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--- ffmpeg:conversions:convert_h264_to_av1:libaom:average_bitrate_abr [2023/06/15 11:46] – peter
+++ ffmpeg:conversions:convert_h264_to_av1:libaom:average_bitrate_abr [2023/06/15 13:34] (current) – peter
@@ Line 1: / Line 1: @@
 ====== ffmpeg - Conversions - Convert H264 to AV1 - libaom - Average Bitrate (ABR) ======
-**libaom-av1** allows a minimum and maximum bitrate can be specified, instead of a quality target.
+**libaom-av1** offers a simple "Average Bitrate" or "Target Bitrate" mode.
-  * This method is useful for bulk encoding videos in a generally consistent fashion.
+  * In this mode, it will simply try to reach the specified bit rate on average, such as 2 MBit/s.
 <WRAP info>
-**NOTE:**  When muxing into MP4, you may want to add **-movflags +faststart** to the output parameters if the intended use for the resulting file is streaming.
+**NOTE:**  Use this option only if file size and encoding time are more important factors than quality alone.
+  * Otherwise, use one of the other rate control methods.
 </WRAP>
@@ Line 12: / Line 15: @@
 <code bash>
-time ffmpeg -i a.mp4 -c:v libaom-av1 -minrate 500k -b:v 2000k -maxrate 2500k -f mp4 out.mp4
+time ffmpeg -i a.mp4 -c:v libaom-av1 -b:v 2M -f mp4 out.mp4
 </code>
@@ Line 19: / Line 22: @@
 <code bash>
 ...
-real	107m58.989s
+real	106m2.063s
-user	618m30.322s
+user	601m51.372s
-sys	0m32.327s
+sys	0m34.574s
 </code>