<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body>
<br>
<br>
<div class="moz-cite-prefix">Den 16.01.2024 23:32, skrev Andrew
Randrianasulu:<br>
</div>
<blockquote type="cite"
cite="mid:CA+rFky5Mg4ZNNUR7G86ssz5p589rM_PUYj65edysNzLL211k7w@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="auto">
<div><br>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">ср, 17 янв. 2024 г., 01:14
Andrew Randrianasulu <<a
href="mailto:randrianasulu@gmail.com" target="_blank"
rel="noreferrer" moz-do-not-send="true"
class="moz-txt-link-freetext">randrianasulu@gmail.com</a>>:<br>
</div>
<blockquote class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="auto">
<div><br>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">ср, 17 янв. 2024
г., 01:04 Andrew Randrianasulu <<a
href="mailto:randrianasulu@gmail.com"
rel="noreferrer noreferrer noreferrer"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">randrianasulu@gmail.com</a>>:<br>
</div>
<blockquote class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="auto">
<div><br>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">ср, 17
янв. 2024 г., 00:42 Terje J. Hanssen <<a
href="mailto:terjejhanssen@gmail.com"
rel="noreferrer noreferrer noreferrer noreferrer" target="_blank"
moz-do-not-send="true"
class="moz-txt-link-freetext">terjejhanssen@gmail.com</a>>:<br>
</div>
<blockquote class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div> <br>
<br>
<div>Den 16.01.2024 21:35, skrev Andrew
Randrianasulu:<br>
</div>
<blockquote type="cite">
<div dir="auto">
<div><br>
<br>
<div class="gmail_quote">
<div dir="ltr"
class="gmail_attr">вт, 16 янв.
2024 г., 23:30 Terje J.
Hanssen <<a
href="mailto:terjejhanssen@gmail.com"
rel="noreferrer noreferrer noreferrer noreferrer noreferrer"
target="_blank"
moz-do-not-send="true"
class="moz-txt-link-freetext">terjejhanssen@gmail.com</a>>:<br>
</div>
<blockquote class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div> <br>
<br>
<div>Den 16.01.2024 20:23,
skrev Andrew
Randrianasulu:<br>
</div>
<blockquote type="cite">
<div dir="auto"><a
href="https://trac.ffmpeg.org/ticket/1258"
rel="noreferrer noreferrer noreferrer noreferrer noreferrer noreferrer"
target="_blank"
moz-do-not-send="true"
class="moz-txt-link-freetext">https://trac.ffmpeg.org/ticket/1258</a>
<div dir="auto"><br>
</div>
<div dir="auto">see
attached to this
ticket modded decoder
...</div>
<div dir="auto"><br>
</div>
<div dir="auto">I wonder
if Terje's audio
really 4ch? if so,may
be we can decode it to
4* wav first, then
encode them correctly
to bluray lpcm / dvd
pcm / ac3 ...</div>
</div>
</blockquote>
<br>
<br>
I did leave out some "empty
channels" to simplify and
clean up the post. Here are
the full ffprobe output for
the HDV source (mediainfo
was complete):<br>
</div>
</blockquote>
</div>
</div>
<div dir="auto"><br>
</div>
<div dir="auto"><br>
</div>
<div dir="auto">well, this ticket
still open, so ffmpeg tools do not
know yet about this .. extension?
It decodes in compat stereo mode.
