Newest 'ffmpeg' Questions - Stack Overflow

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  • GIF created from a movie file with ffmpeg is really large in size

    1er décembre 2014, par drN

    I created a GIF using ffmpeg using the following command:

    ffmpeg -i foo.mp4 -ss 00:00:18 -t 00:00:06 -pix_fmt rgb24 bar.gif

    However, the resulting bar.gif was over 300 MB in size while the movie file foo.mp4 was about 15 MB!

    What gives?

  • IP camera with RTSP on the web, RED5 and ffmpeg

    1er décembre 2014, par user3540118

    i have a ip camera with rtsp protocol and i want to stream on the web using flash video. I know i can use vlc but i do not want to use that.

    I installed red5 and ffmpeg for convert RTSP to RTMP

    ffmpeg -i "rtsp://46.13.85.43:8020/ch0.h264" -f flv -r 25 -s 640x480 -an "rtmp://localhost/live"

    and result is: UDP timeout. retrying with TCP

    Any idea where is the problem ?

  • ffmpeg is not creating screenshot from video

    1er décembre 2014, par hitesh

    I need to create a screen shot from video,

    I have followed this tutorial to do the intial setup

    1) I downloaded the ffmpeg from here -[ http://ffmpeg.zeranoe.com/builds/ ] for 64 bit operating system.

    2) I followed the https://www.youtube.com/watch?v=gU49GiWGGAI , video and did all configuration successfully and phpinfo() shows that ffmpeg has been installed.

    3) Then I tried this to find out whether it is working or not,

    It worked successfully

    4) Next I followed this video tutorial here , but for some reason video thumbnails are not created.

    Not able to find the problem, I don't see any error also.

    below is my code 

    /**
 * FFMPEG-PHP Test Script
 *
 * Special thanks to http://www.sajithmr.me/ffmpeg-sample-code for this code example!
 * See the tutorial at http://myownhomeserver.com on how to install ffmpeg-php.
 */
error_reporting(1);
error_reporting(E_ALL ^ E_NOTICE);
// Check if the ffmpeg-php extension is loaded first
extension_loaded('ffmpeg') or die('Error in loading ffmpeg');

// Determine the full path for our video
$vid = realpath('./videos/myvideo.mp4');
$videosize = filesize($vid);
$remoteVideo = 'http://video-js.zencoder.com/oceans-clip.mp4';

//ffmpeg

$ffmpeg = dirname(__FILE__) . "\bin\\ffmpeg";
$imageFile = "1.png";
$image2 = "2.png";
$size = "120x90";
$getfromsecond = 7;
$cmd = "$ffmpeg -i $vid -an -ss $getfromsecond -s $size $imageFile";
$cmd2 = "$ffmpeg -i $remoteVideo -an -ss $getfromsecond -s $size $image2";
if(!shell_exec($cmd)){
    echo "Thumbnail created";
}else{
    echo "Error Creating thumbnail";
}

if(!shell_exec($cmd2)){
    echo "Thumbnail for remote url was created";
}else{
    echo "Error Creating thumbnail for remote url ";
}

      OUTPUT
    Thumbnail created
    Thumbnail for remote url was created

    Please help me solve this issue.

  • convert rmvb (rv40) to mp4 with ffmpeg ? [on hold]

    1er décembre 2014, par Wang

    When I try to convert rmvb to mp4, It always get some errors: New frame but still xxx MB left.concealing xxx DC, xxx AC, xxx MV errors What is the problem?

    ffmpeg version 0.10.12-7:0.10.12-1~precise1 Copyright (c) 2000-2014 the FFmpeg developers
  built on Apr 26 2014 09:49:36 with gcc 4.6.3
  configuration: --arch=amd64 --disable-stripping --enable-pthreads --enable-runtime-cpudetect --extra-version='7:0.10.12-1~precise1' --libdir=/usr/lib/x86_64-linux-gnu --prefix=/usr --enable-bzlib --enable-libdc1394 --enable-libfreetype --enable-frei0r --enable-gnutls --enable-libgsm --enable-libmp3lame --enable-librtmp --enable-libopencv --enable-libopenjpeg --enable-libpulse --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-vaapi --enable-vdpau --enable-libvorbis --enable-libvpx --enable-zlib --enable-gpl --enable-postproc --enable-libcdio --enable-x11grab --enable-libx264 --shlibdir=/usr/lib/x86_64-linux-gnu --enable-shared --disable-static
  libavutil      51. 35.100 / 51. 35.100
  libavcodec     53. 61.100 / 53. 61.100
  libavformat    53. 32.100 / 53. 32.100
  libavdevice    53.  4.100 / 53.  4.100
  libavfilter     2. 61.100 /  2. 61.100
  libswscale      2.  1.100 /  2.  1.100
  libswresample   0.  6.100 /  0.  6.100
  libpostproc    52.  0.100 / 52.  0.100
Hyper fast Audio and Video encoder

  • How to build fdk-aac for ios's arm64 architecture ?

    1er décembre 2014, par 谢小进

    I have built fdk-aac for iOS, including x86_64, i386, armv7, and armv7s, failed to build to arm64 architecture. I have sent email to the author of fdk-aac but he said he won't support arm64. Does anybody know how to build for arm64?

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