New answers tagged conversion
0
Most of the conversions can be handled by ffmpeg which comes with a amazing number of codecs.
To convert your file, try the following command:
ffmpeg -i file.rma file.avi
Useful information about a file can be retrieved using the file command. Remember that avi or rma are just containers, so two avi files may not use the same encoding for audio or video. ...
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I think that for png-to-pdf -density parameter should small rather than large. You could try something like convert -quality 100 -density 50
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you can just use the command "file" to get the informations you need:
~# file cha_2.png
cha_2.png: PNG image data, 656 x 464, 8-bit/color RGB, non-interlaced
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found a solution: identify, part of the imagemagick package, does exactly what I need
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Oh, I just found a solution. I used GraphicsMagick to achieve it. So pdfjoin wasn't a good choice.
This is my solution:
gm convert *jpeg output.pdf
Still I ask myself if there is a solution with pdfjoin or similar. Just curious.
2
What you really want to use is:
$ convert a.png b.png -compress jpeg -resize 1240x1753 \
-extent 1240x1753 -gravity center \
-units PixelsPerInch -density 150x150 multipage.pdf
-extentactually extends the image to be 1240x1753, while-resizekeeps the image's ratio, fitting it into either1240x...or...x1753`.
The ...
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Under FreeBSD 8. 2, I tried -codec copy but I got message unknown decoded as well. After trial and error I found the one that working is under FreeBSD:
ffmpeg -i video.mp4 -vcodec copy video.avi
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https://github.com/josch/img2pdf
In all of the proposed solutions involving ImageMagick, the JPEG data gets fully decoded and re-encoded. This results in generation loss, as well as performance "ten to hundred" times worse than img2pdf.
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EXT4 is good in the new versions of different distros.
Don't use ext4 if you are still using older versions. Older version has some issues that have been fixed in new versions. resize unmounted volumes only to be safe.
I used a "live cd" for conversion. went smoothly.
I would recommend backups just to safe but they are just there as a pre-caution.
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Many server admins still are sketchy on ext4, but if you're determined to upgrade I can't think of a way to do it safely without copying everything off of it and reformatting that partition.
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Both ext3 and ext4 are journaling filesystems, in addition this list several differences, the most relevant are:
Maximum individual file size can be from 16 GB to 16 TB
Overall maximum ext4 file system size is 1 EB (exabyte). 1 EB = 1024 PB (petabyte). 1 PB = 1024 TB (terabyte).
Directory can contain a maximum of 64,000 subdirectories (as opposed to 32,000 ...
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