====== Preset - 1080pH264 -> 1080p/H265 & 720p/H265 ======
===== Avant propos =====
C'est test sont indicatif, ils ont été fait avec des paramètres limiter, il ont valeur d'indication.

===== Protocole de test =====
  * ffmpeg pour l'encodage
  * La libraire libx265 pour la compression
  * La mesure du bitrate est fait avec ffmpeg
  * Mesure du temps en Ms avec la commande //date//
  * Le CRF 24 est utilisé pour l’encodage en 1080p
  * Le CRF 20 est utilisé pour l’encodage en 720p
  * Le fichier source est en 1080p/H264 avec un bitrate de 10Mb/s, extrait du site http://jell.yfish.us/

===== Logiciels utilisés =====
==== Commandes ====
  * ffmpeg - encodage <code>-vcodec libx265 -preset X -profile:v main -x265-params level=4.1:high-tier=1 -pix_fmt yuv420p -crf X</code>

  * ffmpeg - encodage 720p <code>-vf scale=1280:-1 -vcodec libx265 -preset faster -profile:v main -x265-params level=4.1:high-tier=1 -pix_fmt yuv420p -crf</code>

  * ffmpeg - bitrate <code>grep "bitrate" | awk '{$6=$6/1024; print $6;}')</code>

  * ffprobe - frame size <code>-select_streams V -show_entries frame=pict_type,pkt_size,pkt_pts_time -of csv</code>

==== Versions =====
  * ffmpeg version 4.2.2
  * ffprobe version 4.2.2
  * x265 [info]: HEVC encoder version 3.3+1-f94b0d32737d

===== Résultats des tests 1080p =====
==== presets ====
{{ :gnu-linux:benchmark:libx265:1080p_Preset_H264-1080p_jellyfish-10-mbps-hd-h264-preset-gnu-plot-bitrate.png?800 |}}
{{ :gnu-linux:benchmark:libx265:1080p_Preset_H264-1080p_jellyfish-10-mbps-hd-h264-preset-gnu-plot-time.png?800 |}}
{{ :gnu-linux:benchmark:libx265:1080p_Preset_H264-1080p_jellyfish-10-mbps-hd-h264-preset-gnu-plot-size.png?800 |}}
==== frame size/preset ====
{{ :gnu-linux:benchmark:libx265:1080p_Preset_H264-1080p_jellyfish-10-mbps-hd-h264-preset-gnu-plot-frame-size.png |}}
{{ :gnu-linux:benchmark:libx265:1080p_Preset_H264-1080p_jellyfish-10-mbps-hd-h264-veryfast-preset-gnu-plot-frame-size.png |}}
{{ :gnu-linux:benchmark:libx265:1080p_Preset_H264-1080p_jellyfish-10-mbps-hd-h264-faster-preset-gnu-plot-frame-size.png |}}
{{ :gnu-linux:benchmark:libx265:1080p_Preset_H264-1080p_jellyfish-10-mbps-hd-h264-fast-preset-gnu-plot-frame-size.png |}}
{{ :gnu-linux:benchmark:libx265:1080p_Preset_H264-1080p_jellyfish-10-mbps-hd-h264-medium-preset-gnu-plot-frame-size.png |}}
{{ :gnu-linux:benchmark:libx265:1080p_Preset_H264-1080p_jellyfish-10-mbps-hd-h264-slow-preset-gnu-plot-frame-size.png |}}
{{ :gnu-linux:benchmark:libx265:1080p_Preset_H264-1080p_jellyfish-10-mbps-hd-h264-slower-preset-gnu-plot-frame-size.png |}}
{{ :gnu-linux:benchmark:libx265:1080p_Preset_H264-1080p_jellyfish-10-mbps-hd-h264-veryslow-preset-gnu-plot-frame-size.png |}}

===== Résultats des tests 720p =====
==== presets ====
{{ :gnu-linux:benchmark:libx265:720p_Preset_H265-1080p_jellyfish-10-mbps-hd-h264-preset-gnu-plot-bitrate.png?800 |}}
{{ :gnu-linux:benchmark:libx265:720p_Preset_H265-1080p_jellyfish-10-mbps-hd-h264-preset-gnu-plot-time.png?800 |}}
{{ :gnu-linux:benchmark:libx265:720p_Preset_H265-1080p_jellyfish-10-mbps-hd-h264-preset-gnu-plot-size.png?800 |}}
==== frame size/preset ====
{{ :gnu-linux:benchmark:libx265:720p_preset_h265-1080p_jellyfish-10-mbps-hd-h264-preset-gnu-plot-frame-size.png |}}
{{ :gnu-linux:benchmark:libx265:720p_preset_h265-1080p_jellyfish-10-mbps-hd-h264-veryfast-preset-gnu-plot-frame-size.png |}}
{{ :gnu-linux:benchmark:libx265:720p_preset_h265-1080p_jellyfish-10-mbps-hd-h264-faster-preset-gnu-plot-frame-size.png |}}
{{ :gnu-linux:benchmark:libx265:720p_preset_h265-1080p_jellyfish-10-mbps-hd-h264-fast-preset-gnu-plot-frame-size.png |}}
{{ :gnu-linux:benchmark:libx265:720p_preset_h265-1080p_jellyfish-10-mbps-hd-h264-medium-preset-gnu-plot-frame-size.png |}}
{{ :gnu-linux:benchmark:libx265:720p_preset_h265-1080p_jellyfish-10-mbps-hd-h264-slow-preset-gnu-plot-frame-size.png |}}
{{ :gnu-linux:benchmark:libx265:720p_preset_h265-1080p_jellyfish-10-mbps-hd-h264-slower-preset-gnu-plot-frame-size.png |}}
{{ :gnu-linux:benchmark:libx265:720p_preset_h265-1080p_jellyfish-10-mbps-hd-h264-veryslow-preset-gnu-plot-frame-size.png |}}