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• PHP exec - echo output line by line during progress

  16 décembre 2014, par Bren1818

  I’m trying to find a way in which I can echo out the output of an exec call, and then flush that to the screen while the process is running. I have written a simple PHP script which accepts a file upload and then converts the file if it is not the appropriate file type using FFMPEG. I am doing this on a windows machine. Currently my command looks like so :

  $cmd = "ffmpeg.exe -i ..\..\uploads\\".$filename." ..\..\uploads\\".$filename.".m4v 2>&1";
  
  exec( $cmd, $output);

  I need something like this :

  while( $output ) {
  
      print_r( $output);
  
      ob_flush();  flush();  
  
  }  

  I’ve read about using ob_flush() and flush() to clear the output buffer, but I only get output once the process has completed. The command works perfectly, It just doesn’t update the Page while converting. I’d like to have some output so the person knows what’s going on.

  I’ve set the time out

  set_time_limit( 10 * 60 ); //5 minute time out

  and would be very greatful if someone could put me in the right direction. I’ve looked at a number of solutions which come close one Stackoverflow, but none seem to have worked.

• Unable to find a suitable output format for 'pipe :' pipe: : Invalid argument

  22 août 2017, par Mahi

  When I run this command :

  raspivid -n -vf -hf -t 0 -w 960 -h 540 -fps 25 -b 500000 -o - |
  
  ffmpeg -i - -vcodec copy -an -metadata title="Streaming from raspberry pi camera" \
  
  -f flv $RTMP_URL/$STREAM_KEY

  it returns :

  [NULL @ 0x3414410] Unable to find a suitable output format for 'pipe:'
  
  pipe:: Invalid argument

  How should I tweak my command line ?

• ffmpeg can't find output directory under cygwin

  22 octobre 2015, par ljwobker

  I’m using the windows build of ffmpeg (details below), and when I try to transcode a video with the output file NOT in the local directory, it complains with the error message :

  /dtop/out.mp4: No such file or directory

  My cygwin mounts are as follows - I have not found any other application which doesn’t follow the mounts/links correctly...

  [lwobker:/dtop/vertigo]$ mount
  
  C:/Documents and Settings/lwobker/Desktop on /dtop type ntfs (binary)
  
  C:/cygwin/bin on /usr/bin type ntfs (binary,auto)
  
  C:/cygwin/lib on /usr/lib type ntfs (binary,auto)
  
  C:/cygwin on / type ntfs (binary,auto)
  
  C: on /cygdrive/c type ntfs (binary,posix=0,user,noumount,auto)

  Here’s what I’ve managed to figure out so far, leading me to believe that for some reason FFMPEG does not like following mount points or links in cygwin. But I’ll be damned if I can figure out why...

  if I do this, it WORKS :
  ffmpeg -i ./input.mp4 ./out.mp4

  if I do this, it WORKS (permission and mount/link check) :
  touch /dtop/out.mp4

  however, if I give a file location that is not in the current working directory or a subdirectory of the current working directory, it pukes :

  [lwobker:/dtop/vertigo]$ ffmpeg -i 00001.MTS /dtop/out.mp4
  
  ffmpeg version N-64919-ga613257 Copyright (c) 2000-2014 the FFmpeg developers
  
  <snip>
  
  Input #0, mpegts, from '00001.MTS':
  
    Duration: 00:01:41.63, start: 1.033367, bitrate: 10221 kb/s
  
    Program 1
  
      Stream #0:0[0x1011]: Video: h264 (High) (HDMV / 0x564D4448), yuv420p, 1440x1080 [SAR 4:3 DAR 16:9], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
  
      Stream #0:1[0x1100]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, fltp, 256 kb/s
  
      Stream #0:2[0x1200]: Subtitle: hdmv_pgs_subtitle ([144][0][0][0] / 0x0090), 1920x1080
  
  /dtop/out.mp4: No such file or directory
  
  </snip>

  it also pukes if I give it /cygdrive/c/somefile.mp4 as an argument - it won’t find that either.

  Any ideas would be really appreciated. I had this working with a version of FFMPEG that I had compiled from source locally within cygwin, but when I moved machines I could not get it to recompile correctly so I’m hoping to figure this out so I can use the pre-compiled binaries for convenience...

  FFMPEG version details :

  [lwobker:/dtop/vertigo]$ ffmpeg
  
  ffmpeg version N-64919-ga613257 Copyright (c) 2000-2014 the FFmpeg developers
  
    built on Jul 23 2014 00:35:22 with gcc 4.8.3 (GCC)
  
    configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-decklink --enable-zlib
  
    libavutil      52. 92.101 / 52. 92.101
  
    libavcodec     55. 69.100 / 55. 69.100
  
    libavformat    55. 48.101 / 55. 48.101
  
    libavdevice    55. 13.102 / 55. 13.102
  
    libavfilter     4. 11.102 /  4. 11.102
  
    libswscale      2.  6.100 /  2.  6.100
  
    libswresample   0. 19.100 /  0. 19.100
  
    libpostproc    52.  3.100 / 52.  3.100
  
  Hyper fast Audio and Video encoder
  
  usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...
  
  
  
  Use -h to get full help or, even better, run 'man ffmpeg'