Changes between Version 67 and Version 68 of Encode/H.264

Timestamp:

Jul 30, 2018, 7:36:42 PM (8 years ago)

Author:

slhck

Comment:

note that -an can be used in first pass

Encode/H.264

@@ -120 +120 @@
 * In pass 1, output to a null file descriptor, not an actual file. (This will generate a logfile that ffmpeg needs for the second pass.)
 * In pass 1, you need to specify an output format (with `-f`) that matches the output format you will use in pass 2.
-* In pass 1, specify the audio codec used in pass 2; in many cases, `-an` in pass 1 will not work.
+* In pass 1, you can leave audio out by specifying `-an`.
 
 For example:
 
 {{{
-ffmpeg -y -i input -c:v libx264 -b:v 2600k -pass 1 -c:a aac -b:a 128k -f mp4 /dev/null && \
+ffmpeg -y -i input -c:v libx264 -b:v 2600k -pass 1 -an -f mp4 /dev/null && \
 ffmpeg -i input -c:v libx264 -b:v 2600k -pass 2 -c:a aac -b:a 128k output.mp4
 }}}