I attached fixed decoder to this
ticket, it will be interesting if
you just run ffmpeg acodec copy
command and then compile and run
decoder on it .. it may decode to
4 files! But not sure how it all
was arranged when it comes to
microphones ...? Does camera
contain 4 of them? or you were
supposed to connect your own
array?</div>
</div>
</blockquote>
<br>
Well, I think Steve Mullen's handbook
for Sony FX7 (mine) and V1 clarify there
is only two audo channels on my FX7::<br>
<ul>
<li>There is two types of HDV:
HD1/720p (19 Mbps) and HD2/1080i /25
Mbps) and Canon's 1080p24.</li>
<li>HD1 is recorded to DV tape using
only the DV video segment. The PCM
audio segment is open for future
use.</li>
<li>HD2 is recorded to DV tape using
both the DV video segment and the
PCM audio segment. A small Subcode
(ITI) segment holds data such</li>
<li>as timecode. Because no PCM audio
segments are available, HD2 cannot
carry record PCM audio.</li>
<li>MPEG-1 Audio:</li>
<li>Both HD1 and HD2 support two audio
channels of audio signals that are
digitized with a 48kHz at 16-bit
quantization and compressed to</li>
<li>384kbps by MPEG-1 Audio Layer 2
encoding. ProHD adds two-channel PCM
audio thus creating a format that
can carry four independent</li>
<li>channels of audio. (See Chapter 2
for an in-depth introduction to
MPEG-1 audio.)</li>
</ul>
</div>
</blockquote>
</div>
</div>
<div dir="auto"><br>
</div>
<div dir="auto">yeah, seems to be rarely
supported on HDV cameras, see</div>
<div dir="auto"><br>
</div>
<div dir="auto"><a
href="https://forum.blackmagicdesign.com/viewtopic.php?f=33&t=171688"
rel="noreferrer noreferrer noreferrer noreferrer" target="_blank"
moz-do-not-send="true">https://forum.blackmagicdesign.com/viewtopic.php?f=33&t=171688</a><br>
</div>
<div dir="auto"><br>
</div>
<div dir="auto">but still!</div>
</div>
</blockquote>
</div>
</div>
<div dir="auto"><br>
</div>
<div dir="auto"><a
href="https://ieba.wordpress.com/2008/01/21/hdv-grows-up-sonys-hvr-s270-and-hvr-z7/"
rel="noreferrer noreferrer noreferrer"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">https://ieba.wordpress.com/2008/01/21/hdv-grows-up-sonys-hvr-s270-and-hvr-z7/</a><br>
</div>
<div dir="auto"><br>
</div>
<div dir="auto">=====</div>
<div dir="auto"><strong>4-Channel Audio</strong><br>
The HDV specification, like the DV specification, has
allowed for four-channel audio recording from the
outset. Few cameras took advantage of it, and when
they did, it was an add-on that did not maintain full
balanced audio throughout. Though the smaller Sony
HVR-Z7 records only two channels of audio, the larger
HVR-S270 has two XLR inputs in the front of the
camcorder and two XLR inputs on the back of the
camcorder. Each one has a separate audio level control
and an automatic level control switch on the side of
the camcorder.<br>
</div>
<div dir="auto">=====</div>
</div>
</blockquote>
</div>
</div>
<div dir="auto"><br>
</div>
<div dir="auto"><br>
</div>
<div dir="auto">and samples:</div>
<div dir="auto"><br>
</div>
<div dir="auto"><a
href="https://forum.doom9.org/archive/index.php/t-125966-p-46.html"
target="_blank" rel="noreferrer" moz-do-not-send="true"
class="moz-txt-link-freetext">https://forum.doom9.org/archive/index.php/t-125966-p-46.html</a><br>
</div>
<div dir="auto"><br>
</div>
<div dir="auto">=====</div>
<div dir="auto"><br>
</div>
<div dir="auto">As you can see 4 channel audio is part of the
HDV format. I am not sure if there are actually 2 audiostreams
or only 1. There is no way I can check this because the camera
itself only outputs the 4 ch and no 2 ch. But the computer
will only play a 2 ch. But when you compare the MediaInfo
audio information with the specs I expect that there are 2
audio stream just like eac3to detects. It would be very very
nice if HDV support can be integrated into eac3to because many
professional cameramen are looking for an solution.<br>
<br>
Currently eac3to extracts the m2v and 2ch audio stream fine.
