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• Shell script works fine from shell but doesn’t work as expected when executed via PHP “shell_exec” code

  9 décembre 2019, par Eric Feillant

  This record.sh script shell is here and works fine on command line to record an MP4 file from a local flv live stream :

  DATE=`date +"%d-%m-%Y-%T"`
  
  if [ -s NAMESTREAM ]
  
  then
  
  cat config.php | dos2unix | grep auth | grep username | \
  
  awk -F ' ' '{print $3}' | sed "s/'//g" | sed "s/;//g" | while read VAR
  
  do echo $VAR > RECSTREAM
  
  echo "Starting recording ..."
  
  ffmpeg -i "rtmp://localhost/hls/$VAR" -crf 19 videos/"$VAR"_"$DATE".mp4
  
  done
  
  else
  
  echo "Streaming is not started, please start it before"
  
  fi

  I send a shell_exec to call the last shell script in a php script like this :

  $old_path = getcwd();
  
  chdir('/usr/local/nginx/html/mydir');
  
  $output = shell_exec('nohup ./record.sh >/dev/null 2>/dev/null &');
  
  chdir($old_path);

  The MP4 video files are generated but unreadable with VLC, etc… It seems that the problem is due to my PHP script but I am not able to know why.

  When executing from the shell command line : PHP myphpscript.php works fine, MP4 video files are OK. But from the PHP web page, the MP4 video files are corrupted.

  Any ideas ? Any param to test in FFmpeg to have a good mp4 video file ?

• How do I write a batch file that opens a msys shell and then run commands in the shell ?

  19 septembre 2024, par cxu

  I'm trying to automate the process of building ffmpeg on Windows 10. I'm following the guide here : https://trac.ffmpeg.org/wiki/CompilationGuide/MSVC

  



  Everything works fine when I do it manually, however I want to write a batch file that I can run to go through the entire process automatically.

  



  Building requires me to set up the Visual Studio environment and the MSYS environment. This is where I'm having trouble, since running the MSYS environment opens up a new shell. I want to pass the configure/make/make install commands to the MSYS shell after it is opened.

  



  I've tried the solution here : How to open a new shell in cmd,then run script in a new shell ?

  



  The problem they had looks similar to mine, but the solutions posted there didn't work for me.

  



  Here is the bat file currently :

  



  call "C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\bin\amd64\vcvars64.bat"
call "C:\workspace\windows\mingw-get\msys\1.0\msys.bat" start cmd.exe /k bscript
pause


  



  and bscript :

  



  ./configure --enable-shared --toolchain=msvc --arch=amd64
make
make install


  



  I've tried all sorts of variations like :

  



  call "C:\workspace\windows\mingw-get\msys\1.0\msys.bat" /k bscript
call "C:\workspace\windows\mingw-get\msys\1.0\msys.bat" bscript
start "C:\workspace\windows\mingw-get\msys\1.0\msys.bat" /k bscript
start "C:\workspace\windows\mingw-get\msys\1.0\msys.bat" bscript


  



  And I've also tried leaving the bscript code in the original batch file.

  



  The configure/make commands will either run in the original cmd window, a new cmd window or wont run at all.

  



  Is there a way to pass commands to the MSYS shell like that ?

  


• Android MediaMetadataRetriever.METADATA_KEY_DATE gives only date of video on galaxy S7

  3 octobre 2016, par Zaid Bin Tariq

  I am writing a code to get video creation date and time from metadata, i am using following code to get creation date

  MediaMetadataRetriever retriever = new MediaMetadataRetriever();
  
  retriever.setDataSource(path_to_video);
  
  String date = retriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DATE);

  it works perfect on all devices except Samsung Galaxy S7, it returns only date in "YYYY MM DD" format, no time stamp i need both date and timestamp.

  any help in this regard is much appreciated.