Difference between revisions of "Mplayer"
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lame sound.wav sound.mp3</nowiki> | lame sound.wav sound.mp3</nowiki> | ||
This can be used to get playable mp3 files from downloaded Youtube videos. Possibly there is a better way with mencoder? | This can be used to get playable mp3 files from downloaded Youtube videos. Possibly there is a better way with mencoder? | ||
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== Video to PNG files == | == Video to PNG files == | ||
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It might be useful to crop and/or scale the video before writing PNGs: | It might be useful to crop and/or scale the video before writing PNGs: | ||
<nowiki>mplayer -nosound -benchmark /path/to/video.avi -vf crop=100:10:80:80,scale=50:50 -vo png:z=0</nowiki> | <nowiki>mplayer -nosound -benchmark /path/to/video.avi -vf crop=100:10:80:80,scale=50:50 -vo png:z=0</nowiki> | ||
| − | This takes a 80x80px area, starting from (x,y)=(100,10), scales it to 50x50px and writes a PNG file for each frame. | + | This takes a 80x80px area, starting from (x,y)=(100,10), scales it to 50x50px and writes a PNG file for each frame. The result is a directory full of PNGs - a PNG sequence. |
| + | |||
| + | |||
| + | == Play PNG sequence == | ||
| + | Mplayer is able to play PNG sequences. All PNGs must have the same geometry. The framerate ist defined by the ''-fps'' option. The command must be executed in the directory of the PNG files. | ||
| + | <nowiki>mplayer mf:// type=png -fps 25</nowiki> | ||
| + | Add a scaling video filter for very small images. ''Software scaler 4'' is useful to observe each pixel without blurring. | ||
| + | <nowiki>mplayer mf:// -mf type=png -vf scale=320:240 -fps 25 | ||
| + | mplayer mf:// -mf type=png -vf scale=320:240 -sws 4 -fps 25 | ||
Revision as of 15:00, 17 September 2011
Flash Video (FLV) to wav or mp3
It´s can be in two easy steps. First extract the audio track using mplayer, then encode the wav-file to an mp3 using lame. The -novideo option makes this operation faster.
mplayer -ao pcm:file=sound.wav -novideo flashvideo.flv lame sound.wav sound.mp3
This can be used to get playable mp3 files from downloaded Youtube videos. Possibly there is a better way with mencoder?
Video to PNG files
Writing a PNG file for each frame in the Video file. PNG files will be written to the current directory.
mplayer -nosound -benchmark -vo png:z=0 /path/to/video.avi
Output files are named 00000001.png, 00000002.png, 00000003.png, ...
It might be useful to crop and/or scale the video before writing PNGs:
mplayer -nosound -benchmark /path/to/video.avi -vf crop=100:10:80:80,scale=50:50 -vo png:z=0
This takes a 80x80px area, starting from (x,y)=(100,10), scales it to 50x50px and writes a PNG file for each frame. The result is a directory full of PNGs - a PNG sequence.
Play PNG sequence
Mplayer is able to play PNG sequences. All PNGs must have the same geometry. The framerate ist defined by the -fps option. The command must be executed in the directory of the PNG files.
mplayer mf:// type=png -fps 25
Add a scaling video filter for very small images. Software scaler 4 is useful to observe each pixel without blurring.
<nowiki>mplayer mf:// -mf type=png -vf scale=320:240 -fps 25
mplayer mf:// -mf type=png -vf scale=320:240 -sws 4 -fps 25
