Re: [vdr] PCR pid
On 26.01.2010 18:36, Klaus Schmidinger wrote:
On 24.01.2010 19:22, André Weidemann wrote:
On 24.01.2010 18:14, Klaus Schmidinger wrote:
On 24.01.2010 17:24, André Weidemann wrote:
Hi Klaus,
On 24.01.2010 16:28, Klaus Schmidinger wrote:
On 11.01.2010 06:19, VDR User wrote:
On Sun, Jan 10, 2010 at 12:30 AM, Giampaolo Sica
wrote:
My Samsung linux based TV set (http://samygo.sourceforge.net/) won't
play
.TS without PCR (both h.264 and mpeg2).
Windows media player in windows 7 can play mpeg2 and H.264 .TS only
with PCR
pid.
I haven't tried any other player.
I would say your problem should be addressed within your hacked tv
firmware. However, if there is a real need for PCR then I'm sure
Klaus will consider it.
In an attempt to debug this I just made some recordings from channels
with VPID==PPID and VPID!=PPID, namely
RTL Television,RTL;RTL
World:12187:hC34M2O0S0:S19.2E:27500:163=2:104=deu;106=deu:105:0:12003:1:1089:0
BVN;CANALDIGITAAL:12574:hC56M2O0S0:S19.2E:22000:515+8190=2:96=dut:36:0:5025:53:1109:0
Both recordings were replayed without problems using the Windows Media
Player
on Windows XP. It didn't even make a difference whether the PCR pid in
the
PMT was set to an actual value or to 0x1FFF.
I was under the impression that the WMP was one of those players
that have problems if there is no PCR, but apparently it plays just
fine...
Could you please do a quick test with VLC 1.0.3 under Windows? I cannot
replay any recordings made from AnixeHD recorded with vdr-1.7.11. Upon
replay I only get a still picture of the first recorded frame.
Are you referring to
ANIXE
HD;BetaDigital:10832:hC23M5O35S1:S19.2E:22000:767=27:0;771=deu:0:1:61202:1:1057:0
Yes, this is it.
--- remux.c 2010/01/23 15:39:15 2.38
+++ remux.c 2010/01/24 15:18:29 2.39
@@ -295,7 +295,7 @@
numPmtPackets = 0;
if (Channel) {
int Vpid = Channel->Vpid();
- int Ppid = 0x1FFF; // no PCR pid
+ int Ppid = Channel->Ppid();
uchar *p = buf;
int i = 0;
p[i++] = 0x02; // table id
That should fix it - this channel doesn't have a separate PCR pid.
The above patch fixes the replay problem with VLC. Thank you.
Have you tested with both versions, PPID==VPID and PPID!=VPID?
I am sorry for the late reply.
I had only tested replaying a recording from AnixeHD with the above
patch applied.
I went through my channels list today, searching for a channel where
PPID!=VPID, but could not find one at first glance.
André
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Re: [vdr] PCR pid
On 24.01.2010 18:37, Petri Hintukainen wrote: > Klaus Schmidinger wrote: >> I was under the impression that the WMP was one of those players >> that have problems if there is no PCR, but apparently it plays just fine... > > When I used vlc with streamdev (few years ago), vlc refused to play http > streams without PCR. But I don't know if recent versions still require > PCR. I have now tested with VLC and apparently it does refuse to play a stream without PCR - although according to http://www.videolan.org/developers/vls/doc/developer/vls-devel/c327.htm it obviously could (see section "Using or not PCRs"). In version 1.7.12 VDR will record the PCR data in case it uses a different PID than the video. With that, VLC can replay such recordings. Klaus ___ vdr mailing list vdr@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr
Re: [vdr] PCR pid
On 24.01.2010 19:22, André Weidemann wrote:
> On 24.01.2010 18:14, Klaus Schmidinger wrote:
>> On 24.01.2010 17:24, André Weidemann wrote:
>>> Hi Klaus,
>>>
>>> On 24.01.2010 16:28, Klaus Schmidinger wrote:
On 11.01.2010 06:19, VDR User wrote:
> On Sun, Jan 10, 2010 at 12:30 AM, Giampaolo Sica
> wrote:
>> My Samsung linux based TV set (http://samygo.sourceforge.net/) won't
>> play
>> .TS without PCR (both h.264 and mpeg2).
