[FFmpeg-trac] #5122(undetermined:new): First audio packet is always corrupted when parsing PCM

FFmpeg trac at avcodec.org
Tue Jan 5 14:25:42 CET 2016


#5122: First audio packet is always corrupted when parsing PCM
-------------------------------------+-------------------------------------
             Reporter:               |                    Owner:
  marcel_poelstra                    |                   Status:  new
                 Type:  defect       |                Component:
             Priority:  normal       |  undetermined
              Version:  git-master   |               Resolution:
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by marcel_poelstra):

 Replying to [comment:5 cehoyos]:

 Of course the payload is the same.... that is not the issue.  Please have
 a look at the screenshots I sent from the analyzer. Not only the payload,
 but the container should be OK as well !



 > The input file and the output file contain identical audio data, just
 look at the files with a hexeditor after cutting the beginning of the file
 until the "data" tag.
 >
 > Why do you believe the output file is different?
 >
 > {{{
 > 00000000  52 49 46 46 ac 6d 28 00  57 41 56 45 66 6d 74 20
 |RIFF.m(.WAVEfmt |
 > 00000010  10 00 00 00 01 00 01 00  44 ac 00 00 88 58 01 00
 |........D....X..|
 > 00000020  02 00 10 00 64 61 74 61  f0 5f 28 00 00 00 8c 05
 |....data._(.....|
 > 00000030  13 0b 8e 10 fa 15 4e 1b  87 20 a0 25 92 2a 5a 2f  |......N..
 .%.*Z/|
 > 00000040  f2 33 57 38 81 3c 71 40  1e 44 87 47 a9 4a 7e 4d
 |.3W8.<q at .D.G.J~M|
 > 00000050  07 50 3f 52 23 54 b3 55  ee 56 d1 57 5b 58 8d 58
 |.P?R#T.U.V.W[X.X|
 > 00000060  66 58 e5 57 0c 57 db 55  55 54 7a 52 4b 50 cc 4d
 |fX.W.W.UUTzRKP.M|
 > 00000070  ff 4a e6 47 85 44 de 40  f7 3c d3 38 75 34 e3 2f
 |.J.G.D. at .<.8u4./|
 > 00000080  20 2b 31 26 1d 21 e7 1b  95 16 2c 11 b2 0b 2e 06  |
 +1&.!....,.....|
 > 00000090  a1 00 15 fb 8d f5 10 f0  a3 ea 4c e5 10 e0 f3 da
 |..........L.....|
 > 000000a0  fc d5 2f d1 91 cc 27 c8  f5 c3 ff bf 4a bc d9 b8
 |../...'.....J...|
 > 000000b0  af b5 d0 b2 3f b0 fd ad  10 ac 75 aa 31 a9 44 a8
 |....?.....u.1.D.|
 > 000000c0  b0 a7 74 a7 91 a7 08 a8  d6 a8 fd a9 7a ab 4c ad
 |..t.........z.L.|
 > 000000d0  71 af e7 b1 ab b4 bd b7  15 bb b4 be 94 c2 b2 c6
 |q...............|
 > 000000e0  0a cb 96 cf 54 d4 3e d9  4e de 80 e3 cf e8 36 ee
 |....T.>.N.....6.|
 > 000000f0  ad f3 32 f9 be fe 49 04  d2 09 50 0f c0 14 1a 1a
 |..2...I...P.....|
 > }}}
 > {{{
 > 00000000  52 49 46 46 36 60 28 00  57 41 56 45 66 6d 74 20
 |RIFF6`(.WAVEfmt |
 > 00000010  10 00 00 00 01 00 01 00  44 ac 00 00 88 58 01 00
 |........D....X..|
 > 00000020  02 00 10 00 4c 49 53 54  1a 00 00 00 49 4e 46 4f
 |....LIST....INFO|
 > 00000030  49 53 46 54 0e 00 00 00  4c 61 76 66 35 37 2e 32
 |ISFT....Lavf57.2|
 > 00000040  31 2e 31 30 30 00 64 61  74 61 f0 5f 28 00 00 00
 |1.100.data._(...|
 > 00000050  8c 05 13 0b 8e 10 fa 15  4e 1b 87 20 a0 25 92 2a  |........N..
 .%.*|
 > 00000060  5a 2f f2 33 57 38 81 3c  71 40 1e 44 87 47 a9 4a
 |Z/.3W8.<q at .D.G.J|
 > 00000070  7e 4d 07 50 3f 52 23 54  b3 55 ee 56 d1 57 5b 58
 |~M.P?R#T.U.V.W[X|
 > 00000080  8d 58 66 58 e5 57 0c 57  db 55 55 54 7a 52 4b 50
 |.XfX.W.W.UUTzRKP|
 > 00000090  cc 4d ff 4a e6 47 85 44  de 40 f7 3c d3 38 75 34
 |.M.J.G.D. at .<.8u4|
 > 000000a0  e3 2f 20 2b 31 26 1d 21  e7 1b 95 16 2c 11 b2 0b  |./
 +1&.!....,...|
 > 000000b0  2e 06 a1 00 15 fb 8d f5  10 f0 a3 ea 4c e5 10 e0
 |............L...|
 > 000000c0  f3 da fc d5 2f d1 91 cc  27 c8 f5 c3 ff bf 4a bc
 |..../...'.....J.|
 > 000000d0  d9 b8 af b5 d0 b2 3f b0  fd ad 10 ac 75 aa 31 a9
 |......?.....u.1.|
 > 000000e0  44 a8 b0 a7 74 a7 91 a7  08 a8 d6 a8 fd a9 7a ab
 |D...t.........z.|
 > 000000f0  4c ad 71 af e7 b1 ab b4  bd b7 15 bb b4 be 94 c2
 |L.q.............|
 > }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/5122#comment:8>
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