Re: [libdv-dev] dv_decode_full_frame

[salsaman <sal...@gm...>]

On Mon, Oct 6, 2008 at 7:41 PM, salsaman <sal...@gm...> wrote:

>
>
> On Mon, Sep 22, 2008 at 2:40 PM, Dan Dennedy <da...@de...> wrote:
>
>> On Mon, Sep 22, 2008 at 10:08 AM, salsaman <sal...@gm...> wrote:
>> > OK, thanks. Actually I already figured most of this out while I was
>> waiting
>> > for a reply !
>> >
>> > Now I would like to know how to get the audio values (rate, channels,
>> sample
>> > size, signedness and endianness).
>>
>> Please see the source code of playdv, kino, MLT, gstreamer, or other
>> users of libdv.
>>
>
> Thanks for the advice, but I was hoping for a bit less cryptic answer !
>
> What I found was generally:
> - read in a full frame
> - call dv_parse_audio_header()
> - use functions like dv_get_frequency()
>
> However, a couple of things:
>
> - dv_parse_audio_header() appears to be in libdv and working, however it is
> not defined in the header file.
> - there do not seem to be functions to get the signedness, endianess or
> interleaf (interleaved/non-interleaved) for the audio. Are these values
> fixed in the dv standard ?
>

+ 1 other point, I was presuming that dv_get_samples() would return the
sample size in bits, however it appears to return the number of samples per
frame (which can of course be calculated as frequency/fps, so not very
useful).

Should one assume that there are 16 bits per sample (or 20, 24 or 32).

Sorry if my questions appear stupid, but I know nothing about dv format - I
am approaching it from simply a programmatical point of view.




>
> Thanks in advance for any help, it is much appreciated.
>
> Gabriel.
> http://lives.sourceforge.net
>
>