[FFmpeg-devel] AAC-Main (round 2)

Alex Converse alex.converse
Fri Nov 21 17:15:01 CET 2008

On Fri, Nov 21, 2008 at 10:51 AM, Robert Swain <robert.swain at gmail.com> wrote:
> 2008/11/19 Alex Converse <alex.converse at gmail.com>:
>> I split these off into a separate patch based on Rob's suggestion.
>> +            } else if (ac->m4ac.object_type == AOT_AAC_LC) {
>> +                av_log(ac->avccontext, AV_LOG_ERROR, "Prediction is not allowed in AAC-LC.\n");
>> +                memset(ics, 0, sizeof(IndividualChannelStream));
>> +                return -1;
> Is this purely for informative reasons or have you encountered some LC
> streams with the predictor_present bit set? This case doesn't exist in
> the specs I have though I know it should not be allowed as prediction
> is not in LC.

I put that there because if the predictor bit is set in an LC stream
then there is no sane assumption I can think of about the data that
directly follows it.



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