Great list, thank you! Also I've found that it is possible to use -2 instead of -1 in scale argument. It will automatically fix value to be divisible by 2.

Thanks, this is pretty useful!

@C0DEF52 using -2 for MP4 scaling is a very good tip,
much better then my original solution to format=pix_fmts=yuv420p,crop=trunc(in_w/2)*2:trunc(in_h/2)*2,scale=-1:360 ^{trac.ffmpeg.org/wiki/Scaling}

Thanks. If someone is getting libfdk_aac unknown lib error, just use "aac" instead

Also this one is for 240p
ffmpeg -i inputVideo.mp4 -threads 0 -preset slow -s 320x240 -c:v libx264 outputVideo.mp4

-qmin and -qmax refer to Quantization and it's important in signal analysis, this picture resume what it "does":

Reference:
https://sisu.ut.ee/sites/default/files/imageprocessing/files/digitizn.pdf

Thank you for that summary. Highly helpful! @ADoncel

nice thanks man

Thanks. If someone is getting libfdk_aac unknown lib error, just use "aac" instead

Also this one is for 240p
ffmpeg -i inputVideo.mp4 -threads 0 -preset slow -s 320x240 -c:v libx264 outputVideo.mp4

Thank you!

Thanks. If someone is getting libfdk_aac unknown lib error, just use "aac" instead

Also this one is for 240p
ffmpeg -i inputVideo.mp4 -threads 0 -preset slow -s 320x240 -c:v libx264 outputVideo.mp4

Thank you x2 😆

[solved]
hi brothers. help me please. i make screen recorder in vb.net only for me. i use m.e. encoder. so my output file name is date hours.xesc.
i need to convert xesc to mp4 files. i use ffmpeg for all jpeg files in folder to mp4 file. this is work. but dont work this code.
i choose height and width for screen recorder.
please help me. i need basic code for convert

Dim args, girdi, cikti As String
girdi = "C:\video\ScreenCapture_12.05.2020 17.16.25.xesc" 'for example
cikti = "C:\videokayit\output.mp4" 'for example
args = "-i " & girdi & " -preset slow -codec:a libfdk_aac -b:a 128k -codec:v libx264 -pix_fmt yuv420p -b:v 1000k -minrate 500k -maxrate 2000k -bufsize 2000k -vf scale=854:480 " & cikti

    Dim proc As New Process
    Dim proci As New ProcessStartInfo
    proci.Arguments = args
    proci.FileName = My.Application.Info.DirectoryPath & "\ffmpeg.exe"
    proci.CreateNoWindow = True
    proci.UseShellExecute = False
    proci.WindowStyle = ProcessWindowStyle.Hidden
    proc.StartInfo = proci
    proc.Start()
    Do Until proc.HasExited = True
        Me.Text = "SAVING"
    Loop
    Me.Text = "Screen Recorder"
    MsgBox("Done") 

i think ffmpeg need good names.
example
ScreenCapture_11.05.2020 19.37.16.xesc is not work
ScreenCapture_11.05.202019.37.16.xesc is work.

new my code

Dim args As String
args = " -y -i C:/videokayit/dene.xesc -s 432x240 -b:v 384k -ac 2 -r 15 -c:v mpeg4 -ar 22050 -b:a 64k -c:a aac C:/videokayit/dene.mp4"
Dim proc As New Process
Dim proci As New ProcessStartInfo
proci.Arguments = args
proci.FileName = My.Application.Info.DirectoryPath & "\ffmpeg.exe"
proci.CreateNoWindow = True
proci.UseShellExecute = False
proci.WindowStyle = ProcessWindowStyle.Hidden
proc.StartInfo = proci

proc.Start()

Do Until proc.HasExited = True
Me.Text = "Saving"
Loop
Me.Text = "Screen recorder"

i think there is typo

https://gist.github.com/dvlden/b9d923cb31775f92fa54eb8c39ccd5a9#mp4---480p

command should be ending with

scale=-1:480 output.mp4

not

scale=854:480 output.mp4

-1 instead of 854

@vodolaz095 Thank you! Fixed!

Hi, overall very helpful, thank you very much! But for the command flags table, the video bitrates -b:v say 1000, 2500, 5000, 8000 by rather should be 1000k, 2500k, 5000k, 8000k. I encoded a video with 2500 bit and well, its kind ugly :D