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  1. Member
    Join Date
    May 2009
    Location
    Canada
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    Hello people,

    Im new to this whole FFMPEG stuff. So please dont mind my nooby questions.

    I am trying to convert .avi videos into .flv but at the same time trying to keep a small file size and a decent quality.
    Here the command line im using:
    ffmpeg -i video.avi -y -ab 64k -ar 44100 -ac 1 -vcodec libx264 -r 15 -s 320×240 -b 500 -vol 500 -cmp 3 -subcmp 3 -mbd 2 -partitions +parti4x4+partp8x8 -flags2 +mixed_refs -subq 5 -trellis 1 -refs 5 -me_range 16 -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71 -qcomp 0.6 -coder 1 -g 250 -qblur 1.3 output.flv

    That coverts the files pretty well and fast, but the problem is the videos are blocky even with qblur option.

    Can anyone suggest anything?

    I tried mencoder instead but its taking longer to convert the files and also about 2-3 times larger.

    any help is appreciated.
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  2. I'm a MEGA Super Moderator Baldrick's Avatar
    Join Date
    Aug 2000
    Location
    Sweden
    Search Comp PM
    what ffmpeg version? it may help to upgrade to a newer version.
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  3. Member
    Join Date
    May 2009
    Location
    Canada
    Search Comp PM
    Thanks Baldrick,
    its the latest version, was just installed yesterday
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  4. Member ChrissyBoy's Avatar
    Join Date
    Feb 2003
    Location
    Yorkshire!
    Search Comp PM
    Code:
    -b 500
    shouldn't bitrate be: -b 500k for 500 kbs ?

    Anyway eitherway perhaps increase this value.
    SVCD2DVD v2.5, AVI/MPEG/HDTV/AviSynth/h264->DVD, PAL->NTSC conversion.
    VOB2MPG PRO, Extract mpegs from your DVDs - with you in control!
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  5. Member
    Join Date
    Nov 2007
    Location
    United Kingdom
    Search Comp PM
    Hi IMC
    I'm fairly new to all this too.
    Originally Posted by ChrissyBoy
    shouldn't bitrate be: -b 500k for 500 kbs ?
    Anyway eitherway perhaps increase this value.
    Definately. Using -b 500 gives a very low bitrate. It's expecting a value like -b 500k. Now, there may be issues I am unaware of, but for most of my conversions I use -qscale to determine image quality rather than specifying a bitrate (1 is perfect, 2 is very good, 5 fair etc). The resulting files will be bigger as the quality is increased. Suggest you try -qscale 5 and go from there.
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