TV Server how to select video codec (1 Viewer)

[chenks]

afaik the server records as it receives the broadcast.

 

[vibez]

Thanks for that, it doesn't quite explain why I get a good live tv picture but a poor recording

 

[chenks]

could it be that the constant HDD access writing the recording is causing an IRQ clash with the tv card and thus you are getting stuttering and blocking??

i've seen it hapen before.

 

[vibez]

That is certainly worth investigating. Has there been anyone who has fixed such an issue? I'm a little lost as to where to start debugging this.

 

[chenks]

if it's a PCI card.. try moving it to another slot.

 

[infinite.loop]

anyone of you who has problems with recorded mpg's tried to:

1. demultiplex the recorded file with i.e. pvastrumeto (which also fixes some things)
2. eventually cut the commercials out with cuttermaran
3. multiplex the cutted files again (can be done inside of cuttermaran)
4. play the file again.

you should be aware that the stream you get from dvb is not the same as you get from a DVD, even if its using the same codec (mpeg2).
the stream you get from dvb has many error-correction informations included.
with tools like pvastrumento you can fix minor issues in an recorded mpg file and reduce the filesize a bit because these error-correction informations are removed.

I am not sure, but i think that other applications maybe are able to do that on the fly during recording. <<<---- but thats only a guess!!!!

 

[AxelSt]

I thought maybe the hint fits here: I have made VERY good experience with the freeware StaxRip (e.g. http://www.planetdvb.net/staxrip ) which combines lotsa open source tools under a nice gui. For me it is particularly useful for encoding DVB streams into other formats (currently I use thze mp4 container and h264/AAC codecs). The special thing with StaxRip for me is, that it corrects errors in dvb-recordings automatically. For instance, when the weather-conditions are very bad (lightning or heavy rain), my DVB-S sometimes have nearly unrecognizable errors (some video-frames are corrupt). When encoding these files to any other format with tools like VirtualDub or the like, I realized that the accumulation of corrupt video frames may lead to audio/video desync in long files (as the audio frames may not be corrupt). StaxRip includes a test run (like with pvastrumento) which cuts out the audio-frames when the corresponding video-frames are corrupt. You don't see/hear the missing frames in the resulting encoded video, but there is no desync at all. In adition, StaxRip "eats" nearly everything (also vob-files from dvds). StaxRip has replaced all my seperate tools (dvd2avi/virtualDub/vfapiconv/headac3he etc). I can only recomment it.

Axel

 

[vibez]

Thanks guys, some great suggestions