reidjr at btconnect
Jun 23, 2007, 4:16 PM
Post #1 of 1
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CalcReadAheadThresh always the same. Bug or feature ?
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I have been trying to trace down problems with playing BBC HD, and came
across the following behavior. I was trying to find out if the BBC
bitrate being reported / picked up wrong was the problem, and noticed
the behavior below.
Behavior is the same in SVN 13502 13528 and 13755.
BBC1 - SD
Input #0, mpegts, from 'myth://192.168.254.4:6543/17306_20070623235642.mpg':
Duration: N/A, bitrate: 15256 kb/s
Stream #0.0[0x91a], 1/90000: Video: mpeg2video, yuv420p, 720x576,
1/25, 15000 kb/s, 25.00 fps(r)
Stream #0.1[0x91b](eng), 1/90000: Audio: mp2, 48000 Hz, stereo, 256 kb/s
Stream #0.2[0x91c](eng), 1/90000: Data: 0x0000
2007-06-23 23:56:43.378
RingBuf(myth://192.168.254.4:6543/17306_20070623235642.mpg):
CalcReadAheadThresh(3063884464 KB)
-> threshhold(64 KB) min read(0 KB) blk size(32 KB)
Astra HD
Input #0, mpegts, from 'myth://192.168.254.4:6543/64003_20070624000216.mpg':
Duration: N/A, bitrate: 22255 kb/s
Stream #0.0[0x85], 1/90000: Video: mpeg2video, yuv420p, 1920x1088,
1/25, 21999 kb/s, 25.00 fps(r)
Stream #0.1[0x86](eng), 1/90000: Audio: mp2, 48000 Hz, stereo, 256 kb/s
2007-06-24 00:02:22.593
RingBuf(myth://192.168.254.4:6543/64003_20070624000216.mpg):
CalcReadAheadThresh(3063884464 KB)
-> threshhold(64 KB) min read(0 KB) blk size(32 KB)
BBC HD (Also reports wrong rawbitrate)
Input #0, mpegts, from 'myth://192.168.254.4:6543/13940_20070624000309.mpg':
Duration: N/A, bitrate: 640 kb/s
Stream #0.0[0x90e], 1/90000: Video: h264, yuv420p, 1440x1080, 1/25,
500 kb/s, 25.00 fps(r)
Stream #0.1[0x910](NAR), 1/90000: Audio: mp2, 48000 Hz, stereo, 256 kb/s
Stream #0.2[0x911](eng), 1/90000: Data: 0x0000
Stream #0.3[0x90f](eng), 1/90000: Audio: ac3, 48000 Hz, stereo, 384 kb/s
2007-06-24 00:03:22.318
RingBuf(myth://192.168.254.4:6543/13940_20070624000309.mpg):
CalcReadAheadThresh(3063884464 KB)
-> threshhold(64 KB) min read(0 KB) blk size(32 KB)
Is the estbitrate / rawbitrate wrong, or is this setting of the
threshold irrelevent to the setting of the buffer. I had assumed the
buffering to increase with bitrate from looking at the code and the list
archives ?
John
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