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Hello, |
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|
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On Sat, 02 Jul 2011, meino.cramer@×××.de wrote: |
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>David Haller <gentoo@×××××××.de> [11-07-02 07:12]: |
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>> On Sat, 02 Jul 2011, meino.cramer@×××.de wrote: |
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>> >is there a software, a tool, a "something" which with it is possible |
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>> >to print the frame numbers of those frames in a video file, which are |
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>> >at positions, where the aspect-ratio changes? |
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>> |
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>> Try |
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>> |
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>> mplayer -nosound -benchmark -vo null FILE |
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>> |
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>> the third column is the frameno and aspect changes should be logged. I |
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>> don't have a file to test with though. |
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> |
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>thank you for your reply ! :) |
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> |
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>It reports the aspect ratio changes...but it does not report the |
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>frames, at which it happens... |
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|
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Have a look at the last frameno of the "progress" before the reported |
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aspect change in mplayer's output. That frame or the following is the |
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one you're looking for. It should look something like this: |
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|
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Movie-Aspect is 1.78:1 - prescaling to correct movie aspect. |
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VO: [null] 640x360 => 640x360 Planar YV12 [zoom] |
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V: 41.7 1044/1044 1% 0% 0.0% 0 0 |
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[aspect change reported here, can't remember what the message is] |
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V: .... [more progress] |
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|
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So, in this constructed case aspect change would be from frame 1044 to |
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frame 1045 I think. |
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|
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This is from memory, so point me to a sample file if you need more |
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details. |
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|
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Oh, you can also use 'avidemux' to load a file and navigate to |
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specific frames. It's just that avidemux doesn't scale anamorphic |
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stuff correctly, so you'd have to look at the output "view" whether an |
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aspect change happens between two frames. |
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|
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There's also a program that tries to detect advertising, IIRC also |
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using aspect changes as indicators. Its name escapes me ATM. |
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|
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HTH, |
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-dnh |
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|
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-- |
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Research is what I'm doing when I don't know what I'm doing. |
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-- Wernher von Braun |