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

[Alex Converse]

On Fri, Nov 21, 2008 at 11:30 AM, Robert Swain <robert.swain at gmail.com> wrote:
> 2008/11/21 Alex Converse <alex.converse at gmail.com>:
>> 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.
>
> Good point. Just looking for some files encoded with Main profile with
> which I can test, though I expect you have tested it thoroughly.
>

Try the am##_## series from
http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_IEC_14496-4_2004_Conformance_Testing/audio_conformance/mpeg4audio-conformance/compressedMp4/

--Alex