====== ffmpeg - Hardware transcoding using GPUs - Nvidia GPU ======

===== Nvidia GPUs =====

<code>
nvenc_h264
nvenc_h265
</code>

----

===== Decoding =====

<code bash>
-hwaccel cuda
</code>

----

===== Encoding =====

==== For video resolution <= 4K ====

<code bash>
-c:v h264_nvenc
</code>

==== For video resolution > 4K ====

<code bash>
-c:v hevc_nvenc
</code>

----

===== Examples =====

#1 - A corrupt 1920x1080 video:

<code bash>
ffmpeg -y -vsync 0 -hwaccel cuda -i "input.mp4" -c:a copy -c:v h264_nvenc -b:v 2M -pix_fmt yuv420p "output.mp4"
</code>

----

#2 
- a 7680x3840 H.265 video with incompatible profile for VHT
- a stutter playback 7260x3630 60fps 10bit video

<code bash>
ffmpeg -y -vsync 0 -hwaccel cuda -i "input.mp4" -c:a copy -c:v hevc_nvenc -b:v 80M -pix_fmt yuv420p "output.mp4"
</code>

----

#3
- a 7680x7680 video not hardware decoded because is H.264 encoded

<code bash>
ffmpeg -y -vsync 0 -i "input.mp4" -c:a copy -c:v hevc_nvenc -b:v 62M -pix_fmt yuv420p "output.mp4"
</code>