[FFmpeg-user] drawtext 4:3 vs 16:9

naser sonbaty naser.sonbaty at gmail.com
Sun May 22 22:30:11 CEST 2016


yes its right both videos are same resolution its a PAL SD video.

The question is how?


On Mon, May 16, 2016 at 9:27 PM, Cley Faye <cleyfaye at gmail.com> wrote:

> 2016-05-14 22:52 GMT+02:00 naser sonbaty <naser.sonbaty at gmail.com>:
> > I need help with filter_complex and drawtext.
> > drawtext on aspect 4:3 are correct but drawtext on aspect 16:9 are
> > stretched.
> >
> ‚ÄčI've tried the drawtext filter with both 4/3 and 16/9, and in both case
> the text was the same (pixel perfect even). No stretch issue.
> It seems that in both your command, the video itself have the same
> resolution (720x576); only the SAR and DAR change. My understanding on it
> is that the DAR is only used for playback, but the SAR is the "real"
> picture. In any case ffmpeg will write the same picture of text on both,
> but the video player will stretch the input video to fit either 4/3 or
> 16/9, including the now hard text.
> If you need to add text to a video with SAR/DAR that won't match, you have
> to do it in a way so that the "stretched" output will look normal.
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