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• ffplay / ffmpeg with audio and video filters

  20 juillet 2018, par user10104150

  i tried to modify a already existing code for ffplay for hours, but I could not get it.
  I could not find a manual for vertical and horizontal stacking parameters. I’m always getting invalid argument errors when I try to adopt it to my needs.
  So I’m asking here for help.

  My idea is based on that : ffplay / ffmpeg setup table with audio and video filters

  The working code that I modified a little but want to modify further without luck is :

  ffplay -f lavfi \
  
           "amovie=in.mp4,asplit=3[sv][eb][av]; \
  
            [sv]showvolume=b=4:f=0:ds=log:c=VOLUME:w=720:h=68[sv-v]; \
  
            [eb]ebur128=video=1:size=720x540:meter=18[eb-v][out1]; \
  
            [av]avectorscope=s=720x540:zoom=1.3:rc=2:gc=200:bc=10:rf=1:gf=8:bf=7[av-v]; \
  
            [sv-v][eb-v][av-v]vstack=3[1c]; \
  
            movie=in.mp4,split=4[v][wf][wfc][vs]; \
  
            [wf]waveform=m=1:d=0:r=0:c=7[wf-vus]; \
  
            [wf-vus][v]scale2ref=iw:1220-ih[wf-va][sig]; \
  
            [wf-va]setsar=1[wf-v]; \
  
            [wfc]waveform=m=0:d=0:r=0:c=7,scale=610x610,setsar=1[wfc-v]; \
  
            [vs]vectorscope=m=color3:g=color,scale=610x610,setsar=1[vs-v]; \
  
            [sig][wf-v]vstack[2c]; \
  
            [wfc-v][vs-v]vstack[3c]; \
  
            [1c][2c][3c]hstack=3,scale=1920:-1[out0]"

  I’d like to change it to that style - I’m not yet allowed to post images directly in this question, so I need to link it :

  Link to image how I’d like the layout to be

  I’d like to have the video shown in 1920x1080 (keeping aspect ratio, downscale if necessary).

• how to put php variable to convert to mp3

  23 mai 2019, par NAVJOT SINGH

  I am trying to convert mp4 to mp3 using ffmpeg.

  I want to upload the mp4 file from user then convert the same to mp3

  if(isset($_POST['uploadimage'])){
  
    $file_name = $_FILES['image']['name'];
  
    $file_size = $_FILES['image']['size'];
  
    $file_tmp = $_FILES['image']['tmp_name'];
  
    $file_type = $_FILES['image']['type'];
  
    $file_ext=strtolower(@end(explode('.',$_FILES['image']['name'])));
  
  
  
    $extensions= array("mp4");
  
  
  
    if(in_array($file_ext,$extensions)=== false){
  
       $errors[]="extension not allowed, please choose a JPEG file.";
  
     }
  
    else if($file_size > 2097100) {
  
       $errors[]="larger size";
  
       }
  
   else if(empty($errors)==true) {
  
       move_uploaded_file($file_tmp,"input/".$file_name);
  
       echo"moved";
  
       $a= "input/".$file_name;
  
       echo $input_file;
  
       $b= "output/audio2.mp3";
  
       exec("ffmpeg.exe");
  
        exec("ffmpeg -i $a -vn $b", $output, $return);
  
        if (!$return) {
  
        echo " Success";
  
        } 
  
       else {
  
       echo " <br />failed";
  
       }
  
       }
  
       } 
  
       <form method="post" enctype="multipart/form-data">
  
       <input type="file" />
  
       <input type="submit" value="Submit" />
  
       </form>

  session not created
  Above is an error I’m getting.

• avfilter/scale_eval : Reduce rounding error.

  26 septembre 2022, par Tristan Schmelcher

  avfilter/scale_eval : Reduce rounding error.
  When force_original_aspect_ratio and force_divisible_by are both
  
  used, dimensions are now rounded to the nearest allowed multiple of
  
  force_divisible_by rather than first rounding to the nearest integer and
  
  then rounding in a static direction. This results in less distortion of
  
  the aspect ratio.
  Reviewed-by : Thierry Foucu <tfoucu@google.com>
  
  Signed-off-by : Tristan Schmelcher <tschmelcher@google.com>
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavfilter/scale_eval.c
  • [DH] libavfilter/scale_eval.h