Some practical applications of ffmpeg – Blogs- Outsource-online Internet Solutions

Creating a blank video

ffmpeg -f lavfi -i color=c=black:s=1366x768:r=25/1 -f lavfi -i anullsrc=cl=mono:r=48000 -c:v h264 -c:a pcm_s16be -t 3 out.mov -y

-c:v copy video
-c:a copy audio

for mp4 remove '-c:a pcm_s16be'

Because of Error Could not find tag for codec pcm_s16be

ffmpeg -f lavfi -i color=c=black:s=1366x768:r=25/1 -f lavfi -i anullsrc=cl=mono:r=48000 -c:v h264  -t 3 out.mp4 -y

-f lavfi means format in libavformat

otherwise error:

[mp3 @ 00000241ac434180] Invalid audio stream. Exactly one MP3 audio stream is required.
Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
Error initializing output stream 0:0 --

overlap small image on center of blank video

@echo off
rem ffmpeg -i out.mp3 -i allportPersonality.jpeg -filter_complex "overlay=20:20" output.mp4
rem *Error:* Cannot find a matching stream for unlabeled input pad 1 on filter Parsed_overlay_0
rem reason first file was mp3
ffmpeg -i out.mp4 -i allportPersonality.jpeg -filter_complex "overlay=20:20" output.mp4 -y
rem map in center (main_w-overlay_w)/2:(main_h-overlay_h)/2
ffmpeg -i out.mp4 -i allportPersonality.jpeg -filter_complex "overlay=(main_w-overlay_w)/2:(main_h-overlay_h)/2" output.mp4 -y

Overlap big image into small Canvas

rem traitTheory.jpeg canvas size 1366x768, image size 841x1024, so scale to fit in BG
soure

rem Here is a generic filter expression for scaling (maintaining aspect ratio) and padding any source size to any target size:
rem scale=min(iw*TARGET_HEIGHT/ih\,TARGET_WIDTH):min(TARGET_HEIGHT\,ih*TARGET_WIDTH/iw),pad=TARGET_WIDTH:TARGET_HEIGHT:(TARGET_WIDTH-iw)/2:(TARGET_HEIGHT-ih)/2
rem scale=iw*min(1366/iw\,768/ih):ih*min(1366/iw\,768/ih)
ffmpeg -i out.mp4 -i traitTheory.jpeg -filter_complex "overlay=0:0" output.mp4 -y
rem overlay in center
ffmpeg -i out.mp4 -i traitTheory.jpeg -filter_complex "[1:v]scale=iw*min(1366/iw\,768/ih):ih*min(1366/iw\,768/ih)[ovrl],[0:v][ovrl]overlay=(main_w-overlay_w)/2:(main_h-overlay_h)/2" output2.mp4 -y

Create blank image and overlay in one go

ffmpeg -f lavfi -i color=size=1366x768:duration=3:rate=25:color=blue -i allportPersonality.jpeg -filter_complex ^
"[0:v][1:v]overlay=(main_w-overlay_w)/2:(main_h-overlay_h)/2" output.mp4 -y

Concat 2 files

ffmpeg -y -i "output.mp4" -i "output2.mp4"  -filter_complex "[0:v][1:v]concat=n=2:v=1 [outv]" -map "[outv]" -y concat.mp4

Create blank image and overlay for 2 images and concat in one go

ffmpeg -f lavfi -i color=size=1366x768:duration=3:rate=25:color=blue -i allportPersonality.jpeg -f lavfi -i color=size=1366x768:duration=3:rate=25:color=black -i traitTheory.jpeg -filter_complex "[0:v][1:v]overlay=(main_w-overlay_w)/2:(main_h-overlay_h)/2[v0]; [3:v]scale=iw*min(1366/iw\,768/ih):ih*min(1366/iw\,768/ih)[ovrl],[2:v][ovrl]overlay=(main_w-overlay_w)/2:(main_h-overlay_h)/2[v1];[v0][v1]concat=n=2:v=1[outv]"  -map "[outv]" -y concatSingle.mp4

