Differences

This shows you the differences between two versions of the page.

--- ffmpeg:conversions:convert_h264_to_av1 [2023/06/13 12:03] – peter
+++ ffmpeg:conversions:convert_h264_to_av1 [2023/06/13 21:50] (current) – peter
@@ Line 1: / Line 1: @@
 ====== ffmpeg - Conversions - Convert H264 to AV1 ======
+While AV1 is used to create video files, it is not a file format.
+  * Rather, it is a compression format that any program that saves video files can use to compress videos.
+  * AV1 videos are most commonly saved using one of several more common video container formats, such as MP4, MKV, and WEBM.
+    * However, in rare circumstances, you may encounter an AV1 video saved with the **.av1** extension.
+There are various methods to convert to AV1.
+AV1 is implemented in **libaom** and **svt-av1**.
+  * [[ffmpeg:Conversions:Convert H264 to AV1:libaom|libaom]]
+  * [[ffmpeg:Conversions:Convert H264 to AV1:svt-av1|svt-av1]]
+----
 <code bash>
-ffmpeg -i input.mp4 -c:v av1 output.avi
+ffmpeg -y -i a.mp4 -c:v libaom-av1 -strict -2 -b:v 3000K -maxrate 6000K -cpu-used 8 -pass 2 out.mp4
+ffmpeg -i input.mp4 -c:v av1 output.av1
+</code>
+<code bash>
+ffmpeg -y -i input.mp4 -c:v libaom-av1 -strict -2 -b:v 3000K -maxrate 6000K -cpu-used 8 -pass 1 -f matroska NUL & \
+ffmpeg -i input.mp4 -c:v libaom-av1 -strict -2 -b:v 3000K -maxrate 6000K -cpu-used 0 -pass 2 output_AV1.mkv
 </code>
@@ Line 20: / Line 47: @@
 </WRAP>
+----
+===== Simple method, with Quality/Speed ratio modifier =====
+<code bash>
+ffmpeg -y -i a.mp4 -c:v libaom-av1 -cpu-used 8 -f mp4 out.mp4
+</code>
+<WRAP info>
+**NOTE:**  The **-cpu-used 8** option sets the quality to the higher.
+</WRAP>
+----
+===== Simple usage =====
+<code bash>
+ffmpeg -y -i a.mp4 -c:v libaom-av1 -f mp4 out.mp4
+</code>
+<WRAP info>
+**NOTE:**  It is extremely slow.
+</WRAP>
+----
+===== References =====
+https://trac.ffmpeg.org/wiki/Encode/AV1