No audio when using libdv with PAL D-VHS

Anonymous — Sat, 03 Aug 2002 15:16:39 -0000

Raw DV files generated by libdv come out silent on
my PAL D-VHS deck.

There appears to be sound in the files, as playdv will
play and extract it,
but the D-VHS deck mutes when the signal is fed into
it. The video is OK.
As the D-VHS format natively supports stereo 48kHz
sound, I haven't tested
any of the 32kHz modes.

To demonstrate I've attatched two raw PAL DV files.
Video is the same
in both files and is probably irrelevant as libdv didn't
create it. For
these tests I'm using v0.98, but it's been the same
since at least
version 0.7 when I started using it.

Sound.dv was created by merging video and a 48kHz
stereo wav file in
Ulead Video Studio and then exporting a Type 1 DV
AVI. This was then
converted to raw DV by using dvavi. Sending this to
the D-VHS deck works.

NoSound.dv is the result of using insert_audio to
merge in the same wav
file with the above. Sending this to D-VHS gives video
but no sound. You
get the same result if you export a Type 2 DV AVI and
run dvavi on that.

There's something in the way libdv encodes the audio
that the D-VHS deck
doesn't like, but I haven't been able to discover
exactly what the
critical difference is.

Recent changes to 29: No audio when using libdv with PAL D-VHS

No audio when using libdv with PAL D-VHS