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--- ffmpeg:encoding:h265:1-pass_target_bitrate [2023/11/01 12:08] – created peter
+++ ffmpeg:encoding:h265:1-pass_target_bitrate [2023/11/01 12:30] (current) – [ffmpeg - Encoding - h265 - 1-pass target bitrate] peter
@@ Line 1: / Line 1: @@
 ====== ffmpeg - Encoding - h265 - 1-pass target bitrate ======
-By setting **-b:v**.
+A simple one-pass encode that tries to reach the specified bitrate at the end.
+  * This will likely lead to the wrong bitrate estimations for the video part.
+  * It is recommended to use a two-pass encoding mode if a certain target bitrate is required.
+By setting **-b:v** and **-b:a**.
+----
+<WRAP important>
+**WARNING:**  Take care of the amounts used for the bitrate!
+  * **-b:v** is bitrate, so 10000 is actually 10 kbps.  The setting should probably be 10000k in this case.
+</WRAP>
 ----
@@ Line 8: / Line 22: @@
 <code bash>
-ffmpeg -i input -c:v libx265 -b:v 8M -preset fast -c:a aac -b:a 128k output.mp4
+ffmpeg -i input.mp4 -c:v libx265 -b:v 8M -b:a 320k output.mkv
-ffmpeg -i input -c:v libx265 -b:v 6000 -preset fast -c:a aac -b:a 128k output.mp4
+ffmpeg -i input.mp4 -c:v libx265 -b:v 8000k -b:a 320k output.mkv
 </code>
+<WRAP info>
+**NOTE:**
+  * **-b:v**:  Target bitrate for Video.
+  * **-b:a**:  Target bitrate for Audio.
+  * Abbreviations can be used, like K for kBit/s and M for MBit/s.
+</WRAP>