ffmpeg/avconv doesn't recognize -strict experimental

[Joel Roth <joelz@pobox.com>]

Dear List,

ffmpeg/avconv aborts even with -strict experimental when input 
file audio is encoded with AAC. Does the audio
*have* to be decoded? I was thinking there might
be some kind of pass-through option.

The behavior of ffmpeg and avconv appears to be
identical.

$ avconv -acodec aac -strict experimental -i "S3 D5 Irene.mov" -b 500k "S3 D5 Irene.m4v"
avconv version 0.8.5-6:0.8.5-1, Copyright (c) 2000-2012 the
Libav developers
  built on Jan 13 2013 12:05:48 with gcc 4.7.2
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'S3 D5 Irene.mov':
  Metadata:
    major_brand     : qt
    minor_version   : 537199360
    compatible_brands: qt
    creation_time   : 2012-06-22 13:23:05
  Duration: 00:23:33.81, start: 0.000000, bitrate: 614 kb/s
    Stream #0.0(eng): Video: h264 (Main), yuv420p, 640x480,
478 kb/s, 29.97 fps, 29.97 tbr, 2997 tbn, 5994 tbc
    Metadata:
      creation_time   : 2012-06-22 13:23:05
    Stream #0.1(eng): Audio: aac, 48000 Hz, stereo, s16, 130
kb/s
    Metadata:
      creation_time   : 2012-06-22 13:23:06
File 'S3 D5 Irene.m4v' already exists. Overwrite ? [y/N] y
[buffer @ 0x147c540] w:640 h:480 pixfmt:yuv420p
[libx264 @ 0x147ccc0] using cpu capabilities: MMX2 SSE2Fast
SSSE3 FastShuffle SSE4.2
[libx264 @ 0x147ccc0] profile Main, level 3.0
[libx264 @ 0x147ccc0] 264 - core 123 r2189 35cf912 -
H.264/MPEG-4 AVC codec - Copyleft 2003-2012 -
http://www.videolan.org/x264.html - options: cabac=1 ref=3
deblock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=1
psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1
trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1
chroma_qp_offset=-2 threads=6 sliced_threads=0 nr=0
decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0
bframes=3 b_pyramid=0 b_adapt=1 b_bias=0 direct=1 weightb=0
open_gop=1 weightp=2 keyint=250 keyint_min=25 scenecut=40
intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=500
ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4
ip_ratio=1.25 aq=1:1.00
encoder 'aac' is experimental and might produce bad results.
Add '-strict experimental' if you want to use it.

Regards,

Joel


-- 
Joel Roth