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• FFmpeg remove background of video with no black outline

  26 février 2024, par Duc Pham The

  Im using this ffmpeg command to overlay a video on video(with remove black background)

  


  ffmpeg -i /home/ducpt/bunny.mp4 -i overlay_video.mp4 -filter_complex "[1:v]colorkey=0x000000:0.1:0.1[ckout];[0:v][ckout]overlay=enable='between(t,0, 4)':format=rgb[out]" -map '[out]' output.mp4


  


  I used filter_complex "colorkey 0x000000:0.1:0.1" to remove background of overlay video but result have a black outline.

  


  This is screenshot of video overlay original


  


  And this is result

  


  

  


  I tried to use unpremultiply=inplace=1 to remove black outline but not working

  


  ffmpeg -i /home/ducpt/bunny.mp4 -i overlay_video.mp4 -filter_complex "[1:v]colorkey=0x000000:0.1:0.1[ckout];[ckout]unpremultiply=inplace=1 [ckout2];[0:v][ckout2]overlay=enable='between(t,0, 4)':format=rgb[out]" -map '[out]' output.mp4


  


  Please help me remove black outline :(

  


  Sorry for my bad English !

  


• 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 !