PCAP to AMR Conversion with DTX

https://stackoverflow.com/questions/18209782
24-06-2022
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Pregunta
I am trying to convert a PCAP containing a RTP Payload with an octet-aligned AMR-WB payload to a playable AMR file.
Regarding the AMR storage format described in https://www.rfc-editor.org/rfc/rfc4867#section-4 between SID frames NO_DATA (0x7C) frames need to be inserted. This is especially important when using DTX (discontinuous transmission) mode.
The question in AMR Raw Output from Wireshark not playing in players describes a way to convert a single PCAP UDP packet to AMR but does not consider a whole packet flow where packets need to be concatenated or NO_DATA frames need to be inserted after SID frames in DTX mode.
I managed converting it parsing every packet with PCAP.net and now wonder whether my output is correct. I could not find any information on which audio player supports AMR-WB in DTX Mode, though.
VLC Player plays it correctly with the speech pauses, but shows the wrong total time of the file and when converting it to *.wav (using VLC), there will be no speech pauses anymore.
I would like to analyze my speech data using a tool as audacity which shows the spectrum of the sound. Unfortunately, audacity shows loud bangs in the speech pauses (see picture). Therefore, I do not know whether audacity just does not support DTX or my output is corrupt?
It would be great if you can help.
Audacity Bangs in Speech Pauses (SID+NO_DATA Frames)
Here the output Soundfile (just use a hex editor and call it *.amr):
00000000h: 23 21 41 4D 52 2D 57 42 0A 4C EB FF BD F3 C7 7C ; #!AMR-WB.Lëÿ½óÇ|
00000010h: 7C 4C EB FF BD F3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB ; |Lëÿ½ó×|||||||Lë
00000020h: FF BD B3 97 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD E3 ; ÿ½³—|||||||Lëÿ½ã
00000030h: D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD B3 97 7C 7C ; ×|||||||Lëÿ½³—||
00000040h: 7C 7C 7C 7C 7C 4C EB FF BD B3 97 7C 7C 7C 7C 7C ; |||||Lëÿ½³—|||||
00000050h: 7C 7C 4C EB FF BD B3 D7 7C 7C 7C 7C 7C 7C 7C 4C ; ||Lëÿ½³×|||||||L
00000060h: EB FF BD B3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD ; ëÿ½³×|||||||Lëÿ½
00000070h: F3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD B3 97 7C ; ó×|||||||Lëÿ½³—|
00000080h: 7C 7C 7C 7C 7C 7C 4C EB FF BD B3 97 7C 7C 7C 7C ; ||||||Lëÿ½³—||||
00000090h: 7C 7C 7C 4C EB FF BD F3 D7 7C 7C 7C 7C 7C 7C 7C ; |||Lëÿ½ó×|||||||
000000a0h: 4C EB FF BD F3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF ; Lëÿ½ó×|||||||Lëÿ
000000b0h: BD B3 97 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD F3 D7 ; ½³—|||||||Lëÿ½ó×
000000c0h: 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD F3 D7 7C 7C 7C ; |||||||Lëÿ½ó×|||
000000d0h: 7C 7C 7C 7C 4C EB FF BD B3 D7 7C 7C 7C 7C 7C 7C ; ||||Lëÿ½³×||||||
000000e0h: 7C 4C EB FF BD F3 97 7C 7C 7C 7C 7C 7C 7C 4C EB ; |Lëÿ½ó—|||||||Lë
000000f0h: FF BD F3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD F3 ; ÿ½ó×|||||||Lëÿ½ó
00000100h: D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD F3 D7 7C 7C ; ×|||||||Lëÿ½ó×||
00000110h: 7C 7C 7C 7C 7C 4C EB FF BD B3 97 7C 7C 7C 7C 7C ; |||||Lëÿ½³—|||||
00000120h: 7C 7C 4C EB FF BD B3 D7 7C 7C 7C 7C 7C 7C 7C 4C ; ||Lëÿ½³×|||||||L
