On Wed, Oct 18, 2017 at 15:56:17 +0000, ganesh.ire...@syda.org wrote: > The following command seems to execute fine with no perceptible loss in audio > sync but there is a warning issued: [swscaler @ 0x7ffc8a823800] Warning: data > is not aligned! This can lead to a speedloss. > What is causing it and how can I eliminate it?
It means that one of the input or output dimensions when scaling is not multiple of 16. Thereby, the accelerated scaling code (e.g. via MMX or SSE) will not behave in an optimal manner (i.e. may be slower). IMHO, it's nothing you should worry about nor anything you would do something about. It does sometimes hint at another issue: If the final dimensions aren't multiples of 8, 16, 32 (depending on codec), the codec may behave suboptimally. So you need to choose your target size wisely sometimes. This is not an issue in your quoted case though. > ffmpeg version 3.1.1-tessus Copyright (c) 2000-2016 the FFmpeg developers This version is quite old. If you use a newer one, one of your other warnings will go away, namely this one: > [mp4 @ 0x7ffc8b026800] Using AVStream.codec to pass codec parameters to > muxers is deprecated, use AVStream.codecpar instead. Cheers, Moritz > This e-mail (including any attachments) is intended only for use by > the addressee(s) named herein and may contain legally privileged > and/or confidential information. I feel privileged now! :-) (We are all addressees, alas.) _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
