чт, 3 нояб. 2022 г., 03:14 Andrew Randrianasulu <randrianasulu@gmail.com>:

I think we can add some clarification

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HDV on a Blu-ray Disc Without Re-encoding

An MTS file is a video file saved in the high-definition (HD) MPEG Transport Stream video format, commonly called AVCHD. It contains HD video compatible with Blu-ray disc format and is based on the MPEG-2 transport stream. MTS files are often used by Sony, Panasonic, Canon and other HD camcorders. Legal input for Video – MPEG1VIDEO, MPEG2VIDEO, H264; Audio – MP1, MP2, AC3, AC3PLUS, DTS, TRUHD.

Note, mp2 and mp1 audio codecs are valid for transport stream itself but not as on-disk format for Blu-Rays.

In this case you still can save original video by using ffmpeg's switches

 -c:v copy -c:a ac3 , while outputting into another temporal ts container.

{waiting for Terje's results on pcm_bluray case}

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I think all m2ts files you used for testing were h264/aac (or ac3), not from-camcoder HDVs with mpeg2 video/mp2 audio. 

you can try HDV-in-mov from this folder as ffmpeg test file, I think

http://samples.mplayerhq.hu/mov/FCP/

oh, this is not mp2 audio but pcm audio. And ..not exactly kind of pcm used on blurays!

so this line work, note mpegts_m2ts_mode switch for enabling more bluray like output, without it ffmpeg will mux audio into private stream -  good luck getting it back!

ffmpeg -i  HDV_1080i50.mov -c:v copy -c:a pcm_bluray  -mpegts_m2ts_mode 1 hdv.mts

then tsmuxer recognizes mts file as below:

~/tsMuxer $ tsmuxer hdv.mts

tsMuxeR version 2.6.16-dev. github.com/justdan96/tsMuxer

Track ID:    4113                                                       Stream type: MPEG-2

Stream ID:   V_MPEG-2

Stream info: Profile: Main@6. Resolution: 1440:1080i. Frame rate: 25

Stream lang:

Track ID:    4352

Stream type: LPCM

Stream ID:   A_LPCM

Stream info: Bitrate: 1536Kbps  Sample Rate: 48KHz  Channels: 2  Bits per sample: 16bit

Stream lang: eng

Duration: 00:00:08.000

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I wonder if you can cp this file few times and then cat them back together for simulating longer video ) ?

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For creating a blu-ray disc, if you have HDV MPEG-2 media that is in blu-ray format, you can save the original quality of your work, rather than rendering it to another format. 

{I hope Terje will let us know if bdwrite still works with bluray pcm audio as produced by ffmpeg 5.1+}