00000130h: EB FF BD B3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD ; ëÿ½³×|||||||Lëÿ½
00000140h: F3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD F3 97 7C ; ó×|||||||Lëÿ½ó—|
00000150h: 7C 7C 7C 7C 7C 7C 4C EB FF BD F3 D7 7C 7C 7C 7C ; ||||||Lëÿ½ó×||||
00000160h: 7C 7C 7C 4C EB FF BD B3 D7 7C 7C 7C 7C 7C 7C 7C ; |||Lëÿ½³×|||||||
00000170h: 4C EB FF BD B3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF ; Lëÿ½³×|||||||Lëÿ
00000180h: BD F3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD F3 97 ; ½ó×|||||||Lëÿ½ó—
00000190h: 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD F3 D7 7C 7C 7C ; |||||||Lëÿ½ó×|||
000001a0h: 7C 7C 7C 7C 4C EB FF BD F3 F7 7C 7C 7C 7C 7C 7C ; ||||Lëÿ½ó÷||||||
000001b0h: 7C 4C EB FF BD B3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB ; |Lëÿ½³×|||||||Lë
000001c0h: FF BD F3 97 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD 63 ; ÿ½ó—|||||||Lëÿ½c
000001d0h: D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD B3 D7 7C 7C ; ×|||||||Lëÿ½³×||
000001e0h: 7C 7C 7C 7C 7C 4C EB FF BD B3 D7 7C 7C 7C 7C 7C ; |||||Lëÿ½³×|||||
000001f0h: 7C 7C 4C EB FF BD F3 97 7C 7C 7C 7C 7C 7C 7C 4C ; ||Lëÿ½ó—|||||||L
00000200h: EB FF BD B3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD ; ëÿ½³×|||||||Lëÿ½
00000210h: B3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD B3 D7 7C ; ³×|||||||Lëÿ½³×|
00000220h: 7C 7C 7C 7C 7C 7C 4C EB FF BD F3 D7 7C 7C 7C 7C ; ||||||Lëÿ½ó×||||
00000230h: 7C 7C 7C 4C EB FF BD B3 D7 7C 7C 7C 7C 7C 7C 7C ; |||Lëÿ½³×|||||||
00000240h: 4C EB FF BD B3 97 7C 7C 7C 7C 7C 7C 7C 4C EB FF ; Lëÿ½³—|||||||Lëÿ
00000250h: BD F3 B7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD F3 97 ; ½ó·|||||||Lëÿ½ó—
00000260h: 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD F3 D7 7C 7C 7C ; |||||||Lëÿ½ó×|||
00000270h: 7C 7C 7C 7C 4C EB FF BD F3 D7 7C 7C 7C 7C 7C 7C ; ||||Lëÿ½ó×||||||
00000280h: 7C 4C EB FF BD B3 97 7C 7C 7C 7C 7C 7C 7C 4C EB ; |Lëÿ½³—|||||||Lë
00000290h: FF BD F3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD F3 ; ÿ½ó×|||||||Lëÿ½ó
000002a0h: 97 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD B3 D7 7C 7C ; —|||||||Lëÿ½³×||
000002b0h: 7C 7C 7C 7C 7C 4C EB FF BD B3 D7 7C 7C 7C 7C 7C ; |||||Lëÿ½³×|||||
000002c0h: 7C 7C 4C EB FF BD F3 D7 7C 7C 7C 7C 7C 7C 7C 4C ; ||Lëÿ½ó×|||||||L
000002d0h: EB FF BD B3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD ; ëÿ½³×|||||||Lëÿ½
000002e0h: F3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD F3 D7 7C ; ó×|||||||Lëÿ½ó×|
000002f0h: 7C 7C 7C 7C 7C 7C 4C EB FF BD B3 97 7C 7C 7C 7C ; ||||||Lëÿ½³—||||
00000300h: 7C 7C 7C 4C EB FF BD F3 D7 7C 7C 7C 7C 7C 7C 7C ; |||Lëÿ½ó×|||||||
00000310h: 4C EB FF BD B3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF ; Lëÿ½³×|||||||Lëÿ
00000320h: BD F3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD F3 D7 ; ½ó×|||||||Lëÿ½ó×
00000330h: 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD B3 D7 7C 7C 7C ; |||||||Lëÿ½³×|||
00000340h: 7C 7C 7C 7C 4C EB FF BD F3 D7 7C 7C 7C 7C 7C 7C ; ||||Lëÿ½ó×||||||
00000350h: 7C 4C EB FF BD B3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB ; |Lëÿ½³×|||||||Lë
00000360h: FF BD F3 97 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD B3 ; ÿ½ó—|||||||Lëÿ½³
00000370h: D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD B3 D7 7C 7C ; ×|||||||Lëÿ½³×||
