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• How to optimize FFMPEG/ Editing video ?

  6 mars 2016, par user6964

  I have the next commands for editing video but all the process take a long time. But with the same quality of the original video.

  //First cut original video
  
  exec("ffmpeg -i $video_path_main -ss $first_time1 -t $first_time2 -s 476x268 -r 10 -b 2000k -r 30 -g 100 -ar 22050 -ab 48000 -ac 1 -strict -2 $name_first");
  
  exec("ffmpeg -i $video_path_main -ss $second_time1 -t $second_time2 -s 476x268 -r 10 -b 2000k -r 30 -g 100 -ar 22050 -ab 48000 -ac 1 -strict -2 $name_second");
  
  
  
  $name_edit_second = uniqid() . '.mp4'; //Then editing the second video
  
  exec("ffmpeg -i $name_second -s 476x268 -r 10 -b 2000k -r 30 -g 100 -ar 22050 -ab 48000 -ac 1 -strict -2 -vf movie='" . $image_name . " [watermark]; [in] [watermark] overlay=308:43"."' $name_edit_second");
  
  
  
  //Then merge video file mp4 with Mencoder
  
  $name_total_1 = uniqid() . '.mp4';
  
  exec("mencoder -oac pcm -ovc xvid -vf scale -xvidencopts bitrate=460 -o $name_total_1 ".$name_first.' '.$name_edit_second);
  
  
  
  //Then convert the video to 3 formats that is necessary in my Player.
  
  $name_total = uniqid();
  
  
  
  //Of MP4 a FLV
  
  exec("ffmpeg -i $name_partial -f flv -s 476x268 -r 10 -b 2000k -r 30 -g 100 -ar 22050 -ab 48000 -ac 1 $name_total.flv");
  
  
  
  //Of MP4-Mencoder a MP4-FFMPEG
  
  exec("ffmpeg -i $name_partial -s 476x268 -r 10 -b 2000k -r 30 -g 100 -ar 22050 -ab 48000 -ac 1 -strict -2 $name_total.mp4"));
  
  
  
  //Of MP4 a WEBM
  
  exec("ffmpeg -i $name_partial -acodec libvorbis -s 476x268 -r 10 -b 2000k -r 30 -g 100 -ar 22050 -ab 48000 -ac 2 -f webm $name_total.webm");

  I don’t know if some of parameters take much time for all the process. Or if one of this command take much time.

  Note : Some videos have more than 2 parts of their original videos.

  ---

  UPDATE

  Maybe the parameter -theards 1 help me in NO take a lot of resources of the CPU. Also, I need to optimize the re-encoding because with only 8 users take the 100% of resources.

  I run FFMPEG in a other server that return the video edited to other server where stay my application.

  Sorry for my english.

• How to transcode avi or mov file to mpeg-ts with specific results ?

  15 juillet 2015, par Andy Do

  Can someone please help me convert a mov or mp4 file to mpeg-ts to look like the output below ?

  So far I have this :

  ffmpeg -i test_5.mp4 -c copy -bsf h264_mp4toannexb -b:a test_5.ts

  and want to replicate this :

  Format                                   : MPEG-TS
  
  File size                                : 1.48 GiB
  
  Duration                                 : 11mn 45s
  
  Overall bit rate mode                    : Constant
  
  Overall bit rate                         : 18.0 Mbps
  
  
  
  Video
  
  ID                                       : 481 (0x1E1)
  
  Menu ID                                  : 1 (0x1)
  
  Format                                   : MPEG Video
  
  Format version                           : Version 2
  
  Format profile                           : Main@Main
  
  Format settings, BVOP                    : Yes
  
  Format settings, Matrix                  : Custom
  
  Format settings, GOP                     : M=3, N=15
  
  Format settings, picture structure       : Frame
  
  Codec ID                                 : 2
  
  Duration                                 : 11mn 45s
  
  Bit rate                                 : 16.9 Mbps
  
  Maximum bit rate                         : 15.0 Mbps
  
  Width                                    : 720 pixels
  
  Height                                   : 480 pixels
  
  Display aspect ratio                     : 4:3
  
  Frame rate                               : 29.970 fps
  
  Standard                                 : NTSC
  
  Color space                              : YUV
  
  Chroma subsampling                       : 4:2:0
  
  Bit depth                                : 8 bits
  
  Scan type                                : Interlaced
  
  Scan order                               : Top Field First
  
  Compression mode                         : Lossy
  
  Bits/(Pixel*Frame)                       : 1.633
  
  Time code of first frame                 : 00:00:00;00
  
  Time code source                         : Group of pictures header
  
  Stream size                              : 1.39 GiB (94%)
  
  
  
  Audio
  
  ID                                       : 482 (0x1E2)
  
  Menu ID                                  : 1 (0x1)
  
  Format                                   : AC-3
  
  Format/Info                              : Audio Coding 3
  
  Mode extension                           : CM (complete main)
  
  Format settings, Endianness              : Big
  
  Codec ID                                 : 129
  
  Duration                                 : 11mn 45s
  
  Bit rate mode                            : Constant
  
  Bit rate                                 : 192 Kbps
  
  Channel(s)                               : 2 channels
  
  Channel positions                        : Front: L R
  
  Sampling rate                            : 48.0 KHz
  
  Bit depth                                : 16 bits
  
  Compression mode                         : Lossy
  
  Stream size                              : 16.2 MiB (1%)
  
  Language                                 : English

  Thanks if you can !

• Create conversion queue using ffmpeg and C #

  22 octobre 2017, par Alexei Agüero Alba

  Ok, the idea is to create a file queue that can be modified and reorganized (this is done) and for each file execute a ffmpeg process to convert it to another format.

  For conversion use Xabe.FFmpeg and .Net 4.5 all using async and await.

  The question would be how to execute an x ​​number of processes in parallel (example 4) of that variable queue and when one of them finishes executing the next one, keeping in execution always the same amount in parallel. I can start from scratch but I need ideas on how to do this in the simplest way possible. The program itself is simple (with gui) takes a folder and its subfolders all the video files and queues them and starts the conversion, you can add other folders with more files, and independent files reorder them, to convert whichever is the greater.

  At one point I found a package I think nuget (or github) that did exactly what I needed but I have not been able to get back.

  Thanks for your help in advance.

  Excuse the English because I use the translator of Google for being faster because my domain of this is limited but sufficient to understand the answers.

  ---

  Ok, I found what I was looking for called ProcessManager is a nupkg package. It has 2 years of development but seems stable. The only drawback is that it does not allow me to organize the conversion queue once you have added the files, although I have to try some ideas that maybe functions.

  var manager = new Manager(4); // Max 4 processes will be started simultaneously
  
  manager.Start();
  
  
  
  manager.ProcessErrorDataReceived += (sender, e) => Console.WriteLine(e.Data);
  
  manager.ProcessOutputDataReceived += (sender, e) => Console.WriteLine(e.Data);
  
  
  
  foreach (var videoFileName in Directory.EnumerateFiles("videos"))
  
  {
  
      var info = new ProcessInfo(
  
          "ffprobe.exe",
  
          string.Format("-v quiet -print_format json -show_format -show_streams \"{0}\"", videoFileName));
  
  
  
      manager.Queue(info);
  
  }

  Process Manager