbr -cq:v 10 -b:v 0 -profile:v main -rc-lookahead:v 32 g:\video\test.hevc ffmpeg reports no errors, but simply exits like after 11 frames or so. What am I missing here? __________________ Gorgeous, delicious, deculture!

6th July 2021, 17:10	#2 \| Link
Selur Registered User Join Date: Oct 2001 Location: Germany Posts: 7,277	Have you tried using a higher loglevel to see why ffmpeg exits? __________________ Hybrid here in the forum, homepage

16th July 2021, 11:40	#3 \| Link
frank Banned Join Date: Oct 2001 Location: https://t.me/pump_upp Posts: 811	Code: ffmpeg.exe -c:v h264_cuvid -i test.mp4 -c:v hevc_nvenc ...

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

16th September 2021, 09:57	#5 \| Link
Balling Registered User Join Date: Feb 2020 Posts: 541	No, you can use SW decoder. This looks like another bug. Sigh. As for cuvid part those are really old. Use -hwaccel cuda -hwaccel_format cuda