>> Windows media player in windows 7 can play mpeg2 and H.264 .TS only
>> with PCR
>> pid.
>> I haven't tried any other player.
>
> I would say your problem should be addressed within your hacked tv
> firmware. However, if there is a real need for PCR then I'm sure
> Klaus will consider it.
In an attempt to debug this I just made some recordings from channels
with VPID==PPID and VPID!=PPID, namely
RTL Television,RTL;RTL
World:12187:hC34M2O0S0:S19.2E:27500:163=2:104=deu;106=deu:105:0:12003:1:1089:0
BVN;CANALDIGITAAL:12574:hC56M2O0S0:S19.2E:22000:515+8190=2:96=dut:36:0:5025:53:1109:0
Both recordings were replayed without problems using the Windows Media
Player
on Windows XP. It didn't even make a difference whether the PCR pid in
the
PMT was set to an actual value or to 0x1FFF.
I was under the impression that the WMP was one of those players
that have problems if there is no PCR, but apparently it plays just
fine...
>>>
>>> Could you please do a quick test with VLC 1.0.3 under Windows? I cannot
>>> replay any recordings made from AnixeHD recorded with vdr-1.7.11. Upon
>>> replay I only get a still picture of the first recorded frame.
>>
>> Are you referring to
>>
>>ANIXE
>> HD;BetaDigital:10832:hC23M5O35S1:S19.2E:22000:767=27:0;771=deu:0:1:61202:1:1057:0
>>
>
> Yes, this is it.
>
>> --- remux.c 2010/01/23 15:39:15 2.38
>> +++ remux.c 2010/01/24 15:18:29 2.39
>> @@ -295,7 +295,7 @@
>> numPmtPackets = 0;
>> if (Channel) {
>>int Vpid = Channel->Vpid();
>> - int Ppid = 0x1FFF; // no PCR pid
>> + int Ppid = Channel->Ppid();
>>uchar *p = buf;
>>int i = 0;
>>p[i++] = 0x02; // table id
>>
>> That should fix it - this channel doesn't have a separate PCR pid.
>
> The above patch fixes the replay problem with VLC. Thank you.
Have you tested with both versions, PPID==VPID and PPID!=VPID?
Klaus
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Re: [vdr] PCR pid
On 24.01.2010 18:14, Klaus Schmidinger wrote:
On 24.01.2010 17:24, André Weidemann wrote:
Hi Klaus,
On 24.01.2010 16:28, Klaus Schmidinger wrote:
On 11.01.2010 06:19, VDR User wrote:
On Sun, Jan 10, 2010 at 12:30 AM, Giampaolo Sica wrote:
My Samsung linux based TV set (http://samygo.sourceforge.net/) won't
play
.TS without PCR (both h.264 and mpeg2).
Windows media player in windows 7 can play mpeg2 and H.264 .TS only
with PCR
pid.
I haven't tried any other player.
I would say your problem should be addressed within your hacked tv
firmware. However, if there is a real need for PCR then I'm sure
Klaus will consider it.
In an attempt to debug this I just made some recordings from channels
with VPID==PPID and VPID!=PPID, namely
RTL Television,RTL;RTL
World:12187:hC34M2O0S0:S19.2E:27500:163=2:104=deu;106=deu:105:0:12003:1:1089:0
BVN;CANALDIGITAAL:12574:hC56M2O0S0:S19.2E:22000:515+8190=2:96=dut:36:0:5025:53:1109:0
Both recordings were replayed without problems using the Windows Media
Player
on Windows XP. It didn't even make a difference whether the PCR pid in
the
PMT was set to an actual value or to 0x1FFF.
