On Wed, Apr 9, 2014 at 2:02 PM, Gyula Hatalyák <[email protected]> wrote: > Hi! > > I would like to ask from which version of ffmpeg is built-in AAC encoding > reliable?
Tip is not reliable yet, but there is a patch[0][1] that makes it quite reliable. Beware, though, that patch makes M/S auto-encoding the default, and it still has some bugs. You need to specify -stereo_mode off (or maybe, just maybe -stereo_mode on is enough to keep the bugs out). I'm pretty sure -stereo_mode off is as stable as you can get (I've encoded hours and hours and no artifacts there), but it's less efficient than many other implementations - due to precisely M/S coding being off. > Is it still in experimental state? It's not for me to decide, but I hope after that patch becomes final and stable enough, it will stop being so. > What fixes happened recently? The patch addresses bugs in rate control, bit allocation at high bit rates, M/S encoding bugs, bit allocation efficiency in general, clipping due to quantization noise, and implements VBR encoding. > Should I use libvo codec instead? > Which is recommended? While the mentioned patch improves things a lot (and IMHO it's better than FAAC at least), in the short term I'd still suggest not using it for productive purposes. [0] https://trac.ffmpeg.org/ticket/2686 [1] https://trac.ffmpeg.org/attachment/ticket/2686/aac-improvements-wip-v8.patch _______________________________________________ Libav-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/libav-user
