Difference between revisions of "Mencoder"
From Tomelec
(→Scaling and MPEG4 encoding) |
(→MOV from digital camera to MPEG4) |
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Encode a raw DV file from a digital video camera to MPEG4 video with mp3 audio. | Encode a raw DV file from a digital video camera to MPEG4 video with mp3 audio. | ||
<nowiki>mencoder input.dv -vf pp=lb -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=2000 -oac mp3lame -lameopts vbr=3 -o output.avi</nowiki> | <nowiki>mencoder input.dv -vf pp=lb -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=2000 -oac mp3lame -lameopts vbr=3 -o output.avi</nowiki> | ||
| − | Adjust ''vbitrate'' to your needs. ''vbitrate=2000'' produces a quite good quality at a small filesize for videos in TV resolution. | + | Adjust ''vbitrate'' to your needs. ''vbitrate=2000'' produces a quite good quality at a small filesize for videos in TV standard resolution. |
| + | == MOV from digital camera to MPEG4 == | ||
| + | <nowiki>for file in *.MOV; do echo $file; mencoder "$file" -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=1024 -oac mp3lame -lameopts cbr:br=128 -of avi -o `basename $file | cut -d. -f 1`.avi; done</nowiki> | ||
== Scaling and MPEG4 encoding == | == Scaling and MPEG4 encoding == | ||
Scale a high resolution video down to a lower resolution, preserving the aspect ratio. MPEG4 encoding options as usual. | Scale a high resolution video down to a lower resolution, preserving the aspect ratio. MPEG4 encoding options as usual. | ||
| − | This scales any video that ''mencoder'' is able to read to a 480p video (480 pixels high). | + | This scales any video that ''mencoder'' is able to read to a [http://en.wikipedia.org/wiki/480p 480p] video (480 pixels high). |
<nowiki>mencoder input.mov -vf scale=-3:480 -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=3000 -oac mp3lame -lameopts vbr=3 -o output.avi</nowiki> | <nowiki>mencoder input.mov -vf scale=-3:480 -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=3000 -oac mp3lame -lameopts vbr=3 -o output.avi</nowiki> | ||
'''-vf scale=-3:''' calculates the with of the video using the original aspect ratio and the desired height.<br>Other scaling options as noted in ''mplayer´s'' manpage: | '''-vf scale=-3:''' calculates the with of the video using the original aspect ratio and the desired height.<br>Other scaling options as noted in ''mplayer´s'' manpage: | ||
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-3: Calculate w/h using the other dimension and the original aspect ratio. | -3: Calculate w/h using the other dimension and the original aspect ratio. | ||
-(n+8): Like -n above, but rounding the dimension to the closest multiple of 16.</nowiki> | -(n+8): Like -n above, but rounding the dimension to the closest multiple of 16.</nowiki> | ||
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| + | == Windows Media (WMV) encoding == | ||
| + | Encode WMV1 with the given bitrate and no sound. | ||
| + | <nowiki>mencoder video.mp4 -ovc lavc -lavcopts vcodec=wmv1:vbitrate=256 -nosound -o output.avi</nowiki> | ||
Latest revision as of 21:30, 19 February 2013
Hint: all video filters (-vf option) can be previewed using mplayer before starting the actual encoding procedure.
Contents
DV to MPEG4 with deinterlacing
Encode a raw DV file from a digital video camera to MPEG4 video with mp3 audio.
mencoder input.dv -vf pp=lb -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=2000 -oac mp3lame -lameopts vbr=3 -o output.avi
Adjust vbitrate to your needs. vbitrate=2000 produces a quite good quality at a small filesize for videos in TV standard resolution.
MOV from digital camera to MPEG4
for file in *.MOV; do echo $file; mencoder "$file" -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=1024 -oac mp3lame -lameopts cbr:br=128 -of avi -o `basename $file | cut -d. -f 1`.avi; done
Scaling and MPEG4 encoding
Scale a high resolution video down to a lower resolution, preserving the aspect ratio. MPEG4 encoding options as usual. This scales any video that mencoder is able to read to a 480p video (480 pixels high).
mencoder input.mov -vf scale=-3:480 -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=3000 -oac mp3lame -lameopts vbr=3 -o output.avi
-vf scale=-3: calculates the with of the video using the original aspect ratio and the desired height.
Other scaling options as noted in mplayer´s manpage:
0: scaled d_width/d_height -1: original width/height -2: Calculate w/h using the other dimension and the prescaled aspect ratio. -3: Calculate w/h using the other dimension and the original aspect ratio. -(n+8): Like -n above, but rounding the dimension to the closest multiple of 16.
Windows Media (WMV) encoding
Encode WMV1 with the given bitrate and no sound.
mencoder video.mp4 -ovc lavc -lavcopts vcodec=wmv1:vbitrate=256 -nosound -o output.avi
