[FFmpeg-user] NV12 devices/players compatibility

[Carl Eugen Hoyos]

> Am 02.02.2021 um 16:16 schrieb Alessandro Molon <alex.molon at vision247.com>:
> 
> I normally transcode using ffmpeg with h264_nvenc, that produces a NV12 output

This does not sound correct:
The h264_nvenc encoder (always) produces h264 output, it cannot output anything else.
The h264_nvenc encoder only accepts nv12 input while most other encoders accept yuv420p. Semantically, yuv420p and nv12 are identical, an encoder that accepts both (and that runs single-threaded and produces deterministic output) would produce identical output if the „same“ nv12/yuv420p data is provided as input.

Carl Eugen