I was under the impression that the WMP was one of those players
that have problems if there is no PCR, but apparently it plays just
fine...
Could you please do a quick test with VLC 1.0.3 under Windows? I cannot
replay any recordings made from AnixeHD recorded with vdr-1.7.11. Upon
replay I only get a still picture of the first recorded frame.
Are you referring to
ANIXE
HD;BetaDigital:10832:hC23M5O35S1:S19.2E:22000:767=27:0;771=deu:0:1:61202:1:1057:0
Yes, this is it.
--- remux.c 2010/01/23 15:39:15 2.38
+++ remux.c 2010/01/24 15:18:29 2.39
@@ -295,7 +295,7 @@
numPmtPackets = 0;
if (Channel) {
int Vpid = Channel->Vpid();
- int Ppid = 0x1FFF; // no PCR pid
+ int Ppid = Channel->Ppid();
uchar *p = buf;
int i = 0;
p[i++] = 0x02; // table id
That should fix it - this channel doesn't have a separate PCR pid.
The above patch fixes the replay problem with VLC. Thank you.
Regards.
André
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Re: [vdr] PCR pid
Klaus Schmidinger wrote: > I was under the impression that the WMP was one of those players > that have problems if there is no PCR, but apparently it plays just fine... When I used vlc with streamdev (few years ago), vlc refused to play http streams without PCR. But I don't know if recent versions still require PCR. There is one case where PCR would be useful. When recording is streamed over udp/rtp, one needs to re-generate the original transmission rate. The easiest way to do this is to sync PCR to local clock. - Petri ___ vdr mailing list vdr@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr
Re: [vdr] PCR pid
On 24.01.2010 17:24, André Weidemann wrote:
> Hi Klaus,
>
> On 24.01.2010 16:28, Klaus Schmidinger wrote:
>> On 11.01.2010 06:19, VDR User wrote:
>>> On Sun, Jan 10, 2010 at 12:30 AM, Giampaolo Sica wrote:
My Samsung linux based TV set (http://samygo.sourceforge.net/) won't
play
.TS without PCR (both h.264 and mpeg2).
Windows media player in windows 7 can play mpeg2 and H.264 .TS only
with PCR
pid.
I haven't tried any other player.
>>>
>>> I would say your problem should be addressed within your hacked tv
>>> firmware. However, if there is a real need for PCR then I'm sure
>>> Klaus will consider it.
>>
>> In an attempt to debug this I just made some recordings from channels
>> with VPID==PPID and VPID!=PPID, namely
>>
>> RTL Television,RTL;RTL
>> World:12187:hC34M2O0S0:S19.2E:27500:163=2:104=deu;106=deu:105:0:12003:1:1089:0
>>
>> BVN;CANALDIGITAAL:12574:hC56M2O0S0:S19.2E:22000:515+8190=2:96=dut:36:0:5025:53:1109:0
>>
>>
>> Both recordings were replayed without problems using the Windows Media
>> Player
>> on Windows XP. It didn't even make a difference whether the PCR pid in
>> the
>> PMT was set to an actual value or to 0x1FFF.
>>
>> I was under the impression that the WMP was one of those players
>> that have problems if there is no PCR, but apparently it plays just
>> fine...
>
> Could you please do a quick test with VLC 1.0.3 under Windows? I cannot
> replay any recordings made from AnixeHD recorded with vdr-1.7.11. Upon
> replay I only get a still picture of the first recorded frame.
Are you referring to
ANIXE
HD;BetaDigital:10832:hC23M5O35S1:S19.2E:22000:767=27:0;771=deu:0:1:61202:1:1057:0
Please try
--- remux.c 2010/01/23 15:39:15 2.38
+++ remux.c 2010/01/24 15:18:29 2.39
@@ -295,7 +295,7 @@
numPmtPackets = 0;
if (Channel) {
int Vpid = Channel->Vpid();
- int Ppid = 0x1FFF; // no PCR pid
+ int Ppid = Channel->Ppid();
uchar *p = buf;
int i = 0;
p[i++] = 0x02; // table id
That should fix it - this channel doesn't have a separate PCR pid.