spliting commands for windows bat

echo one ^
two ^
three ^
four ^
five ^
*

Splitting ffmpeg concat command into multiple lines

ffmpeg -f lavfi -i color=size=1366x768:duration=0.1:rate=25:color=FF00FF -i allportPersonality.jpeg ^
-f lavfi -i color=size=1366x768:duration=0.1:rate=25:color=FFFF00 -i traitTheory.jpeg ^
 -filter_complex ^
"[0:v][1:v]overlay=(main_w-overlay_w)/2:(main_h-overlay_h)/2[v0];^
[3:v]scale=iw*min(1366/iw\,768/ih):ih*min(1366/iw\,768/ih)[ovrl],^
[2:v][ovrl]overlay=(main_w-overlay_w)/2:(main_h-overlay_h)/2[v1];^
[v0][v1]concat=n=2:v=1[outv]" -map "[outv]" -y concatSingle.mp4

Combine 3 videos

source

ffmpeg -y -i "input1.mkv" -i "bumper.mkv" -i "input2.mkv" -filter_complex '[0:v]scale=1280x720:force_original_aspect_ratio=increase[v0],pad=1280x720:max(0\,(ow-iw)/2):max(0\,(oh-ih)/2):black[v0]; [1:v]scale=1280x720:force_original_aspect_ratio=increase[v1],pad=1280x720:max(0\,(ow-iw)/2):max(0\,(oh-ih)/2):black[v1]; [2:v]scale=1280x720:force_original_aspect_ratio=increase[v2],pad=1280x720:max(0\,(ow-iw)/2):max(0\,(oh-ih)/2):black[v2]; [v0][0:a][v1][1:a][v2][2:a]concat=n=3:v=1:a=1 [outv] [outa]' -map "[outv]" -map "[outa]" 'output.mkv'

Split a file into multiple parts

source

ffmpeg -y \
-i "Robotica_1080.mkv" \
-filter_complex "[0:v]split=2[v1][v2]; \
[v1]scale=640:360,setpts=PTS-STARTPTS[vout1]; \
[v2]trim=10:15,scale=640:360,setpts=PTS-STARTPTS[vout2]; \
[0:a]asplit=2[a1][a2]; \
[a1]anull,asetpts=PTS-STARTPTS[aout1]; \
[a2]atrim=10:15,asetpts=PTS-STARTPTS[aout2]; \
[vout1][aout1]concat=n=2:v=1:a=1[vout1][aout1]; \
[vout2][aout2]concat=n=2:v=1:a=1[vout2][aout2]" \
-map [vout1] -map [aout1] "1.mp4" \
-map [vout2] -map [aout2] "2.mp4"

Note 'PTS'

PTS stands for Presentation TimeStamps. See What is video timescale, timebase, or timestamp in ffmpeg?

The setpts filter evaluates the expression and assigns the value as the timestamp for the current frame it is processing

Split Video only into 2 files

ffmpeg -y ^
-i "concatSingle.mp4" ^
-filter_complex "[0:v]split=2[v1][v2];[v1]trim=0:3,scale=640:360,setpts=PTS-STARTPTS[vout1];[v2]trim=4:6,scale=640:360,setpts=PTS-STARTPTS[vout2]" -map [vout1]  "1.mp4" -map [vout2]  "2.mp4"

Good Resource

Fade Overlay text

source

ffmpeg -y -i input.mp4 -filter_complex "[0]split[base];drawtext=fontfile=HelveticaNeue.ttf:text='Testing': fontcolor=white:\
fontsize=40: box=1: boxcolor=black@0.5:boxborderw=5:x=(w-text_w)/2:y=(h-text_h)/2,format=yuva444p,fade=t=in:st=2:d=1:alpha=1,fade=t=out:st=3:d=1:alpha=1[subtitles]; \
[base][subtitles]overlay" output.mp4

Applying in blank image

ffmpeg  -y -f lavfi -i color=size=1366x768:duration=10:rate=25:color=FF00FF -filter_complex ^
"[0]split[base];drawtext=fontfile=C\\:/Windows/Fonts/arial.ttf:text='Testing': fontcolor=white:fontsize=40: x=(w-text_w)/2:y=(h-text_h)/2,format=yuva444p,fade=t=in:st=2:d=3:alpha=1[subtitles];[base][subtitles]overlay" videoWithFadingText.mp4

