Différences

Ci-dessous, les différences entre deux révisions de la page.

--- documentation:informatique:linux:ffmpeg:index [2021/02/28 16:30] – f1sls
+++ documentation:informatique:linux:ffmpeg:index [2021/02/28 17:09] (Version actuelle) – [UHD (4k / 3840×2160) ➜ HD (1920×1080)] f1sls
@@ Ligne 4: / Ligne 4: @@
 ===== QUALITY FACTOR ======
+===== FASTSTART FOR WEB VIDEOS =====
+You can add ''-movflags +faststart'' as an output option if your videos are going to be viewed in a browser. This will move some information to the beginning of your file and allow the video to begin playing before it is completely downloaded by the viewer. It is not required if you are going to use a video service such as YouTube. YouTube recommends using faststart, so they can begin re-encoding before uploads complete.
 ===== UHD (4k / 3840×2160) ➜ HD (1920×1080) =====
@@ Ligne 12: / Ligne 14: @@
 <code bash>
-$ ffmpeg -i input.mp4 -vf scale=1920x1080 -sws_flags bicublin -tune film output.mp4
+#
+$ ffmpeg -i input.mp4 -vf scale=1920x1080 -sws_flags bicublin+full_chroma_int -preset veryslow -tune film output.mp4
+#
+$ ffmpeg -i input.mp4 -vf scale=1920x1080 -sws_flags area+full_chroma_int -preset veryslow -tune film output.mp4
 </code>