[Cin] ffmpeg's e-ac3 encoder

[Terje J. Hanssen]

Den 24.11.2021 03:47, skrev Andrew Randrianasulu via Cin:
> according to some tests it works, but some hw decoders (in tv) migh 
> refuse stream (
>
> https://www.reddit.com/r/ffmpeg/comments/k3z9i9/how_bad_is_ffmpegs_eac3_encoder/ 
> <https://www.reddit.com/r/ffmpeg/comments/k3z9i9/how_bad_is_ffmpegs_eac3_encoder/>
>
> it also does not support more than 6 channels
> https://trac.ffmpeg.org/ticket/3595?cversion=0&cnum_hist=7 
> <https://trac.ffmpeg.org/ticket/3595?cversion=0&cnum_hist=7>
>
> command line and bitrates possible here:
> https://ffmpeg-user.ffmpeg.narkive.com/JJ0ohMKA/eac3-encoding 
> <https://ffmpeg-user.ffmpeg.narkive.com/JJ0ohMKA/eac3-encoding>
>  -acodec eac3, up to 6 mbps...
>
> testing should be as simple as copying ffmpeg/audio ac3 profile with 
> new name and replacing ac3 with eac3
>
>


I've tested to convert MP2 audio to AC3, E-AC3 and AAC respectively with 
default bit rate in my remuxed "HDV.m2ts" file for Blu-ray

Stream #0:1[0x1100]: Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, 
fltp, 192 kb/s
Stream #0:1[0x1100]: Audio: eac3 (EAC3 / 0x33434145), 48000 Hz, stereo, 
fltp, 192 kb/s
Stream #0:1[0x1100]: Audio: aac (LC) ([6][0][0][0] / 0x0006), 48000 Hz, 
stereo, fltp, 128 kb/s

Re. aac, ffmpeg reported:
[mpegts @ 0x5620ca0a9580]
Stream 1, codec aac, is muxed as a private data stream and may not be 
recognized upon reading.

Playback with VLC and and Gnome Videos movieplayer (Totem) was ok for 
AC3 and E-AC3
No audio for AAC.

I think I go for E-AC3 for "HDV.m2ts with re-encoded audio" on Blu-ray discs
https://trac.ffmpeg.org/wiki/Encode/HighQualityAudio
https://en.wikipedia.org/wiki/Comparison_of_high-definition_optical_disc_formats#Technical_details

Terje J. H





-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.cinelerra-gg.org/pipermail/cin/attachments/20211124/289fa348/attachment.htm>