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• How to access a C pointer array from Golang

  24 avril 2018, par nevernew

  I’m writing an app for the windows platform using FFmpeg and it’s golang wrapper goav, but I’m having trouble understanding how to use the C pointers to gain access to an array.

  I’m trying to get the streams stored in the AVFormatContext class to use in go, and eventually add frames to a texture in OpenGl to make a video player with cool transitions.

  I think understanding how to cast and access the C data will make coding this a lot easier.

  I’ve stripped out all the relevant parts of the C code, the wrapper and my code, shown below :

  C code - libavformat/avformat.h

  typedef struct AVFormatContext { 
  
      unsigned int nb_streams; 
  
      AVStream **streams; 
  
  }

  Golang goav wrapper

  package avutil
  
  
  
  //#cgo pkg-config: libavformat
  
  //#include <libavformat></libavformat>avformat.h>
  
  import "C"
  
  import (
  
      "unsafe"
  
  )
  
  
  
  type Context C.struct_AVFormatContext; 
  
  
  
  func (ctxt *Context) StreamsGet(i uintptr) *Stream {
  
      streams := (**Stream)(unsafe.Pointer(ctxt.streams));
  
      // I think this is where it's going wrong, I'm brand new to this stuff 
  
      return (*Stream)(unsafe.Pointer(uintptr(unsafe.Pointer(streams)) + i*unsafe.Sizeof(*streams)));
  
  }

  My Golang code

  package main
  
  
  
  import "github.com/giorgisio/goav/avformat"
  
  
  
  func main() {
  
      ctx := &avformat.Context{} // the actual function to initiate this does an mallocz for the streams
  
  
  
      stream := ctx.StreamsGet(0)
  
  
  
      //do stuff with stream...
  
  }

  In C it looks like I just have to do just streams[i], but that wont work in go, so I added a function to the wrapper using the technique from my question here.
  However I’m not getting the data ; It looks like I’m getting a pointer to somewhere random in memory. So, how can I access these elements form golang ? Any resources would be helpful too ; I’m going to be investing a fair bit of time into this.

• Video conversion (using ffmpeg) fails only on server

  22 avril 2022, par wb.waldemar

  I'm trying to convert a video using latest static build of ffmpeg and following command :

  


  ffmpeg -report -y -loglevel info -i en--story-video.mp4 -c:v libx264 -preset slow -crf 22 -c:a copy en--story-video-out.mp4


  


  This works actually fine on Ubuntu (desktop) and the same command works also on Win 10 but not on the server (Debian GNU/Linux 10) where it should actually work. I can't install or build ffmpeg directly so I've to use a static build. Also simple remux works on the server but not the converion and I do not understand why. I've also read and tried different approaches and suggestions, but none of them could solve the problem.

  


  Does someone have an idea what goes wrong ?

  


