Changes between Version 5 and Version 6 of Encode/VP8

Timestamp:

Feb 9, 2016, 11:01:40 PM (10 years ago)

Author:

relaxed

Comment:

Helped someone in #ffmpeg figure this out. Thought it might helpful to others.

Encode/VP8

@@ -50 +50 @@
 Here, you can choose different values for the bitrate other than `1M`, e.g. `500K`, but you must set all options (i.e., `minrate`, `maxrate` and `b:v`) to the same value.
 
+== Alpha Channel ==
+
+VP8 includes alpha channel support that can be seen at [http://simpl.info/videoalpha/] using Google Chrome. To create a similar video with ffmpeg from a series of png images:
+
+{{{
+ffmpeg -i %04d.png -c:v libvpx -pix_fmt yuva420p -metadata:s:v:0 alpha_mode="1" output.webm
+}}}
+
+This is just the basic command needed for it to work. Add your variable or constant bitrate encoding options to control quality.
+ 
 == Also see ==