Den 03.11.2022 01:42, skrev Andrew Randrianasulu via Cin:
чт, 3 нояб. 2022 г., 03:34 Andrew Randrianasulu <[email protected]>:
чт, 3 нояб. 2022 г., 03:14 Andrew Randrianasulu
<[email protected]>:
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}
---
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
<http://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
====
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
this one contain real very short hdv sample with mp2 sound
http://twenkid.com/os/3.m2t
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 😎
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
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/[email protected]/msg02048.html
And if Phyllis has access to a Blu-ray disc burner and BD hw player,
testing could possibly start sooner(?)
----
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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