[FFmpeg-user] MP4 to wav

[Carl Zwanzig]

On 4/13/2023 12:14 AM, Paul B Mahol wrote:
> It is not mp4 file format.

That's right, it's not (don't believe the file extension)--
Complete name                            : C:/temp/1122.mp4
Format                                   : MPEG-PS
File size                                : 1.37 MiB
Duration                                 : 13 s 937 ms
Overall bit rate                         : 823 kb/s
FileExtension_Invalid                    : mpeg mpg m2p vob vro pss evo

Video
ID                                       : 224 (0xE0)
Format                                   : HEVC
Format/Info                              : High Efficiency Video Coding
Format profile                           : Main at L4.1@Main
Duration                                 : 13 s 937 ms
[...]

Audio
ID                                       : 192 (0xC0)
Format                                   : MPEG Audio
Format version                           : Version 2.5
Format profile                           : Layer 2
Format settings                          : Dual mono / Reserved
Duration                                 : 10 s 600 ms
Bit rate mode                            : Constant
Bit rate                                 : 40.0 kb/s
[...]


If the file extension is wrong for the contents, it's possible that the 
audio format tagging is also wrong -or- more likely that the OP was told 
G722 while it's really mpeg. It's also possible that there was a problem 
with the original encoding.


z!