Time Lapse ffmpeg on Windows

YellowHammer · March 2016

Hey,

I'm using Repetier-Server for quite some time, recently I get some webcam and decided to connect it and start using all the RS features. Webcam is working perfectly, the problem is with the timelapse. I installed ffmpeg from https://ffmpeg.zeranoe.com/builds/, pointed Repetier-Server into C:\ffmpeg\bin\ffmpeg.exe. As soon as it tries to compile images into the movie I'm getting:

[concat @ 03d1ac80] Unsafe file name 'C:\ProgramData\Repetier-Server\printer\Prusa_i3\timelapse\20160318T072425_foodclip\image_00000000.jpg'C:\ProgramData\Repetier-Server\printer\Prusa_i3\timelapse\20160318T072425_foodclip\input.txt: Operation not permitted

In server.log the action executed is:

C:\ffmpeg\bin\ffmpeg.exe -loglevel error -f concat -i C:\ProgramData\Repetier-Server\printer\Prusa_i3\timelapse\20160318T072425_foodclip\input.txt -c:v libx264 -threads 1 -r 30 -pix_fmt yuv420p -profile:v baseline -level 3.0 -movflags +faststart -b:v 1000k -y C:\ProgramData\Repetier-Server\printer\Prusa_i3\timelapse\20160318T072425_foodclip\video.mp4

Is it some known issue with ffmpeg for windows? Or I messed up something?

Thanks

Repetier · March 2016

Never had this. Can you check if

C:\ProgramData\Repetier-Server\printer\Prusa_i3\timelapse\20160318T072425_foodclip\input.txt

exists and what the content is. Seems it has to do with that file also I don't know what they mean with unsafe file name.

YellowHammer · March 2016

After quick investigation I found that new ffmpeg implementation has function safe_filename()

https://ffmpeg.org/doxygen/2.1/concatdec_8c_source.html

This function is breaking on ':' character in C:\ProgramData.

I resolve the issue by downloading older version of ffmpeg for windows:

https://ffmpeg.zeranoe.com/builds/win32/static/ffmpeg-1.2-win32-static.7z

Now everything is working perfectly, but maybe you need to revisit you implementation.

Thanks

Repetier · March 2016

Looks like it concats the input.txt directory, so using relative names would solve it for all versions. Will test this solution for next update. Thanks for the hint.

Time Lapse ffmpeg on Windows

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