00000380h: 7C 7C 7C 7C 7C 4C EB FF BD F3 D7 7C 7C 7C 7C 7C ; |||||Lëÿ½ó×|||||
00000390h: 7C 7C 4C EB FF BD A3 97 7C 7C 7C 7C 7C 7C 7C 4C ; ||Lëÿ½£—|||||||L
000003a0h: EB FF BD E3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD ; ëÿ½ã×|||||||Lëÿ½
000003b0h: F3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD F3 97 7C ; ó×|||||||Lëÿ½ó—|
000003c0h: 7C 7C 7C 7C 7C 7C 4C EB FF BD F3 97 7C 7C 7C 7C ; ||||||Lëÿ½ó—||||
000003d0h: 7C 7C 7C 4C EB FF BD F3 D7 7C 7C 7C 7C 7C 7C 7C ; |||Lëÿ½ó×|||||||
000003e0h: 4C EB FF BD B3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF ; Lëÿ½³×|||||||Lëÿ
000003f0h: BD B3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD B3 D7 ; ½³×|||||||Lëÿ½³×
00000400h: 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD F3 97 7C 7C 7C ; |||||||Lëÿ½ó—|||
00000410h: 7C 7C 7C 7C 4C EB FF BD F3 D7 7C 7C 7C 7C 7C 7C ; ||||Lëÿ½ó×||||||
00000420h: 7C 4C EB FF BD B3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB ; |Lëÿ½³×|||||||Lë
00000430h: FF BD F3 97 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD B3 ; ÿ½ó—|||||||Lëÿ½³
00000440h: 97 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD B3 97 7C 7C ; —|||||||Lëÿ½³—||
00000450h: 7C 7C 7C 7C 7C 4C EB FF BD B3 D7 7C 7C 7C 7C 7C ; |||||Lëÿ½³×|||||
00000460h: 7C 7C 4C EB FF BD F3 97 7C 7C 7C 7C 7C 7C 7C 4C ; ||Lëÿ½ó—|||||||L
00000470h: EB FF BD E3 97 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD ; ëÿ½ã—|||||||Lëÿ½
00000480h: B3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD F3 97 7C ; ³×|||||||Lëÿ½ó—|
00000490h: 7C 7C 7C 7C 7C 7C 4C EB FF BD B3 D7 7C 7C 7C 7C ; ||||||Lëÿ½³×||||
000004a0h: 7C 7C 7C 4C EB FF BD F3 97 7C 7C 7C 7C 7C 7C 7C ; |||Lëÿ½ó—|||||||
000004b0h: 4C EB FF BD B3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF ; Lëÿ½³×|||||||Lëÿ
000004c0h: BD F3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD B3 D7 ; ½ó×|||||||Lëÿ½³×
000004d0h: 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD F3 97 7C 7C 7C ; |||||||Lëÿ½ó—|||
000004e0h: 7C 7C 7C 7C 4C EB FF BD B3 D7 7C 7C 7C 7C 7C 7C ; ||||Lëÿ½³×||||||
000004f0h: 7C 4C EB FF BD B3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB ; |Lëÿ½³×|||||||Lë
00000500h: FF BD F3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD B3 ; ÿ½ó×|||||||Lëÿ½³
00000510h: D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD F3 D7 7C 7C ; ×|||||||Lëÿ½ó×||
00000520h: 7C 7C 7C 7C 7C 4C EB FF BD F3 97 7C 7C 7C 7C 7C ; |||||Lëÿ½ó—|||||
00000530h: 7C 7C 4C EB FF BD B3 97 7C 7C 7C 7C 7C 7C 7C 4C ; ||Lëÿ½³—|||||||L
00000540h: EB FF BD B3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD ; ëÿ½³×|||||||Lëÿ½
00000550h: F3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD F3 D7 7C ; ó×|||||||Lëÿ½ó×|
00000560h: 7C 7C 7C 7C 7C 7C 4C EB FF BD B3 D7 7C 7C 7C 7C ; ||||||Lëÿ½³×||||
00000570h: 7C 7C 7C 4C EB FF BD B3 97 7C 7C 7C 7C 7C 7C 7C ; |||Lëÿ½³—|||||||
00000580h: 4C EB FF BD E3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF ; Lëÿ½ã×|||||||Lëÿ
00000590h: BD F3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD E3 D7 ; ½ó×|||||||Lëÿ½ã×
000005a0h: 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD B3 D7 7C 7C 7C ; |||||||Lëÿ½³×|||
000005b0h: 7C 7C 7C 7C 4C EB FF BD F3 D7 7C 7C 7C 7C 7C 7C ; ||||Lëÿ½ó×||||||
