====== CRF - 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//
  * Les fichiers source sont tous en HEVC 1080p et sont extrait du site http://jell.yfish.us/
  * Les CRF de 0 à 9 et au delà de 30 ne sont pas traiter ici

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

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

===== Resultats des tests 1080p =====
==== Source H264 3Mb/s ====
{{ :gnu-linux:benchmark:1080p_CRF_H264-1080p_jellyfish-03-mbps-hd-h264-gnu-plot-bitrate.png?800 |}}
{{ :gnu-linux:benchmark:1080p_CRF_H264-1080p_jellyfish-03-mbps-hd-h264-gnu-plot-time.png?800 |}}
==== Source H264 5Mb/s ====
{{ :gnu-linux:benchmark:1080p_CRF_H264-1080p_jellyfish-05-mbps-hd-h264-gnu-plot-bitrate.png?800 |}}
{{ :gnu-linux:benchmark:1080p_CRF_H264-1080p_jellyfish-05-mbps-hd-h264-gnu-plot-time.png?800 |}}
==== Source H264 10Mb/s ====
{{ :gnu-linux:benchmark:1080p_CRF_H264-1080p_jellyfish-10-mbps-hd-h264-gnu-plot-bitrate.png?800 |}}
{{ :gnu-linux:benchmark:1080p_CRF_H264-1080p_jellyfish-10-mbps-hd-h264-gnu-plot-time.png?800 |}}
==== Source H264 25Mb/s ====
{{ :gnu-linux:benchmark:1080p_CRF_H264-1080p_jellyfish-25-mbps-hd-h264-gnu-plot-bitrate.png?800 |}}
{{ :gnu-linux:benchmark:1080p_CRF_H264-1080p_jellyfish-25-mbps-hd-h264-gnu-plot-time.png?800 |}}
==== Source H264 50Mb/s ====
{{ :gnu-linux:benchmark:1080p_CRF_H264-1080p_jellyfish-50-mbps-hd-h264-gnu-plot-bitrate.png?800 |}}
{{ :gnu-linux:benchmark:1080p_CRF_H264-1080p_jellyfish-50-mbps-hd-h264-gnu-plot-time.png?800 |}}
==== Comparaison du CRF 10 ====
{{ :gnu-linux:benchmark:1080p_CRF_H264-1080p_CRF10-gnu-plot-bitrate.png?800 |}}
==== Comparaison du CRF 14 ====
{{ :gnu-linux:benchmark:1080p_CRF_H264-1080p_CRF14-gnu-plot-bitrate.png?800 |}}
==== Comparaison du CRF 16 ====
{{ :gnu-linux:benchmark:1080p_CRF_H264-1080p_CRF16-gnu-plot-bitrate.png?800 |}}
==== Comparaison du CRF 20 ====
{{ :gnu-linux:benchmark:1080p_CRF_H264-1080p_CRF20-gnu-plot-bitrate.png?800 |}}
==== Comparaison du CRF 24 ====
{{ :gnu-linux:benchmark:1080p_CRF_H264-1080p_CRF24-gnu-plot-bitrate.png?800 |}}
==== Comparaison du CRF 26 ====
{{ :gnu-linux:benchmark:1080p_CRF_H264-1080p_CRF26-gnu-plot-bitrate.png?800 |}}
==== Comparaison du CRF 30 ====
{{ :gnu-linux:benchmark:1080p_CRF_H264-1080p_CRF30-gnu-plot-bitrate.png?800 |}}

===== Resultats des tests 720p =====
==== Source H264 3Mb/s ====
{{ :gnu-linux:benchmark:720p_H264-1080p_jellyfish-03-mbps-hd-h264-gnu-plot-bitrate.png?800 |}}
{{ :gnu-linux:benchmark:720p_H264-1080p_jellyfish-03-mbps-hd-h264-gnu-plot-time.png?800 |}}
==== Source H264 5Mb/s ====
{{ :gnu-linux:benchmark:720p_H264-1080p_jellyfish-05-mbps-hd-h264-gnu-plot-bitrate.png?800 |}}
{{ :gnu-linux:benchmark:720p_H264-1080p_jellyfish-05-mbps-hd-h264-gnu-plot-time.png?800 |}}
==== Source H264 10Mb/s ====
{{ :gnu-linux:benchmark:720p_H264-1080p_jellyfish-10-mbps-hd-h264-gnu-plot-bitrate.png?800 |}}
{{ :gnu-linux:benchmark:720p_H264-1080p_jellyfish-03-mbps-hd-h264-gnu-plot-time.png?800 |}}
==== Source H264 25Mb/s ====
{{ :gnu-linux:benchmark:720p_H264-1080p_jellyfish-25-mbps-hd-h264-gnu-plot-bitrate.png?800 |}}
{{ :gnu-linux:benchmark:720p_H264-1080p_jellyfish-25-mbps-hd-h264-gnu-plot-time.png?800 |}}
==== Source H264 50Mb/s ====
{{ :gnu-linux:benchmark:720p_H264-1080p_jellyfish-50-mbps-hd-h264-gnu-plot-bitrate.png?800 |}}
{{ :gnu-linux:benchmark:720p_H264-1080p_jellyfish-50-mbps-hd-h264-gnu-plot-time.png?800 |}}
==== Comparaison du CRF 10 ====
{{ :gnu-linux:benchmark:720p_H264-1080p_CRF10-gnu-plot-bitrate.png?800 |}}
==== Comparaison du CRF 14 ====
{{ :gnu-linux:benchmark:720p_H264-1080p_CRF14-gnu-plot-bitrate.png?800 |}}
==== Comparaison du CRF 16 ====
{{ :gnu-linux:benchmark:720p_H264-1080p_CRF16-gnu-plot-bitrate.png?800 |}}
==== Comparaison du CRF 20 ====
{{ :gnu-linux:benchmark:720p_H264-1080p_CRF20-gnu-plot-bitrate.png?800 |}}
==== Comparaison du CRF 24 ====
{{ :gnu-linux:benchmark:720p_H264-1080p_CRF24-gnu-plot-bitrate.png?800 |}}
==== Comparaison du CRF 26 ====
{{ :gnu-linux:benchmark:720p_H264-1080p_CRF26-gnu-plot-bitrate.png?800 |}}
==== Comparaison du CRF 30 ====
{{ :gnu-linux:benchmark:720p_H264-1080p_CRF30-gnu-plot-bitrate.png?800 |}}