Changing formats/compressions?
1 - 7 of 7 Posts
Joined
·
5,660 Posts
I believe Irfanview will convert BMP to JPG and vice versa.<br><br><br><br><a href="http://irfanview.tuwien.ac.at/english.htm" target="_blank">http://irfanview.tuwien.ac.at/english.htm</a><br><br><br><br>
It is freeware for home (non-commercial) use.<br><br><br><br>
I don't know what might work with the motion picture formats.
It is freeware for home (non-commercial) use.<br><br><br><br>
I don't know what might work with the motion picture formats.
Joined
·
1,045 Posts
why would you want to go from mpg to avi? mpg is a compressed format and avi is not, all you'll end up doing is getting a bigger file size of the same quality. but anyway, check out vcdhelp.com, it probably tells you.
Joined
·
4,276 Posts
irfanview seems good for image files. Download.com is good place to look for image conversion shareware. The GIMP <a href="http://www.gimp.org/~tml/gimp/win32/downloads.html" target="_blank">http://www.gimp.org/~tml/gimp/win32/downloads.html</a> is a free as in speech as well as in beer solution but this is an area where investing in a commercial program such as Adobe Photoshop Elements or Macromedia Fireworks is a good investment. Just about any computer store will have at least 4-5 titles of image conversion programs.<br><br><br><br>
Motion picture formats are really difficult to convert between reliably. Most motion picture (MOV, MPEG) and audio formats (WMA, MP3, OOG, Real) use lossy compression (they compress the file by cutting out information that the person is unlikely to notice). Because different forms of lossy compression use different methods for cutting out information converting between lossy formats is likely to produce glitches and artefacts. Basically the bottom line is that there really is no good way to convert MPEG to MOV or MP3 to OOG.
Motion picture formats are really difficult to convert between reliably. Most motion picture (MOV, MPEG) and audio formats (WMA, MP3, OOG, Real) use lossy compression (they compress the file by cutting out information that the person is unlikely to notice). Because different forms of lossy compression use different methods for cutting out information converting between lossy formats is likely to produce glitches and artefacts. Basically the bottom line is that there really is no good way to convert MPEG to MOV or MP3 to OOG.
<div class="quote-container"><span>Quote:</span>
<div class="quote-block"><i>Originally posted by stonecrest</i><br><br><b>why would you want to go from mpg to avi? mpg is a compressed format and avi is not, all you'll end up doing is getting a bigger file size of the same quality. but anyway, check out vcdhelp.com, it probably tells you.</b></div>
</div>
<br><br><br>
I don't know a lot about file types and compressions but most avi files I have are smaller than a mpg file. One is only 110MB (avi) compared to 500-600MB (mpg) for the same length and quality. I need something because I have 45 CD's with one file (500-600MB). I thought maybe if I changed the type/compression it would be smaller.
<div class="quote-block"><i>Originally posted by stonecrest</i><br><br><b>why would you want to go from mpg to avi? mpg is a compressed format and avi is not, all you'll end up doing is getting a bigger file size of the same quality. but anyway, check out vcdhelp.com, it probably tells you.</b></div>
</div>
<br><br><br>
I don't know a lot about file types and compressions but most avi files I have are smaller than a mpg file. One is only 110MB (avi) compared to 500-600MB (mpg) for the same length and quality. I need something because I have 45 CD's with one file (500-600MB). I thought maybe if I changed the type/compression it would be smaller.
Joined
·
1,045 Posts
<div class="quote-container"><span>Quote:</span>
<div class="quote-block"><i>Originally posted by Apple</i><br><br><b>I don't know a lot about file types and compressions but most avi files I have are smaller than a mpg file. One is only 110MB (avi) compared to 500-600MB (mpg) for the same length and quality.</b></div>
</div>
<br><br><br>
ah, most likely your avi files are actually divx encodes. divx is a very powerful compression which used to have a different extension but they ended up switching it to just .avi. kind of annoying because you can't sometimes tell if it's an uncompressed video or a divx video. in general though, mpeg is to avi what mp3 is to wav. uncompressed vs. compressed.<br><br><br><br>
the fourth section at <a href="http://vcdhelp.com/convert.htm" target="_blank">http://vcdhelp.com/convert.htm</a> is what you're looking for, there are a ton of programs. but keep in mind that converting to divx means that you're sending the video through another encoding algorithm, which means that the quality of your video will be reduced. hopefully it won't be too noticable, if at all.
<div class="quote-block"><i>Originally posted by Apple</i><br><br><b>I don't know a lot about file types and compressions but most avi files I have are smaller than a mpg file. One is only 110MB (avi) compared to 500-600MB (mpg) for the same length and quality.</b></div>
</div>
<br><br><br>
ah, most likely your avi files are actually divx encodes. divx is a very powerful compression which used to have a different extension but they ended up switching it to just .avi. kind of annoying because you can't sometimes tell if it's an uncompressed video or a divx video. in general though, mpeg is to avi what mp3 is to wav. uncompressed vs. compressed.<br><br><br><br>
the fourth section at <a href="http://vcdhelp.com/convert.htm" target="_blank">http://vcdhelp.com/convert.htm</a> is what you're looking for, there are a ton of programs. but keep in mind that converting to divx means that you're sending the video through another encoding algorithm, which means that the quality of your video will be reduced. hopefully it won't be too noticable, if at all.
1 - 7 of 7 Posts
Join the discussion
Join now to ask and comment!