[FFmpeg-user] Faster way of cropping video?

[Claudiu Rad]

On 3/18/2015 6:19 PM, JP Edwards wrote:
> Hi,
> I've been cropping a number of mp4 videos with ffmpeg but I was just wondering whether there is a way of doing it that doesn't involve re-encoding.

no, this is not technically possible for obvious reasons: you need to 
decode the frame, crop and re-encode the completely new image. due to 
the very nature of video encoding, you cannot remove portions of an 
image without re-encoding the rest as pixels in an image are strongly 
related.

-- 
Claudiu