Convertir .flv en .mp3 sous ubuntu

Avec ffmpeg :

ffmpeg -i fichier.flv -f mp3 -vn -acodec copy fichier.mp3

bonjour,
bien sur , mais faut encore un lecteur mp3 qui lise l'ogg
perso j'en ai un, mais ce n'est surement pas le cas de tout le monde , ils sont bien rare.
a+

Merci pour la réponse rapide,
Alors ça donne : fichier.flv: Macromedia Flash Video

Ce que je veux faire c'est convertir un fichier .flv récupéré sur youtube par mon dossier "temp" dans mon "système de fichier" et le convertir en .mp3 en enlevant la vidéo qui y est attaché afin de pouvoir écouter la musique du fichier sur un lecteur mp3 . J'ai déjà fait cette manipulation à de nombreuse reprise avec succès, mais maintenant à la place d'activer le processus d'encodage il me marque :
[flv @ 0xb7ec54c8]Unsupported video codec (7)
[flv @ 0xb7ec54c8]Unsupported video codec (7)
[flv @ 0xb7ec54c8]Unsupported video codec (7)
[flv @ 0xb7ec54c8]Unsupported video codec (7)
..... beaucoup de fois.
et fini par
size= 1741kB time=207.9 bitrate= 68.6kbits/s
video:0kB audio:1741kB global headers:0kB muxing overhead 0.000000%

La commande que je tape est ceci :
ffmpeg -i "FlashlJAX7h" -vn -acodec copy "musique".mp3

un fichier mp3 dont totem/ vlc ou songbird disent "erreur impossible de déterminer le flux" pour totem, ce fichier apparait dans le dossier de destination et fait la taille de 1.7 Mo. mais impossible de le lire...

Je ne sais pas comment être plus précis, avant il ne faisait pas ça : [flv @ 0xb7ec54c8]Unsupported video codec (7) et je ne sais pas comment régler ce problème.

Merci

je veux bien avoir explication a cette commande ou bien un logiciel qui le fais

bonjour,
j'ai deja donner le lien vers un ch'ti programme qui vous fait cela , a partir de ffmpg
http://www.bytessence.com/bmpxc.html
comme ça pas besoin de se casser la tête .
a+
ps: pense à récupère le fichier langue français (c'est bibi qui la fait)

Et tant qu'à faire, mieux vaut encoder en Ogg Vorbis.

Bonjour,
j'utilisais cette méthode ffmpeg -i "fichier.flv" -f mp3 -vn -acodec copy "fichier.mp3"
mais maintenant j'ai un problème lorsque je veux faire cette conversion .flv en .mp3, il me sort :
[flv @ 0xb80574c8]Unsupported video codec (7)
tout le long et résultat le fichier final est illisible.
Quelqu'un saurait-il comment régler ce problème ?
Merci

et la commande ffmpeg -h ?

et me donner uniquement les résultats indiqués ci-dessous :

redfox@mandriva[192.168.1.2]:~$ ffmpeg -h
FFmpeg version SVN-r11599, Copyright (c) 2000-2008 Fabrice Bellard, et al.
  configuration: --prefix=/usr --enable-shared --libdir=/usr/lib --enable-liba52 --enable-pp --enable-gpl --enable-pthreads --enable-libnut --enable-libtheora --enable-libvorbis --enable-x11grab --enable-dirac --enable-libmp3lame --enable-libfaad --enable-libfaac --enable-libx264 --enable-libxvid --enable-libamr_nb --enable-libamr_wb
  libavutil version: 49.6.0
  libavcodec version: 51.49.0
  libavformat version: 52.5.0
  libavdevice version: 52.0.0
  built on Jan 16 2009 00:52:59, gcc: 4.2.3 (4.2.3-6mnb1)

Je n'obtiens pas celà en faisant ffmpeg -h, nul part apparait configuration : --prefix/usr ... seulement une longue liste commençant comme celà :
-timestamp time set the timestamp
-author string set the author
-copyright string set the copyright
-comment string set the comment
-genre string set the genre
-album string set the album
-v verbose control amount of logging
-target type specify target file type ("vcd", "svcd", "dvd", "dv", "dv50", "pal-vcd", "ntsc-svcd", ...)

et finissant par :

-timestamp time set the timestamp
-author string set the author
-copyright string set the copyright
-comment string set the comment
-genre string set the genre
-album string set the album
-v verbose control amount of logging
-target type specify target file type ("vcd", "svcd", "dvd", "dv", "dv50", "pal-vcd", "ntsc-svcd", ...)

par ailleurs je ne peux pas remonter jusqu'à ma commande ffmpeg -h...

tu fais alors comme ceci :

ffmpeg -h | less

puis tu tapes sur le clavier la lettre " q ".

tu obtiendras le résultat ...

