Convert audio in this file to wav without altering volume?

MikeLV wrote on 2/16/2020, 11:14 AM

SOLVED

Can someone download this small mts file and convert the audio in it to wav without altering the volume in either the source or resultant wav file, , and post the file for me to download? I'm troubleshooting... Thank you.

https://we.tl/t-cco0ppYRNF

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fifonik wrote on 2/17/2020, 3:18 PM

Thanks.

I tried to render from VP17 387 (my own source and source provided in the 1st post) and noticed no difference with images that you rendered from earlier versions. It is NOT as on your last pic.

Will try to render from VP15 & compare after my work, but I bet will find no difference.

UPDATE: found the issue. Trying to understand what is going on as from the first glance it is as it should be :)

fifonik wrote on 2/18/2020, 4:09 AM

I played a bit with my own source and found a few things...

source -- m2ts file with AC3 from my camcorder

Audio
ID                                       : 4352 (0x1100)
Menu ID                                  : 1 (0x1)
Format                                   : AC-3
Format/Info                              : Audio Coding 3
Commercial name                          : Dolby Digital
Codec ID                                 : 129
Duration                                 : 40 s 544 ms
Bit rate mode                            : Constant
Bit rate                                 : 384 kb/s
Channel(s)                               : 6 channels
Channel layout                           : L R C LFE Ls Rs
Sampling rate                            : 48.0 kHz
Frame rate                               : 31.250 FPS (1536 SPF)
Compression mode                         : Lossy
Delay relative to video                  : -34 ms
Stream size                              : 1.86 MiB (2%)
Service kind                             : Complete Main

VP15 wav -- wav file rendered from the source using VP15 build 416 (no any filters, file dropped onto time line and rendered as wav with the same frame rate & channels, 16 bit).

VP17 wav --wav file rendered from the source using VP17 build 387 (no any filters, file dropped onto time line and rendered as wav with the same frame rate & channels, 16 bit).

VP15 wav and VP17 wav files have exactly the same file sizes.

If I put source and VP17 wav into VP17 project -- I see the same waveforms. When played, audio volume is the same. If one audio track "phase inverted", it would be silence (well, almost).

If I put source and VP15 wav into VP15 project -- I see the different waveforms (source looks louder). But when played, audio volume is the same. If one audio track "phase inverted", it would be silence (well, almost). Another strange thing -- when I'm zooming in, on some zoom level waveforms started to look the same.

If I play files in Windows Media Player (WMP) -- volume is the same for source and VP17 wav. VP15 wav is quieter.

If I play files in my system default PotPlayer -- volume is the same for source and VP17 wav. VP15 wav is quieter (as in WMP).

If I play files in Media Player Classic - Home Cinema (MPC HC) -- volume is the same for source and VP15 wav. VP17 was is louder.

If I open files in Sound Forge 12 -- source and VP17 wav waveforms looks the same. VP15 wav waveform looks like it is quieter. But, when played, source and VP15 wav have the same volume, while VP17 is louder. Statistics shows the same (RMS): source and VP15 wav -29dB, VP17 wav -20dB.

Crazy stuff %-)

P.S. In MPC HC & PotPlayer audio normalization is OFF.