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Old 5th April 2012, 13:45   #1  |  Link
vesolovski
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DirectShowSource - short freezes

Dear AviSynth users,

I am having following problem with DirectShowSource:

Source clip is smooth, but after rendering it becomes strange - video freezes at some point (or points) (not working), but frame counter still goes on (working fine).

I don't know if this is the problem of AviSynth or maybe ffdshow. If so I still do not know how to fix this. Please provide me with some hints if you can.

I am attaching 3 files to help you visualize problem:
- script.avs
- source.avi (file being read by DirectShowSource)
- render.avi (problematic file received after rendering script.avs)

http://bit.ly/Hk4Sq7
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Old 6th April 2012, 11:22   #2  |  Link
Bloax
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My best guess would be that DirectShowSource is a really bad pick for a source filter that's stupid and is totally OK with skipping frames.
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Old 6th April 2012, 13:36   #3  |  Link
vesolovski
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Thank Bloax for your answer. However if I understand DirectShowSource well, I think it grabs frames from ffdshow "on the fly". If the problem was only with skipping frames, this should not be noticeable. My video freezes for nontrivial period of time (say 0,7 s) - it means DirectShowSource would have to have skipped approximatelly 0,7*29.97 = 21 following frames. I cannot imagine DirectShowSource is that bad. I think it rather skips single (separate) frames.

Summarizing, I would say the problem would or could be with something else.

Last edited by vesolovski; 6th April 2012 at 13:42.
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Old 6th April 2012, 14:07   #4  |  Link
Bloax
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Tried FFMpegSource?
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Old 6th April 2012, 15:32   #5  |  Link
vesolovski
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Yeah, I have.

But it (AviSource as well) has a limit of processed clips in one script file (approximatelly 15 for HD 1080p clips). DirectShowSource does not have such limit (related to memory limit of computer), but it is buggy in my case (problem described above).
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Old 8th April 2012, 02:54   #6  |  Link
Midzuki
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Apparently I managed to make DSS behave "as it should"

Code:
fps=50, convertfps=true, framecount=265
and then:

Code:
AssumeFPS(29.97)
H.T.H.
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Old 8th April 2012, 03:47   #7  |  Link
vesolovski
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Hello Midzuki,
I cannot check it now, but I will be able to do it in few days (trip). I hope it will work also for me. If it will, you are a genius )

Regards,
K.W.
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Old 8th April 2012, 03:59   #8  |  Link
vesolovski
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I checked your solution on different computer. Works perfectly. Ever if I bypass framecount=265 (is it useful?)

As I said before - you are a genius

Last edited by vesolovski; 10th April 2012 at 11:12. Reason: No relation with subject
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Old 8th April 2012, 04:11   #9  |  Link
vesolovski
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One more thing,

I checked this with HD1080 avi source file and rendered avs becomes so very slow. Sound goes at normal speed, but video much much slower
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Old 8th April 2012, 05:37   #10  |  Link
Midzuki
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Quote:
Originally Posted by vesolovski View Post
As I said before - you are a genius
Far from that In fact, I have understood less than 5% of the whole Avisynth thing so far ( even though I'm a semi-regular AVS user since 2007 )

Quote:
One more thing,

I checked this with HD1080 avi source file and rendered avs becomes so very slow. Sound goes at normal speed, but video much much slower
Need More Info


Last edited by Midzuki; 8th April 2012 at 05:38. Reason: spelling
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