Cela
27th June 2009, 12:57
"Twin-Tower"-Clicks produced by ffmpeg.exe in AVIExtract.cmd of RipBot
AVIExtract.cmd
"D:\RipBot264v1.14.1\Tools\ffmpeg\ffmpeg.exe" -y -i "J:\RipBotInput\Test.avi" -vn -acodec copy "J:\temp\RipBot264temp\job1\audio.1.wav"adds "Twin-Tower-Clicks" which are NOT in the original wav-audio stream of Test.avi.
The "Twin-Tower"-clicks pattern can be seen in Cool Edits's spectral view of "Twin-Tower-Click_example.wav" at 0.800 - 0.850 sec, with center at 0.825 sec. It was cut out of a 2+ hrs wav and represents position 01:26:28.750. There is another one at position 01:21:55.478. And there may be more which I have not found yet.
Questions:
1. Where do these clicks come from? Could it be a ffmpeg buffering issue?
2. How to quickly find them? Quality check of output wav?
These clicks are tiresome to locate. Now I only find these clicks by carefully visually inspecting the spectral view or by careful listening through the whole wav. This can take hours.
I would need an automated quality check procedure: scan the wav and output a cue list of time positions of the centers of "Twin-Towers" patterns found. I tried "Find beat (SHIFT+ö)". But does not work here.
Can anybody help?
AVIExtract.cmd
"D:\RipBot264v1.14.1\Tools\ffmpeg\ffmpeg.exe" -y -i "J:\RipBotInput\Test.avi" -vn -acodec copy "J:\temp\RipBot264temp\job1\audio.1.wav"adds "Twin-Tower-Clicks" which are NOT in the original wav-audio stream of Test.avi.
The "Twin-Tower"-clicks pattern can be seen in Cool Edits's spectral view of "Twin-Tower-Click_example.wav" at 0.800 - 0.850 sec, with center at 0.825 sec. It was cut out of a 2+ hrs wav and represents position 01:26:28.750. There is another one at position 01:21:55.478. And there may be more which I have not found yet.
Questions:
1. Where do these clicks come from? Could it be a ffmpeg buffering issue?
2. How to quickly find them? Quality check of output wav?
These clicks are tiresome to locate. Now I only find these clicks by carefully visually inspecting the spectral view or by careful listening through the whole wav. This can take hours.
I would need an automated quality check procedure: scan the wav and output a cue list of time positions of the centers of "Twin-Towers" patterns found. I tried "Find beat (SHIFT+ö)". But does not work here.
Can anybody help?