Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.




5331 posts

Uber Geek

Trusted

#27357 23-Oct-2008 09:55
Send private message

I capture DVB-T TV3 broadcasts using gbpvr and a Hauppauge WinTV Nova 500 card (something like that). I use an external antenna pointed at Kau Kau

Recordings are fine played back on my Popcorn Hour (no ability yet to watch in real time but that's no bid geal) with little or no pixellation etc.

However if I try to post process the files to reduce their size I encounter AC-3 data errors. Viz.

Demux the video and audio and compress the video. Mux the original AC-3 stream back. Using txremuxer or mkvmerge I regularly encounter AC-3 frame errors and loss of sync in the output file. Since the original files playback fine, possibly the various players handle these errors okay but once you try to process the data, they surface to haunt you :(

Since it's random I can only guess it must be transmission artifacts but wonder what others are encountering (if at all). Makes it really hard to compress the video and get something useful at the output side.

Thanks

Larry




Staying in Wellington. Check out my AirBnB in the Wellington CBD.  https://www.airbnb.co.nz/rooms/32019730  Mention GZ to get a 10% discount

 

System One: Popcorn Hour A200,  PS3 SuperSlim, NPVR and Plex Server running on Gigabyte Brix (Windows 10 Pro), Sony BDP-S390 BD player, Pioneer AVR, Raspberry Pi running Kodi and Plex, Panasonic 60" 3D plasma, Google Chromecast

System Two: Popcorn Hour A200 ,  Oppo BDP-80 BluRay Player with hardware mode to be region free, Vivitek HD1080P 1080P DLP projector with 100" screen, Denon AVRS730H 7.2 Channel Dolby Atmos/DTS-X AV Receiver, Samsung 4K player, Google Chromecast, Odroid C2 running Kodi and Plex

 

 


Create new topic
1706 posts

Uber Geek

Trusted

  #173105 23-Oct-2008 16:26
Send private message

i found that with HD Olympics stuff off TVNZ, the moment you tried to re-encode files with errors, it'd just bail, this was using MediaCoder.

I guess we've got to wait for someone like VideoReDo to release their MPEG4 editor.



5331 posts

Uber Geek

Trusted

  #173172 23-Oct-2008 20:11
Send private message

I have the technology to make it work, if the AC-3 streams have no CRC errors in them. But they and are random. So far the only (cross my fingers!) process that seems repeatable is to break up the file into segments between ad breaks. Then compress each segment, mux it back with the audio and mux into a a MKV container. Then I can join the MKV files together. It's pretty laborious.

Annoyingly, if the audio has no CRS errors (and I have been lucky once or twice) the process is as simple as demux the video, compress it with x264, mux it back with the audio and then cut out the ads.

Still for me it's more an academic exercise than anything else since I felt it better to not compress the files and bought another 500G drive to store them!




Staying in Wellington. Check out my AirBnB in the Wellington CBD.  https://www.airbnb.co.nz/rooms/32019730  Mention GZ to get a 10% discount

 

System One: Popcorn Hour A200,  PS3 SuperSlim, NPVR and Plex Server running on Gigabyte Brix (Windows 10 Pro), Sony BDP-S390 BD player, Pioneer AVR, Raspberry Pi running Kodi and Plex, Panasonic 60" 3D plasma, Google Chromecast

System Two: Popcorn Hour A200 ,  Oppo BDP-80 BluRay Player with hardware mode to be region free, Vivitek HD1080P 1080P DLP projector with 100" screen, Denon AVRS730H 7.2 Channel Dolby Atmos/DTS-X AV Receiver, Samsung 4K player, Google Chromecast, Odroid C2 running Kodi and Plex

 

 


Create new topic




News »

Freeview On Demand app launches on Sony Android TVs
Posted 6-Aug-2020 13:35


UFB hits more than one million connections
Posted 6-Aug-2020 09:42


D-Link A/NZ extends COVR Wi-Fi EasyMesh System series with new three-pack
Posted 4-Aug-2020 15:01


New Zealand software Rfider tracks coffee from Colombia all the way to New Zealand businesses
Posted 3-Aug-2020 10:35


Logitech G launches Pro X Wireless gaming headset
Posted 3-Aug-2020 10:21


Sony Alpha 7S III provides supreme imaging performance
Posted 3-Aug-2020 10:11


Sony introduces first CFexpress Type A memory card
Posted 3-Aug-2020 10:05


Marsello acquires Goody consolidating online and in-store marketing position
Posted 30-Jul-2020 16:26


Fonterra first major customer for Microsoft's New Zealand datacentre
Posted 30-Jul-2020 08:07


Everything we learnt at the IBM Cloud Forum 2020
Posted 29-Jul-2020 14:45


Dropbox launches native HelloSign workflow and data residency in Australia
Posted 29-Jul-2020 12:48


Spark launches 5G in Palmerston North
Posted 29-Jul-2020 09:50


Lenovo brings speed and smarter features to new 5G mobile gaming phone
Posted 28-Jul-2020 22:00


Withings raises $60 million to enable bridge between patients and healthcare
Posted 28-Jul-2020 21:51


QNAP integrates Catalyst Cloud Object Storage into Hybrid Backup solution
Posted 28-Jul-2020 21:40



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.


Support Geekzone »

Our community of supporters help make Geekzone possible. Click the button below to join them.

Support Geezone on PressPatron



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.