[FFmpeg-user] Timestamp using PC Clock - possible payment for solution.

[Michael Shaffer]

You could make a Python script that updates a text file with the current
system time. Then use ffmpeg to reload and overlay the text file for each
frame. I have to admit, I tried something similar to this though and
sometimes it would crash because they were both accessing the file.

On Tue, Nov 12, 2019 at 3:37 PM Byron J <byronj64 at gmail.com> wrote:

> Hello,
>
> What are some methods of timestamping video? I found one method using the
> framerate but I would like to use the PC clock.
>
> Any help would be greatly appreciated. If anyone is interested, payment for
> the solution could be a possibility.
>
> Here is the .bat file with the FFMPEG commands running the postprocessing.
>
>
> setlocal
> @echo off
> set sourcefile=%~1
> set destfile=%~2
> shift
> shift
> REM Variables
> set sourcefile=%sourcefile%
> set destfile=%destfile%
> set tempfile=%sourcefile:~0,-3%_tmp.mp4
> set logofile=C:\Users\Public\WinTV\fox49-logo-header-v2.png
> set hour=%sourcefile:~-7,2%
> set min=%sourcefile:~-5,2%
> set year=%date:~10,4%
> set month=%date:~4,2%
> set day=%date:~7,2%
> set dts=%year%_%month%_%day%
> echo WinTV8 Post processing log. > postprocess.log
> echo sourcefile = %sourcefile%  >> postprocess.log
> echo destfile = %destfile% >> postprocess.log
> echo tempfile = %tempfile% >> postprocess.log
> echo logofile = %logofile% >> postprocess.log
> echo hour = %hour% >> postprocess.log
> echo min = %min% >> postprocess.log
> echo dts = %dts% >> postprocess.log
> REM Video Processing
> echo Starting timecode overlay... >> postprocess.log
> ffmpeg -y -i %sourcefile% -b:v 1M -vcodec libx264 -preset ultrafast -s
> 480X360 -vf drawtext="text='%dts%\ \ \ \
> ':timecode='%hour%\:%min%\:00\:00': rate=25:
> fontfile=C\\:\\Windows\\Fonts\\Ariel.ttf: x=400: y=h-lh-1:
>
> fontcolor=white:shadowcolor=black:shadowx=1:shadowy=1:fontsize=72:box=1:boxcolor=black at 0.5
> :boxborderw=5:"
> %tempfile%
> echo End timecode overlay. >> postprocess.log
> echo Starting image overlay... >> postprocess.log
> ffmpeg -y -i %tempfile% -i %logofile% -filter_complex
> "[1:v]format=argb,geq=r='r(X,Y)':a='0.5*alpha(X,Y)'[image];
> [0:v][image]overlay=(main_w-overlay_w-0):(main_h-overlay_h-2)" %destfile%
> echo End image overlay. >> postprocess.log
> REM Validate file exsists and cleanup
> if exist "%destfile%" (
>     del %tempfile% >> postprocess.log
> del %sourcefile% >> postprocess.log
> ) else (
>     echo Error processing file %sourcefile%. >> postprocessing.log
> )
> echo End post processing. >> postprocess.log
> endlocal
>
>
>
>
>
>
>
> Byron Johnson
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