Another

ffmpeg -y -i vlogOpener1366x768.mp4 -filter_complex "[0]split[base];drawtext=fontfile=C\\:/Windows/Fonts/ITCBLKAD.TTF:fontsize=85:fontcolor=black:x=(w-text_w)/2:y=(h-text_h-200)/2:text='Learning   Psychology',format=yuva444p,fade=t=in:st=3:d=3:alpha=1[subtitles];[base][subtitles]overlay"  openerWithFadingText.mp4

Fade in and out with box

ffmpeg  -y -f lavfi -i color=size=1366x768:duration=5:rate=25:color=FFFFFF -filter_complex ^
"[0]split[base];drawtext=fontfile=C\\:/Windows/Fonts/arial.ttf:text='Credits': fontcolor=black:fontsize=40: box=1:^ boxcolor=FFFF00@0.5:boxborderw=5:x=(w-text_w)/2:y=(h-text_h)/2,format=yuva444p,fade=t=in:st=0:d=1:alpha=1,fade=t=out:st=3:d=1:alpha=1[subtitles];[base][subtitles]overlay" videoWithFadingText2.mp4

multiple line text

source

ffmpeg -i test_in.avi -vf "[in]drawtext=fontsize=20:fontcolor=White:fontfile='/Windows/Fonts/arial.ttf':text='onLine1':x=(w)/2:y=(h)/2, drawtext=fontsize=20:fontcolor=White:fontfile='/Windows/Fonts/arial.ttf':text='onLine2':x=(w)/2:y=((h)/2)+25, drawtext=fontsize=20:fontcolor=White:fontfile='/Windows/Fonts/arial.ttf':text='onLine3':x=(w)/2:y=((h)/2)+50[out]" -y test_out.avi

ffmpeg -y -f lavfi -i color=size=1366x768:duration=8:rate=25:color=FFFFFF -filter_complex  "[0]split[base][textLayer];[textLayer]drawtext=fontsize=20:fontcolor=black:fontfile=C\\:/Windows/Fonts/arial.ttf:text='onLine1':x=(w)/2:y=(h)/2, drawtext=fontsize=20:fontcolor=black:fontfile=C\\:/Windows/Fonts/arial.ttf:text='onLine2':x=(w)/2:y=((h)/2)+25, drawtext=fontsize=20:fontcolor=black:fontfile=C\\:/Windows/Fonts/arial.ttf:text='onLine3':x=(w)/2:y=((h)/2)+50,format=yuva444p,fade=t=in:st=3:d=1:alpha=1,fade=t=out:st=6:d=1:alpha=1[subtitles];[base][subtitles]overlay" multiLineFading.mp4

Get Width X Height

source

rem Example 1: With keys / variable names
ffprobe -v error -show_entries stream=width,height -of default=noprint_wrappers=1 input.mp4
rem output will be 
rem width=1280
rem height=720
rem Example 2: Just width x height
ffprobe -v error -select_streams v -show_entries stream=width,height -of csv=p=0:s=x input.m4v
rem output will be 
rem 1280x720
rem Example 3: JSON
ffprobe -v error -select_streams v -show_entries stream=width,height -of json ^
input.mkv 
rem output will be 
{
    "programs": [

    ],
    "streams": [
        {
            "width": 1280,
            "height": 720
        }
    ]
}
rem Example 4: JSON Compact
ffprobe -v error -select_streams v -show_entries stream=width,height -of json=compact=1 input.mkv 
rem output will be 
{
    "programs": [

    ],
    "streams": [
        { "width": 1280, "height": 720 }
    ]
}
rem Example 5: XML
ffprobe -v error -select_streams v -show_entries stream=width,height -of xml input.mkv
rem output will be  
<?xml version="1.0" encoding="UTF-8"?>
<ffprobe>
    <programs>
    </programs>

    <streams>
        <stream width="1280" height="720"/>
    </streams>
</ffprobe>
rem Example 6 : Just get width and Height
ffprobe -v quiet -show_entries "stream=width" -of "compact=p=0:nk=1" B1U1.mp4
rem output will be
1366
ffprobe -v quiet -show_entries "stream=height" -of "compact=p=0:nk=1" B1U1.mp4
rem output will be
768

