4 Mar
2012
4 Mar
'12
8:12 p.m.
On 03/04/2012 07:48 PM, James Stone wrote:
Hi List,
I have a video which needs a bit of eq'ing on the audio side. Can
anyone point me in the direction of how to split the file into audio
and video so I can apply some treatment to the audio, and then combine
them back together again? The video is wmv at the moment, but mplayer
doesn't seem to have any problem with it.
#extract audio
ffmpeg -i orig_video.wmv audio_out.wav
#replace audio
ffmpeg \
-i orig_video.wmv \
-i new_audio.wav \
-vcodec copy \
-map 0.0 -map 1.0 \
new_video.wmv
Details: The "map" may be different depending on the .wmv file.
run `ffprobe` to see which is the video-track in the .wmv file
usually this is "0.0".
Stream #0.0: Video:...
Stream #0.1: Audio: ..
and "1.0" corresponds to the 2nd input file - your new audio.
You may want to add "-acodec wmav2" and "-ar 128k" options for
128kbit/s
Windows Media Audio 2 or whatever audio-codec/quality your want. `ffmpeg
-codecs | grep "EA"` gives you a list of available codecs for Encoding
Audio.
BTW. Ardour3 with videotimeline patch can do all this for you.
import,extract,re-encode using ffmpeg.
robin