000005c0h: 7C 4C EB FF BD F3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB ; |Lëÿ½ó×|||||||Lë
000005d0h: FF BD F3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD B3 ; ÿ½ó×|||||||Lëÿ½³
000005e0h: D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD F3 D7 7C 7C ; ×|||||||Lëÿ½ó×||
000005f0h: 7C 7C 7C 7C 7C 4C EB FF BD F3 D7 7C 7C 7C 7C 7C ; |||||Lëÿ½ó×|||||
00000600h: 7C 7C 4C EB FF BD B3 D7 7C 7C 7C 7C 7C 7C 7C 4C ; ||Lëÿ½³×|||||||L
00000610h: EB FF BD F3 97 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD ; ëÿ½ó—|||||||Lëÿ½
00000620h: F3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD F3 D7 7C ; ó×|||||||Lëÿ½ó×|
00000630h: 7C 7C 7C 7C 7C 7C 4C EB FF BD F3 D7 7C 7C 7C 7C ; ||||||Lëÿ½ó×||||
00000640h: 7C 7C 7C 4C EB FF BD F3 D7 7C 7C 7C 7C 7C 7C 7C ; |||Lëÿ½ó×|||||||
00000650h: 4C EB FF BD F3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF ; Lëÿ½ó×|||||||Lëÿ
00000660h: BD B3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD B3 D7 ; ½³×|||||||Lëÿ½³×
00000670h: 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD B3 97 7C 7C 7C ; |||||||Lëÿ½³—|||
00000680h: 7C 7C 7C 7C 4C EB FF BD F3 97 7C 7C 7C 7C 7C 7C ; ||||Lëÿ½ó—||||||
00000690h: 7C 4C EB FF BD F3 97 7C 7C 7C 7C 7C 7C 7C 4C EB ; |Lëÿ½ó—|||||||Lë
000006a0h: FF BD F3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD E3 ; ÿ½ó×|||||||Lëÿ½ã
000006b0h: 97 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD B3 D7 7C 7C ; —|||||||Lëÿ½³×||
000006c0h: 7C 7C 7C 7C 7C 4C EB FF BD B3 D7 7C 7C 7C 7C 7C ; |||||Lëÿ½³×|||||
000006d0h: 7C 7C 4C EB FF BD B3 D7 7C 7C 7C 7C 7C 7C 7C 4C ; ||Lëÿ½³×|||||||L
000006e0h: EB FF BD B3 97 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD ; ëÿ½³—|||||||Lëÿ½
000006f0h: B3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD F3 D7 7C ; ³×|||||||Lëÿ½ó×|
00000700h: 7C 7C 7C 7C 7C 7C 4C EB FF BD B3 D7 7C 7C 7C 7C ; ||||||Lëÿ½³×||||
00000710h: 7C 7C 7C 4C EB FF BD A3 D7 7C 7C 7C 7C 7C 7C 7C ; |||Lëÿ½£×|||||||
00000720h: 4C EB FF BD F3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF ; Lëÿ½ó×|||||||Lëÿ
00000730h: BD F3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD F3 D7 ; ½ó×|||||||Lëÿ½ó×
00000740h: 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD F3 D7 7C 7C 7C ; |||||||Lëÿ½ó×|||
00000750h: 7C 7C 7C 7C 4C EB FF BD F3 D7 7C 7C 7C 7C 7C 7C ; ||||Lëÿ½ó×||||||
00000760h: 7C 4C EB FF BD F3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB ; |Lëÿ½ó×|||||||Lë
00000770h: FF BD B3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD B3 ; ÿ½³×|||||||Lëÿ½³
00000780h: 97 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD B3 D7 7C 7C ; —|||||||Lëÿ½³×||
00000790h: 7C 7C 7C 7C 7C 4C EB FF BD F3 D7 7C 7C 7C 7C 7C ; |||||Lëÿ½ó×|||||
000007a0h: 7C 7C 4C EB FF BD E3 D7 7C 7C 7C 7C 7C 7C 7C 4C ; ||Lëÿ½ã×|||||||L
000007b0h: EB FF BD F3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD ; ëÿ½ó×|||||||Lëÿ½
000007c0h: E3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD B3 D7 7C ; ã×|||||||Lëÿ½³×|
000007d0h: 7C 7C 7C 7C 7C 7C 4C EB FF BD B3 97 7C 7C 7C 7C ; ||||||Lëÿ½³—||||
000007e0h: 7C 7C 7C 4C EB FF BD B3 D7 7C 7C 7C 7C 7C 7C 7C ; |||Lëÿ½³×|||||||
000007f0h: 4C EB FF BD F3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF ; Lëÿ½ó×|||||||Lëÿ
00000800h: BD B3 97 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD B3 D7 ; ½³—|||||||Lëÿ½³×
