[FFmpeg-trac] #7693(undetermined:closed): ffmpeg down-samples PCR on codec copy

[FFmpeg]

#7693: ffmpeg down-samples PCR on codec copy
-------------------------------------+-------------------------------------
             Reporter:  gstair       |                    Owner:
                 Type:  defect       |                   Status:  closed
             Priority:  normal       |                Component:
              Version:  unspecified  |  undetermined
             Keywords:               |               Resolution:  invalid
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
-------------------------------------+-------------------------------------

Comment (by gstair):

 Specifying -muxrate and -pcr_period does not change the rate of the PCR.

 Original PCR:
 PCR (s): 1.0
 PCR (s): 1.147
 PCR (s): 1.194
 PCR (s): 1.245
 PCR (s): 1.292
 PCR (s): 1.34
 PCR (s): 1.382
 PCR (s): 1.428
 PCR (s): 1.477
 PCR (s): 1.525
 PCR (s): 1.567
 PCR (s): 1.612
 PCR (s): 1.661
 PCR (s): 1.711
 PCR (s): 1.756
 PCR (s): 1.803
 PCR (s): 1.853
 PCR (s): 1.903
 PCR (s): 1.953
 PCR (s): 2.009
 PCR (s): 2.058
 PCR (s): 2.103
 PCR (s): 2.149
 PCR (s): 2.199
 PCR (s): 2.246
 PCR (s): 2.292
 PCR (s): 2.338
 PCR (s): 2.39
 PCR (s): 2.432
 PCR (s): 2.478
 PCR (s): 2.519
 PCR (s): 2.562
 PCR (s): 2.606
 PCR (s): 2.655
 PCR (s): 2.705
 PCR (s): 2.75
 PCR (s): 2.797
 PCR (s): 2.841
 PCR (s): 2.884
 PCR (s): 2.929
 PCR (s): 2.979
 PCR (s): 3.029
 PCR (s): 3.077
 PCR (s): 3.133
 PCR (s): 3.184
 PCR (s): 3.234
 PCR (s): 3.286
 PCR (s): 3.337
 PCR (s): 3.392
 PCR (s): 3.443
 PCR (s): 3.496
 PCR (s): 3.542
 PCR (s): 3.59
 PCR (s): 3.651
 PCR (s): 3.697
 PCR (s): 3.744
 PCR (s): 3.794
 PCR (s): 3.842
 PCR (s): 3.893
 PCR (s): 3.949
 PCR (s): 4.013
 PCR (s): 4.054
 PCR (s): 4.096

 etc.

 ffmpeg -i .\Original_100ms_PCR.ts -map 0 -f mpegts -c: copy -muxrate 10M
 -pcr_period 100 .\ReBroadcasted_1100ms_PCR.ts

 New PCR:
 PCR (s): 0.7004555555555556
 PCR (s): 1.9460666666666666
 PCR (s): 3.096477777777778
 PCR (s): 4.238611111111111
 PCR (s): 5.393088888888889
 PCR (s): 6.608011111111111
 PCR (s): 7.705033333333334

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Ticket URL: <https://trac.ffmpeg.org/ticket/7693#comment:6>
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