Only the 4 channel stream isn't detected nor extracted. I
uploaded 2 sample to my server for analysis:<br>
<a
href="http://tools.twanwintjes.nl/uploads/temp/00_0001_2010-11-07_153401.M2T"
moz-do-not-send="true" class="moz-txt-link-freetext">http://tools.twanwintjes.nl/uploads/temp/00_0001_2010-11-07_153401.M2T</a>
(49 seconds / 152MB) - Right Click --> Save As<br>
<a
href="http://tools.twanwintjes.nl/uploads/temp/00_0002_2010-11-07_214302.M2T"
moz-do-not-send="true" class="moz-txt-link-freetext">http://tools.twanwintjes.nl/uploads/temp/00_0002_2010-11-07_214302.M2T</a>
(44 seconds / 137MB) - Right Click --> Save As<br>
</div>
<div dir="auto"><br>
</div>
<div dir="auto"><br>
</div>
<div dir="auto">==== </div>
<div dir="auto"><br>
</div>
<div dir="auto">yes, files still there :)</div>
<div dir="auto"><br>
</div>
</div>
</blockquote>
Yeah, I saw some of the forum threads and had a look on the sample
files.<br>
For me they the ffprobe outputs were identical with my own hdv.m2t
files.<br>
I think as Mullen wrote, the limit for miniDV or HDV tapes was
utilized for 1080i HD2 with 25 Mbps.<br>
Only the 720p HD2 format with 19 Mbps had PCM tracs free for later
use. Maybe other camcorders..<br>
<br>
Possibly file storage on other disc media could be utilized for
larger bandwidth.<br>
But I cannot see it was mentioned for the targeted camcorder disc
recorder<br>
<a class="moz-txt-link-freetext" href="https://www.bhphotovideo.com/c/product/461819-REG/Sony_HVRDR60_HVRDR60_Hard_Disk_Recording.html">https://www.bhphotovideo.com/c/product/461819-REG/Sony_HVRDR60_HVRDR60_Hard_Disk_Recording.html</a><br>
<br>
<blockquote type="cite"
cite="mid:CA+rFky5Mg4ZNNUR7G86ssz5p589rM_PUYj65edysNzLL211k7w@mail.gmail.com">
<div dir="auto">
<div dir="auto">
<div class="gmail_quote">
<blockquote class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="auto">
<div dir="auto"><br>
</div>
<div dir="auto"><br>
</div>
<div dir="auto">
<div class="gmail_quote">
<blockquote class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="auto">
<div dir="auto"><br>
</div>
<div dir="auto"><br>
</div>
<div dir="auto">
<div class="gmail_quote">
<blockquote class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
<ul>
</ul>
<br>
<blockquote type="cite">
<div dir="auto">
<div dir="auto">
<div class="gmail_quote">
<blockquote class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
<blockquote><font
face="Courier New, Courier, monospace">ffprobe -hide_banner hdv07_05.m2t</font><br>
<font
face="Courier New, Courier, monospace">[mpeg2video @ 0x55d58a968340]
Invalid frame dimensions
0x0.</font><br>
<font
face="Courier New, Courier, monospace"> Last message repeated 7 times</font><br>
<font
face="Courier New, Courier, monospace">[mpegts @ 0x55d58a93e580] Could
not find codec
parameters for stream 2
(Unknown: none
([160][0][0][0] /
0x00A0)): unknown codec</font><br>
<font
face="Courier New, Courier, monospace">Consider increasing the value for
the 'analyzeduration'
(0) and 'probesize'
(5000000) options</font><br>
<font
face="Courier New, Courier, monospace">[mpegts @ 0x55d58a93e580] Could
not find codec
parameters for stream 3
(Unknown: none
([161][0][0][0] /
0x00A1)): unknown codec</font><br>
<font
face="Courier New, Courier, monospace">Consider increasing the value for
the 'analyzeduration'
(0) and 'probesize'
(5000000) options</font><br>
<font
face="Courier New, Courier, monospace">Input #0, mpegts, from
'hdv07_05.m2t':</font><br>
<font
face="Courier New, Courier, monospace"> Duration: 00:06:58.27, start:
3276.528000, bitrate:
25626 kb/s</font><br>
<font
face="Courier New, Courier, monospace"> Program 100 </font><br>
<font
face="Courier New, Courier, monospace"> Stream #0:0[0x810]: Video:
mpeg2video (Main)
([2][0][0][0] / 0x0002),
yuv420p(tv, bt709, top
first), 1440x1080 [SAR
4:3 DAR 16:9], 25000
kb/s, 25 fps, 25 tbr,
90k tbn, 50 tbc</font><br>
<font
face="Courier New, Courier, monospace"> Side data:</font><br>
<font
face="Courier New, Courier, monospace"> cpb: bitrate max/min/avg:
25000000/0/0 buffer
size: 7340032 vbv_delay:
N/A</font><br>
<font
face="Courier New, Courier, monospace"> Stream #0:1[0x814]: Audio: mp2
([3][0][0][0] / 0x0003),
48000 Hz, stereo, fltp,
384 kb/s</font><br>
<font
face="Courier New, Courier, monospace"> Stream #0:2[0x815]: Unknown:
none ([160][0][0][0] /
0x00A0)</font><br>
<font
face="Courier New, Courier, monospace"> Stream #0:3[0x811]: Unknown:
none ([161][0][0][0] /
0x00A1)</font><br>
<font
face="Courier New, Courier, monospace">Unsupported codec with id 0 for
input stream 2</font><br>
<font
face="Courier New, Courier, monospace">Unsupported codec with id 0 for
input stream 3</font><br>
</blockquote>
<br>
<br>
<br>
<br>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
<br>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
<br>
</body>
</html>