Unrecognized option 'cq'

[sugizo]

execute !vid2mp4 --rencode --nvenc --preset 'medium' --crf 23 'ForBiggerBlazes.mp4'

result

Running:
  static_ffmpeg -hide_banner -i "ForBiggerBlazes.mp4"  -vcodec h264_nvenc -preset medium -cq 23 -c:a copy -y "ForBiggerBlazes_converted.mp4"
Unrecognized option 'cq'.
Error splitting the argument list: Option not found
Generated ForBiggerBlazes_converted.mp4

[zackees]

Can you please upload the mp4 and I'll try and fix this today.

[sugizo]

mp4 file wget -c http://commondatastorage.googleapis.com/gtv-videos-bucket/sample/ForBiggerBlazes.mp4

info

• env : google colab
• os : ubuntu x86_64
• python : 3.10.12

[zackees]

notes from chat gpt 4

The error message "Unrecognized option 'cq'" indicates that the option you provided (-cq) is not recognized by ffmpeg. The correct option for setting the quality when using the nvenc codec for NVIDIA hardware encoding is -cq:v for setting the Constant Quality value for the video stream. However, since you're trying to use CRF-like behavior, you actually want to use -rc constqp -qp 23 instead.

Here is how you should modify your command:

static_ffmpeg -hide_banner -i "ForBiggerBlazes.mp4" -vcodec h264_nvenc -preset medium -rc constqp -qp 23 -c:a copy -y "ForBiggerBlazes_converted.mp4"

In this corrected command:

-rc constqp sets the rate control mode to constant quantization parameter. -qp 23 sets the quantization parameter for both I, P, and B frames to 23, which mimics the behavior of CRF in x264/265 but in a manner suitable for NVENC.