How to crop Black Bars using FFmpeg while keeping the standard width.

[Wizard]

I tried cropdetect and then cropped using values provided by it. I used a test video of 576p (1024 X 576) so after cropping it became 1088 X 432.

so is there any way to keep the width standard. like 1024 is for 576p and 1280 for 720p. Handbrake does this by managing height. I want to do similar with ffmpeg but I'm not able to find any proper command or flag for that.

Thank You !

[ProWo]

Standard Width for 576 is 720 (PAL), not 1024.
To have standard width you must resize after cropping.

[Wizard]

Standard Width for 576 is 720 (PAL), not 1024.
To have standard width you must resize after cropping.

Sorry I forgot to mention. I'm talking about BluRay encode. not DVD.

[DB83]

But your 576p example does not make any sense.


You appear to be describing non-anamorphic widescreen which fits the widescreen in a 4:3 frame (typically 72 lines of border top and 72 lines bottom). Thus 576 - 144 = 432.


Before the crop that then displays as 768*576 - 1024*576 is reserved for anamorphic widescreen (576/9*16 = 1024).


Crop the bars to retain the 16:9 gives you 432/9*16 which brings you back to your original display width of 768 pixels.


Sorry. I can not assist with ffmpeg commands. This is just the underlying theory.

[davexnet]

See this thread
https://forum.videohelp.com/threads/397745-How-to-crop-Video-with-FFMPEG-without-changing-bitrate