On 7/16/19, Paul B Mahol <one...@gmail.com> wrote: > On 7/16/19, Reino Wijnsma <rwijn...@xs4all.nl> wrote: >> On 16-7-2019 15:36, Paul B Mahol <one...@gmail.com> wrote: >>> On 7/16/19, Reino Wijnsma <rwijn...@xs4all.nl> wrote: >>>> About 7 years ago I've used Audacity to assemble the soundtrack of the >>>> videogame No One Lives Forever 2. See >>>> https://www.youtube.com/watch?v=4Y3aKcQ0HK4 for example. >>> Why you use adelay? >>> Perhaps you want acrossfade filter instead, or even better concat >>> filter. >> I can't use these filters. Have a look at the Youtube video please. >> I wish it was a simple matter of just concatenating all segments, but it >> isn't, because the segments don't align perfectly. >> Each segments has to start at a very specific time. >> Then it's a matter of mixing everything at full volume(!), so there's no >> fading involved at all. > > acrossfade can just join it with nofade curve, which basically disables > fading. > >> >> Do you happen to know why ffmpeg reports a completely wrong duration? >> >> Related question/suggestion: >> It's really cumbersome to always having to specify the delay for all(!) >> channels: [1]adelay=158792S|158792S[E2]; >> How about a default behaviour where specifying an amount of >> milliseconds/samples once(!) applies to all channels: >> [1]adelay=158792S[E2]; >> And if you want a specific delay for another channel, then you can do so >> as >> is already possible. >> This would make my commandline a lot shorter! > > The thing with amix is that by reducing volume by mixing and adding it > back with volume, > you basically loose quality. It is more obvious with float sample > format then double one. > > Option could be added to amix filter to just sum samples as is. > > Also what ffmpeg version you are using? >
Actually ffmpeg is behaving correctly, your [29]adelay is missing one S. _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