Il me met ça et quand je fait "q" il reviens comme si je n'avait pas fit ffmpeg -h | less

usage: ffmpeg [[infile options] -i infile]... {[outfile options] outfile}...
Hyper fast Audio and Video encoder

Main options:
-L show license
-h show help
-version show version
-formats show available formats, codecs, protocols, ...
-f fmt force format
-i filename input file name
-y overwrite output files
-t duration record or transcode "duration" seconds of audio/video
-fs limit_size set the limit file size in bytes
-ss time_off set the start time offset
-itsoffset time_off set the input ts offset
-title string set the title
-timestamp time set the timestamp
-author string set the author
-copyright string set the copyright
-comment string set the comment
-genre string set the genre
-album string set the album
-v verbose control amount of logging
-target type specify target file type ("vcd", "svcd", "dvd", "dv", "dv50", "pal-vcd", "ntsc-svcd", ...)
-dframes number set the number of data frames to record
-sn disable subtitle
-scodec codec force subtitle codec ('copy' to copy stream)

ha oui ! c'est vrai ! désolé !

bon ben : j'utilisais cette méthode ffmpeg -i "fichier.flv" -f mp3 -vn -acodec copy "fichier.mp3"

rebalance ta commande, tu devrais avoir accès à ce que je recherche ....

bizarre que tu n'arrives pas à accéder au début de la commande ffmpeg -h car j'y accède bien moi ....

tu veux que je refasse ffmpeg -i fichier...... ou ffmpeg -h ?
je te met l'intégral ffmpeg -h ?

merci de ton aide :)

A titre d'info je suis sur eeepc ubuntu easy peasy ... mais avant ça marchait bien cette commande je comprend pas pk y me fait ça...
ffmpeg -h donne ça :

-timestamp time set the timestamp
-author string set the author
-copyright string set the copyright
-comment string set the comment
-genre string set the genre
-album string set the album
-v verbose control amount of logging
-target type specify target file type ("vcd", "svcd", "dvd", "dv", "dv50", "pal-vcd", "ntsc-svcd", ...)
-dframes number set the number of data frames to record
-sn disable subtitle
-scodec codec force subtitle codec ('copy' to copy stream)
-newsubtitle add a new subtitle stream to the current output stream
-slang code set the ISO 639 language code (3 letters) of the current subtitle stream

Video options:
-b set bitrate (in bits/s)
-vb set bitrate (in bits/s)
-vframes number set the number of video frames to record
-r rate set frame rate (Hz value, fraction or abbreviation)
-s size set frame size (WxH or abbreviation)
-aspect aspect set aspect ratio (4:3, 16:9 or 1.3333, 1.7777)
-croptop size set top crop band size (in pixels)
-cropbottom size set bottom crop band size (in pixels)
-cropleft size set left crop band size (in pixels)
-cropright size set right crop band size (in pixels)
-padtop size set top pad band size (in pixels)
-padbottom size set bottom pad band size (in pixels)
-padleft size set left pad band size (in pixels)
-padright size set right pad band size (in pixels)
-padcolor color set color of pad bands (Hex 000000 thru FFFFFF)
-vn disable video
-vcodec codec force video codec ('copy' to copy stream)
-sameq use same video quality as source (implies VBR)
-pass n select the pass number (1 or 2)
-passlogfile file select two pass log file name
-newvideo add a new video stream to the current output stream

