[
http://dev.sourcefabric.org/browse/LS-430?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
David Baelde resolved LS-430.
-----------------------------
Resolution: Fixed
I think this problem is satisfyingly fixed. The perfect solution, treating also
audio accesses, will not come before liquidsoap 2, but we should be fine.
> Incorrect position handling when accessing sub-ticks content such as video
> (File "stream/vFrame.ml", line 42, characters 4-10: Assertion failed!)
> -------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: LS-430
> URL: http://dev.sourcefabric.org/browse/LS-430
> Project: Liquidsoap
> Issue Type: Bug
> Components: Liquidsoap
> Affects Versions: 1.0 beta
> Reporter: David Baelde
> Assignee: David Baelde
> Priority: Major
> Fix For: 1.0 beta
>
>
> Simply run the following script to get the failed assertion:
> ./src/liquidsoap
> 'output.dummy(drop_audio((video.add_text("foo",single("demo/bus.ogg")):source(2,1,0))))'
> I use my faithful demo theora file (the guys skiing on a bus roof) but most
> videos should work, provided they don't have a "too perfect" duration that
> makes things work.
> The problem comes from VFrame and affects operators such as video.add_text
> and many others. The mistake is to take a position and convert it to a video
> position without being careful. The position in ticks might not denote
> precisely a video position, and truncating the result of the division misses
> the real problem: in particular there might be no video frame in the chunk of
> stream that we got.
> Strictly speaking the problem affects audio as well when the audio rate is
> less than the master rate, but let's ignore this for now...
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