各种文件转换命令
Category: /knowledge /linuxTags: linux
Audio/Video
copy with dvdbackup ——————————— A single title
dvdbackup -i /dev/dvd -o ~ -t 1
The main feature
dvdbackup -i /dev/dvd -o ~ -F
The whole DVD
dvdbackup -i /dev/dvd -o ~ -M
Creating an ISO
mkisofs -dvd-video -udf -o ~/dvd.iso ~/MOVIE_NAME
Test playing with mplayer
mplayer dvd:// -dvd-device ~/dvd.iso
burn the image
growisofs -Z /dev/dvd=~/dvd.iso
copy DVD images
sudo apt-get install libdvdread4
sudo /usr/share/doc/libdvdread4/install-css.sh
then try k9copy
convert from VOB to AVI
ffmpeg -b 1600k -vcodec [libxvid|mpeg4|copy] -i VTS_01_1.VOB ~/download/output.avi
这里的1600k是bits/second, 不是kbytes/sec, 所以不能设太低. 我一般取原文件的1/4.
split/extract videos
如果我想截取一个视频文件中的一小部分, 如果从第4分33秒处开始, 截取15分钟长的视频. 在编辑视频时很有用.
ffmpeg -vcodec copy -ss 00:04:33 -t 00:15:00 -i infile.avi outfile.avi
如果想截图的话用
每一秒截一张, size: WxH
ffmpeg -i foo.avi -r 1 -s WxH -f image2 foo-%03d.jpeg
-vframes -t -ss 结合起来可指定时间/长度/张数
convert from APE to WAV
ffmpeg -i input.ape ~/download/output.wav
convert from WAV to MP3
ffmpeg -i input.wav -vn -ar 44100 -ac 2 -ab 192k -f mp3 output.mp3
Extracting sound from a video, and save it as Mp3
ffmpeg -i source_video.avi -vn -ar 44100 -ac 2 -ab 192k -f mp3 sound.mp3
adjust MP3 bitrate
Suppose I need to convert current mp3 audio books to a lower bitrate at 112K to a folder called “new_dir”, run
for fn in `ls *.mp3`; do ffmpeg -i $fn -ab 112k new_dir/$fn; done
PDF and other doc types
trim/crop edges of PDF files
sudo aptitude install pdfjam
pdfnup --nup 1x1 --trim "1cm 3cm 1cm 1cm" --outfile test.pdf your_source.pdf
# note: the order of trim parameters are "left bottom right top"
split/merge PDF files
sudo aptitude install pdftk
merge files into one PDF:
pdftk 001.pdf 002.pdf cat output one-large-single-file.pdf
split a large PDF to many single-page files: 这个可以用在把批处理扫描的文件打散分别处理.
pdftk large-file.pdf burst
