Comment to 'how to change the default bitrate for video encoding'
Comment to how to change the default bitrate for video encoding

  • Ok I'm crazy. I found it in /inc/classes/BxDolTranscoderVideo.php. Is this the only code that I need to change to raise the 512 bitrate?

    Lines 156 -168:

        protected function applyFilter_Mp4 ($sFile, $aParams)

        {

            return $this->_convertVideo($sFile, $sFile, '.mp4', $aParams, array (

                'strict' => 'experimental',

                'vcodec' => 'libx264',

                's' => $this->_getOptionSizeForVideo ($sFile, $aParams),

                'b:v' => isset($aParams['video_bitrate']) ? $aParams['video_bitrate'] . 'k' : '512k',

                'movflags' => '+faststart',

                'acodec' => 'aac',

                'ar' => '44100',

                'b:a' => isset($aParams['audio_bitrate']) ? $aParams['audio_bitrate'] . 'k' : '128k',

            ));

        }

    • So in the end did you get good results, if so, what settings did you change?

      • 4k is too much for streaming so I used 1080p. I changed 512k to 4000k and then I updated the database with:

        Serialized MySQL query:

        UPDATE `sys_transcoder_filters` 

          SET  `filter_params` =  'a:3:{s:1:"h";s:4:"1080";s:10:"force_type";s:3:"mp4";s:14:"ffmpeg_options";a:1:{s:7:"threads";i:14;}}' 

          WHERE `transcoder_object` =  'bx_videos_video_mp4' AND  `filter` =  'Mp4';

        Unserialized MySQL query:

        array (

          'h' => '1080',

          'force_type' => 'mp4',

          'ffmpeg_options' => 

          array (

            'threads' => 14,

          ),

        );

        • Thank you