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From: Josef Wolf <jw@raven.inka.de>
To: linux-dvb@linuxtv.org
Subject: Re: [linux-dvb] How to convert MPEG-TS to MPEG-PS on the fly?
Date: Wed, 27 Aug 2008 00:45:19 +0200	[thread overview]
Message-ID: <20080826224519.GL32022@raven.wolf.lan> (raw)
In-Reply-To: <709924.7684.qm@web46108.mail.sp1.yahoo.com>

On Tue, Aug 26, 2008 at 05:00:18AM -0700, barry bouwsma wrote:

> For laughs, I now converted a short BBC-Four TS I had recorded as
> a test with `ts2ps', and there, the PTS/DTS are present in the PS
> and match those seen in the TS...
> 
>      ==> system_clock_reference_base: 859961626 (0x3341f91a)  [= 90 kHz-Timestamp: 2:39:15.1291]

This is a PS pack header, right?

>          ==> PTS: 5154932522 (0x13342072a)  [= 90 kHz-Timestamp: 15:54:37.0280]
>          ==> DTS: 5154921721 (0x13341dcf9)  [= 90 kHz-Timestamp: 15:54:36.9080]
>          ==> PTS: 5154925321 (0x13341eb09)  [= 90 kHz-Timestamp: 15:54:36.9480]
>          ==> PTS: 5154928921 (0x13341f919)  [= 90 kHz-Timestamp: 15:54:36.9880]

Are those PES headers from audio or from video?  Noticed the hop here?

>      ==> system_clock_reference_base: 859937348 (0x33419a44)  [= 90 kHz-Timestamp: 2:39:14.8594]

PS pack header again? Hop backwards from previous pack header?

>          ==> PTS: 5154908244 (0x13341a854)  [= 90 kHz-Timestamp: 15:54:36.7582]
>          ==> PTS: 5154943322 (0x13342315a)  [= 90 kHz-Timestamp: 15:54:37.1480]
>          ==> DTS: 5154932521 (0x133420729)  [= 90 kHz-Timestamp: 15:54:37.0280]
>          ==> PTS: 5154936121 (0x133421539)  [= 90 kHz-Timestamp: 15:54:37.0680]
>          ==> PTS: 5154939721 (0x133422349)  [= 90 kHz-Timestamp: 15:54:37.1080]
>          ==> PTS: 5154954122 (0x133425b8a)  [= 90 kHz-Timestamp: 15:54:37.2680]

Again hops.  Have you tried to play this stream with vlc?

BTW: what is the DTS good for?  Isn't PTS the relevant time for playbacK?
     What difference does it make when a frame was decoded as long as it
     is presented at the correct time?

     And what is the SCRB good for?  I am totally confused by all those times.

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  reply	other threads:[~2008-08-26 22:50 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-08-20 21:10 [linux-dvb] How to convert MPEG-TS to MPEG-PS on the fly? Josef Wolf
2008-08-20 21:17 ` Steven Toth
2008-08-20 21:48   ` Josef Wolf
2008-08-21 12:10     ` barry bouwsma
2008-08-21 17:45       ` Josef Wolf
2008-08-22  1:07         ` Kevin Sheehan
2008-08-22  5:15           ` barry bouwsma
2008-08-22 15:16             ` Josef Wolf
2008-08-22 14:44           ` Josef Wolf
2008-08-22 15:44             ` Nick Ludlam
2008-08-25 19:02               ` Josef Wolf
2008-08-26  6:49                 ` Nico Sabbi
2008-08-26 12:00                   ` barry bouwsma
2008-08-26 22:45                     ` Josef Wolf [this message]
2008-08-27  7:26                       ` barry bouwsma
2008-08-27 22:00                         ` Josef Wolf
2008-08-28 14:40                           ` Johannes Stezenbach
2008-08-28 19:34                             ` Josef Wolf
2008-08-28 21:09                               ` Johannes Stezenbach
2008-08-28 22:48                                 ` Josef Wolf
2008-08-29  5:49                                   ` Josef Wolf
2008-08-29 15:45                       ` [linux-dvb] PTS/DTS clarification (Was: How to convert MPEG-TS to MPEG-PS on the fly?) Josef Wolf
2008-08-26 22:31                   ` [linux-dvb] How to convert MPEG-TS to MPEG-PS on the fly? Josef Wolf
2008-08-21 19:17 ` Josef Wolf
2008-08-21 21:14   ` Josef Wolf
2008-08-22  8:10     ` [linux-dvb] RE : " Thierry Lelegard
2008-08-25 19:55       ` Josef Wolf
2008-08-26  6:50         ` Nico Sabbi
2008-08-26 21:19           ` Josef Wolf
2008-08-22  7:57   ` Thierry Lelegard

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