Get width & height to a variable inside .bat file

Source

for /f %i in ('ffprobe -v quiet -show_entries "stream=width" -of "compact=p=0:nk=1" input.mkv') do set width=%i
for /f %i in ('ffprobe -v quiet -show_entries "stream=height" -of "compact=p=0:nk=1" input.mkv') do set height=%i

for /f %i in ('ffprobe -v quiet -show_entries "stream=width" -of "compact=p=0:nk=1" traitTheory.jpeg') do set width=%i
for /f %i in ('ffprobe -v quiet -show_entries "stream=height" -of "compact=p=0:nk=1" traitTheory.jpeg') do set height=%i
echo %width%
echo %height%

Logical operators in bat file

source
You can do AND with nested conditions:

if %age% geq 2 (
    if %age% leq 12 (
        set class=child
    )
)

or:

if %age% geq 2 if %age% leq 12 set class=child

You can do OR with a separate variable:

set res=F
if %hour% leq 6 set res=T
if %hour% geq 22 set res=T
if "%res%"=="T" (
    set state=asleep
)

Compare ops in .bat file

source

    EQU - equal
    NEQ - not equal
    LSS - less than
    LEQ - less than or equal
    GTR - greater than
    GEQ - greater than or equal

ffmpeg draw a line from point to point

source
There is no drawline filter in ffmpeg, so I'd assume 'drawbox' would need to be used`

 ffmpeg -i input.mp4 -vf drawbox=x=10:y=10:w=692:h=1:color=red output.mp4

 ffmpeg -y -i 1.mp4 -vf drawbox=x=10:y=10:w=100:h=1:color=red lined1.mp4

slanting line

(45 degree)

ffmpeg -i in.mp4 -filter_complex 
      "color=red:s=490x490,geq=lum='p(X,Y))':a='if(eq(X,Y),255,0)';
       [0]overlay=10:10:shortest=1" out.mp4

add silent audio


ffmpeg -y -f lavfi -i aevalsrc=0 -f lavfi -i color=size=1366x768:duration=5:rate=25:color=FF00FF -c:v copy -c:a aac -map 0 -map 1:v -shortest output.mov

for mp4 it has to be 2 step process

ffmpeg -y -f lavfi -i color=size=1366x768:duration=5:rate=25:color=FF00FF  silentVideo.mp4
ffmpeg -y -i silentVideo.mp4 -f lavfi -i anullsrc=channel_layout=stereo:sample_rate=44100 -c:v copy -shortest output.mp4

Replace, add & mix videos

resource

replace

ffmpeg -i video.mp4 -i audio.wav -map 0:v -map 1:a -c:v copy -shortest output.mp4

add

ffmpeg -i video.mkv -i audio.mp3 -map 0 -map 1:a -c:v copy -shortest output.mkv

mix

ffmpeg -y -i silentVideo.mp4 -i "G:\studio\soundEffects\ting.mp3" -i E:\projects\tests\ReactJS\vlogMaker\BGs\Uncaria-Espionage.mp3 -filter_complex "[1:a][2:a]amix=2[aud_fin]"  -map 0:v -map [aud_fin] -c:v copy -c:a aac -b:a 256k -t 8 "diffAudioDiffTimes.mp4"

rem Mix Multiple audios at multiple times

ffmpeg -y -i output.mp4 -i "G:\studio\soundEffects\ting.mp3" -i "G:\studio\soundEffects\waterDrops.mp3" -filter_complex "[1]adelay=1000|1000[aud1];[2]adelay=3000|3000[aud2];[0][aud1][aud2]amix=3" -c:v copy outWithMutlipleMix.mp4

rem for mp4 silentvideo is okay but not raw video input. use 2 step process in such case
ffmpeg -y -i silentVideo.mp4 -i "G:\studio\soundEffects\ting.mp3" -i "G:\studio\soundEffects\waterDrops.mp3" -filter_complex "[1]adelay=1000|1000[aud1];[2]adelay=3000|3000[aud2];[aud1][aud2]amix=2[aud_fin]"  -map 0:v -map [aud_fin] -c:v copy -c:a aac -b:a 256k "diffAudioDiffTimes.mp4"

using different parts of same video file

ffmpeg -y -i silentVideo.mp4 -i "G:\studio\soundEffects\Cute Sound Effects for Editing  No copyright 128 kbps.mp3"  -filter_complex "[1]atrim=44:45,adelay=1000|1000[aud1];[1]atrim=42:43,adelay=3000|3000[aud2];[aud1][aud2]amix=2[aud_fin]"  -map 0:v -map [aud_fin] -c:v copy -c:a aac -b:a 256k "diffAudioDiffTimes.mp4"

