How can I tell which options yield the best video compression and quality using Avs4You?

Ray Nelson April 8, 2010
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I use Avs4You software to convert videos.
There are so many options. How can I tell which is best for compression with reasonable quality? Been looking for a good article that logically arranges them. Obviously smaller size, and slower frame rates compress more, but how to rate them without trying each. Been there, done that, still not definitive answers.

  1. Anonymous
    April 11, 2010 at 3:22 pm

    Ok, I took some time to make a small presentation. From what is here note: for what I am doing the Optimal quality FLV format achieves 10x size reduction and takes 1/15th as much time to convert as WMV at 29fps. The drop in conversion time is significant (90 sec to 6 sec WOW!!!), otherwise I would use the WMV . Quality is a little less, but for what I am doing, looks just fine (my 84 year old mom will know see difference). This means I can send a 2 minute video in Yahoo mail and a 5 minute in G-mail.

    Hope this makes it easier for others who read this.

    Convert
    type Description time Size-Bytes
    avi see ** below 55,326
    flv Best Quality 58 8,638
    mp4 m4v ipod 34 8,441
    mp4 iso v.2 34 8,440
    flv Normal Quality 44 6,803
    flv Optimal Quality 6 5,982
    wmv 29fps 90 5,490
    wmv 20fps 61 5,444
    flv Low Quality 6 5,037

    **
    Length in seconds 52
    Frame Width 640
    Frame height 480
    Data Rate 8791
    Total Bit Rate 8855
    Frame Rate 30

    • Anonymous
      April 11, 2010 at 3:22 pm

      Darn, it took my spacing out. Sorrrrrry.

    • Anonymous
      April 11, 2010 at 3:26 pm

      Looks fine in editor..... oh well, best I can do.

      • Aibek
        April 12, 2010 at 8:12 am

        Hey Ray,

        Thanks a ton for sharing this details with us. Next time someone asks a similar question we'll direct them right here.

        Aibek

        • Anonymous
          April 14, 2010 at 3:33 pm

          May be this trick will display data better:

          Convert
          type _ Description _ _ _ _time Size-Bytes
          avi _ _ see ** below _ _ _ _ _ _ _ 55,326
          flv _ _Best Quality _ _ _ _ 58 _ _ _ 8,638
          mp4 _ _ m4vipod _ _ _ _ _34 _ _ _ 8,441
          mp4 _ _ isov.2 _ _ _ _ _ _ _34 _ _ _ 8,440
          flv _ __NormalQuality _ _ _44 _ _ _ 6,803
          flv _ _OptimalQuality _ _ _ 6 _ _ _ 5,982
          wmv _ _ 29fps _ _ _ _ _ _ _90 _ _ _5,490
          wmv _ _ 20fps _ _ _ _ _ _ _61 _ _ _ 5,444
          flv _ _ LowQuality _ _ _ _ _6 _ _ _5,037

          **
          Length in seconds _ _ 52
          Frame Width _ _ _ _ 640
          Frame height _ _ _ _ 480
          Data Rate _ _ _ _ _ 8791
          Total Bit Rate _ _ _ 8855
          Frame Rate _ _ _ __ _ 30

  2. Anonymous
    April 11, 2010 at 1:52 pm

    Aibek: Your references were just superb. Wish that article would have come up when I searched. Now I know what most of the terminology means.

  3. Anonymous
    April 11, 2010 at 1:17 pm

    Thank you both for responding.

    Taty: what got me started was trying to send an email of my grand-kids to my brother so he could show it to my mother. No more money for DVD's.

    Aibek: Thank you for your reference. I will go thru it in detail. Being an unemployed computer guru (MS Visual Studio Programmer) I have plenty of time.

    Now for some more results.

    I found a .wmv set up that reduced size by another factor of 2. (total size reduction is now 1/14th original). It is "Windows Media Advanced 9" on the menu offered. I keep the frame size same as input. Frame Rate is 29,97 and bit rate 720. (whatever that means). Quality remains very good but the .wmv format takes 3x as long to encode. I used to use Nero, but those files came out 10x bigger!! Logged it with them and they say they were able to reproduce it, but alas, never did get a resolution.

    I will report back on what I find. (obviously if you have a super high res movie, then you will not get these results.)

  4. Aibek
    April 10, 2010 at 5:13 pm

    Ray,

    I addressed video format/quality ratio in one of the earlier questions. Check out my comments @ Can you recommend a video converter that allows to limit the output file size?.

  5. Taty
    April 10, 2010 at 4:57 pm

    The main question is, what are you compressing it for? Compression for email is vastly different from compression for streaming video or website use. Which is obviously different from compression for computer play. Which compression do you need?

  6. Anonymous
    April 9, 2010 at 10:26 pm

    Well I took a small movie and started playing with it. Found nothing too good in .mpg and .avi, but .mp4 achieved compression (movie directly from camera) by factor of 7 (ie filesize after was 1/7th (approx) of that before.) So for now will use that to get my files small enough to e-mail. Only problem is .mp4 is not universally displayed on windows machines and needs codec. But that is available in K-lite package.

    Still would like more information.

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