View Bug Details
ID | Project | Category | View Status | Date Submitted | Last Update |
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0000758 | DCP-o-matic | Bugs | public | 2015-11-25 12:37 | 2018-10-17 20:16 |
Reporter | carl | Assigned To | carl | ||
Priority | normal | Severity | minor | Reproducibility | have not tried |
Status | closed | Resolution | fixed | ||
Target Version | 2.9.0 | ||||
Summary | 0000758: Audio analysis inefficient | ||||
Description | As user, I'm just interested on the main level and the peak level, just The ffmpeg audio filter volumedetect is very fast to calculate the audio | ||||
Tags | No tags attached. | ||||
Branch | |||||
Estimated weeks required | |||||
Estimated work required | Average | ||||
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Lilian: ffmpeg does it at about 2500fps for a compressed video file, about |
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Lilian: Maybe you should forget about it. Although it might be slower now with EBUR128... |
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Markus Raab says: its not movie depended, it's with all movies. I tested this before on Win7, now I updated to Win10, but stays the same. |
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Reporter 1.X: 7s Ubuntu 14.04, sintel-2048-surround.mp4 opt 1.79: 8s |
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Option to disable EBUR128 added in ca045c71b2e76f86fef1ca99d7e7703a41dfcf33. |
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Tests on Win7 suggest that turning off EBUR128 is enough to get the speed back to 1.79.0 levels; analysing Sintel: 2.6.3 with EBU 54s |
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Need to ask Markus to test. |
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callgrind analysis shows nothing obvious except that EBUR128 is slow and the resampling up to the DCP rate is slow (even with SRC_LINEAR). It doesn't look easy to avoid the resampling altogether though. I believe everything reasonable has been done here. |
Date Modified | Username | Field | Change |
---|---|---|---|
2015-11-25 12:37 | carl | New Bug | |
2015-11-25 12:37 | carl | Target Version | => 2.6.0 |
2015-11-26 09:37 | carl | Note Added: 0001008 | |
2015-11-27 19:13 | carl | Note Added: 0001014 | |
2015-11-30 14:58 | carl | Target Version | 2.6.0 => 2.7.0 |
2016-01-14 10:45 | carl | Note Added: 0001104 | |
2016-03-02 09:55 | carl | Note Added: 0001157 | |
2016-03-02 10:05 | carl | Note Edited: 0001157 | |
2016-03-02 10:20 | carl | Note Edited: 0001157 | |
2016-03-02 10:23 | carl | Note Edited: 0001157 | |
2016-03-02 10:48 | carl | Note Added: 0001158 | |
2016-03-05 23:44 | carl | Note Added: 0001163 | |
2016-03-05 23:44 | carl | Note Added: 0001164 | |
2016-03-05 23:44 | carl | Target Version | 2.7.0 => 2.8.0 |
2016-04-22 15:55 | carl | Target Version | 2.8.0 => 2.9.0 |
2016-06-29 21:10 | carl | Note Added: 0001320 | |
2016-06-29 21:10 | carl | Note Edited: 0001320 | |
2016-06-29 21:10 | carl | Status | new => resolved |
2016-06-29 21:10 | carl | Resolution | open => fixed |
2016-06-29 21:10 | carl | Assigned To | => carl |
2018-10-17 20:16 | carl | Status | resolved => closed |