What is ffmpeg?

1. Rip VHS to AVI via VirtualDub
2. Upscale, resample, and deinterlace raw file in VirtualDub (Break out large video into separate pieces here using batch operations)
3. Compress video(s) with Handbrake
4. Touch up file(s) with ffmpeg commands

https://www.youtube.com/watch?v=sn_TDa9zY1c

1. Use Handbrake
2. Touch up files with ffmpeg commands if home videos

1. Use MakeMKV
2. If looking to compress, use Handbrake post-MakeMKV

https://ffmpeg.org/ffmpeg.html#Description http://ankitshah009.blogspot.com/2015/02/useful-ffmpeg-commands.html

https://support.google.com/youtube/answer/1722171

ffmpeg -i input -c:v libx264 -preset slow -profile:v high -crf 18 -coder 1 -pix_fmt yuv420p -movflags +faststart -g 30 -bf 2 -c:a aac -b:a 384k -profile:a aac_low output

for %%a in ("*.fileformat") do //insert ffmpeg command here//

Instead of the filepath or filename in your ffmpeg command use these shortcuts:

For %%A in ("%filename%") do (
    echo full path: %%~fA
    echo drive: %%~dA
    echo path: %%~pA
    echo file name only: %%~nA
    echo extension only: %%~xA
    echo expanded path with short names: %%~sA
    echo attributes: %%~aA
    echo date and time: %%~tA
    echo size: %%~zA
    echo drive + path: %%~dpA
    echo name.ext: %%~nxA
    echo full path + short name: %%~fsA)

So, for example, this script would take every m4v file inside of a folder, offset the audio back 1/4 of a second, and output it as a copy of the original file while keeping the same filename:

for %%a in ("*.m4v") do filepath-to-ffmpeg.exe -i "%%a" -itsoffset -0.25 -i "%%a" -map 0:v -map 1:a -c copy "filepath-to-other-folder\%%~na.m4v"

https://forum.videohelp.com/threads/356314-How-to-batch-convert-multiplex-any-files-with-ffmpeg https://stackoverflow.com/questions/9252980/how-to-split-the-filename-from-a-full-path-in-batch

http://ksloan.net/watermarking-videos-from-the-command-line-using-ffmpeg-filters/

Example using Batch Script:

for %%a IN (foldername) DO ffmpeg -i %%a -i "Watermark.png" -filter_complex "overlay=0:0" -c:v copy -c:a copy outputfolder\%%a

Example using Powershell:

 gci "videofilefolder" | foreach-object {ffmpeg -i $_.FullName -i "Watermark.png" -filter_complex "overlay=0:0" -c:v copy -c:a copy "outputfolder\$_"}

• https://stackoverflow.com/questions/18444194/cutting-the-videos-based-on-start-and-end-time-using-ffmpeg
• https://unix.stackexchange.com/questions/1670/how-can-i-use-ffmpeg-to-split-mpeg-video-into-10-minute-chunks

Example using Powershell:

ffmpeg -ss 00:53:00 -i 'input' -avoid_negative_ts 1 -to 07:19:17 -c copy 'output'

https://trac.ffmpeg.org/wiki/Concatenate https://stackoverflow.com/questions/7333232/how-to-concatenate-two-mp4-files-using-ffmpeg https://stackoverflow.com/questions/18474312/concatenate-join-mp4-files-using-ffmpeg-and-windows-command-line-batch-not-lin

Example in Batch:

for %i in (*.mkv) do
ffmpeg -i video.mp4 -ss 00:00:00.000 -to 00:01:00.251 -c copy clip1.mp4
ffmpeg -i video.mp4 -ss 00:01:01.251 -to 00:03:30.684 -c copy clip2.mp4
ffmpeg -i video.mp4 -ss 00:05:00.112 -to 00:07:00.254 -c copy clip3.mp4
pause

-itsoffset x.xx time in seconds. so, 0.25 is 1/4 of a second.

Example for adjusting audio, and compressing video:

#Adjusts audio and compresses file to output of your choice
ffmpeg -i 'input' -itsoffset 1.00 -i 'input' -map 0:v -map 1:a 'output'

Example for copying video only:

#Adjust audio, but just copy the file instead of compressing. Can not use an MKV container for this.
ffmpeg -i 'input' -itsoffset 0.25 -i 'input' -map 0:v -map 1:a -c copy 'output'

Example from the link:

ffmpeg -i video.mp4 -af "volume=enable='between(t,5,10)':volume=0, volume=enable='between(t,15,20)':volume=0" ..

https://stackoverflow.com/questions/29215197/mute-specified-sections-of-an-audio-file-using-ffmpeg When entering your time, it must be in seconds only. If you have a very long video, be sure to calculate out the exact seconds and enter that in. Example, four hours is 14400 seconds.

Trying to adjust MKV files. Safe bet, do all adjustments to MP4 file first, then MKV when permanent. - https://superuser.com/questions/1411133/ffmpeg-invalid-length-0x59f0-0x8bd7fe90-in-parent-when-trying-to-do-anything