[Cin] HDV manual section need some work

[Andrew Randrianasulu]

чт, 3 нояб. 2022 г., 17:52 Terje J. Hanssen <terjejhanssen at gmail.com>:

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> Den 03.11.2022 01:42, skrev Andrew Randrianasulu via Cin:
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> чт, 3 нояб. 2022 г., 03:34 Andrew Randrianasulu <randrianasulu at gmail.com>:
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>> чт, 3 нояб. 2022 г., 03:14 Andrew Randrianasulu <randrianasulu at gmail.com
>> >:
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>>> I think we can add some clarification
>>>
>>> ---
>>> 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}
>>>
>>>
>>> ---
>>>
>>>
>>> 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!
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>> ffmpeg -i  HDV_1080i50.mov -c:v copy -c:a pcm_bluray  -mpegts_m2ts_mode 1
>> hdv.mts
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>> then tsmuxer recognizes mts file as below:
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>> ~/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 at 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
>>
>> ====
>>
>> I wonder if you can cp this file few times and then cat them back
>> together for simulating longer video ) ?
>>
>>
> https://github.com/OpenShot/openshot-qt/issues/3428#top
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> this one contain real very short hdv sample with mp2 sound
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> http://twenkid.com/os/3.m2t
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> I can try to dig and test further into this matter later this month - or
> possibly more realistic next month.
> Currently I spend some holiday weeks on Gran Canaria 😎
>


have good times (even without camcoder!)



> Some thoughts in advance:
>
> Would it possibly be better/clear to differ/split between the formats, HDV
> video on tape (M2T container) and the successor H264/AVC(HD) video on disk?
> https://en.wikipedia.org/wiki/HDV
>

sure, right now it confusing.



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> Possibly you still have the probably little longer HDV 1080i sample file,
> "20081103140154.m2t" we used for the HDV format patch here
> https://www.mail-archive.com/cin@lists.cinelerra-gg.org/msg02048.html
>


yeah, will call my friend 'find' )

thanks!



>
> And if  Phyllis has access to a Blu-ray disc burner and BD hw player,
> testing could possibly start sooner(?)
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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+}
>>>
>>
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