Mix bits along with BG

rem BG :  E:\projects\tests\ReactJS\vlogMaker\BGs\Uncaria-Espionage.mp3
ffmpeg -y -i silentVideo.mp4 -i "G:\studio\soundEffects\Cute Sound Effects for Editing  No copyright 128 kbps.mp3" -i "E:\projects\tests\ReactJS\vlogMaker\BGs\Uncaria-Espionage.mp3" -filter_complex "[1]atrim=44:45,adelay=1000|1000[aud1];[1]atrim=42:43,adelay=3000|3000[aud2];[aud1][aud2][2]amix=3[aud_fin]"  -map 0:v -map [aud_fin] -c:v copy -c:a aac -b:a 256k -shortest "diffAudioDiffTimes.mp4"

Trim videos for filter complex without loosing audio

source

ffmpeg -y -i B1U1WithAudioAndWatermark.mp4 -filter_complex ^
"[0:v] trim=start=5:end=10, setpts=PTS-STARTPTS [v0];^
 [0:a]atrim=start=5:end=10,asetpts=PTS-STARTPTS [a0]" -map "[v0]" -map "[a0]"  vtrimmed.mp4

ffmpeg -y -i B1U1WithAudioAndWatermark.mp4 -filter_complex ^
"[0:v] trim=start=15:end=20, setpts=PTS-STARTPTS [v1];^
 [0:a]atrim=start=15:end=20,asetpts=PTS-STARTPTS [a1]" -map "[v1]" -map "[a1]"  vtrimmed.mp4

Concat vidoes without loosing audio

source

ffmpeg -i B1U1WithAudioAndWatermark.mp4 -filter_complex ^
"[0:v] trim=start=5:end=10, setpts=PTS-STARTPTS [v0];^
 [0:a]atrim=start=5:end=10,asetpts=PTS-STARTPTS [a0];^
 [0:v] trim=start=15:end=20, setpts=PTS-STARTPTS [v1];^
 [0:a]atrim=start=15:end=20,asetpts=PTS-STARTPTS [a1];^
 [v0][a0][v1][a1]concat=n=2:v=1:a=1 [v] [a]" -map "[v]" -map "[a]"   vtrimmedConcat.mp4

Scrolling WaterMark

ffmpeg -i "outputWithAudio.mp4"  -filter_complex drawtext="fontfile=C\\:/Windows/Fonts/ITCBLKAD.TTF:fontsize=20:fontcolor=orange@.5:box=1:boxcolor=white@0.1:shadowcolor=black@0.5:shadowx=2:shadowy=2:text=Water Mark Text':y=h-line_h-2:x=(mod(1*n\,w+tw)-tw)" "outputWithAudioThumbail.mp4" -y

Creating a blank video

for mp4 remove '-c:a pcm_s16be'

otherwise error:

overlap small image on center of blank video

Overlap big image into small Canvas

Create blank image and overlay in one go

Concat 2 files

Create blank image and overlay for 2 images and concat in one go

spliting commands for windows bat

Combine 3 videos

Split a file into multiple parts

Note 'PTS'

Split Video only into 2 files

Fade Overlay text

Applying in blank image

Fade in and out with box

multiple line text

Get Width X Height

Get width & height to a variable inside .bat file

Logical operators in bat file

Compare ops in .bat file

ffmpeg draw a line from point to point

slanting line

add silent audio

for mp4 it has to be 2 step process

Replace, add & mix videos

replace

add

mix

rem Mix Multiple audios at multiple times

using different parts of same video file

Mix bits along with BG

Trim videos for filter complex without loosing audio

Concat vidoes without loosing audio

Scrolling WaterMark

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