Find video aspect ratio (not just mediainfo)

ScottJ · 11th May 2014, 19:43

I'm looking for something that can analyze my Blu-ray rips and tell me the exact aspect ratio. Mediainfo always shows 16:9. I want to analyze the video, exclude the black bars, and tell me the size of the active picture area.

I prefer a Linux command-line tool. A GUI like Virtualdub is no good as I need to automate this for hundreds of files.

Purpose is to move my screen-masking system to the right place for each movie. Precision is important; I want to distinguish 2.35 from 2.40, for example.

Motenai Yoda · 11th May 2014, 20:45

mplayer/mencoder/ffmpeg have a filter for this, cropdetect, perhaps starting with these scripts something can be done.

http://takla.wordpress.com/2012/06/01/ffmpeg-autocrop-bash-script-function/

SeeMoreDigital · 11th May 2014, 22:14

Capture a still image and crop away the black mattes to reveal the number of remaining image pixels

ScottJ · 11th May 2014, 23:46

Quote:

Originally Posted by Motenai Yoda

mplayer/mencoder/ffmpeg have a filter for this, cropdetect, perhaps starting with these scripts something can be done.

http://takla.wordpress.com/2012/06/01/ffmpeg-autocrop-bash-script-function/

Excellent! This was a big help.

11th May 2014, 19:43	#1 \| Link
ScottJ Registered User Join Date: Sep 2012 Posts: 22	Find video aspect ratio (not just mediainfo) I'm looking for something that can analyze my Blu-ray rips and tell me the exact aspect ratio. Mediainfo always shows 16:9. I want to analyze the video, exclude the black bars, and tell me the size of the active picture area. I prefer a Linux command-line tool. A GUI like Virtualdub is no good as I need to automate this for hundreds of files. Purpose is to move my screen-masking system to the right place for each movie. Precision is important; I want to distinguish 2.35 from 2.40, for example.

11th May 2014, 20:45	#2 \| Link
Motenai Yoda Registered User Join Date: Jan 2010 Posts: 709	mplayer/mencoder/ffmpeg have a filter for this, cropdetect, perhaps starting with these scripts something can be done. http://takla.wordpress.com/2012/06/01/ffmpeg-autocrop-bash-script-function/ Last edited by Motenai Yoda; 11th May 2014 at 20:47.

11th May 2014, 22:14	#3 \| Link
SeeMoreDigital Life's clearer in 4K UHD Join Date: Jun 2003 Location: Notts, UK Posts: 12,227	Capture a still image and crop away the black mattes to reveal the number of remaining image pixels __________________ \| I've been testing hardware media playback devices and software A/V encoders and decoders since 2001 \| My Network Layout & A/V Gear \|