Convert mkv to m2ts without losing sound and picture quality

[certalic]

Hello, I would need a little help. I need a Video conveter that converts Mkv Dolby Atmos (7.1) to M2TS Dolby Atmos (7.1). Everything I’ve tried so far I’ve come up with a maximum of 5.1 sound. I have already tried about 10 different converters but there was no success. That is, I need a conveter that will not monitor the sound and picture quality and the extension becomes M2TS

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thanks silvo

[Selur]

Have you tried:
a. tsMuxeR ?
b. ffmpeg ('-c copy')?
what have you tried?

[certalic]

thanks i tried and there was no success

[ProWo]

Can be done by clever FFmpeg-GUI (remux only, no conversion).

Here the info from a remuxed mkv to m2ts:


[Attachment 60538 - Click to enlarge]

[certalic]

thanks Pro Wo I tried 30x but I didn't succeed maybe it's too hard for me

[ProWo]

follow these steps:


[Attachment 60549 - Click to enlarge]

[certalic]

thanks for the sent instructions i tried and i succeeded but i didn't get 7.1 sound only 2.0 stereo

[Ennio]

I wonder whether there could be something odd or non-standard about your source video.
Maybe you can provide a sample? You can cut out a small part of a mkv with mkvtoolnix, leaving audio and video unchanged.

[certalic]

hello thanks for the help ... I tried many times with one file and that is Leaf Dolby Atmos® you can find it on the link https://thedigitaltheater.com/dolby-trailers/ I don't understand at all thanks again for the help I have about 100 giga mkv Dolby Atmos movie trailers

[Ennio]

I downloaded the "Leaf (Lossless-ATMOS)" mkv from your link. Should you import this file in tsMuxer, you'll have a "unsupported format" warning thrown at you, leaving the videostream only shown up in the tracklist. The reason for this is that tsMuxer expects a TrueHD stream (with or without Atmos, btw) that meets BD specifications. Which dictate an embedded legacy AC-3 track in case of TrueHD. The mkv container simply isn't capable of this.
What you can do is import the mkv in UsEac3To and set the audiotrack output as "thd+ac3". This will result in eac3to generating a 5.1 AC-3 track (out of the TrueHD audio) and it will embed this in the - unaltered - TrueHD + Atmos track (note that this embedded AC-3 track is independent).
The resulting "thd+ac3" file can simply be added with tsMuxer. It will be approved and BD or M2TS muxing will now go properly.

[ProWo]

hello thanks for the help ... I tried many times with one file and that is Leaf Dolby Atmos® you can find it on the link https://thedigitaltheater.com/dolby-trailers/ I don't understand at all thanks again for the help I have about 100 giga mkv Dolby Atmos movie trailers

A simple remux with clever FFmpeg-GUI does the job.

[Ennio]

A simple remux with clever FFmpeg-GUI does the job.

Yep, works like a charm also. I never knew that clever FFmpeg could mux TrueHD without an embedded AC3 track into m2ts. Nice!
Never too old to learn...

[certalic]

thanks guys now it's just up to me to do it the way it should be if you succeed you have to do it too ... maybe it's my installation of the program or something else.
Thank you so much for helping SILVO

[Ennio]

Well, both tsMuxer and clever FFmpeg GUI don't need installation.

Maybe you want to be sure to download the latest versions, including ffmpeg itself (extract in same folder where "clever FFmpeg GUI.exe" is).

As for tsMuxer, I tend to use the latest nightly build.

Good luck.

[p1co]

follow these steps:


[Attachment 60549 - Click to enlarge]

Didn't work for me either. No sound on the resulting file

[Ennio]

"No sound" meaning that during playback you have no sound or that the m2ts file shows no audio in MediaInfo?
I can imagine the first is the case. Did you try the workflow I described in post# 10?

[p1co]

I had used the instructions in #6. Subsequently following other forum I did this morning same as your post #10. Did it twice, the first 4k file seems to be working fine. The second 4k hdr it does have the atmos soundtrack but it's not in sync with the picture .

[p1co]

that the m2ts file shows no audio in MediaInfo?
?

have deleted the file because didn't work

[Ennio]

The second 4k hdr it does have the atmos soundtrack but it's not in sync with the picture .

It's possible that there is an audio delay in your source mkv. You can check with MediaInfo. If so, you have to type that value in the Delay window of the audiotrack in tsMuxer.

[p1co]

It's possible that there is an audio delay in your source mkv. You can check with MediaInfo.

How to check?

The resulting m2ts file video is jerky as well

[Ennio]

It's possible that there is an audio delay in your source mkv. You can check with MediaInfo.

How to check?

Like I said, with MediaInfo. Install it (or use the portable) and load your videofile with it. It will show you all contents and technical detail about the video, audio, subtitles, etc. If there is a sound delay it will tell you at the audiotracks section.

The resulting m2ts file video is jerky as well

Jerky also where the mkv is not? Maybe there's something odd with your source file. Can you upload the MediaInfo of the source mkv?

[p1co]

I'd be damned, just did not see it. I checked and it said delay of 26ms. Just before remuxing I checked again and the delay it's gone.

Also the mkv play on vlc on my laptop is not jerky.

[p1co]

Anyone has any idea what could be going wrong? Could it be the laptop processor not being very fast?

[ProWo]

You should post a FULL mediainfo report (text mode) here, with ALL streams...

[p1co]

There you go

[Ennio]

I think something went wrong. When you've opened your video with MediaInfo, go File --> Export. Choose "Text" and set destination file.
It's the text from that file you can copy/paste here

[p1co]

But that's what I did.

[p1co]

Is this better?

[ProWo]

Is this better?

No

[p1co]

What could I be doing wrong? With such simple instructions? media info is version 21.09