[vlc] Re: Debug error messages

[Måns Rullgård]

Laurent Aimar <fenrir at via.ecp.fr> writes:

> On Thu, Apr 14, 2005, Måns Rullgård wrote:
>> Are these transport streams?
>> > Error 1:
>> > main warning: backward_pts != current_pts (-40000)
>> > main debug: stream periodicity changed from P[5] to P[3]
>> > main warning: output date isn't PTS date, requesting resampling (62870)
>> > main warning: buffer is 60704 late, triggering upsampling
>> > main warning: PTS is out of range (-7266), dropping buffer
>> > main warning: PTS is out of range (-30044), dropping buffer
>> > main warning: output date isn't PTS date, requesting resampling (42453)
>> > main warning: buffer is 60685 late, triggering upsampling
>> >
>> > Now I'm assuming this refering to the PTS time-stamps jumping
>> > backwards in time occasionally. Likely causes of this being packets
>> > delivered out of order, or possibly dropping some packets
>> 
>> Those errors usually indicate bad PCR values in the TS.
>  It can be bad PCR value or bad pts/dts value.

Bad PCR is by far more common than bad PTS.

>> > Error 2:
>> > main warning: late picture skipped (173512)
>> > main warning: late picture skipped (133512)
>> > main warning: late picture skipped (92089)
>> > main warning: late picture skipped (52089)
>  Too slow computer or bad PCR or to late/slow delivery.

That slow computers are rare nowadays.

>> The exact *meaning* of those error remains a mystery.  I have been
>> asking occasionally for a couple of years, and have yet to receive any
>> answer.
>  Is your question : "why bad PCR leads to thoses messages ?"

My question is more like, how can I tell from those messages what is
wrong with the PCR?



-- 
Måns Rullgård
mru at inprovide.com

-- 
This is the vlc mailing-list, see http://www.videolan.org/vlc/
To unsubscribe, please read http://www.videolan.org/support/lists.html