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Thread: HOWTO: Install and use the latest FFmpeg and x264

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  1. #1
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    HOWTO: Install and use the latest FFmpeg and x264

    This guide has been moved to the official FFmpeg wiki:

    How to Compile FFmpeg and x264 on Ubuntu

    The guide will be kept up to date and all supported Ubuntu versions will be included.
    Last edited by FakeOutdoorsman; July 2nd, 2013 at 10:42 PM.

  2. #2
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    Re: HOWTO: Compile the latest ffmpeg and x264 from source

    Great guide. Thanks a lot. One problem:

    When I configure x264 I get the error:
    Code:
    ./configure --enable-pthread --enable-mp4-output --enable-shared
    No suitable assembler found.  x264 will be several times slower.
    Please install 'yasm' to get MMX/SSE optimized code.
    I tried nasm and yasm from the repos but they didn't work

    But I figured it out!

    All I had to do was go to:
    http://www.tortall.net/projects/yasm/wiki/Download

    Grab the 0.7.0 tarball, then ./configure, make, sudo checkinstall, then build x264, then ffmpeg. Now I can encode much faster.

    A note to those who are interested:

    I used the ffmpeg encoding script:
    Code:
    #!/bin/sh
    ffmpeg -i $1 -y -an -pass 1 -vcodec libx264 -threads 4 -b 1024kbps -flags +loop -cmp +chroma -partitions +parti4x4+partp8x8+partb8x8 -me epzs -subq 1 -trellis 0 -refs 1 -bf 3 -b_strategy 1 -coder 1 -me_range 16 -g 250 -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71 -rc_eq 'blurCplx^(1-qComp)' -qcomp 0.6 -qmin 10 -qmax 51 -qdiff 4 $2
    
    ffmpeg -i $1 -y -acodec libfaac -ab 128k -pass 2 -vcodec libx264 -threads 4 -b 1024kbps -flags +loop -cmp +chroma -partitions +parti4x4+partp8x8+partb8x8 -flags2 +mixed_refs -me umh -subq 5 -trellis 1 -refs 5 -bf 3 -b_strategy 1 -coder 1 -me_range 16 -g 250 -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71 -rc_eq 'blurCplx^(1-qComp)' -qcomp 0.6 -qmin 10 -qmax 51 -qdiff 4 $2
    Which can be run:
    Code:
    ./scriptname myfile.avi myfile.mp4
    And the result plays in Flash 9 using their h264 playback stuff. Pretty neat and high quality too.
    Knowledge is half the battle.
    The other half is violence!

  3. #3
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    Re: HOWTO: Compile the latest ffmpeg and x264 from source

    Quote Originally Posted by Paerez View Post
    Great guide. Thanks a lot. One problem:

    When I configure x264 I get the error:
    Code:
    ./configure --enable-pthread --enable-mp4-output --enable-shared
    No suitable assembler found.  x264 will be several times slower.
    Please install 'yasm' to get MMX/SSE optimized code.
    I tried nasm and yasm from the repos but they didn't work

    ...
    Thanks for pointing that out. I'll update it with a section on yasm compilation. Was the error the same if you tried using just nasm?

    As of March 14, '08 (I think), x264 requires a newer yasm >= 0.6.0 than what is in the Ubuntu universe repository (yasm 0.5.0). x264 should fallback to nasm if yasm isn't detected and worked for me just fine despite the following error:
    Code:
    ./configure: 330: yasm: not found
    If I omitted nasm, I got the same error as you. I'm not sure why nasm worked for me and not for you.

    Before I wrote this tutorial I tested the speed of x264 either using a compiled yasm 0.7.0, nasm from the repository, or no assembler. The speed differences were very small between compiled yasm and nasm from the repo:
    x264/mencoder/ffmpeg on a dual quad core.

    Edit: Tutorial updated with yasm compilation.
    Last edited by FakeOutdoorsman; May 13th, 2008 at 12:11 AM.

  4. #4
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    Re: HOWTO: Compile the latest ffmpeg and x264 from source

    I tried using both nasm and yasm from the repos, and x264 would compile but it would say it was building without support for yasm and nasm.

    Then, when I used it to convert a file it would say that it was using no cpu extensions, as opposed to saying "MMX SSE ...". It would also take significantly longer (like 2-5 times as long).

    But just installing the yasm from source fixed it, and it wasn't very difficult to do.
    Knowledge is half the battle.
    The other half is violence!

  5. #5
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    Re: HOWTO: Compile the latest ffmpeg and x264 from source

    Thanks a million. Great in depth job on this one.

  6. #6
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    Re: HOWTO: Compile the latest ffmpeg and x264 from source

    This is a great howto, since in my opinion ffmpeg is broken due to these issues.

    Therefore, what are the additional steps to fully replace ffmpeg, x64 and the libx264 packages such that it satisfies dependencies for other applications that use ffmpeg and my update manager does not keep asking me to upgrade from the checkinstall packages?

  7. #7
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    Re: HOWTO: Compile the latest ffmpeg and x264 from source

    Quote Originally Posted by Paerez View Post
    I tried using both nasm and yasm from the repos, and x264 would compile but it would say it was building without support for yasm and nasm.

    Then, when I used it to convert a file it would say that it was using no cpu extensions, as opposed to saying "MMX SSE ...". It would also take significantly longer (like 2-5 times as long).

    But just installing the yasm from source fixed it, and it wasn't very difficult to do.
    when I try to enable yasm in ffmpeg it is giving me an error that "yasm not found" how can I solve this problem..? Any one please suggest me

  8. #8
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    Re: HOWTO: Compile the latest ffmpeg and x264 from source

    Did you install yasm first?

  9. #9
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    Re: HOWTO: Compile the latest ffmpeg and x264 from source

    tried the above, it installed but still my vidoes don't play, something about ffmpeg version r19000 or above required, any idea?

  10. #10
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    Re: HOWTO: Compile the latest ffmpeg and x264 from source

    Quote Originally Posted by akemzo View Post
    tried the above, it installed but still my vidoes don't play, something about ffmpeg version r19000 or above required, any idea?
    That's not much to work with so I'm going to need more information before I can even make a guess:

    • What version of Ubuntu are you using?
    • What are you using to play the videos?
    • Are there any error messages?
    • What's telling you that r19000 or above required?

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