AC3 (fixed) 48kHz 24bits 5.1 export is very super slow

Hi,

anyone noticed this?

I have to export to .w64 (48k 24bits 5.1) and then (with ffmpeg via Windows Console) export to ac3 (48k 24bits 5.1)

2h 31m movie --> 2h+ audio encoding time via Voukoder... (no video transcoding)

ffmpeg encoding (1m 44s encoding time):

Input #0, w64, from 'audio.w64':
 Duration: 02:30:54.11, bitrate: 6912 kb/s
 Stream #0:0: Audio: pcm_s24le ([1][0][0][0] / 0x0001), 48000 Hz, 5.1, s32 (24 bit), 6912 kb/s
Stream mapping:
 Stream #0:0 -> #0:0 (pcm_s24le (native) -> ac3 (native))
Press [q] to stop, [?] for help
Output #0, ac3, to 'audio.ac3':
 Metadata:
   encoder         : Lavf61.7.100
 Stream #0:0: Audio: ac3, 48000 Hz, 5.1, fltp, 448 kb/s
     Metadata:
       encoder         : Lavc61.19.101 ac3
[out#0/ac3 @ 0000013acc2de040] video:0KiB audio:495147KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: 0.000000%
size=  495147KiB time=02:30:54.09 bitrate= 448.0kbits/s speed=87.1x

Thanks!

PS

my project has an audio mix btw: a group of 6 tracks (for 5.1) and another track with several Stereo clips.

Zitat von Vouk

What NLE are you using?

Magix Vegas Pro 20, sorry

Zitat von Vouk

I'll try to reproduce the issue. It shouldn't be like that.

1) take a 1h 30m ac3 5.1 file

2) with ffmpeg convert to flac 5.1

3) import in Vegas

4) try to export with Voukoder (ac3 5.1)