Video Split and Merge without re-encoding

Forums › Digital Imaging › Video Split and Merge without re-encoding

lyonrouge

1990 posts

Uber Geek
+1 received by user: 20

Trusted

Lifetime subscriber

Topic # 128797 23-Aug-2013 15:49

I've tried a couple of the OotB solutions for this from MS and Apple. I find the encoding quailty is poor and the audio commonly out of sync. Can anyone recommend a tool that can split and join h.264 / AAC video without reencoding?

1080p

1332 posts

Uber Geek
+1 received by user: 152
Inactive user

Reply # 883497 23-Aug-2013 16:21

mkvtoolnix.

Behodar

6401 posts

Uber Geek
+1 received by user: 1133

Trusted

Lifetime subscriber

Reply # 883500 23-Aug-2013 16:27

And if MKV isn't suitable then Subler can take that resulting MKV file and losslessly remux to .m4v.

lyonrouge

1990 posts

Uber Geek
+1 received by user: 20

Trusted

Lifetime subscriber

Reply # 883785 24-Aug-2013 09:56

Thanks, I'm not sure if it was the MKV or M4V conversion step, but like other mechanisms I tried, this also had a audio sync mismatch.

jonherries

1037 posts

Uber Geek
+1 received by user: 77

Subscriber

Reply # 883791 24-Aug-2013 10:30

Eyetv does a pretty good job on a mac.

Jon

1080p

1332 posts

Uber Geek
+1 received by user: 152
Inactive user

Reply # 883792 24-Aug-2013 10:31

lyonrouge: Thanks, I'm not sure if it was the MKV or M4V conversion step, but like other mechanisms I tried, this also had a audio sync mismatch.

If you're having audio sync issues with multiple different pieces of software then there is likely a problem/quirk with your file. mkvmerge is easily able to resync the audio at mux time.

lyonrouge

1990 posts

Uber Geek
+1 received by user: 20

Trusted

Lifetime subscriber

Reply # 883801 24-Aug-2013 11:12

My suspicion is subler, due to how long it took to process the mkv file created by mkvmerge. I'm unable to access the resulting mkv file as non of my systems (Snow Leopard, Win 7 nor OpenSUSE 12.2) will play it.

Behodar

6401 posts

Uber Geek
+1 received by user: 1133

Trusted

Lifetime subscriber

Reply # 883807 24-Aug-2013 11:38

mkv or m4v? If your video is more than 4 GB then you need to turn on "64-bit chunk offset" when saving out of Subler (this isn't enabled by default).

lyonrouge

1990 posts

Uber Geek
+1 received by user: 20

Trusted

Lifetime subscriber

Reply # 883885 24-Aug-2013 14:55

The final result was m4v. I'm installing an Ubuntu 12.04 desktop to hopefully overcome codec dependancies, that was I should be able to see if the mkv was OK.

1080p

1332 posts

Uber Geek
+1 received by user: 152
Inactive user

Reply # 883892 24-Aug-2013 15:18

lyonrouge: My suspicion is subler, due to how long it took to process the mkv file created by mkvmerge. I'm unable to access the resulting mkv file as non of my systems (Snow Leopard, Win 7 nor OpenSUSE 12.2) will play it.

Installing a Matroska splitter on any of those systems will enable Matroska file playback. The fastest method would be installing a copy of VLC which has all necessary filters installed internally.

lyonrouge

1990 posts

Uber Geek
+1 received by user: 20

Trusted

Lifetime subscriber

Reply # 883900 24-Aug-2013 15:31

ah, of course, why didn't I think of that, doh!