On 3/27/13, Brad O'Hearne <[email protected]> wrote: > In lieu of having no luck over several weeks getting video + audio samples > captured from QTKit resampled and encoded with Libav to FLV (with video), > I've kind of hit a bit of a brick wall. The runnable Mac app and source > demonstrating this use case hasn't apparently shed any light on why the > audio being encoded is junk. While my gut all along has been that there's > something relatively simple at work, perhaps a pointer problem or something, > at the same time I've been over this fairly modest section of code so many > times I'm not sure what more to try. > > Again, my use case: > > QTKit capture (audio / video) -> convert (video)/resample (audio) -> encode > to FLV -> output (file or network stream) > > Up to this point, I've assumed all of the problem was in my code. I still > don't doubt that is likely the case, but given no headway looking for the > problem there, or to whatever degree anyone else has taken a look at the > sample app I provided it also hasn't rendered any real headway, I started > looking in other media libraries which either depend or appear to partially > depend on Libav. Basically what appears to be the case is that they don't > use Libav on the other side of QTKit capture, so as of now, I am not aware > of any example which is publicly available demonstrating that this has been > done. > > So at this point, it seems a decent question to consider if maybe the > problem lies in Libav. I think there's a pretty simple question to ask: has > a QTSampleBuffer ever been used to fill a sample array, resampled, and > encoded to FLV? -- i.e. does anyone actually know if this works? If so, I > would be much obliged if you could direct me to the unit test or code > example which demonstrates this, and I should be able to figure out what > deficiency exists in my code. If such a unit test or code example does *not* > exist, then I guess a question for the maintainers -- what do you think the > chances are that there's a bug somewhere in either resampling or the > adpcm_swf codec that could be affecting audio? > > Thanks, I greatly appreciate it.
Provide raw output given by QTKit whatever, and I'm sure someone will give you solution for your problem. > > Brad > > > _______________________________________________ > Libav-user mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/libav-user > _______________________________________________ Libav-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/libav-user
