M2TS to MXF Conversion using FFMPEG Batch AV Converter issues

Hi all.

I used to use TMPGEnc Smart Render 4 to convert my M2TS files (joined using txMuxer) to MXF files. I use Adobe Premiere to do Multicam Editing and MXF files give me the best performance.

When I upgraded to Windows 11, Smart Render wouldn't even load. I tried countless uninstalls and installs, running as administrator and compatibility mode and nothing worked. So I decided to go the freeware route.

I tried XMedia Recode but the audio would not pass through to the mxf files.I even tried the latest version but same issue persists. After much experimentation, I decided to try other freeware gui based ffmpeg software. I settled on FFMPEG Batch AV Converter. I really like it!

However, I am still having issues. The conversion (Rewrap) to MXF works, but when I import the files into Premiere, they play back in slow motion (for some reason, FFMPEG Batch AV Converter changes the framerate) AND play back stutters, so much so that I can't do a proper edit. The slow motion did NOT happen when I first tried FFMPEG Batch AV Converter. BTW, when FFMPEG Batch AV Converter did NOT change the framerate, the video still stuttered.

Following are the Mediainfo files for both the Smart Render 4 MXF followed by the FFMPEG Batch AV Converter MXF files.

Any assistance is greatly appreciated:


General
Complete name : O:\Camera Footage 2025\20250622 - Pastor Emmanuel Simmons - The End Times\MXF Conversions\Gary.mxf
Format : MXF
Format version : 1.3
Format profile : OP-1a
Format settings : Closed / Complete
File size : 10.2 GiB
Duration : 1 h 4 min
Overall bit rate mode : Variable
Overall bit rate : 22.7 Mb/s
Frame rate : 29.970 FPS
Encoded date : 2026-02-14 20:59:34.000
Writing application : Pegasys Inc. TMPGEnc MPEG Smart Renderer 6.1.2.20.1

Video
ID : 2
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4
Format settings : CABAC / 2 Ref Frames
Format settings, CABAC : Yes
Format settings, Reference frames : 2 frames
Format settings, GOP : M=2, N=15
Format settings, wrapping mode : Frame
Codec ID : 0D01030102106001-0401020201314001
Duration : 1 h 4 min
Bit rate mode : Variable
Bit rate : 21.2 Mb/s
Maximum bit rate : 22.0 Mb/s
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate : 29.970 (30000/1001) FPS
Standard : Component
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Interlaced
Scan type, store method : Separated fields
Scan order : Top Field First
Bits/(Pixel*Frame) : 0.341
Stream size : 9.54 GiB (93%)
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Delay_SDTI : 0

Audio
ID : 3
Format : PCM
Format settings : Little
Format settings, wrapping mode : Frame (AES)
Codec ID : 0D01030102060300-040202017F000000
Duration : 1 h 4 min
Bit rate mode : Constant
Bit rate : 1 536 kb/s
Channel(s) : 2 channels
Sampling rate : 48.0 kHz
Frame rate : 29.970 FPS (1601.6 SPF)
Bit depth : 16 bits
Stream size : 709 MiB (7%)
Delay_SDTI : 0
Locked : Yes

Other #1
ID : 1-Material
Type : Time code
Format : MXF TC
Frame rate : 29.970 (30000/1001) FPS
Time code of first frame : 00:00:00;00
Time code of last frame : 01:04:29;10
Time code settings : Material Package
Time code, stripped : Yes

Other #2
ID : 1-Source
Type : Time code
Format : MXF TC
Frame rate : 29.970 (30000/1001) FPS
Time code of first frame : 00:00:00;00
Time code of last frame : 01:04:29;10
Time code settings : Source Package
Time code, stripped : Yes

Other #3
Type : Time code
Format : SMPTE TC
Muxing mode : SDTI
Frame rate : 29.970 (30000/1001) FPS
Time code of first frame : 00:00:00;00




General
Complete name : O:\Camera Footage 2025\20250713 - Pastor Emmanuel Simmons - Healing Comes Through the Blood\Muxed Files\FFBatch\Gary.mxf
Format : MXF
Format version : 1.3
Format profile : OP-1a
Format settings : Open / Incomplete
File size : 2.17 GiB
Overall bit rate mode : Variable
Frame rate : 14.985 FPS
Encoded date : 0-00-00 00:00:00.000
Writing application : FFmpeg OP1a Muxer 62.12.100.0.0
Writing library : Lavf (mingw32) 62.12.100.0.0
IsTruncated : Yes

