[MEncoder-users] Repacking Without Transcoding

[Gordan Bobic]

Hi,

I'm trying to convert my video collection so it is suitable for use with 
all of my devices via Plex without realtime transcoding, which limits 
the format I can use to MP4 containers with H264 video and AAC audio.

Unfortunately, the DVDs I've been extracting over time (as the shelf 
space around the TV has been running out) are mostly in MKV containers 
with H264 video, which my Chromecasts won't play natively.

What I would ideally like to do is extract the H264 video data and 
repack it into an MP4 container without transcoding (I don't want to 
lose any video quality and transcoding is CPU expensive while just 
re-containering should be much cheaper).

Is there a way to do that?

Also, in many cases, although the video streams I have been encoding are 
H264, I have mostly been using MP3 audio rather than AAC, so I will need 
to transcode the audio. What is the best way of doing that while 
minimizing the risk of upsetting A/V synchronisation?

Many thanks in advance.

Gordan