FFMPEG using GPU?

[ujang]

hi, sorry for my bad english,
i read in internet, you can use GPU to help FFMPEG to run faster,
i have this intel HD graphic 4600, and nvidia geforce gtx 750 ti,
can i use it for FFMPEG?

if it can, can it set priority(like priority in task manager) to low or background?,
(i dont want my display lag when browsing)

thanks for reading

[jagabo]

Specify h264_nvenc, hevc_nvenc, h264_qsv, or hevc_qsv as the encoder.

You can always use Windows' Start command to start programs at low priority.

Start /b /low "Window Name" ffmpeg.exe...

[ujang]

Specify h264_nvenc, hevc_nvenc, h264_qsv, or hevc_qsv as the encoder.

You can always use Windows' Start command to start programs at low priority.

Start /b /low "Window Name" ffmpeg.exe...

you help me again, thanks, ok then

"c:\ffmpeg.exe" -i "%~1" -f segment "%~dp1output\%~n1.%%03d.mp4"

please, tell me how to put the "h264_nvenc, hevc_nvenc, h264_qsv, or hevc_qsv" in that line

[jagabo]

Add to the command line after the source input:

-c:v h264_nvenc

Do a web search for command line parameters.

[ujang]

Add to the command line after the source input:

-c:v h264_nvenc

Do a web search for command line parameters.

something like this

"c:\ffmpeg.exe" -i "%~1" -c:v h264_nvenc -f segment "%~dp1output\%~n1.%%03d.mp4"

and the result is

[h264_nvenc @ 000002935ebf6480] Driver does not support the required nvenc API version. Required: 9.0 Found: 8.1
[h264_nvenc @ 000002935ebf6480] The minimum required Nvidia driver for nvenc is 418.81 or newer
Error initializing output stream 0:0 -- Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height

i will try other option then,
thanks for the reply

[jagabo]

It says you need a more up to date nvenc driver (from nvidia).

[ujang]

It says you need a more up to date nvenc driver (from nvidia).

i have updated the driver and use h264_nvenc, i works, thank a lot to you, hi hi hi

(edit),
it super fast, usually the "opening for writing" about 4 to 8 seconds, but after using h264_nvenc, it decreases to 1 or 2 seconds

[ujang]

It says you need a more up to date nvenc driver (from nvidia).

something wrong , it indeed fast but the segment cut is not precise, i will back to non "-c:v h264_nvenc" then

[jagabo]

It says you need a more up to date nvenc driver (from nvidia).

something wrong , it indeed fast but the segment cut is not precise

You might have to force the GOP size to match the desired segment time. For example, with a 25 fps video set the GOP size to 50 to match the 2 second segment size:

-g 50

If you get it working, please post the full command line here. It may be useful to others in the future.

[ujang]

It says you need a more up to date nvenc driver (from nvidia).

something wrong , it indeed fast but the segment cut is not precise

You might have to force the GOP size to match the desired segment time. For example, with a 25 fps video set the GOP size to 50 to match the 2 second segment size:

-g 50

If you get it working, please post the full command line here. It may be useful to others in the future.

i will try it later. currently, the batch is processing 500mb of a video file, i don't know when it done,
meanwhile i looking for alternative way, making a list without -c:v h264_nvenc(or hevc_nvenc, h264_qsv, hevc_qsv),
and split the result using -c:v h264_nvenc, and i did not make any progress

[ujang]

It says you need a more up to date nvenc driver (from nvidia).

something wrong , it indeed fast but the segment cut is not precise

You might have to force the GOP size to match the desired segment time. For example, with a 25 fps video set the GOP size to 50 to match the 2 second segment size:

-g 50

If you get it working, please post the full command line here. It may be useful to others in the future.

i have test it, with "-c:v h264_nvenc -g 50" faster but still not accurate,
i still prefer using it without "-c:v h264_nvenc -g 50"

[Selur]

adding '-strict_gop 1' might help

[ujang]

adding '-strict_gop 1' might help

thanks for the reply, i added the '-strict_gop 1', the result is like this

"c:\ffmpeg.exe" -i "%~1" -c:v h264_nvenc -g 50 -strict_gop 1 -f segment "%~dp1output\%~n1.%%03d.mp4"

but the result is not precise,
i still prefer using " -c:v h264_nvenc",
i know it very slow (almost 5x slower), but it precise,
thanks for your concern