My favorites | Sign in
Project Home Downloads Wiki Issues Source
New issue   Search
  Advanced search   Search tips   Subscriptions
Issue 85: Didn't work with anamorph video
2 people starred this issue and may be notified of changes. Back to list
Status:  New
Owner:  ----

Sign in to add a comment
Reported by, May 7, 2011
If video is anamorphic - thumb has wrong aspect.

ffmpegthumbnailer version: 2.0.2
Linux 2.6.38-9-generic #43-Ubuntu SMP i686 athlon i386 GNU/Linux

Sep 29, 2011
Can you link to a sample file and provide actual and expected values for the thumb? 
Sep 29, 2011
I didn't know how to convert anamorph video. So... here is screanshot:

kdemultimedia-ffmpegthumbs 4.7.1
ffmpeg 20110923
Oct 11, 2011
The scaling is done based on the movie's aspect ratio, not the actual dimensions.

For a movie with this metadata:
Display Aspect Ratio : 16:9
Width                : 720 pixels
Height               : 480 pixels

The height should be 405 for an aspect ratio of 16:9 but it is actually 480, as a result the dimensions and aspect ratio do not match.

Running this command:
$ ffmpegthumbnailer -s 0 -i -o test.png

The resulting thumbnail is 720x405 instead of 720x480, which conforms to the aspect ratio, not the dimensions.

To fix this problem, the scaling should be done based on the actual dimensions, not the aspect ratio.

The function causing the problem is here:

Sign in to add a comment

Powered by Google Project Hosting