Video
ID : 2
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4
Format settings : CABAC / 2 Ref Frames
Format settings, CABAC : Yes
Format settings, Reference frames : 2 frames
Format settings, GOP : M=2, N=15
Format settings, wrapping mode : Frame
Codec ID : 0D01030102106001-0401020201314001
Bit rate mode : Variable
Maximum bit rate : 22.0 Mb/s
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate : 14.985 (15000/1001) FPS
Original frame rate : 29.970 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Interlaced
Scan type, store method : Separated fields
Scan order : Top Field First
Delay_SDTI : 0
IrisFNumber : 3.100000

Audio
ID : 3
Format : PCM
Format settings : Little
Format settings, wrapping mode : Frame (AES)
Codec ID : 0D01030102060300
Bit rate mode : Constant
Bit rate : 1 536 kb/s
Channel(s) : 2 channels
Sampling rate : 48.0 kHz
Bit depth : 16 bits
Delay_SDTI : 0
Locked : Yes

Other #1
ID : 1-Material
Type : Time code
Format : MXF TC
Frame rate : 29.970 (30000/1001) FPS
Time code of first frame : 00:00:00:00
Time code settings : Material Package
Time code, stripped : Yes

Other #2
ID : 1-Source
Type : Time code
Format : MXF TC
Frame rate : 29.970 (30000/1001) FPS
Time code of first frame : 00:00:00:00
Time code settings : Source Package
Time code, stripped : Yes

Other #3
Type : Time code
Format : SMPTE TC
Muxing mode : SDTI
Frame rate : 29.970 (30000/1001) FPS
Time code of first frame : 00:00:00:00

The second video is not only remuxed, but is reencoded.
An unnecessary step. The MXF container supports avc video and PCM audio, so there is no need to reencode.
If your source M2TS video contains audio tracks other than PCM audio, all you need to do is convert those audio tracks to PCM and then multiplex them with the AVC video track into an MXF file.

You can do this with clever FFmpeg-GUI.
Load your m2ts video.
If it contains already avc/pcm then click multiplex, set mxf as container, click multiplex. Done.
If the audio is other than pcm, click convert audiostream, convert the audiostream/s to pcm, click multiplex, set the streams on the left, set mxf as container, click multiplex. Done.

@ ProWo
Thank you. I will try this.

Originally Posted by Brainiac

I used to use TMPGEnc Smart Render 4 to convert my M2TS files (joined using txMuxer) to MXF files.
When I upgraded to Windows 11, Smart Render wouldn't even load. I tried countless uninstalls and installs, running as administrator and compatibility mode and nothing worked.

The problem is the corel driver.
Unistall TMPGEnc Smart Render 4.

Google for

tmpgenc smart renderer 4 corel driver install issues windows 11

Read the AI answer carefully.

1) Disable Windows 11 Kernel Isolation (Core Isolation/Memory Integrity)
2) Restart your computer
3) Reinstall TMPGEnc Smart Render 4
4) Check if it works
3) If not, start it in compatibility mode (for Windows 7)

@ProWo
I tried what you suggested in post #4 but TMPGENC Smart Render 4 still won't open. I'm just going to move on from it. When I can, I'll upgrade to version 6. The trial works perfectly.

I also tried Clever FFMPEG_GUI. It did produce the mfx file, but the file is still jerky when I import and play it in Adobe Premiere.

Thanks for your help with all of this.

Originally Posted by Brainiac

I also tried Clever FFMPEG_GUI. It did produce the mfx file, but the file is still jerky when I import and play it in Adobe Premiere.

Then was jerky the m2ts source file too.
clever with ffmpegs MXF muxer simply multiplexes the streams; they are not altered in any way.
The only thing to keep in mind when using the MXF muxer is that the GOPs shouldn't be too large (max 128 frames).

The original files are not jerky. TMPGENC Smart Render 4 nor Smart Render 6 trial version didn't produce any jerky files.
Magix Vegas reencodes the video and takes a long time to do the conversion.