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Add notes on the ?date= format.

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Originally committed as revision 825 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Philip Gladstone 2002-07-27 03:22:55 +00:00
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commit ce83897796
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@ -2,7 +2,7 @@ The FFserver streaming HOWTO
----------------------------
Philip Gladstone <philip-ffserver@gladstonefamily.net>
Last updated: May 16, 2002
Last updated: July 26, 2002
0. What is this HOWTO about?
@ -128,3 +128,34 @@ that will be discarded.
* You may want to adjust the MaxBandwidth in the ffserver.conf to limit
the amount of bandwidth consumed by live streams.
8. Why does the ?buffer / Preroll stop working after a time?
It turns out that (on my machine at least) the number of frames successfully
grabbed is marginally less than the number that ought to be grabbed. This
means that the timestamp in the encoded data stream gets behind real time.
This means that if you say 'preroll 10', then when the stream gets 10
or more seconds behind, there is no preroll left.
Fixing this requires a require in the internals in how timestampts are
handled.
9. Does the ?date= stuff work.
Yes (subject to the caution above). Also note that whenever you start
ffserver, it deletes the ffm file, thus wiping out what you had recorded
before. This behaviour is a temporary fix to various crashes. The aim is
to fix it so that the old data is saved if possible.
The format of the ?date=xxxxxx is fairly flexible. You should use one
of the following formats (the 'T' is literal):
* YYYY-MM-DDTHH:MM:SS (localtime)
* YYYY-MM-DDTHH:MM:SSZ (UTC)
You can omit the YYYY-MM-DD, and then it refers to the current day. However
note that ?date=16:00:00 refers to 4PM on the current day -- this may be
in the future and so unlikely to useful.
You use this by adding the ?date= to the end of the URL for the stream.
For example: http://localhost:8080/test.asf?date=2002-07-26T23:05:00