Differences

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--- regie:regie_video [2021/09/18 18:47] – [Transcodage Vidéo] mh
+++ regie:regie_video [2022/02/09 10:48] – [Ressources] mh
@@ Line 44: / Line 44: @@
 ----
-===== Transcodage Vidéo =====
+===== FFMPEG =====
-De manière générale ''ffmpeg'' permet de faire directement en ligne de commandes des ré-encodages
+=== Re-encode into Apple Pro Res ===
-=== Ré-Encoder un fichier en Apple Pro Res ===
 <code bash>
@@ Line 65: / Line 63: @@
   *3 – means rotate by 90 degrees clockwise and flip
+=== Control Quality ===
+The CRF option sets the encode quality. The bit-rate will vary as necessary to provide a consistent quality throughout the video. 51 being the worst to 0 being the best (lossless). Usually around 15-20 is a good ratio quality vs filesize.
+You can use the ''-ss'' (start timecode in seconds) and ''-t'' (duration in seconds) options to create short test encodes.
+To create a 1min clip starting 1min into the video:
+<code bash>
+$ffmpeg -i input-video.mp4 -c:v libx264 -c:a -crf 15 aac -ss=60 -t=60 output-video.mp4
+</code>
@@ Line 95: / Line 104: @@
 $ffmpeg -h encoder=libx264 //list all options on encoder
 </code>
+===== SDI & bitrates =====
+{{regie:video_formats_bitrates.png?500}}
 ===== Ressources =====