00000810h: 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD E3 D7 7C 7C 7C ; |||||||Lëÿ½ã×|||
00000820h: 7C 7C 7C 7C 4C EB FF BD F3 97 7C 7C 7C 7C 7C 7C ; ||||Lëÿ½ó—||||||
00000830h: 7C 4C EB FF BD E3 97 7C 7C 7C 7C 7C 7C 7C 4C EB ; |Lëÿ½ã—|||||||Lë
00000840h: FF BD B3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD F3 ; ÿ½³×|||||||Lëÿ½ó
00000850h: D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD F3 D7 7C 7C ; ×|||||||Lëÿ½ó×||
00000860h: 7C 7C 7C 7C 7C 4C EB FF BD B3 D7 7C 7C 7C 7C 7C ; |||||Lëÿ½³×|||||
00000870h: 7C 7C 4C EB FF BD F3 97 7C 7C 7C 7C 7C 7C 7C 4C ; ||Lëÿ½ó—|||||||L
00000880h: EB FF BD F3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD ; ëÿ½ó×|||||||Lëÿ½
00000890h: F3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD F3 97 7C ; ó×|||||||Lëÿ½ó—|
000008a0h: 7C 7C 7C 7C 7C 7C 4C EB FF BD F3 D7 7C 7C 7C 7C ; ||||||Lëÿ½ó×||||
000008b0h: 7C 7C 7C 4C EB FF BD B3 D7 7C 7C 7C 7C 7C 7C 7C ; |||Lëÿ½³×|||||||
000008c0h: 4C EB FF BD B3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF ; Lëÿ½³×|||||||Lëÿ
000008d0h: BD B3 97 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD B3 D7 ; ½³—|||||||Lëÿ½³×
000008e0h: 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD F3 D7 7C 7C 7C ; |||||||Lëÿ½ó×|||
000008f0h: 7C 7C 7C 7C 4C EB FF BD F3 D7 7C 7C 7C 7C 7C 7C ; ||||Lëÿ½ó×||||||
00000900h: 7C 4C EB FF BD B3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB ; |Lëÿ½³×|||||||Lë
00000910h: FF BD F3 97 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD F3 ; ÿ½ó—|||||||Lëÿ½ó
00000920h: D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD F3 D7 7C 7C ; ×|||||||Lëÿ½ó×||
00000930h: 7C 7C 7C 7C 7C 4C EB FF BD B3 D7 7C 7C 7C 7C 7C ; |||||Lëÿ½³×|||||
00000940h: 7C 7C 4C EB FF BD 63 97 7C 7C 7C 7C 7C 7C 7C 4C ; ||Lëÿ½c—|||||||L
00000950h: EB FF BD B3 97 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD ; ëÿ½³—|||||||Lëÿ½
00000960h: F3 97 7C 7C 7C 7C 7C 7C 7C 4C EB FF BD F3 D7 7C ; ó—|||||||Lëÿ½ó×|
00000970h: 7C 7C 7C 7C 7C 7C 4C EB FF BD B3 D7 7C 7C 7C 7C ; ||||||Lëÿ½³×||||
00000980h: 7C 7C 7C 4C EB FF BD F3 97 7C 7C 7C 7C 7C 7C 7C ; |||Lëÿ½ó—|||||||
00000990h: 4C EB FF BD B3 D7 7C 7C 7C 7C 7C 7C 7C 4C EB FF ; Lëÿ½³×|||||||Lëÿ
000009a0h: BD F3 F7 7C 7C 7C 7C 7C 7C 7C 4C FF FF BD F3 D7 ; ½ó÷|||||||Lÿÿ½ó×
000009b0h: 7C 7C 7C 7C 7C 7C 7C 4C FF FF BD F3 F7 7C 7C 7C ; |||||||Lÿÿ½ó÷|||
000009c0h: 7C 7C 7C 7C 4C FF FF BD F3 D7 7C 7C 7C 7C 7C 7C ; ||||Lÿÿ½ó×||||||
000009d0h: 7C 4C FF FF BD B3 D7 7C 7C 7C 7C 7C 7C 7C 4C FF ; |Lÿÿ½³×|||||||Lÿ
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00000da0h: 4C FF FF BD F3 D7 7C 7C 7C 7C 7C 7C 7C 4C FF FF ; Lÿÿ½ó×|||||||Lÿÿ
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00000fb0h: 7C 7C 7C                                        ; |||
So,
Is it an Audacity problem because it does not interpret DTX frames? What player would be able to play it else correctly?
Is my AMR file wrong?
Regards
Solución
I found out that my file was correct.
Problem is Audacity and all the other players.
The solution is to use the reference codec found here to decode the created amr file:
http://www.3gpp.org/ftp/Specs/html-info/26-series.htm
for AMR-WB it would be e.g. TS26.173
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