Den 16.01.2024 21:35, skrev Andrew Randrianasulu:
вт, 16 янв. 2024 г., 23:30 Terje J. Hanssen <[email protected]>:
Den 16.01.2024 20:23, skrev Andrew Randrianasulu:
https://trac.ffmpeg.org/ticket/1258
see attached to this ticket modded decoder ...
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 ...
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):
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?
Well, I think Steve Mullen's handbook for Sony FX7 (mine) and V1 clarify
there is only two audo channels on my FX7::
* There is two types of HDV: HD1/720p (19 Mbps) and HD2/1080i /25
Mbps) and Canon's 1080p24.
* HD1 is recorded to DV tape using only the DV video segment. The PCM
audio segment is open for future use.
* 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
* as timecode. Because no PCM audio segments are available, HD2 cannot
carry record PCM audio.
* MPEG-1 Audio:
* Both HD1 and HD2 support two audio channels of audio signals that
are digitized with a 48kHz at 16-bit quantization and compressed to
* 384kbps by MPEG-1 Audio Layer 2 encoding. ProHD adds two-channel PCM
audio thus creating a format that can carry four independent
* channels of audio. (See Chapter 2 for an in-depth introduction to
MPEG-1 audio.)
ffprobe -hide_banner hdv07_05.m2t
[mpeg2video @ 0x55d58a968340] Invalid frame dimensions 0x0.
Last message repeated 7 times
[mpegts @ 0x55d58a93e580] Could not find codec parameters for
stream 2 (Unknown: none ([160][0][0][0] / 0x00A0)): unknown codec
Consider increasing the value for the 'analyzeduration' (0)
and 'probesize' (5000000) options
[mpegts @ 0x55d58a93e580] Could not find codec parameters for
stream 3 (Unknown: none ([161][0][0][0] / 0x00A1)): unknown codec
Consider increasing the value for the 'analyzeduration' (0)
and 'probesize' (5000000) options
Input #0, mpegts, from 'hdv07_05.m2t':
Duration: 00:06:58.27, start: 3276.528000, bitrate: 25626 kb/s
Program 100
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
Side data:
cpb: bitrate max/min/avg: 25000000/0/0 buffer size: 7340032
vbv_delay: N/A
Stream #0:1[0x814]: Audio: mp2 ([3][0][0][0] / 0x0003),
48000 Hz, stereo, fltp, 384 kb/s
Stream #0:2[0x815]: Unknown: none ([160][0][0][0] / 0x00A0)
Stream #0:3[0x811]: Unknown: none ([161][0][0][0] / 0x00A1)
Unsupported codec with id 0 for input stream 2
Unsupported codec with id 0 for input stream 3
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