Advanced Video options:
-pix_fmt format set pixel format, 'list' as argument shows all the pixel formats supported
-intra use only intra frames
-vdt n discard threshold
-qscale q use fixed video quantizer scale (VBR)
-qdiff q max difference between the quantizer scale (VBR)
-rc_override override rate control override for specific intervals
-me_threshold motion estimaton threshold
-strict strictness how strictly to follow the standards
-deinterlace deinterlace pictures
-psnr calculate PSNR of compressed frames
-vstats dump video coding statistics to file
-vstats_file file dump video coding statistics to file
-vhook module insert video processing module
-intra_matrix matrix specify intra matrix coeffs
-inter_matrix matrix specify inter matrix coeffs
-top top=1/bottom=0/auto=-1 field first
-dc precision intra_dc_precision
-vtag fourcc/tag force video tag/fourcc
-qphist show QP histogram
-vbsf bitstream filter

Audio options:
-ab set bitrate (in bits/s)
-aframes number set the number of audio frames to record
-aq quality set audio quality (codec-specific)
-ar rate set audio sampling rate (in Hz)
-ac channels set number of audio channels
-an disable audio
-acodec codec force audio codec ('copy' to copy stream)
-vol volume change audio volume (256=normal)
-newaudio add a new audio stream to the current output stream
-alang code set the ISO 639 language code (3 letters) of the current audio stream

Advanced Audio options:
-atag fourcc/tag force audio tag/fourcc
-absf bitstream filter

Subtitle options:
-sn disable subtitle
-scodec codec force subtitle codec ('copy' to copy stream)
-newsubtitle add a new subtitle stream to the current output stream
-slang code set the ISO 639 language code (3 letters) of the current subtitle stream
-sbsf bitstream filter

Audio/Video grab options:
-vc channel set video grab channel (DV1394 only)
-tvstd standard set television standard (NTSC, PAL (SECAM))
-isync sync read on input

