[Cin] HDV is really 4 channel?

[Andrew Randrianasulu]

вт, 16 янв. 2024 г., 23:30 Terje J. Hanssen <terjejhanssen at gmail.com>:

>
>
> 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?

> 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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