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• On Heroku I got FFMPEG::Error (Failed encoding.Errors : encoded file is invalid. Full output : )

  8 octobre 2020, par Ruslan Valeev

  The code is :

  


  tempfile = Tempfile.open('content')
tempfile.write(content)
movie = FFMPEG::Movie.new(tempfile.path)
screenshot_temp_file = Tempfile.open('screenshot')
movie.screenshot(screenshot_temp_file.path)


  


  everything works fine locally, but when I try this on Heroku I got error at last row :

  


  irb(main):013:0> movie.screenshot(screenshot_temp_file.path)&#xA;I, [2020-10-07T15:48:27.132114 #7]  INFO -- : Running transcoding...&#xA;["/app/vendor/ffmpeg/ffmpeg", "-y", "-i", "/tmp/content20201007-7-1g1955b", "-vframes", "1", "-f", "image2", "/tmp/screenshot20201007-7-1mmts7s"]&#xA;&#xA;E, [2020-10-07T15:48:27.190572 #7] ERROR -- : Failed encoding...&#xA;["/app/vendor/ffmpeg/ffmpeg", "-y", "-i", "/tmp/content20201007-7-1g1955b", "-vframes", "1", "-f", "image2", "/tmp/screenshot20201007-7-1mmts7s"]&#xA;&#xA;&#xA;Errors: encoded file is invalid. &#xA;&#xA;Traceback (most recent call last):&#xA;        7: from /app/bin/irb:30:in `<main>&#x27;&#xA;        6: from /app/bin/irb:30:in `load&#x27;&#xA;        5: from /app/vendor/ruby-2.6.6/lib/ruby/gems/2.6.0/gems/irb-1.0.0/exe/irb:11:in `<top>&#x27;&#xA;        4: from (irb):13&#xA;        3: from /app/vendor/bundle/ruby/2.6.0/gems/streamio-ffmpeg-3.0.2/lib/ffmpeg/movie.rb:204:in `screenshot&#x27;&#xA;        2: from /app/vendor/bundle/ruby/2.6.0/gems/streamio-ffmpeg-3.0.2/lib/ffmpeg/transcoder.rb:45:in `run&#x27;&#xA;        1: from /app/vendor/bundle/ruby/2.6.0/gems/streamio-ffmpeg-3.0.2/lib/ffmpeg/transcoder.rb:112:in `validate_output_file&#x27;&#xA;FFMPEG::Error (Failed encoding.Errors: encoded file is invalid. Full output: )&#xA;</top></main>

  


  I've try to pass some options, like :seek_time and validate: false but nothing changed. What am I doing wrong ? Thank you so much !

  


  EDIT :
After Full output: ) there is nothing.
I've install FFMPEG buildpack on Heroku, and can see it in ui :

  


  

  


• audio is out of sync after concat 2 files

  1er juin 2019, par S.T

  i want to show a video, that has 2 movies side by side. each movie is a result of one movie that concat 2 times. the problem is that the audio in the right side is out of sync.

  i have 3 commands :
  first command concat one movie 2 times

  ffmpeg -i 1.mp4 -i 1.mp4 -filter_complex "[0:v:0][0:a:0][1:v:0][1:a:0]concat=n=2:v=1:a=1[concatv][concata]" -map "[concatv]" -map "[concata]" Concat1.mp4

  second command concat the second movie 2 times

  ffmpeg -i 2.mp4 -i 2.mp4 -filter_complex "[0:v:0][0:a:0][1:v:0][1:a:0]concat=n=2:v=1:a=1[concatv][concata]" -map "[concatv]" -map "[concata]" Concat2.mp4

  at this point the audio is always synced.
  the third command takes the 2 results and merge it to one movie side by side with a logo :

  ffmpeg -i Concat1.mp4 -i Concat2.mp4 -i logo.png -filter_complex "[0:v]pad=width=iw+20:height=ih+20:x=10:y=10:color=black[a];[1:v]pad=width=iw+20:height=ih+20:x=10:y=10:color=black[b];nullsrc=size=640x480[base];[a]setpts=PTS-STARTPTS, scale=320x480[left];[b]setpts=PTS-STARTPTS, scale=320x480[right];[base][left]overlay=shortest=1[tmp1];[tmp1][right] overlay=320:0[video];[0:a]apad [apa];[apa][1:a]amerge=inputs=2,pan=stereo|FLcode>

  the problem is that in the output file the audio of the right movie is out of sync in its second time (the second concat). it always the right movie that is out of sync, even when i switch them.

  can anyone help ?
  Thanks.

  ==============EDIT===================

  the problem of the sync has solved by adding apad also to the second file, but after that the command never stops... how can i tell the command to stop when both movies ended if i have apad for both movies ?
  this is the new command that never stops :

  ffmpeg -i 1.mp4 -i 2.mp4 -i logo.png -filter_complex "[0:v]pad=width=iw+20:height=ih+20:x=10:y=10:color=black[a];[1:v]pad=width=iw+20:height=ih+20:x=10:y=10:color=black[b];nullsrc=size=640x480[base];[a]scale=320x480[left];[b]scale=320x480[right];[base][left]overlay=shortest=1[tmp1];[tmp1][right] overlay=320:0[video];[1:a]apad [apa];[0:a]apad[apa1];[apa][apa1]amix=inputs=2:duration=longest[audio];[2:v]scale=120:44 [ovrl];[video][ovrl]overlay=15:25[videoandlogo]" -map "[videoandlogo]" -map "[audio]" output.mp4 

• Merging four videos with different resolution in a Grid with ffmpeg

  5 juillet 2015, par Taufiq

  I want to marge four videos in to one as show below. I have achieve the correct output given all the videos have the same resolution. But I get an undesirable result with different resolution. See below for more details.

  i need ffmpeg code to get to merge 4 videos of different resolution in a grid format

  ffmpeg.exe -i "1.avi" -vf "[in] scale=iw:ih, pad=2*iw:ih [left];movie=2.avi, scale=iw:ih [right]; [left][right] overlay=main_w/2:0 [out]" -b:v 768k "Output1.mp4"
  
  ffmpeg.exe -i "3.avi" -vf "[in] scale=iw:ih, pad=2*iw:ih [left];movie=4.avi, scale=iw:ih [right]; [left][right] overlay=main_w/2:0 [out]" -b:v 768k "Output2.mp4"
  
  ffmpeg.exe -i "Output1.mp4" -vf "pad=iw:2*ih [top]; movie=Output2.mp4 [bottom]; [top][bottom] overlay=0:main_h/2" "Output_Stacked.mp4"

  Code above gives the follow output.

  

  But the problem arises when I rotate one of the videos and merge them.
  .

  Please tell me what I need to change to get the desired result. Thanks