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