[mythtv-users] Lossless transcode for MPEG4 recordings?

[Richard Shaw]

Years ago I used to do lossless transcoding on all my ATSC recordings. They
took up less space when $/GB was higher...

Fast-forward to today. I have both ATSC and CC HDHR tuners and Plex on all
my TVs that don't connect directly to a FE.

Most things work OK but Plex has problems with the audio getting massively
out of sync on some channels. There are a few recordings I saved and I used
Avidemux to convert the container to MKV but left the video and audio
streams alone. These playback just fine in Plex.

So the questions are...

1. Is there a lossless transcode equivalent in Mythtv?
2. Can I convert the recordings to MKV containers?

I found this thread but I'm not worried about cutpoints, just a fix to the
audio sync...

http://lists.mythtv.org/pipermail/mythtv-users/2017-June/391873.html

Per this:

https://www.mythtv.org/wiki/Lossless_Cut

It looks like the answer to #2 is yes, but it doesn't look like the code
has been touched since 2013...

Is there an "official" way to handle this within MythTV?

Thanks,
Richard
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