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Adobe Media Encoder FLV issue

Feb 2, 2009 9:52 AM

I am posting this question here because there is no Adobe Media Encoder forum - sorry! My question is about file sizes. I created some videos in Premiere CS4. I need to convert the videos to FLV formats (they are to be used in an e-learning module that requires FLV files). However, I'm having trouble with the file sizes. At the rate it's going, I will max out our server space in no time.

To give an example, I have a 17 second video with an original frame size of around 720 x 480. When exported as a MOV file (high quality, etc.) it's about 66MB. I've tried creating the FLV straight from the Premiere project file, as well as separately, by running the MOV through Adobe Media Encoder and the results are just about the same. In either case, I can't get the file size anywhere below 1.8MB, which seems rather large for a web compressed 17 second video. The file size DOES NOT get smaller when rendering at the smaller frame size of about 300 x 220. Back when I used to use Sorenson Squeeze for web compression, changing the frame size like that would usually cut the video file size in half. Media Encoder leaves the file size the same...

I hadn't worked with video in a little while, so Adobe Media Encoder is new to me... but I asked my husband about this. He's a web developer and deals with video a lot. He said that he would take a MOV file, drop it into Flash Video Encoder and use the preset for FLV and it works great - a video that's this long should only be about a few hundred k in size (it's not a complicated/lots of transition video). Apparently Adobe Media Encoder has replaced Flash Video Encoder, so I don't have the option of trying it the other way... has anyone else run into this, and if so, do you have any tips?

Thanks so much!
945 Views   5 Replies   Latest reply: acidhimp, Mar 6, 2012 1:17 AM
 
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    1. (Gabriel_Lam),
    Feb 2, 2009 9:59 AM   in reply to (Kim_Marie_Gosnell)
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    you should change the Bitrate to something like 512KBps if rendering about 576x360. also, see if changing the codec from sorenson squeeze to On2VP6 works.
    Now, i dont know how many things are going on during that 17 second video but changing the bitrate will help. Oh, and use VBR instead or CBR. Hope this acomplishes your needs.
     
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    2. (Kim_Marie_Gosnell),
    Feb 2, 2009 10:30 AM   in reply to (Kim_Marie_Gosnell)
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    Thanks for the tips - I'll try them.
     
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    3. (Kim_Marie_Gosnell),
    Feb 2, 2009 11:28 AM   in reply to (Kim_Marie_Gosnell)
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    That did bring it down some, but there is still NO change in file size when I change the dimensions. In my previous experience, changing the frame size of a video to half would also change the file size... is this an Adobe Media Encoder bug or something? It's hard to believe that a video exported at 300 x 219 should not be any smaller in file size than the same one at 655 x 480. Any clues?
     
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  • Colin Brougham
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    4. Colin Brougham,
    Feb 2, 2009 11:36 AM   in reply to (Kim_Marie_Gosnell)
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    Kim,

    Frame size has absolutely no correlation to file size. Bitrate, on the other hand, has a direct correlation to file size. If your bitrate is 500kbps (that's "kilobits per second"), it doesn't matter if your frame size is 200x100, 640x480, or 1000000x1000000: you're always putting 500kbps (that's "kilobits per second") into the file. That's why the file size doesn't change. Now, there's a practical limit, because quality goes down as compression goes up and bitrate goes down, and there's always some file overhead, but that's the general gist of it.

    It's the principle of conservation of matter... applied to digital video :)
     
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  • acidhimp
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    5. acidhimp,
    Mar 6, 2012 1:17 AM   in reply to Colin Brougham
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    I'm having a similiar issue, my file orginally is only 10sec long and 13mb *.mpg file, the same as it was when I was converting in CS4, only back then, the convertion took maybe a minute and the output file size was about 1mb or smaller, and that was keeping the 640x480 size and removing audio.  Now with CS5, the estimated output size is anywhere from 2000-3000mb for starts, remove audio and scale back other settings and I can get it down to 70mb and takes a staggering 2.5hrs to complete...for a 10sec video.  I don't know what they changed between cs4 and 5 but they screwed up big time, this is a joke.  i'm on AME ver.  5.5.1.12(64-bit) if that makes any difference.  any idea or help would be greatly appreciated, I've got about 5 of these 10sec vids to convert a month and I need to get this fixed.

     
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