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Re: ACTION-158: Exhaustive list of Test Cases for the temporal dimension in the Media Fragment URI

From: Silvia Pfeiffer <silviapfeiffer1@gmail.com>
Date: Wed, 7 Apr 2010 12:02:51 +1000
Message-ID: <m2j2c0e02831004061902v44299e16s5e63c38d1632f569@mail.gmail.com>
To: raphael.troncy@eurecom.fr
Cc: Media Fragment <public-media-fragment@w3.org>
2010/4/7 RaphaŽl Troncy <raphael.troncy@cwi.nl>:
>> 10, 11 and 12 have to be diversified based on whether a lies before or
>> after the beginning of the media resource. In fact, we need to
>> introduce something like s=start time and e=end time everywhere. Thus
>> we need to adapt/introduce the following:
>> no5: t=a,b with s<=a, a<b, b<=e †=> †play a to b
>> introduce no5a: t=a,b with a<s, a<b, s<b, b<=e => †play s to b
>> introduce no5b: t=a,b with a<s, a<b, b<s, b<=e => †empty fragment
>> (these include no6 now)
>> no7: t=a,b with s<=a, a<b, a<e, b>e => †play a to e
>> no7a: t=a,b with a<s, a<b, a<e, b>e => †play s to e
>> no7b: t=a,b with a<b, a=>e, b>e => †empty fragment
>> (this last one includes no8 and no9)
>> no10: t=a, with a>=s, a<e => †play a to e
>> no10a: t=a, with a<s, a<e => †play s to e
>> no14: t=,a with a>s, a< †d => †play s to a
>> no14a: t=,a with a<=s, a<d => †empty fragment
> OK, so for all these test cases, you assume fairly that the start time of a
> media resource is not necessarily 0. Is this a frequent case? How many media
> files out there have this property?

It doesn't matter how many exist, but that this case can occur. Thus
we have to cover it in the test case.

>> Yup, listed above as a/b numbers and additional conditions to the ones
>> in the existing list. Mostly related to missing out on defining the
>> "start" time of the resource.
> I would add all these ones if the group feels it is necessary, i.e. there
> _are_ videos that will fall in these cases.

Yes, there definitely will be. The first media fragment server that
provides media fragment queries will create such resources. As we
encourage people to implement such services, we should also provide
for the possibility that such files will exist. Even if only 0.1% of
all files that now exist have that property.

Received on Wednesday, 7 April 2010 02:03:47 UTC

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