Problem burning M4V to Blu-ray...

So i'm trying to tackle the Star Trek Bonus Disc...

The iTunes file has a frame-rate of 23.976. I use mkvtoolnix to change it to an mkv file, where the frame-rate remains 23.976.

When I try to author and burn to disc using MultiavcHD (which uses tsmuxer), TSmuxer says "Frame Rate: not found" even though Multiavchd still shows 23.976. The resulting file shows a frame-rate of 25fps.

Any ideas? Is there a problem with the header? Is there any way to change that without completely re-encoding?

Here's the info on the initial file:

General
Complete name : enhanced_commentary.m4v
Format : MPEG-4
Codec ID : M4V
File size : 4.83 GiB
Duration : 2h 42mn
Overall bit rate : 4 247 Kbps
Encoded date : UTC 2013-08-18 23:12:27
Tagged date : UTC 2013-08-18 23:13:35

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L3.1
Format settings, CABAC : No
Format settings, ReFrames : 2 frames
Format settings, GOP : M=2, N=80
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 2h 42mn
Bit rate : 4 092 Kbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 23.976 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.185
Stream size : 4.65 GiB (96%)
Language : English
Encoded date : UTC 2013-08-18 23:12:20
Tagged date : UTC 2013-08-18 23:13:35
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709

Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : 40
Duration : 2h 42mn
Source duration : 2h 42mn
Bit rate mode : Constant
Bit rate : 149 Kbps
Nominal bit rate : 160 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Compression mode : Lossy
Delay relative to video : 42ms
Stream size : 173 MiB (3%)
Source stream size : 173 MiB (3%)
Language : English
Encoded date : UTC 2013-08-18 23:12:21
Tagged date : UTC 2013-08-18 23:13:35

Have you tried demuxing the iTunes file to MKV with Eac3to?  I don't know if it will work because I've never tried demuxing an M4V, but it's worth a shot.

DEmuxing isn't the problem. It's the muxing that's the problem. For whatever reason, TSmuxer won't recognize the FPS and I have no idea why. :(

I realize that, but I thought that if the header given to the MKV by MKVToolnix were the problem, Eac3to might do a better job.

Chewtobacca said:

I realize that, but I thought that if the header given to the MKV by MKVToolnix were the problem, Eac3to might do a better job.