Merge .mp3 to .m2ts

[omidsolo]

Howdy,
I have a FHD .m2ts video and want to remove its audio and use another .mp3 audio to merge in it, just to replace audio.
The timing of .m2ts and .mp3 are exactly same, which software can do it without encoding/decoding and loss of quality?
Cheers

[Baldrick]

Must it be m2ts?

You can make a mkv with mkvmergegui, add the m2ts and the mp3 and mux a mkv.

[hello_hello]

TSMuxer if you want to keep the output as m2ts. Or you can extract the video with TSMuxer and remux with another program such as MyMP4BoxGUI.
MKVMergeGUI if you'd prefer the output to be MKV. It'll open m2ts files directly.

[El Heggunte]

^ Yes, TSmuxer. Just rename the *.MP3 to *.MPA, or choose "All Files" in the 'Add media files' window.

BUT — keep in mind that at least some old versions of MPlayer (and perhaps of VLC as well) didn't like MP3 audio in transport streams (and/or AAC in program streams)

[pandy]

Use ffmpeg:

@ffmpeg -i %1 -i %2 -c copy -map 0:v:0 -map 1:a:0 -bsf:v h264_mp4toannexb -shortest -mpegts_m2ts_mode 1 -y %1.m2ts

First stream (%1) video, second (%2) audio, assumption is that video will be h.264.