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Sur d’autres sites (13252)

  • Centos Video Optimizer

    2 février 2012, par Arjun Neras

    I have a lot of MP4 files on my server. And my aim is to get them to stream on android mobiles.

    The resolution of the videos are at 480×272 and this is not a problem because I tested it and most androids are able to stream it. But the problem is the size of the video. The streaming is slow and it buffers a lot because of its size.

    I need a converter that can decrease the size to around 50-60MB. With only a little decrease in quality. If possible, the output file should overwrite the input file.

    Can you think of any way I can do this work in minimum time ? My server is CENTOS and I have FFMPEG, MP4Box installed.

  • split the video in several part using ffmpeg

    2 février 2012, par Himiko

    I want to write a small program with help of ffmpeg. I want to process a video by cut the video into several parts, left part, right part...etc.
    How can I do it using ffmpeg ? By the way, are there any documentation explain the API of the ffmpeg ?

  • Video converted to FLV using FFMPEG gets 0 size

    11 novembre 2011, par Sudhir

    I'm trying to convert avi file to flv format using FFMPEG on server, but its giving me problems. On conversion, the file is converted to flv format but no data (0 kb size file). Tried debugging the code but could not. The FFMPEG is installed in CentOS, in path /usr/bin/ffmpeg, and i'm using following command for conversion :

    $srcFile = "/home/mydomain/public_html/demo/test/sample.avi" ;
$destFile = "/home/mydomain/public_html/demo/test/sample_again.flv" ;

    $ffmpegPath = "/usr/bin/ffmpeg" ;
    
$flvtool2Path = "/usr/local/bin/flvtool2" ;
    

    $command = $ffmpegPath . " -y -i " . $srcFile .  " -ar 32000 -ab 32000 -f flv -s 320x240 ".
    
$destFile . " | " . $flvtool2Path . " -U stdin " . $destFile ;
    

    exec($command, $output) ;
    
print_r($output) ;

    I tried doing :

    exec("which ffmpeg") ;

    And it gave me the path /usr/bin/ffmpeg, but get following error when i execute the code :

    Array ( 
[0] => ERROR : undefined method `timestamp' for nil:NilClass 
[1] => ERROR : /usr/local/cpffmpeg/lib/ruby/site_ruby/1.8/flv/stream.rb:285:in `lasttimestamp' 
[2] => ERROR : /usr/local/cpffmpeg/lib/ruby/site_ruby/1.8/flv/stream.rb:274:in `duration' 
[3] => ERROR : /usr/local/cpffmpeg/lib/ruby/site_ruby/1.8/flvtool2/base.rb:181:in `add_meta_data_tag' 
[4] => ERROR : /usr/local/cpffmpeg/lib/ruby/site_ruby/1.8/flvtool2/base.rb:137:in `update' 
[5] => ERROR : /usr/local/cpffmpeg/lib/ruby/site_ruby/1.8/flvtool2/base.rb:47:in `send' 
[6] => ERROR : /usr/local/cpffmpeg/lib/ruby/site_ruby/1.8/flvtool2/base.rb:47:in `execute !' 
[7] => ERROR : /usr/local/cpffmpeg/lib/ruby/site_ruby/1.8/flvtool2/base.rb:46:in `each' 
[8] => ERROR : /usr/local/cpffmpeg/lib/ruby/site_ruby/1.8/flvtool2/base.rb:46:in `execute !' 
[9] => ERROR : /usr/local/cpffmpeg/lib/ruby/site_ruby/1.8/flvtool2/base.rb:206:in `process_files' 
[10] => ERROR : /usr/local/cpffmpeg/lib/ruby/site_ruby/1.8/flvtool2/base.rb:44:in `execute !' 
[11] => ERROR : /usr/local/cpffmpeg/lib/ruby/site_ruby/1.8/flvtool2.rb:168:in `execute !' 
[12] => ERROR : /usr/local/cpffmpeg/lib/ruby/site_ruby/1.8/flvtool2.rb:228 
[13] => ERROR : /usr/local/bin/flvtool2:2:in `require' 
[14] => ERROR : /usr/local/bin/flvtool2:2 
)

    What could be the problem. Is this the problem of Flvtool2, if yes then what is it. Please suggest something

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