  ffmpeg started on 2022-04-22 at 13:02:44
Report written to "ffmpeg-20220422-130244.log"
Log level: 48
Command line:
/dev/tools/ffmpeg -report -y -loglevel info -i en--story-video.mp4 -c:v libx264 -preset slow -crf 22 -c:a copy en--story-video-out.mp4
ffmpeg version N-60837-ge81242bb13-static https://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2022 the FFmpeg developers
  built with gcc 8 (Debian 8.3.0-6)
  configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gmp --enable-libgme --enable-gray --enable-libfribidi --enable-libass --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg
  libavutil      57. 22.100 / 57. 22.100
  libavcodec     59. 21.103 / 59. 21.103
  libavformat    59. 17.102 / 59. 17.102
  libavdevice    59.  5.100 / 59.  5.100
  libavfilter     8. 27.100 /  8. 27.100
  libswscale      6.  5.100 /  6.  5.100
  libswresample   4.  4.100 /  4.  4.100
  libpostproc    56.  4.100 / 56.  4.100
Splitting the commandline.
Reading option '-report' ... matched as option 'report' (generate a report) with argument '1'.
Reading option '-y' ... matched as option 'y' (overwrite output files) with argument '1'.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'info'.
Reading option '-i' ... matched as input url with argument 'en--story-video.mp4'.
Reading option '-c:v' ... matched as option 'c' (codec name) with argument 'libx264'.
Reading option '-preset' ... matched as AVOption 'preset' with argument 'slow'.
Reading option '-crf' ... matched as AVOption 'crf' with argument '22'.
Reading option '-c:a' ... matched as option 'c' (codec name) with argument 'copy'.
Reading option 'en--story-video-out.mp4' ... matched as output url.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option report (generate a report) with argument 1.
Applying option y (overwrite output files) with argument 1.
Applying option loglevel (set logging level) with argument info.
Successfully parsed a group of options.
Parsing a group of options: input url en--story-video.mp4.
Successfully parsed a group of options.
Opening an input file: en--story-video.mp4.
[NULL @ 0xb9b3b80] Opening 'en--story-video.mp4' for reading
[file @ 0xb9b41c0] Setting default whitelist 'file,crypto,data'
[mov,mp4,m4a,3gp,3g2,mj2 @ 0xb9b3b80] Format mov,mp4,m4a,3gp,3g2,mj2 probed with size=2048 and score=100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0xb9b3b80] ISO: File Type Major Brand: isom
[mov,mp4,m4a,3gp,3g2,mj2 @ 0xb9b3b80] Unknown dref type 0x206c7275 size 12
[mov,mp4,m4a,3gp,3g2,mj2 @ 0xb9b3b80] Processing st: 0, edit list 0 - media time: 512, duration: 522240
[mov,mp4,m4a,3gp,3g2,mj2 @ 0xb9b3b80] Offset DTS by 512 to make first pts zero.
[mov,mp4,m4a,3gp,3g2,mj2 @ 0xb9b3b80] Setting codecpar->delay to 2 for stream st: 0
[mov,mp4,m4a,3gp,3g2,mj2 @ 0xb9b3b80] Unknown dref type 0x206c7275 size 12
[mov,mp4,m4a,3gp,3g2,mj2 @ 0xb9b3b80] Processing st: 1, edit list 0 - media time: 0, duration: 1502222
[mov,mp4,m4a,3gp,3g2,mj2 @ 0xb9b3b80] Before avformat_find_stream_info() pos: 15666151 bytes read:88959 seeks:1 nb_streams:2
[h264 @ 0xb9b6380] nal_unit_type: 7(SPS), nal_ref_idc: 3
[h264 @ 0xb9b6380] nal_unit_type: 8(PPS), nal_ref_idc: 3
[h264 @ 0xb9b6380] nal_unit_type: 7(SPS), nal_ref_idc: 3
[h264 @ 0xb9b6380] nal_unit_type: 8(PPS), nal_ref_idc: 3
[h264 @ 0xb9b6380] nal_unit_type: 6(SEI), nal_ref_idc: 0
[h264 @ 0xb9b6380] nal_unit_type: 5(IDR), nal_ref_idc: 3
[h264 @ 0xb9b6380] Format yuv420p chosen by get_format().
[h264 @ 0xb9b6380] Reinit context to 1920x1088, pix_fmt: yuv420p
[h264 @ 0xb9b6380] no picture 
[mov,mp4,m4a,3gp,3g2,mj2 @ 0xb9b3b80] All info found
[mov,mp4,m4a,3gp,3g2,mj2 @ 0xb9b3b80] After avformat_find_stream_info() pos: 43534 bytes read:155045 seeks:2 frames:4
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'en--story-video.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf59.17.102
  Duration: 00:00:34.06, start: 0.000000, bitrate: 3679 kb/s
  Stream #0:0[0x1](und), 3, 1/15360: Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 3544 kb/s, 60 fps, 60 tbr, 15360 tbn (default)
    Metadata:
      handler_name    : ISO Media file produced by Google Inc. Created on: 04/10/2019.
      vendor_id       : [0][0][0][0]
  Stream #0:1[0x2](eng), 1, 1/44100: Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      handler_name    : ISO Media file produced by Google Inc. Created on: 04/10/2019.
