Audio Video Merge

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ffmpeg -i video filename -i audio filename -codec copy output MP4 filename

mp4 video stitching

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ffmpeg -i 1.mp4 -vcodec copy -acodec copy -vbsf h264_mp4toannexb 1.ts ffmpeg -i 2.mp4 -vcodec copy -acodec copy -vbsf h264_mp4toannexb 2.ts ffmpeg -i "concat:1.ts|2.ts" -acodec copy -vcodec copy -absf aac_adtstoasc output.mp4

Enable Graphics Support

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ffmpge -hwaccel cuvid
##### GPU:
  .\ffmpeg-win64-v4.2.2.exe -c:v h264_cuvid -i "E:\\Downloads\\0112\\The Tai-chi Maste qq.mp4"
      -i "E:\\GitSpace\\DeWaterMark\\watermark\\watermark1.png"
      -i "E:\\GitSpace\\DeWaterMark\\watermark\\watermark2.png"
      -filter_complex "overlay=enable='lte(t,20)':x=(W-w)/2:y=H-h:,overlay=enable='gt(mod(t,31),20)':x=W-w:y=0"
      -c:v h264_nvenc -b:v 1500k -bufsize 1500k "D:\\Downloads\\output\\output.mp4" -y

##### CPU:
 .\ffmpeg-win64-v4.2.2.exe  -i "E:\\Downloads\\0112\\The Tai-chi Maste aa.mp4"
      -i "E:\\GitSpace\\DeWaterMark\\watermark\\watermark1.png"
      -i "E:\\GitSpace\\DeWaterMark\\watermark\\watermark2.png"
      -filter_complex "overlay=enable='lte(t,20)':x=(W-w)/2:y=H-h:,overlay=enable='gt(mod(t,31),20)':x=W-w:y=0"
      -b:v 1500k -bufsize 1500k "D:\\Downloads\\output\\output.mp4" -y

Add Watermark

  • Movie filters in detail

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      ffmpeg -i inputfile -vf  "movie=masklogo,scale= 60: 30[watermask]; [in] [watermask] overlay=30:10 [out]" outfile
    Parameter description:
    marklogo: the image of the watermark to be added;
    scale: the size of the watermark, the length of the watermark * the height of the watermark;
    overlay: location of the watermark, distance from the left side of the screen * distance from the top side of the screen; mainW main video width, mainH main video height, overlayW watermark width, overlayH watermark height
    　　Upper left corner overlay parameter is overlay=0:0
    　　Upper right corner is overlay= main_w-overlay_w:0
    　　Bottom right corner is overlay= main_w-overlay_w:main_h-overlay_h
    　　Bottom left is overlay=0: main_h-overlay_h
        The 0 on the face can be changed to 5, or 10 pixels to allow for more white space.

  • Timed Text Watermark

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    ffmpeg -re -i test.mp4 -vf "drawtext=fontsize=60:fontfile=lazy.ttf:text='{localtime\:%Y\-%m-%d %H-%M-%S}':fontcolor=green:box=1:boxcolor=yellow:enable=lt(mod(t\, 3)\, 1)" out.mp4

  • Add an image watermark

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    ffmpeg -i test.mp4 -vf "movie=logo.jpg[wm];[in][wm]overlay=30:10[out]" image_out.mp4

  • Add four image watermarks

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    ffmpeg -i in.mp4 -i logo.png -i logo.png -filter_complex "overlay=5:5, overlay=x=W-w:y=5" in_out_mul_watermark.mp4

  • Add two watermarks and specify the location and start time of disappearance.

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    # Add two watermarks, the first one is displayed in the lower center, showing time 0-20 seconds, and the second one is displayed in the upper right, showing time 20-31 seconds.
    ffmpeg -i intput.mp4 -i watermark1.png -i watermark2.png -filter_complex "overlay=enable='lte(t,20)':x=(W-w)/2:y=H-h:,overlay=enable='gt( mod(t,31),20)':x=W-w:y=0" output.mp4 -y
    # Same as above to add graphics card support
    ffmpeg -hwaccel cuvid -i intput.mp4 -i watermark1.png -i watermark2.png -filter_complex "overlay=enable='lte(t,20)':x=(W-w)/2:y=H-h:,overlay =enable='gt(mod(t,31),20)':x=W-w:y=0" -vcodec h264_nvenc output.mp4 -y

  • Add two watermarks that alternate for 10 seconds

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    ffmpeg -i /root/test.mp4 -i /root/videoProcessing/youtube/test.png -i /root/test.png 
      -filter_complex “overlay=x=if(lt(mod(t,20),10),10,NAN ):y=10,overlay=x=if(gt(mod(t,20),10),main_w-273,NAN ) :y=main_h-113,subtitles=/root/test.srt :force_style=‘Fontsize=14’” /root/test3.mp4
      
      Add two watermarks, overlay=x=if(lt(mod(t,20),10),10,NAN ):y=10,overlay=x=if(gt(mod(t,20),10),main_w-273,NAN ) These two use a function that represents that the watermarks are alternating.
      mod(t,20) represents that the current time is modeled against 20;
      lt(a,b) represents a<b, then true
      if(true,a,b) means if true, then return a, otherwise return b
      
      ps:If you need to do command line splicing in your program, you must remember to escape, otherwise you will report an error.

Video Splitting

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ffmpeg -v quiet -y -i S4.mp4 -vcodec copy -acodec copy -ss 00:00:00 -t 00:07:12 -sn S01E01.mp4 -ss denotes the start time of video segmentation, -t denotes the segmentation duration

rm 转mp4

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ffmpeg -i gdg.rmvb  -vcodec libx264 -c:v h264 -c:a aac gdg.mp4 
silent -an : no audio encoding -vcodec : set the encoding of the video, I'm using x264 here -b : this is the bitrate -f : force to use the format -y : auto lose y confirmation

flv to MP4

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ffmpeg -i aa！.flv  -vcodec libx264 -c:v h264 -c:a aac aa.mp4
Batch Processing Video
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for %%G in (*.rmvb) do ffmpeg -i "%%~G" -c:v h264 -c:a aac "%%~nG.mp4" for %%G in (*.rm) do ffmpeg -i "%%~G" -c:v h264 -c:a aac "%%~nG.mp4"

Other formats to MP3 scripts

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@echo off & title
cd /d %~dp0
for %%a in (*.m4a) do (
 echo Conversion in progress：%%a
 ffmpeg -i "%%~sa" -y -acodec libmp3lame -aq 0 "output\%%~na.mp3"
)
pause

MP4 Batch Convert Files

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@echo off

::Set the video or audio format to be processed below, some of the major video formats are listed here
set Ext=*.avi,*.mp4,*.wmv,*.flv,*.mkv,*.rmvb,*.rm,*.3gp,*.ts

md output

echo Start video conversion

::Set the output format at the bottom, here the output is mp4, you can change it by yourself
for %%a in (%Ext%) do (
	echo Conversion in progress：%%a
	ffmpeg -loglevel quiet -i "%%a" -f mp4 "output\%%~na.mp4" -y
)

echo Conversion complete

pause

video compression

  1. View Video Parameters
  2. ffmpeg -i 1274.mp4 -b 600k 12.mp4
-b    Data bit rate, the size of data traffic transmitted per second (kb/s), the bit rate set in this command is 600k, which is one-eighth of the original video.

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