Klaus
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Re: [vdr] PCR pid
Hi Klaus, On 24.01.2010 16:28, Klaus Schmidinger wrote: On 11.01.2010 06:19, VDR User wrote: On Sun, Jan 10, 2010 at 12:30 AM, Giampaolo Sica wrote: My Samsung linux based TV set (http://samygo.sourceforge.net/) won't play .TS without PCR (both h.264 and mpeg2). Windows media player in windows 7 can play mpeg2 and H.264 .TS only with PCR pid. I haven't tried any other player. I would say your problem should be addressed within your hacked tv firmware. However, if there is a real need for PCR then I'm sure Klaus will consider it. In an attempt to debug this I just made some recordings from channels with VPID==PPID and VPID!=PPID, namely RTL Television,RTL;RTL World:12187:hC34M2O0S0:S19.2E:27500:163=2:104=deu;106=deu:105:0:12003:1:1089:0 BVN;CANALDIGITAAL:12574:hC56M2O0S0:S19.2E:22000:515+8190=2:96=dut:36:0:5025:53:1109:0 Both recordings were replayed without problems using the Windows Media Player on Windows XP. It didn't even make a difference whether the PCR pid in the PMT was set to an actual value or to 0x1FFF. I was under the impression that the WMP was one of those players that have problems if there is no PCR, but apparently it plays just fine... Could you please do a quick test with VLC 1.0.3 under Windows? I cannot replay any recordings made from AnixeHD recorded with vdr-1.7.11. Upon replay I only get a still picture of the first recorded frame. Regards André ___ vdr mailing list vdr@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr
Re: [vdr] PCR pid
On 11.01.2010 06:19, VDR User wrote: > On Sun, Jan 10, 2010 at 12:30 AM, Giampaolo Sica wrote: >> My Samsung linux based TV set (http://samygo.sourceforge.net/) won't play >> .TS without PCR (both h.264 and mpeg2). >> Windows media player in windows 7 can play mpeg2 and H.264 .TS only with PCR >> pid. >> I haven't tried any other player. > > I would say your problem should be addressed within your hacked tv > firmware. However, if there is a real need for PCR then I'm sure > Klaus will consider it. In an attempt to debug this I just made some recordings from channels with VPID==PPID and VPID!=PPID, namely RTL Television,RTL;RTL World:12187:hC34M2O0S0:S19.2E:27500:163=2:104=deu;106=deu:105:0:12003:1:1089:0 BVN;CANALDIGITAAL:12574:hC56M2O0S0:S19.2E:22000:515+8190=2:96=dut:36:0:5025:53:1109:0 Both recordings were replayed without problems using the Windows Media Player on Windows XP. It didn't even make a difference whether the PCR pid in the PMT was set to an actual value or to 0x1FFF. I was under the impression that the WMP was one of those players that have problems if there is no PCR, but apparently it plays just fine... Klaus ___ vdr mailing list vdr@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr
Re: [vdr] PCR pid
On Sun, Jan 10, 2010 at 12:30 AM, Giampaolo Sica wrote: > My Samsung linux based TV set (http://samygo.sourceforge.net/) won't play > .TS without PCR (both h.264 and mpeg2). > Windows media player in windows 7 can play mpeg2 and H.264 .TS only with PCR > pid. > I haven't tried any other player. I would say your problem should be addressed within your hacked tv firmware. However, if there is a real need for PCR then I'm sure Klaus will consider it. ___ vdr mailing list vdr@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr
Re: [vdr] PCR pid
