Problem authoring .m4v file using TSMuxer/MultiavcHD

[digitalfreaknyc]

I have an .m4v file that I'm constantly having a problem with burning using MultAVChd.
It 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

But once it hits tsmuxer:

[noemi7]

If it is iTune video stream then no wonder: almost all lack of proper video header, and there is no info on frame rate. TSMuxer as well any BR authoring program will fail with such stream.

[digitalfreaknyc]

If it is iTune video stream then no wonder: almost all lack of proper video header, and there is no info on frame rate. TSMuxer as well any BR authoring program will fail with such stream.

So there's no way to fix it without re-authoring?

[noemi7]

I didn't find any program that really correct such problem. Suggested were ffmpeg, TSMuxer, and VideoReDo. VideoReDo author wrote me that he is going to make a tool for h264 header correction as there are more and more such faulty streams.

If you want to author the stream, you would need to re-convert it (not re-author). This of course will degrade its quality. I keep mine until a tool is available.

[digitalfreaknyc]

Thanks for the response. I tried those as well as several others. We'll see what happens I guess.