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• Concat 2 videos preserving audio timestamp and add overlay (watermark) in single ffmpeg command

  21 mars 2017, par Cris

  I need to perform multiple actions with ffmpeg, problem is that it seem that for add a watermark and concatenate videos I need to re-encode the video. In three steps it would take ages. So I would like to do everything I need with only one video encoding.

  I have a Video #1, it has audio. Also I have a Video #2, with audio too. I would like to concat the #1 and #2 (or play #1 first, and then #2) and then add a watermark in #2 for the rest of the video, preserving audio timestamps.

  I have searched a lot o internet, so far I got this :

  ffmpeg -i Video1.mp4 -itsoffset 4 -i Video2.mp4 -i watermark.png -filter_complex "overlay=5:5" -codec:v libx264 -crf 21 -bf 2 -flags +cgop -pix_fmt yuv420p -codec:a aac -strict -2 -b:a 384k -r:a 48000 -movflags faststart Out.mp4

  The sound from Video #2 disappeared and there’s no watermark.

  I’m not well-versed in ffmpeg, nor in audio & video terminology, so I apologize for possible horrible misconceptions.

  Thanks in advance.

• ffmpeg & watermark issue on convert movie

  27 mars 2017, par Sebastian Schweinste

  after update of WinFF i get error :

  "C:\Program Files (x86)\WinFF\ffmpeg.exe" -t 0:00:25 -y -i "c:\Videos\temp\input.mpg" -f mp4  -r 14 -vcodec libx264 -coder 1 -flags +loop+cgop -cmp +chroma -partitions +parti8x8+parti4x4+partp8x8+partb8x8 -me_method hex -subq 7 -me_range 16 -g 250 -keyint_min 25 -sc_threshold 40 -i_qfactor 0.71 -b_strategy 1 -qcomp 0.6 -qmin 0 -qmax 69 -qdiff 4 -bf 3 -refs 3 -direct-pred 1 -trellis 1 -wpredp 2 -vf scale=240:180 -aspect 4:3 -maxrate 800k -bufsize 80k -b:v 400k -ar 44100 -b:a 80k -ac 2 -b 650k  -vf "movie="c:\Videos\watermarklogo.png" [watermark]; [in][watermark] overlay=main_w-overlay_w-10:main_h-overlay_h-10 [out]" "c:\Videos\new\output.mpg"

  error :
  Filtergraph ’scale=240:180’ was specified through the -vf/-af/-filter option for output stream 0:0, which is fed from a complex filtergraph.
   vf/-af/-filter and -filter_complex cannot be used together for the same stream.

  i downt know how to fix

• Is there a more efficient way to watermark and join videos in bulk through ffmpeg ?

  28 mars 2017, par Neo Herakles

  I have this batch file using ffmpeg to add a logo to my videos and then add an intro but it’s taking anywhere from 10 hours to a day depending on how many I have to watermark, is there a more efficient way to achieve this ? The videos sometimes have different resolutions so I can’t remove the conversion to the 1280*720 size.

  for %%I in ("C:\Users\Administrator\Desktop\work\*.mp4") do ffmpeg.exe -y -i "%%I" -i white.png -filter_complex "[0:v]scale=iw:ih[v0];[1:v][v0]scale2ref=iw/6:ih/18[logo][0v];[0v][logo]overlay=W-w-3:H-h-1[v]" -map "[v]" -map 0:a -codec:v libx264 -preset ultrafast -crf 23 -codec:a copy "C:\Users\Administrator\Desktop\Complete-videos\%%~nI.mp4"
  
  
  
  for %%I in ("C:\Users\Administrator\Desktop\work\*.mp4") do ffmpeg -y -i %%I -c copy -vbsf h264_mp4toannexb -f mpegts -s 1280*720 %%I.ts && ffmpeg -y -i "concat:out1.ts|%%I.ts|out1.ts" -c:v libx264 -strict experimental -bsf:a aac_adtstoasc -ar 48000 -r 20 "C:\Users\Administrator\Desktop\Complete-videos\%%~nI.mp4"
  
  pause