On Fri, Sep 08, 2017 at 09:34:50AM +0200, Paul B Mahol wrote: > On 9/8/17, Mike Brown <[email protected]> wrote: > > On Fri, Sep 08, 2017 at 12:54:12AM +0200, Carl Eugen Hoyos wrote: > >> (Sorry, my knowledge of SMPTE 337M is limited but I know that so far, > >> this is the only "format" for which FFmpeg supports Dolby-E, and that > >> adding support for other formats will be possible but hasn't been > >> done yet.) > > > > From what I understand, reading the synopsis of SMPTE-337M, is that it is > > not a container specifically for Dolby-E. I couldn't anything out of it to > > indicate that it can even handle Dolby-E. > > > > That said, I do deal with SMPTE-302M, which is the spec for which Dolby-E is > > applied to Transport Streams. In my case satellite feeds (not for the > > consumer). The spec talks about MPEG-2 TS streams, but it applies to H.264 > > streams as well. > > > > Right now, I use ffmpeg to extract the stream into a 2-ch WAVE file, in > > which > > I use in another program to extract the audio into 6 mono WAVE files. I > > then > > use ffmpeg to encode a AC3 file. > > > > Are you saying that I can use ffmpeg and get to a final ac3 file in a single > > step? > > No, you would need to copy audio to raw container, this raw container would be > then detected as Dolby-E. > > ffmpeg -i input.wav -c:a copy -f u8 out.u8 > > ffmpeg -i out.u8 -c:a ac3 .....
Could this not be done as a series of pipes: ffmpeg -i input.ts -map 0:2 -c:a pcm_s24le -f wav - | \ ffmpeg -i - -c:a copy -f u24le - | \ ffmpeg -drc_scale 0 -i - -c:a ac3 -ab 640k -center_mixlev 0.707 output.ac3 Will the 5.1 audio be mapped correctly? The Dolby-E is 24bit, not 8. MB -- e-mail: [email protected] | [email protected] /~\ The ASCII [email protected] (140 char limit) \ / Ribbon Campaign Visit - URL: http://vidiot.com/ X Against http://vidiot.net/ / \ HTML Email "You're Sherlock Holmes, wear the damn hat!" - Watson to Sherlock Sherlock - The Abominable Bride - 1/01/16 _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