My Samsung linux based TV set (http://samygo.sourceforge.net/) won't play .TS without PCR (both h.264 and mpeg2). Windows media player in windows 7 can play mpeg2 and H.264 .TS only with PCR pid. I haven't tried any other player. -Original Message- From: vdr-boun...@linuxtv.org [mailto:vdr-boun...@linuxtv.org] On Behalf Of Klaus Schmidinger Sent: sabato 9 gennaio 2010 12.10 To: vdr@linuxtv.org Subject: Re: [vdr] PCR pid On 08.01.2010 20:16, Giampaolo Sica wrote: > Hi Klaus, > > in the iso13818-1 (you can find a copy at > http://neuron2.net/library/mpeg2/iso13818-1.pdf), in the section 2.4.2.2 > Input to the Transport Stream system target decoder, is explained how the > PCR is used to reconstruct the transport stream clock. > > Giampaolo > > -Original Message- > From: vdr-boun...@linuxtv.org [mailto:vdr-boun...@linuxtv.org] On Behalf Of > Klaus Schmidinger > Sent: venerdì 8 gennaio 2010 15.01 > To: vdr@linuxtv.org > Subject: Re: [vdr] PCR pid > > On 08.01.2010 12:19, Giampaolo Sica wrote: >> Hi Klaus, >> >> Thanks for your answer and sorry for replaying so late. >> >> Setting Ppid to 0x1FFF means disable it. The effect is that some mpeg2 >> players refuse to play vdr recordings. Can you name one that refuses to play such a recording? Kaffeine and gxine apparently have no problem. Klaus ___ vdr mailing list vdr@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr ___ vdr mailing list vdr@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr
Re: [vdr] PCR pid
On 08.01.2010 20:16, Giampaolo Sica wrote: > Hi Klaus, > > in the iso13818-1 (you can find a copy at > http://neuron2.net/library/mpeg2/iso13818-1.pdf), in the section 2.4.2.2 > Input to the Transport Stream system target decoder, is explained how the > PCR is used to reconstruct the transport stream clock. > > Giampaolo > > -Original Message- > From: vdr-boun...@linuxtv.org [mailto:vdr-boun...@linuxtv.org] On Behalf Of > Klaus Schmidinger > Sent: venerdì 8 gennaio 2010 15.01 > To: vdr@linuxtv.org > Subject: Re: [vdr] PCR pid > > On 08.01.2010 12:19, Giampaolo Sica wrote: >> Hi Klaus, >> >> Thanks for your answer and sorry for replaying so late. >> >> Setting Ppid to 0x1FFF means disable it. The effect is that some mpeg2 >> players refuse to play vdr recordings. Can you name one that refuses to play such a recording? Kaffeine and gxine apparently have no problem. Klaus ___ vdr mailing list vdr@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr
Re: [vdr] PCR pid
Hi Klaus, in the iso13818-1 (you can find a copy at http://neuron2.net/library/mpeg2/iso13818-1.pdf), in the section 2.4.2.2 Input to the Transport Stream system target decoder, is explained how the PCR is used to reconstruct the transport stream clock. Giampaolo -Original Message- From: vdr-boun...@linuxtv.org [mailto:vdr-boun...@linuxtv.org] On Behalf Of Klaus Schmidinger Sent: venerdì 8 gennaio 2010 15.01 To: vdr@linuxtv.org Subject: Re: [vdr] PCR pid On 08.01.2010 12:19, Giampaolo Sica wrote: > Hi Klaus, > > Thanks for your answer and sorry for replaying so late. > > Setting Ppid to 0x1FFF means disable it. The effect is that some mpeg2 > players refuse to play vdr recordings. > > I think that the PCR pid is more important in recordings than in live > viewing, because in live viewing the timing is implicit in the packet time > of arrival. When you have a file you lose that information because you try > to fill the playing buffer. > > What I said is anyway wrong, because PCR is part of the mpeg2 standard and > it have to be present in the stream. > > Maybe, the particular implementation of the mpeg2 decoder in the DVB FF card > derives its internal clock using the framerate of the mpeg2 stream, but it > is not standard. Can you point to some documentation that specifies how the PCR data is actually used during replay of a recording? I find it very hard to believe that this can actually be used, because you just can't syncronize a local clock to the PCR if the PCR packets don't arrive in real time. Klaus > -Original Message- > From: vdr-boun...@linuxtv.org [mailto:vdr-boun...