Can't record gameplay with N64

[saccublenda]

Hello, following the instructions given here I am able to record gameplay for any lr emulator, except for N64. I've tried lr-mupen64plus-next, lr-mupen64plus and lr-parallel-n64, in all cases the game starts ok but no recording is produced. Is by chance video recording disabled for these emulators?

Pi Model or other hardware: pi4 4gb
Power Supply used: USB3.0
RetroPie Version Used: 4.7.1
Built From: https://github.com/RetroPie/RetroPie-Setup/releases/download/4.7.1/retropie-buster-4.7.1-rpi4_400.img.gz
USB Devices connected: 1x Keyboard / 1x Controller
Controller used: 8bitdo sfc30 (bluetooth)

[mitu]

The log file shows

[WARN] [recording] Libretro core is hardware rendered. Must use post-shaded recording as well..

so I guess it's a RetroArch limitation. The same thing happens for Dreamcast (with lr-flycast).

[saccublenda]

@mitu Thanks. I found out that I can record N64 using the retroarch menu and setting Use GPU Recording to on (although it is extremely choppy and unplayable). Does someone know what is the ffmpeg option equivalent to the retroarch Use GPU Recording to put in the custom recordconfig file? I tried hwaccel = auto but it does not seem to work.