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DivX files turning out smaller than they are
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maggas
Junior Member
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3. January 2003 @ 18:36 |
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For a while now my divx files that i make are less than the bitrate i specify. For example if i specify 800kbit/s (100kb/s) and the file is 10 sec long i expect the video file to be 800kb, but it turns out 500kb. I dont know why. For Long movies that i want to turn out 700mb they come out 600mb and checking the properties of the file, the bitrate of the file is less than what i specified, HELP ME
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maggas
Junior Member
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3. January 2003 @ 18:41 |
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Forgot to mention i use virtual dub, but it should not matter what i use, but i never know
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Khisanth
Member
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4. January 2003 @ 05:22 |
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I don't if I'm right or how much sense it makes but divx uses compression, so I imagine that it recudes the redundant code in the video and might be a little be less than what you thought. a movie file is normall comprised of an audio and video bitrate, but then I think divx compresses it . . . . does that sound right?
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maggas
Junior Member
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4. January 2003 @ 07:22 |
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Sorry but what you said is a bit silly, as i specified the divx file to be eg. 800kbit/s and it turned out 500kbit/s (thats definatelly a problem there) and its different bitrates with different sized files
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Khisanth
Member
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4. January 2003 @ 08:19 |
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my apologies then, I misread your question or actually when I went to send a response I was interrupted and my response got skewed in my head. sorry. But if i'm not mistaken divx does compress using an algorhythm like winzip and rar, so that might change things. not sure.
In the land of the Blind the one-eyed man is king
This message has been edited since posting. Last time this message was edited on 4. January 2003 @ 08:21
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VCDjunkie
Moderator
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4. January 2003 @ 15:41 |
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what codec are you using to encode, and what version ??
"I'll show you just how deep the rabbit hole really goes.." -Morpheus
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maggas
Junior Member
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5. January 2003 @ 00:13 |
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Im using divx 5.02, the adware version :(
(((Dont worry about it Khisanth)))
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VCDjunkie
Moderator
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5. January 2003 @ 16:43 |
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"I'll show you just how deep the rabbit hole really goes.." -Morpheus
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maggas
Junior Member
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7. January 2003 @ 06:01 |
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Yes its the guide im using. The problem is not getting from dvd to divx but the final divx file made, being too small. Eg using the bitrate calculator it tells me i should have the video at 1200kbit/s to get a 700mb file. But my file becomes more like 500mb at the end.
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VCDjunkie
Moderator
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7. January 2003 @ 08:02 |
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if you are following the guide verbatim, you should end up with a Variable Bitrate after 2 passes, not a single CBR.
"I'll show you just how deep the rabbit hole really goes.." -Morpheus
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maggas
Junior Member
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8. January 2003 @ 11:58 |
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Yes I do get a variable bit rate but it should average out to the bitrate i specified, like it used to. When u want a file to be 300mb u use the bitrate calculator, it tells u put 1259kbit/s to get a 300mb file for that specific time and audio
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hallmofo
Newbie
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8. January 2003 @ 23:29 |
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Just a thought - are you choosing the correct value for the AUDIO bitrate in the calculator?
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maggas
Junior Member
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9. January 2003 @ 04:11 |
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yes, as ive said it worked fine for ages and the last couple of weeks it turns out too small. If i go to the properties of the file the bitrate of the video is less than what i specified eg i specified 800kbit/s (100kb/s) the file says 80kb/s
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Khisanth
Member
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9. January 2003 @ 13:55 |
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maybe this is too simple but have you tried uninstalling, rebooting and then reinstalling the software you use for converting and such?
In the land of the Blind the one-eyed man is king
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maggas
Junior Member
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10. January 2003 @ 09:19 |
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hehehe yes i have 3 times actually :) Do you reckon there is a bug in divx, well if ive reinstalled it, it must be something else
This message has been edited since posting. Last time this message was edited on 10. January 2003 @ 09:20
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wjd
Suspended due to non-functional email address
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10. January 2003 @ 15:53 |
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I'm having the same problem! Everything was fine up until a day or two ago and I just can't understand it. I'm following exactly the same procedure as before, which always resulted in files at the specified file size (give or takes a MB or 2). I haven't changed any software, though I have installed a new hard drive and faster CPU but they can't be responsible! I managed to create 1 file today which was on target for size but about 6 others aren't. Must be a bug but I can't figure it out.
I'm using DivX Pro 5.02 btw.
Thanks,
Will
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bang
Junior Member
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10. January 2003 @ 19:56 |
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With single pass the codec tries to give constant quality within the bitrate specification, but CQ can only be achieved through two pass. Use 2-pass if the correct bitrate is important to you. If you are not aware, different parts of the same movie are more difficult to compress. With very low bitrates its simply a matter of hit and miss.
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wjd
Suspended due to non-functional email address
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11. January 2003 @ 02:03 |
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Like maggas, I am using a 2 pass encoding method and I have had no problems encoding to a specified file size before. My method hasn't changed so more any ideas?
Thanks for the input though.
Will
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maggas
Junior Member
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11. January 2003 @ 02:44 |
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Finally someone with the same problem, join the club wjd :) Nothing will fix it even reinstallation, if i cant do anything else i might reinstall windows, but what if the problem happens again, i cant keep on reinstalling windows!
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wjd
Suspended due to non-functional email address
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11. January 2003 @ 02:51 |
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Well I might try and restore my working hard drive image and then see if I can spot the difference but I can't see how anything has changed.
I wondered if it was anything to do with the files generated from the first pass. Perhaps they aren't being written correctly so the second pass isn't working with correct data. I dunno, it's causing me a lot of grief and you seem to be the only other one I've found with this problem!
Will
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maggas
Junior Member
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12. January 2003 @ 07:43 |
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its definatlly something wrong with the second pass, ive notified divx industries and still waiting for a response
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wjd
Suspended due to non-functional email address
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13. January 2003 @ 05:49 |
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I've now noted that it has nothing to do with performing a fast or slow recompress (VirtualDub settings). But other than that, I've got no further.
Any response from DivX?
Will
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wjd
Suspended due to non-functional email address
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14. January 2003 @ 07:10 |
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I found this thread and I wondered if it exaplains our situation.
http://forums.afterdawn.com/thread_view.cfm/4192
I'm not convinced because I've not encounted this problem before and I've re-encoded loads of movies before. Now suddenly all movies I attempt have file sizes far smaller than specified.
I'm of to see what xvid is like...hmmm.
Will
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maggas
Junior Member
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14. January 2003 @ 08:05 |
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Same Ive made a few dozen movies and music videos and no problem until now, No response from divx yet :(
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maggas
Junior Member
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14. January 2003 @ 08:06 |
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Same Ive made a few dozen movies and music videos and no problem until now, No response from divx yet :( Xvid is not as "user friendly" and is basically just hacked divx, sort of
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