@linuxtv.org] On Behalf Of > Klaus Schmidinger > Sent: sabato 5 dicembre 2009 12:27 > To: vdr@linuxtv.org > Subject: Re: [vdr] PCR pid > > On 26.11.2009 13:51, Giampaolo Sica wrote: >>> Maybe because you haven't applied it to your copy of version 1.7.10? ;-) >> :))) >> >>> In hindsight I'm not sure whether the change "Fixed writing the PCR pid >>> into the PMT in cPatPmtGenerator::GeneratePmt()" was a good idea, because >>> VDR doesn't record the PCR pid at all. >>> I tend to revert that change, because I don't think that >>> a separate PCR pid is necessary in a recording. AFAIK the >>> PCR pid is only for live viewing. >>> Klaus >> >> Yes, you're right if you are replaying recordings on a FF card, but: >> >> 1) Some players refuse to play TS streams without PCR information (screen >> remains black). >> 2) I'm porting VDR to IPBOX 9000HD (STi710x based STB... yes, I know there >> is enigma2, but I've been using vdr since 2000 and I love it) and the PCR >> pid is essential to have the timeline while watching recording, because > the >> ioctl DMX_GET_STC fails and the only way to you get time information is > from >> the video/audio decoder (VIDEO_GET_PTS/ AUDIO_GET_PTS). So, even if I > wrote >> a plugin for this device, I'd have to patch the base classes that is in >> contrast with the plugins philosophy > > Can you please try what happens if you set > > int Ppid = 0x1FFF; > > in cPatPmtGenerator::GeneratePmt()? > > As far as I understand the PCR (please correct me if I'm wrong), it only > has a meaning in live mode, where PCR packets arrive at precise points in > time and are used to syncronize the player's internal clock. > When replaying a recording, it is not defined when the PCR packets arrive > at the player, and thus they have no meaning. > > Klaus ___ vdr mailing list vdr@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr ___ vdr mailing list vdr@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr
Re: [vdr] PCR pid
On 08.01.2010 12:19, Giampaolo Sica wrote: > Hi Klaus, > > Thanks for your answer and sorry for replaying so late. > > Setting Ppid to 0x1FFF means disable it. The effect is that some mpeg2 > players refuse to play vdr recordings. > > I think that the PCR pid is more important in recordings than in live > viewing, because in live viewing the timing is implicit in the packet time > of arrival. When you have a file you lose that information because you try > to fill the playing buffer. > > What I said is anyway wrong, because PCR is part of the mpeg2 standard and > it have to be present in the stream. > > Maybe, the particular implementation of the mpeg2 decoder in the DVB FF card > derives its internal clock using the framerate of the mpeg2 stream, but it > is not standard. Can you point to some documentation that specifies how the PCR data is actually used during replay of a recording? I find it very hard to believe that this can actually be used, because you just can't syncronize a local clock to the PCR if the PCR packets don't arrive in real time. Klaus > -Original Message- > From: vdr-boun...@linuxtv.org [mailto:vdr-boun...@linuxtv.org] On Behalf Of > Klaus Schmidinger > Sent: sabato 5 dicembre 2009 12:27 > To: vdr@linuxtv.org > Subject: Re: [vdr] PCR pid > > On 26.11.2009 13:51, Giampaolo Sica wrote: >>> Maybe because you haven't applied it to your copy of version 1.7.10? ;-) >> :))) >> >>> In hindsight I'm not sure whether the change "Fixed writing the PCR pid >>> into the PMT in cPatPmtGenerator::GeneratePmt()" was a good idea, because >>> VDR doesn't record the PCR pid at all. >>> I tend to revert that change, because I don't think that >>> a separate PCR pid is necessary in a recording. AFAIK the >>> PCR pid is only for live viewing. >>> Klaus >> >> Yes, you're right if you are replaying recordings on a FF card, but: >> >> 1) Some players refuse to play TS streams without PCR information (screen >> remains black). >> 2) I'm porting VDR to IPBOX 9000HD (STi710x based STB... yes, I know there >> is enigma2, but I've been using vdr since 2000 and I love it) and the PCR >> pid is essential to have the timeline while watching recording, because > the >> ioctl DMX_GET_STC fails and the only way to you get time information is > from >> the video/audio decoder (VIDEO_GET_PTS/ AUDIO_GET_PTS). So, even if I > wrote >> a plugin for this device, I'd have to patch the base classes that is in >> contrast with the plugins philosophy > > Can you please try what happens if you set > > int Ppid = 0x1FFF; > > in cPatPmtGenerator::GeneratePmt()? > > As far as I understand the PCR (please correct me if I'm wrong), it only > has a meaning in live mode, where PCR packets arrive at precise points in > time and are used to syncronize the player's internal clock. > When replaying a recording, it is not defined when the PCR packets arrive > at the player, and thus they have no meaning. > > Klaus ___ vdr mailing list vdr@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr
Re: [vdr] PCR pid
Hi Klaus, Thanks for your answer and sorry for replaying so late. Setting Ppid to 0x1FFF means disable it. The effect is that some mpeg2 players refuse to play vdr recordings. I think that the PCR pid is more important in recordings than in live viewing, because in live viewing the timing is implicit in the packet time of arrival. When you have a file you lose that information because you try to fill the playing buffer. What I said is anyway wrong, because PCR is part of the mpeg2 standard and it have to be present in the stream. Maybe, the particular implementation of the mpeg2 decoder in the DVB FF card derives its internal clock using the framerate of the mpeg2 stream, but it is not standard. Giampaolo P.S. I liked very much the architecture of the 1.7.11 regarding the dvb FF support. I think that the more VDR will be hardware agnostic, the more its architecture will be well designed. -Original Message- From: vdr-boun...@linuxtv.org [mailto:vdr-boun...@linuxtv.org] On Behalf Of Klaus Schmidinger Sent: sabato 5 dicembre 2009 12:27 To: vdr@linuxtv.org Subject: Re: [vdr] PCR pid On 26.11.2009 13:51, Giampaolo Sica wrote: >> Maybe because you haven't applied it to your copy of version 1.7.10? ;-) > > :))) > >> In hindsight I'm not sure whether the change "Fixed writing the PCR pid >> into the PMT in cPatPmtGenerator::GeneratePmt()" was a good idea, because >> VDR doesn't record the PCR pid at all. > >> I tend to revert that change, because I don't think that >> a separate PCR pid is necessary in a recording. AFAIK the >> PCR pid is only for live viewing. > >> Klaus > > > Yes, you're right if you are replaying recordings on a FF card, but: > > 1) Some players refuse to play TS streams without PCR information (screen > remains black). > 2) I'm porting VDR to IPBOX 9000HD (STi710x based STB... yes, I know there > is enigma2, but I've been using vdr since 2000 and I love it) and the PCR > pid is essential to have the timeline while watching recording, because the > ioctl DMX_GET_STC fails and the only way to you get time information is from > the video/audio decoder (VIDEO_GET_PTS/ AUDIO_GET_PTS). So, even if I wrote > a plugin for this device, I'd have to patch the base classes that is in > contrast with the plugins philosophy Can you please try what happens if you set int Ppid = 0x1FFF; in cPatPmtGenerator::GeneratePmt()? As far as I understand the PCR (please correct me if I'm wrong), it only has a meaning in live mode, where PCR packets arrive at precise points in time and are used to syncronize the player's internal clock. When replaying a recording, it is not defined when the PCR packets arrive at the player, and thus they have no meaning. Klaus ___ vdr mailing list vdr@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr ___ vdr mailing list vdr@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr
Re: [vdr] PCR pid
