Hello all,
I'm a video editor who has been provided with a couple of .m2ts files that I need to convert into a different standard, specifically ProRes. However, I'm having initial issues getting these .m2ts files to import into Premiere with audio. These .m2ts files each contain one video track and two audio tracks, and can play just fine in programs such as VLC. However, upon importing any of the files into Premiere Pro 2019 (Version 13.1.2, Build 9), I notice a few odd behaviors:
- First, no realtime caching of the media file's audio occurs. Usually when I import files by dragging them into the Project tab, I'll see a progress bar on the lower righthand corner that shows the media caching. This does not appear.
- Second, when I drag the imported .m2ts file into the Premiere timeline, only the video track shows up on the timeline. No audio tracks appear at all. Checking the "Properties" for the individual .m2ts files only shows video information, and no audio info. See the screenshot attached for what this looks like on the timeline.
- I tried importing via the Media Browser and was unable to get the folder to open. I copied the file to a different folder on my drive that Media Browser could display and imported that way. The same behavior occurred.
I've searched the forums and Youtube for help regarding this and have tried multiple recommended solutions. As of yet, none of them have worked. These attempts include:
- Clearing out the Media Cache database of all cached files (available at C:\Users\ASOT1\AppData\Roaming\Adobe\Common)
- Closing Premiere, renaming the Common folder in the Media Cache database to something else, then relaunching Premiere and importing the file again
- Starting a new project in Premiere Pro and importing the file
- Opening an old project in Premiere Pro and importing the file to verify if the audio track imports correctly...it does not
- Checking to make sure the "A1" button is enabled in the timeline. It appears the A1 button does not appear on the timeline unless Premiere recognizes imported clips as having audio. As a result the A1 button does not appear when I create a new sequence using these imported files. I've tried importing the files into older timelines that did have the A1 button present and enabled. Unfortunately this has not resolved the issue.
- Renaming the .m2ts files to other formats (such as .mts, .avi, etc) and attempting the import again. I tried renaming to both .mts and .avi, the .mts still didn't allow audio import and renaming to .avi produces a "File corrupted" error on import, which I expected
- Converting the .m2ts file to a .ts format using a program such as TsMuxer. The hope was to produce a lossless conversion to a new .ts file that would then import correctly into Premiere. These new .ts files still import without any associated audio tracks.
My current strategy is to attempt a lossless conversion using Handbrake, importing that new lossless file into Premiere and rendering out to a ProRes intermediate. However, as I'm unfamiliar with the Handbrake software I do not have faith that I am producing a true lossless conversion, and thus I'm worried I may be losing quality.
Are there any further steps I can take? I would prefer to operate entirely inside Premiere but if Premiere cannot convert these files as they are, I may need to look at other solutions. Any assistancer would be greatly appreciated.
Operating System Info:
OS: Microsoft Windows 1- Home
OS Version: 10.0.18362 Build 18362
System Type: x64-based PC
Processor: Intel(R) Core(TM_ i7-5820K CPU @ 3.30 GHz
GPU: GeForce GTX 1070
Software Info:
Premiere Pro Version: Premiere Pro 2019, Version 13.1.2, Build 9
Media Information for the .m2ts Files (pulled using MediaInfo):
General
Format: BDAV
Video Track #1
Video Format: AVC
Video Format Profile: High@L4.1
Video Bit rate mode: Variable
Video Bit rate: 30.1 Mb/s
Video Resolution: 1080p
Video Frame rate: 23.976 FPS
Video Color space: YUV
Video Bit depth: 8 bits
Audio Track #1
Format : AC-3
Format/Info : Audio Coding 3
Commercial name : Dolby Digital
Muxing mode : Stream extension
Codec ID : 131
Bit rate mode : Variable
Bit rate : 448 kb/s
Maximum bit rate : 2 880 kb/s
Channel(s) : 6 channels
Channel layout : L R C LFE Ls Rs
Sampling rate : 48.0 kHz
Frame rate : 31.250 FPS (1536 SPF)
Compression mode : Lossy
Stream size : 76.7 MiB (1%)
Service kind : Complete Main
Audio Track #2
Format : AC-3
Format/Info : Audio Coding 3
Commercial name : Dolby Digital
Muxing mode : Stream extension
Codec ID : 131
Bit rate mode : Variable
Bit rate : 192 kb/s
Maximum bit rate : 1 653 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 48.0 kHz
Frame rate : 31.250 FPS (1536 SPF)
Compression mode : Lossy
Stream size : 32.9 MiB (1%)
Service kind : Complete Main
Media Information displayed for each of the .m2ts files inside Premiere (pulled by right-clicking on the imported media in Premiere 2019 and selecting Properties):
Type: MPEG Movie
File Size: 5.35 GB
Image Size: 1920 x 1080
Frame Rate: 23.976
Pixel Aspect Ratio: 1.0
Alpha: None
Video Codec Type: AVCHD H.264 4:2:0
(notice there is no audio information displayed)
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