[FFmpeg-user] SMPTE when converting to JPEGs

[Wolfgang Hugemann]

> Is there a formalised way to embed timecode in JPEGs?
> Does the OP mean "burned in?"

Sorry for using the wrong words; I meant "burned in", i.e. written onto 
each frame / JPEG. (As you can tell from my name, I am not a native 
speaker.)

My question is however where exactly ffmpeg's timecode stems from. It 
doesn't seem to be a simple frame count (?).

Wolfgang Hugemann

P.S.:
The Exif timestamp's accuracy is only integer seconds. A more accurate 
timestamp could only be written into the JPEG comment or into the XP 
comment Exif tag, I guess. By default ffmpeg writes the name of the 
codec library (Lavc57.38.100 in my case) into the JPEG comment. I have 
no idea whether you can change this behaviour.