[libdv-dev] 12bit audio bleep still NOT FIXED

[Stefan L. <Ste...@sn...>]

Hi
I've got a bit deeper into this problem, and it seems to be a more
serious thing.

In my sample files where these beeps occure there are, when beeps happen,
9 consecutive audio blocks filled with 0x800 (2048). In 16bit recording mode
value 0x8000 indicates an error and should be replaced by 0x8001.

One sequence with 1508 frames has 2 beeps. From header information there
should be 1930308 samples (most frames with 1280 samples some with 1281).
But 2 beeps means that there are
 2 * 9 * (72bytes / (2channels * 1.5 bytesPerSample)) = 432 samples
missing or filled with invalid values.
1508 frames / 25 FramesPerSecond at 32000 Hz would require 1930240.

Found samples ((1930308 - 432) * 25 FramesPerSecond) / 1508 frames
= 31993.97 Hz.

So does that mean we may not trust the given value of samples per frame ?
Do we need a on the fly resamlper to adjust such differences for playing ?


-- 

mfg

  Stefan Lucke (Ste...@ep...)