On 26.11.2009 13:51, Giampaolo Sica wrote: >> Maybe because you haven't applied it to your copy of version 1.7.10? ;-) > > :))) > >> In hindsight I'm not sure whether the change "Fixed writing the PCR pid >> into the PMT in cPatPmtGenerator::GeneratePmt()" was a good idea, because >> VDR doesn't record the PCR pid at all. > >> I tend to revert that change, because I don't think that >> a separate PCR pid is necessary in a recording. AFAIK the >> PCR pid is only for live viewing. > >> Klaus > > > Yes, you're right if you are replaying recordings on a FF card, but: > > 1) Some players refuse to play TS streams without PCR information (screen > remains black). > 2) I'm porting VDR to IPBOX 9000HD (STi710x based STB... yes, I know there > is enigma2, but I've been using vdr since 2000 and I love it) and the PCR > pid is essential to have the timeline while watching recording, because the > ioctl DMX_GET_STC fails and the only way to you get time information is from > the video/audio decoder (VIDEO_GET_PTS/ AUDIO_GET_PTS). So, even if I wrote > a plugin for this device, I'd have to patch the base classes that is in > contrast with the plugins philosophy Can you please try what happens if you set int Ppid = 0x1FFF; in cPatPmtGenerator::GeneratePmt()? As far as I understand the PCR (please correct me if I'm wrong), it only has a meaning in live mode, where PCR packets arrive at precise points in time and are used to syncronize the player's internal clock. When replaying a recording, it is not defined when the PCR packets arrive at the player, and thus they have no meaning. Klaus ___ vdr mailing list vdr@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr
Re: [vdr] PCR pid
Giampaolo Sica wrote: P.S. If someone is interested in the porting to the ipbox, please let me know. If we are more than one I'll create a svn database on the internet. I would be highly interested to porting VDR to Kathrein UFS-910. Are they using a similar platform? thanks, István ___ vdr mailing list vdr@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr
Re: [vdr] PCR pid (was:[ANNOUNCE] VDR developer version 1.7.10)
>Maybe because you haven't applied it to your copy of version 1.7.10? ;-) :))) >In hindsight I'm not sure whether the change "Fixed writing the PCR pid >into the PMT in cPatPmtGenerator::GeneratePmt()" was a good idea, because >VDR doesn't record the PCR pid at all. >I tend to revert that change, because I don't think that >a separate PCR pid is necessary in a recording. AFAIK the >PCR pid is only for live viewing. > Klaus Yes, you're right if you are replaying recordings on a FF card, but: 1) Some players refuse to play TS streams without PCR information (screen remains black). 2) I'm porting VDR to IPBOX 9000HD (STi710x based STB... yes, I know there is enigma2, but I've been using vdr since 2000 and I love it) and the PCR pid is essential to have the timeline while watching recording, because the ioctl DMX_GET_STC fails and the only way to you get time information is from the video/audio decoder (VIDEO_GET_PTS/ AUDIO_GET_PTS). So, even if I wrote a plugin for this device, I'd have to patch the base classes that is in contrast with the plugins philosophy Giampaolo P.S. If someone is interested in the porting to the ipbox, please let me know. If we are more than one I'll create a svn database on the internet. ___ vdr mailing list vdr@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr
Re: [vdr] PCR pid (was:[ANNOUNCE] VDR developer version 1.7.10)
On 25.11.2009 14:24, Giampaolo Sica wrote: > Hello, > > I've patched VDR to record the PCR pid in the TS stream because both my tv > set (Samsung B650) and Win7 refuses to play TS streams without PCR (some > channel have PCR pid different from Video pid). > Why the fix in this version doesn't include the necessary changes in > receiver.* and recorder.* to record the PCR pid in case it differs from > vpid? Maybe because you haven't applied it to your copy of version 1.7.10? ;-) In hindsight I'm not sure whether the change "Fixed writing the PCR pid into the PMT in cPatPmtGenerator::GeneratePmt()" was a good idea, because VDR doesn't record the PCR pid at all. I tend to revert that change, because I don't think that a separate PCR pid is necessary in a recording. AFAIK the PCR pid is only for live viewing. Klaus ___ vdr mailing list vdr@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr
