VirtualDub, Help

McDoogle-san · Post by **McDoogle-san** » Thu Feb 22, 2007 8:44 am

I just got some time to try and re-encode my episodes of bleach using virtualdub, and i keep getting an error when i try to open a file.

Code: Select all

Couldn't locate decompresser for format 'DX50' (unknown)

Virtualdub requires a video for windows (VFW) compatible codec to decompress video. DirectShow codecs, such as those used by windows media player, are not suitable

am i not using the program right? because DivX isn't exactly a windows codec that im using?

any ideas?

BasharOfTheAges · Post by **BasharOfTheAges** » Thu Feb 22, 2007 9:04 am

It is, however, the codec the video is encoded with. You need it to be able to decode the video so you can put it into another format.

McDoogle-san · Post by **McDoogle-san** » Thu Feb 22, 2007 6:31 pm

but i can decode the video, its fine, im using the DivX codec for it.

Scintilla · Post by **Scintilla** » Thu Feb 22, 2007 6:41 pm

Apparently you're not using a version that has VfW support, then.

<a href="http://www.koepi.org/xvid.shtml">XviD</a> should decode DX50 just fine, if you set it to in the codec options.

McDoogle-san · Post by **McDoogle-san** » Fri Feb 23, 2007 9:19 am

ive just installed it now and uninstalled my DivX and AVi package, ill have to restart to see if it worked or not.

McDoogle-san · Post by **McDoogle-san** » Fri Feb 23, 2007 1:00 pm

ok, everything now is fine, i can import it perfectly fine and change everything fine, but i do have a small problem again.

When i export it using a Mjpeg compression, it only gets to 10 seconds in to the episode through compression and its already 300mb, i dont see why, its not acually as good quality and all ive done is added a crop filter, ive tried it with a normal windows compression and with no audio and no filters but its still the same. one episode will be 6GB at this rate.

Scintilla · Post by **Scintilla** » Fri Feb 23, 2007 5:47 pm

Because MJPEG doesn't use temporal (inter-frame) compression, like distribution codecs such as MPEG-1, DivX/XviD, etc. do. It's basically just applying a round of JPEG compression to each frame separately.

If you want smaller MJPEG files (keeping resolution constant), basically your only real option is to turn down the quality setting(s) in the codec configuration.

McDoogle-san · Post by **McDoogle-san** » Sat Feb 24, 2007 6:47 am

well i dont understand why my episode 9 is Mjpeg compression, has the same quality and same resolution as the DivX episodes but its 20mb smaller than them.

McDoogle-san · Post by **McDoogle-san** » Mon Feb 26, 2007 11:08 am

i really o want to get this sorted out, can anyone help me?

*bump*

BasharOfTheAges · Post by **BasharOfTheAges** » Mon Feb 26, 2007 12:15 pm

does it really matter? these are just preview files, right?