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• How to fix call lib ffmpeg by c#

  20 février 2017, par Thang Tran

  string _a= -i "D:_InputFolder\Jamaican man talking the truth about #zika virus.mp4" -filter_complex "[0:a]atempo=0.9,volume=1.6,asetrate=r=44100*33.6/30,atempo=30/33.6,highpass=f=400,lowpass=f=4100,earwax,biquad,compensationdelay,equalizer=f=222:width_type=o:width=2:g=5,equalizer=f=444:width_type=h:width=220:g=5 ; setpts=PTS/0.9" -vcodec libx264 -pix_fmt yuv420p -r 30 -g 60 -b:v 1400k -profile:v main -level 3.1 -acodec libmp3lame -b:a 128k -ar 44100 -metadata title="" -metadata artist="" -metadata album_artist="" -metadata album="" -metadata date="" -metadata track="" -metadata genre="" -metadata publisher="" -metadata encoded_by="" -metadata copyright="" -metadata composer="" -metadata performer="" -metadata TIT1="" -metadata TIT3="" -metadata disc="" -metadata TKEY="" -metadata TBPM="" -metadata language="eng" -metadata encoder="" -threads 0 -preset superfast "D:_OutputFolder\videoOutput.mp4"

  -----------this is the code goi goi sua sound in c # error

  string _b= -i "D:_InputFolder\Jamaican man talking the truth about #zika virus.mp4" -acodec pcm_u8 -ar 22050 "D:_OutputFolder\videoOutput.wav"
  — with code editing video style is back.

  file class run ffmpeg
  call c# :
  string _result = ffmpeg.RunCommand(_b) ;//wordless

  string _result2 = ffmpeg.RunCommand(_a) ;//error

  file class call ffmpeg :

  -file project demo error :
  https://drive.google.com/open?id=0B9dxSeLrFswjVmNGd1IzcUpncE0

  thank you and sorry if my english is the poor

• 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.