      vendor_id       : [0][0][0][0]
Successfully opened the file.
Parsing a group of options: output url en--story-video-out.mp4.
Applying option c:v (codec name) with argument libx264.
Applying option c:a (codec name) with argument copy.
Successfully parsed a group of options.
Opening an output file: en--story-video-out.mp4.
[file @ 0xb9fbec0] Setting default whitelist 'file,crypto,data'
Successfully opened the file.
detected 20 logical cores
[h264 @ 0xba04680] nal_unit_type: 7(SPS), nal_ref_idc: 3
[h264 @ 0xba04680] nal_unit_type: 8(PPS), nal_ref_idc: 3
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
[h264 @ 0xba04680] nal_unit_type: 6(SEI), nal_ref_idc: 0
[h264 @ 0xba04680] nal_unit_type: 5(IDR), nal_ref_idc: 3
[h264 @ 0xba04680] Format yuv420p chosen by get_format().
[h264 @ 0xba04680] Reinit context to 1920x1088, pix_fmt: yuv420p
[h264 @ 0xba04680] no picture 
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
[h264 @ 0xbaa3b80] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 2
[h264 @ 0xbaa3b80] no picture 
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
[h264 @ 0xba067c0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 2
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
[h264 @ 0xba9c2c0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 2
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
[h264 @ 0xba21fc0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 2
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
[h264 @ 0xbab8e80] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 2
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
[h264 @ 0xbac7b00] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 2
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
[h264 @ 0xbad6840] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 2
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
[h264 @ 0xbae5580] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 2
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
[h264 @ 0xbaf42c0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 2
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
[h264 @ 0xbb03000] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 0
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
[h264 @ 0xbb11d40] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 2
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
[h264 @ 0xbb20a80] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 2
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
[h264 @ 0xbb2f7c0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 0
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
[h264 @ 0xbb3e500] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 0
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
[h264 @ 0xbb4d240] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 2
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
[h264 @ 0xba04680] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 0
[h264 @ 0xbaa3b80] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 2
[graph 0 input from stream 0:0 @ 0xba9f800] Setting 'video_size' to value '1920x1080'
[graph 0 input from stream 0:0 @ 0xba9f800] Setting 'pix_fmt' to value '0'
[graph 0 input from stream 0:0 @ 0xba9f800] Setting 'time_base' to value '1/15360'
[graph 0 input from stream 0:0 @ 0xba9f800] Setting 'pixel_aspect' to value '1/1'
[graph 0 input from stream 0:0 @ 0xba9f800] Setting 'frame_rate' to value '60/1'
[graph 0 input from stream 0:0 @ 0xba9f800] w:1920 h:1080 pixfmt:yuv420p tb:1/15360 fr:60/1 sar:1/1
[format @ 0xbaa0540] Setting 'pix_fmts' to value 'yuv420p|yuvj420p|yuv422p|yuvj422p|yuv444p|yuvj444p|nv12|nv16|nv21|yuv420p10le|yuv422p10le|yuv444p10le|nv20le|gray|gray10le'
[AVFilterGraph @ 0xba16380] query_formats: 4 queried, 3 merged, 0 already done, 0 delayed
[libx264 @ 0xba03c80] using mv_range_thread = 24
[libx264 @ 0xba03c80] using SAR=1/1
[libx264 @ 0xba03c80] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
Error initializing output stream 0:0 -- Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
[AVIOContext @ 0xb9fba00] Statistics: 0 bytes written, 0 seeks, 0 writeouts
[AVIOContext @ 0xb9b4480] Statistics: 220581 bytes read, 2 seeks
Conversion failed!


