km at mathcs
Sep 3, 2007, 8:42 AM
Views: 723
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mythcommflag gets mpeg2video errors not seen in playback
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mythcommflag gives a large number of
[mpeg2video @ 0xb73ddb68]current_picture not initalized
2007-09-03 11:09:32.693 AFD Error: Unknown decoding error
on firewire streams captured on a comcast cable box. The commerical
marking on these streams are very unreliable, clearly the time offsets
generated are out of sync with the video playback. These particular
streams are from extended basic sd digital channels (fx,usa, comedy
central, ..) which are encrypted. However, the firewire captured mpeg
transport streams play perfectly well in myth. OTA streams captured in
the same way don't seem to have this problem.
My thought is that mythcommflag is not using the same codec as the myth
native player. Here is some comparative output
From mythfrontend
2007-09-03 11:19:50.195 AFD: Stream #0, has id 0x2240 codec id
MPEG2VIDEO, type Video, bitrate 15000000 at 0x0x884a910
2007-09-03 11:19:50.196 detectInterlace(Detect Scan, Interlaced Scan,
29.97, 480) ->Interlaced Scan
2007-09-03 11:19:50.196 AFD: Looking for decoder for MPEG2VIDEO
2007-09-03 11:19:50.196 AFD: Opened codec 0x8b24860, id(MPEG2VIDEO)
type(Video)
From mythcommflag
2007-09-03 11:09:32.035 AFD: Stream #0, has id 0x2240 codec id
MPEG2VIDEO, type Video, bitrate 15000000 at 0x0x81ff890
2007-09-03 11:09:32.037 detectInterlace(Detect Scan, Interlaced Scan,
29.97, 480) ->Interlaced Scan
2007-09-03 11:09:32.037 AFD: Looking for decoder for MPEG2VIDEO
2007-09-03 11:09:32.037 AFD: Opened codec 0x81ff990, id(MPEG2VIDEO)
type(Video)
What strikes me is that mythfrontend sees 0x0x884a910 and opens codec
0x8b24860.
mythcommflag sees 0x0x81ff890 and opens codec 0x81ff990.
I have to admit I don't understand the hex values. Are they just memory
addresses where the codecs are loaded, or are they absolute id numbers?
Is it significant that mythfrontend has two different hex values, and
mythcommflag has the same on detect and open?
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mythcommflag gets mpeg2video errors not seen in playback
