[Cin] LPCM in DVD - 44.1/32khz sample rate?
Andrew Randrianasulu via Cin <[email protected]> Sun, 21 Jan 2024 05:43:57 +0300
| Newsgroups | gmane.comp.video.cinelerra-cv.general,gmane.comp.video.ffmpeg.user,gmane.comp.video.mjpeg.user |
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| Message-ID | <CA+rFky5pNGoR2NeKkWpZS4i8dJvMpW2pXa1uqCeBFwyRxKAt2g@mail.gmail.com> |
According to this source (vlc) lpcm dvd audio supports lower frequencies like 44100/32000 hz - useful for direct dv transcoding for example .... https://github.com/videolan/vlc/blob/master/modules/codec/lpcm.c see lines 524, 608 Does this mean that libavcodec/pcm-dvdenc.c can be trivially extended to support those ? Same question for mplex. (it only supports 48/96 khz lpcm audio). I also found this table via mjpeg-users archives: https://dvd.sourceforge.net/dvdinfo/lpcm.html it lists dynamic range/gain (?) setting equations. Not mplex nor ffmpeg support setting this to anything but hardcoded 0x80 This might be source of my "too loud" lpcm dvd experiments because I was making lpcm file via cinelerra-gg's raw pcm output format (using libsndfile internally). -- Cin mailing list [email protected] https://lists.cinelerra-gg.org/mailman/listinfo/cin