[FFmpeg-devel] [PATCH] avcodec/nvenc: multiple reference frames support

[Roman Arzumanyan]

Hello,

This patch adds multiple reference frames support (part of Video Codec SDK 9.1).
It adds "nb_ref_frames" CLI option to set number of reference frames. Possible values:

  *   auto - let encoder decide (default value).
  *   [0;7] - set value by hand. 0 is equal to auto.

Usage example:
ffmpeg -i big_buck_bunny_1080p_h264.mov -c:v hevc_nvenc -frames:v 128 -nb_ref_frames auto -bf 2 -y big_buck_bunny_1080p_nb_auto.h265
ffmpeg -i big_buck_bunny_1080p_h264.mov -c:v h264_nvenc -frames:v 128 -nb_ref_frames 1          -y big_buck_bunny_1080p_nb_1.h264

Actual number of reference frames will be determined by encoder, but it will not exceed value of "nb_ref_frames" option.

--
BR, Roman Arzumanyan


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