No video/audio detected (7 Viewers)

[Stepko]

On my boxes I can reproduce it this way (i´ve only one analog card installed):

- Install latest TVServer
- Setup TV-Card and scan for channels
- Set recordingdir to d:\recordings
- Set timeshiftdir to d:\recordings\timeshift
- In TVServer-configuration goto "Manual Control"
- Select any channel
- Press "Start Timeshift"

Nothing happens for about 10 seconds, then the message "No Audio/Video detected" is shown.

Using this folderconfiguration the error occurs everytime. Perhaps there is more than one reason for that error as some people experience it only randomly.

Right now I´m at work, so I cannot post my logfiles.

 

[Stepko]

I have to correct my last post. Since yesterday the error occurs on my system randomly, too.

But now I know that the errormessage is kind of misleading. Like MadDuke already said the problem seems to be the timeshiftfile "live*-0.ts.tsbuffer". Sometimes this file isn´t closed properly. The next time TV is activated the TVServer tries to create the new timeshiftfile which isn´t possible because of "live*-0.ts.tsbuffer" still being opened. The function WaitForTimeShiftFile (Timeshifter.cs, line 248) waits for the timeshiftfile to become greater than 0,5MB. But this file is never created, so it won´t ever get that big and after a timeout the well known errormessage appears.
So the big question is: Why is the "live*-0.ts.tsbuffer" still opened when TV is deactivated?
I hope one of the devs can answer me some questions, then I will have another look at the sources.

- For writing the timeshift file a com-object is used that implements "IMPRecord". Where can I find the sources? It is in "Filters\sources\MPWriter"? When I try to compile that, I get an error "cannot find streams.h". Is "streams.h" part of the Platform SDK? (I think I need to install that)

- What is the purpose of the "live*-0.ts.tsbuffer"-file? The video/audio data is stored in "live*-0.ts.tsbuffer1.ts"? (Btw, why is it called .tsbuffer1.ts?). Why and where is the "live*-0.ts.tsbuffer"-file created?


Stepko

 

[dsundelin]

Any news on this problem? I´ve got it too but for me its so bad that i cant watch any channels at all. Tried to move the folders without any difference.

 

[seco]

Lol this is ridiculous. I was watching live TV at the same time when another channel was recording and the video&audio stopped suddenly, after that "No audio/video detected".

I deleted all TS buffer files that I could but some of them were use by "some" application.

Then everything worked fine a while but AGAIN THE SAME PROBLEM. After that I couldn't delete any of the buffer files because all of them were in use (according Windows). Then the MP crashed my whole computer.

For fuck's sake, it can't be that hard. I would pay a reasonable price for a working, stable DVB software but it is really sad that there is none free or non-free available.

 

[Stepko]

This is really hard to find, but I´ll give it a try:
I changed some things in the MPFileWriter, that writes the timeshift file. This version is working on my box, but I had not much time to test it. As this error only occurs randomly, I´m not sure if its really fixed.

So people, please try this file!

If its working on your PC, please post it here. If its not working, post it, too .

Some things:
- Make a backup copy of your MPFileWriter.ax beforehand!
- Extract the new file to your TVServer-dir
- Perhaps you need to stop the TVServer-service to replace the file.
- You must restart the TVServer-service afterwards

The new file is build as a debug version. It may run much slower that the original one. It is not intendet to be used on a production system. For testing purposes only! If the errormessage still apears, please post your "MPFileWriter.Log" (this version prints out more debug infos).

Stepko

EDIT:
Do not use this old version of MPFileWriter any longer. New version available here.

 

[rtv]

I only get this on DVB-S if an svn update cannot run smoothly. E.g. if I forget to check whether the service really stopped (taskmgr). In most of these cases some filters cannot be registered. Most likely unregistering/registering new tswriter has failed.

To be save from that:
- always make sure tvservice.exe doesn't show up on taskmgr anymore.
- reboot after uninstalling TVE3 and TVPlugin
- install and configure new build
- reboot
- use TV again.

 

[Damandan]

So I think I may have the same problem, but only on three specific channels. I tried the new MPFileWriter but did not find MPFileWriter.Log. However tv.log seems to be more detailed now??? Hope you learn something from these logs.

What I did to provide these logs is the following:
- Start TV-server with the new file.
- Go to the channel overview and click on preview of RTL 5.
- after a while the "no video/audio" window pops up.
- A few seconds later I click on preview of RTL 4.
- All works well.

So you should see in the logs in order of appearance:
1. a sequence for a non-working channel.
2. a sequence for a working channel.

Let's see to what this leads.

PS. Tested this with the latest svn of TVE.

Update: Well aparently my problem was not MP related, but a problem at the cable company. Problem solved. But maybe the logs are still of some use for someone.

 

[Stepko]

rtv: Thanks for the hint. Tried the steps but without any luck - problem still there (with original MPFileWriter). As far as I can remember the errormessage also appeared after my first install (which ran smoothly) on a clean XP-Pro.

I built a new patched version of the MPFileWriter. Please use this one, it is build without all the debug-stuff and works pretty good on my system. There were 9 downloads but only one reply..?!?
I think the problem is some kind of a timing problem between MP, DirectShow and MPFileWriter. But thats just a guess.

Btw: As I learned today MPFileWriter is only involved if you use an analog card. If you watch TV using a DVB-card, TSWriter is used for timeshifting instead of MPFileWriter. So this patch won´t do anything on systems with a DVB-card.

 

[illStyle]

Any news?


Regards,
Simon

 

[Fredd_1001]

Hi guy's , I have the same problem.....
I tried some debugging (alltough I'm a newbie) and found the following:

My system config : Clean WinXP -SP2 install with latest TVE3 snapshot and SVN builds. With a FloppyDTV-S2 card, a magic CAM, and a Canaal+ card.
The problem only seems to occur when I tune to one of the channels belonging to the Canaal+ package, BUT(!) only with the CAM inserted and the error messages depends on the channel being scrambeled or not.
If I tune to a free to air channel with the CAM inserted I get No video/Audio detected. On a scrambled channel TVserver reports channel is scrambeled (offcoarse!! that's why I paid for the canaal+ card ;-) )
As soon as I take out de CAM the free to air channel works fine (manual timeshift from within TVserver).
When I try a (free to air) channel from another provider then everything works fine, it doesn't matter if the CAM is in or out then.
So I had a look to the TV logfile, and I allso have the same problem: 2007-11-04 20:57:23.500000 [9]: card: timeshifting fileSize:0 TIMEOUT.
So maybe this can help you guys in finding the cause for the error.
I will allso have a deeper look into this (as far as is possible with my knowledge), and if I can help in any way with testing, please let me know!