  


• How to Show result after uploaded file in PHP

  23 avril 2022, par i0x4r

  I have a script that uploads the video to a server, everything is correct but there is a problem, after the upload of the video to the server is completed
it shows all the uploaded files in the (uploads) folder as array !

  


  I only want the result of the file I just uploaded, and it doesn't show me the previous files !
I need ffmpeg to improve video quality

  


  index.php

  


  &lt;?php&#xA;//index.php&#xA;&#xA;?>&#xA;&#xA;&#xA; &#xA;  &#xA;  &#xA;  <code class="echappe-js">&lt;script src=&quot;https://ajax.googleapis.com/ajax/libs/jquery/2.2.0/jquery.min.js&quot;&gt;&lt;/script&gt;&#xA;        &lt;script src=&quot;https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js&quot;&gt;&lt;/script&gt;        &#xA;  &#xA;  &lt;script src=&quot;https://cdnjs.cloudflare.com/ajax/libs/dropzone/5.5.1/dropzone.js&quot;&gt;&lt;/script&gt;&#xA;  &#xA; &#xA; &#xA;  
  &#xA;&#xA;   
  &#xA;&#xA;   
  &#xA;   &#xA;    &#xA;   &#xA;   
  &#xA;&#xA;
  
  &#xA;&#xA;   
  &#xA;
  
  &#xA; &#xA;&#xA;&#xA;&lt;script&gt;&amp;#xA;&amp;#xA;$(document).ready(function(){&amp;#xA; &amp;#xA; Dropzone.options.dropzoneFrom = {&amp;#xA;  autoProcessQueue: true,&amp;#xA;  timeout: 300000,&amp;#xA;  acceptedFiles:&quot;video/*&quot;,&amp;#xA;  init: function(){&amp;#xA;   var submitButton = document.querySelector(&amp;#x27;#submit-all&amp;#x27;);&amp;#xA;   myDropzone = this;&amp;#xA;   submitButton.addEventListener(&quot;click&quot;, function(){&amp;#xA;    myDropzone.processQueue();&amp;#xA;   });&amp;#xA;   this.on(&quot;complete&quot;, function(){&amp;#xA;    if(this.getQueuedFiles().length == 0 &amp;amp;&amp;amp; this.getUploadingFiles().length == 0)&amp;#xA;    {&amp;#xA;     var _this = this;&amp;#xA;     _this.removeAllFiles();&amp;#xA;    }&amp;#xA;    list_image();&amp;#xA;   });&amp;#xA;  },&amp;#xA; };&amp;#xA;&amp;#xA; list_image();&amp;#xA;&amp;#xA; function list_image()&amp;#xA; {&amp;#xA;  $.ajax({&amp;#xA;   url:&quot;upload.php&quot;,&amp;#xA;   success:function(data){&amp;#xA;    $(&quot;#preview&quot;).html(data);&amp;#xA;   }&amp;#xA;  });&amp;#xA; }&amp;#xA;&amp;#xA; $(document).on(&amp;#x27;click&amp;#x27;, &amp;#x27;.remove_image&amp;#x27;, function(){&amp;#xA;  var name = $(this).attr(&amp;#x27;id&amp;#x27;);&amp;#xA;  $.ajax({&amp;#xA;   url:&quot;upload.php&quot;,&amp;#xA;   method:&quot;POST&quot;,&amp;#xA;   data:{name:name},&amp;#xA;   success:function(data)&amp;#xA;   {&amp;#xA;    list_image();&amp;#xA;   }&amp;#xA;  })&amp;#xA; });&amp;#xA; &amp;#xA;});&amp;#xA;&lt;/script&gt;&#xA;
  

  


  upload.php

  


      &lt;?php&#xA;&#xA;//upload.php&#xA;&#xA;$folder_name = &#x27;upload/&#x27;;&#xA;$tumb_name = &#x27;thumb/&#x27;;&#xA;$imageext = &#x27;.png&#x27;;&#xA;&#xA;if(!empty($_FILES))&#xA;{&#xA;&#xA; $temp_file = $_FILES[&#x27;file&#x27;][&#x27;tmp_name&#x27;];&#xA; $location = $folder_name . $_FILES[&#x27;file&#x27;][&#x27;name&#x27;];&#xA; move_uploaded_file($temp_file, $location);&#xA; $upload = $_FILES[&#x27;file&#x27;][&#x27;name&#x27;];&#xA; $uploadStr = str_replace(" ", "\ ",$upload);&#xA; $locationStr = str_replace(" ","\ ",$location);&#xA; $cmd  = "ffmpeg -y -i {$locationStr} -ss 00:00:15 -vframes 1 thumb/{$uploadStr}.png 2>&amp;1";&#xA; echo shell_exec($cmd);&#xA;}&#xA;&#xA;if(isset($_POST["name"]))&#xA;{&#xA; $filename = $folder_name.$_POST["name"];&#xA; $imagename = $thumb_name.$_POST["name"].$imageext;&#xA; unlink($filename);&#xA; unlink($imagename);&#xA;}&#xA;&#xA;$result = array();&#xA;&#xA;$files = scandir(&#x27;upload&#x27;);&#xA;&#xA;$output = &#x27;<div class="row">&#x27;;&#xA;&#xA;if(false !== $files)&#xA;{&#xA; foreach($files as $file)&#xA; {&#xA;  if(&#x27;.&#x27; !=  $file &amp;&amp; &#x27;..&#x27; != $file)&#xA;  {&#xA;   $output .= &#x27;&#xA;   <a href="http://stackoverflow.com/view.php?file=&#38;#x27;.$file.&#38;#x27;" target="_blank"> <img src="http://stackoverflow.com/feeds/tag/thumb/&#38;#x27;.$file.&#38;#x27;.png" class="img-thumbnail" width='246' height='138' /></a>&#xA;    <button type="button" class="btn btn-link remove_image">Remove</button>&#xA;   &#x27;;&#xA;  }&#xA; }&#xA;}&#xA;$output .= &#x27;</div>&#x27;;&#xA;echo $output;&#xA;&#xA;?>&#xA;

  


  EDIT :
I put the example on an Array, I don't want it, I just want it to show the downloaded video I just uploaded as a result.

  


  EDIT 2 :
There are some who say type $location and it displays the downloaded file, but this does not work !!!
I just tried more than once and with several uses, there is no display where the text is empty

  


  This is an example of that

  


  <?php

//upload.php

$folder_name = 'upload/';
$tumb_name = 'thumb/';
$imageext = '.png';

if(!empty($_FILES))
{

 $temp_file = $_FILES['file']['tmp_name'];
 $location = $folder_name . $_FILES['file']['name'];
 move_uploaded_file($temp_file, $location);
 $upload = $_FILES['file']['name'];
 $uploadStr = str_replace(" ", "\ ",$upload);
 $locationStr = str_replace(" ","\ ",$location);
 $cmd  = "ffmpeg -y -i {$locationStr} -ss 00:00:15 -vframes 1 thumb/{$uploadStr}.png 2>&1";
 echo shell_exec($cmd);
}

if(isset($_POST["name"]))
{
 $filename = $folder_name.$_POST["name"];
 $imagename = $thumb_name.$_POST["name"].$imageext;
 unlink($filename);
 unlink($imagename);
}


$output .= 'Successfly file is "'.$location.'"';
echo $output;

?>


  


  Result : Successfly file is ""
no name file :(

  


  EDIT 3 :

  


  this code upload.php
functions not working

  


  &lt;?php&#xA;&#xA;//upload.php&#xA;&#xA;$folder_name = &#x27;upload/&#x27;;&#xA;$tumb_name = &#x27;thumb/&#x27;;&#xA;$imageext = &#x27;.png&#x27;;&#xA;&#xA;if(!empty($_FILES))&#xA;{&#xA;&#xA; $temp_file = $_FILES[&#x27;file&#x27;][&#x27;tmp_name&#x27;];&#xA; $location = $folder_name . $_FILES[&#x27;file&#x27;][&#x27;name&#x27;];&#xA; move_uploaded_file($temp_file, $location);&#xA; $upload = $_FILES[&#x27;file&#x27;][&#x27;name&#x27;];&#xA; $uploadStr = str_replace(" ", "\ ",$upload);&#xA; $locationStr = str_replace(" ","\ ",$location);&#xA; $cmd  = "ffmpeg -y -i {$locationStr} -ss 00:00:15 -vframes 1 thumb/{$uploadStr}.png 2>&amp;1";&#xA; echo shell_exec($cmd);&#xA;}&#xA;&#xA;&#xA;echo "The file " . $location . " has been uploaded";&#xA;// not working&#xA;echo "<br />";&#xA;echo "The file " . $upload . " has been uploaded";&#xA;// not working&#xA;echo "<br />";&#xA;echo "The file " . $uploadStr . " has been uploaded";&#xA;// not working&#xA;echo "<br />";&#xA;echo "The file " . $locationStr . " has been uploaded";&#xA;// not working&#xA;&#xA;?>&#xA;

  


  

  


  this error :
[23-Apr-2022 12:31:56 Asia/Riyadh] PHP Notice : Undefined variable : location in /home/prdix/public_html/test/upload.php on line 38

  


  line 38 : echo $location ;

  


  About the developer solution Markus AO

  


  I did the experiment and it is quite good, but dropzone is still missing, because I will upload a large video and the normal upload compresses the video before uploading, here is a picture from my mobile while uploading, but this does not happen with dropzone


  


  I want to implement this in dropzone as well, because this library does not compress the video, but upload it in full size.

  


  Thank you bro.