Advanced options:
-map file:stream[:syncfile:syncstream] set input stream mapping
-map_meta_data outfile:infile set meta data information of outfile from infile
-benchmark add timings for benchmarking
-dump dump each input packet
-hex when dumping packets, also dump the payload
-re read input at native frame rate
-loop_input loop (current only works with images)
-loop_output number of times to loop output in formats that support looping (0 loops forever)
-threads count thread count
-vsync video sync method
-async audio sync method
-adrift_threshold audio drift threshold
-vglobal video global header storage type
-copyts copy timestamps
-shortest finish encoding within shortest input
-dts_delta_threshold timestamp discontinuity delta threshold
-programid desired program number
-muxdelay seconds set the maximum demux-decode delay
-muxpreload seconds set the initial demux-decode delay
-sbsf bitstream filter
AVCodecContext AVOptions:
-b <int> E.V.. set bitrate (in bits/s)
-ab <int> E..A. set bitrate (in bits/s)
-bt <int> E.V.. set video bitrate tolerance (in bits/s)
-flags <flags> EDVA.
mv4 E.V.. use four motion vector by macroblock (mpeg4)
obmc E.V.. use overlapped block motion compensation (h263+)
qpel E.V.. use 1/4 pel motion compensation
loop E.V.. use loop filter
gmc E.V.. use gmc
mv0 E.V.. always try a mb with mv=<0,0>
part E.V.. use data partitioning
gray EDV.. only decode/encode grayscale
psnr E.V.. error[?] variables will be set during encoding
naq E.V.. normalize adaptive quantization
ildct E.V.. use interlaced dct
low_delay EDV.. force low delay
alt E.V.. enable alternate scantable (mpeg2/mpeg4)
trell E.V.. use trellis quantization
bitexact EDVAS use only bitexact stuff (except (i)dct)
aic E.V.. h263 advanced intra coding / mpeg4 ac prediction
umv E.V.. use unlimited motion vectors
cbp E.V.. use rate distortion optimization for cbp
qprd E.V.. use rate distortion optimization for qp selection
aiv E.V.. h263 alternative inter vlc
slice E.V..
ilme E.V.. interlaced motion estimation
scan_offset E.V.. will reserve space for svcd scan offset user data
cgop E.V.. closed gop
-me_method <int> E.V.. set motion estimation method
zero E.V.. zero motion estimation (fastest)
full E.V.. full motion estimation (slowest)
epzs E.V.. EPZS motion estimation (default)
log E.V.. log motion estimation
phods E.V.. phods motion estimation
x1 E.V.. X1 motion estimation
hex E.V.. hex motion estimation
umh E.V.. umh motion estimation
iter E.V.. iter motion estimation
-me <int> E.V.. set motion estimation method (deprecated, use me_method instead)
zero E.V.. zero motion estimation (fastest)
full E.V.. full motion estimation (slowest)
epzs E.V.. EPZS motion estimation (default)
log E.V.. log motion estimation
phods E.V.. phods motion estimation
x1 E.V.. X1 motion estimation
hex E.V.. hex motion estimation
umh E.V.. umh motion estimation
iter E.V.. iter motion estimation
-g <int> E.V.. set the group of picture size
-cutoff <int> E..A. set cutoff bandwidth
-frame_size <int> E..A.
-qcomp <float> E.V.. video quantizer scale compression (VBR)
-qblur <float> E.V.. video quantizer scale blur (VBR)
-qmin <int> E.V.. min video quantizer scale (VBR)
-qmax <int> E.V.. max video quantizer scale (VBR)
-qdiff <int> E.V.. max difference between the quantizer scale (VBR)
-bf <int> E.V.. use 'frames' B frames
-b_qfactor <float> E.V.. qp factor between p and b frames
-rc_strategy <int> E.V.. ratecontrol method
-b_strategy <int> E.V.. strategy to choose between I/P/B-frames
-hurry_up <int> .DV..
-ps <int> E.V.. rtp payload size in bits
-bug <flags> .DV.. workaround not auto detected encoder bugs
autodetect .DV..
old_msmpeg4 .DV.. some old lavc generated msmpeg4v3 files (no autodetection)
xvid_ilace .DV.. Xvid interlacing bug (autodetected if fourcc==XVIX)
ump4 .DV.. (autodetected if fourcc==UMP4)
no_padding .DV.. padding bug (autodetected)
amv .DV..
ac_vlc .DV.. illegal vlc bug (autodetected per fourcc)
qpel_chroma .DV..
std_qpel .DV.. old standard qpel (autodetected per fourcc/version)
qpel_chroma2 .DV..
direct_blocksize .DV.. direct-qpel-blocksize bug (autodetected per fourcc/version)
edge .DV.. edge padding bug (autodetected per fourcc/version)
hpel_chroma .DV..
dc_clip .DV..
ms .DV.. workaround various bugs in microsofts broken decoders
-lelim <int> E.V.. single coefficient elimination threshold for luminance (negative values also consider dc coefficient)
-celim <int> E.V.. single coefficient elimination threshold for chrominance (negative values also consider dc coefficient)
-strict <int> .DVA. how strictly to follow the standards
very E.V.. strictly conform to a older more strict version of the spec or reference software
strict E.V.. strictly conform to all the things in the spec no matter what consequences
normal E.V..
inofficial E.V.. allow inofficial extensions
experimental E.V.. allow non standardized experimental things
-b_qoffset <float> E.V.. qp offset between p and b frames
-er <int> .DVA. set error resilience strategy
careful .DV..
compliant .DV..
aggressive .DV..
very_aggressive .DV..
-mpeg_quant <int> E.V.. use MPEG quantizers instead of H.263
-qsquish <float> E.V.. how to keep quantizer between qmin and qmax (0 = clip, 1 = use differentiable function)
-rc_qmod_amp <float> E.V.. experimental quantizer modulation
-rc_qmod_freq <int> E.V.. experimental quantizer modulation
-rc_eq <string> E.V.. set rate control equation
-maxrate <int> E.V.. set max video bitrate tolerance (in bits/s)
-minrate <int> E.V.. set min video bitrate tolerance (in bits/s)
-bufsize <int> E.VA. set ratecontrol buffer size (in bits)
-rc_buf_aggressivity <float> E.V.. currently useless
-i_qfactor <float> E.V.. qp factor between p and i frames
-i_qoffset <float> E.V.. qp offset between p and i frames
-rc_init_cplx <float> E.V.. initial complexity for 1-pass encoding
-dct <int> E.V.. DCT algorithm
auto E.V.. autoselect a good one (default)
fastint E.V.. fast integer
int E.V.. accurate integer
mmx E.V..
mlib E.V..
altivec E.V..
faan E.V.. floating point AAN DCT
-lumi_mask <float> E.V.. compresses bright areas stronger than medium ones
-tcplx_mask <float> E.V.. temporal complexity masking
-scplx_mask <float> E.V.. spatial complexity masking
-p_mask <float> E.V.. inter masking
-dark_mask <float> E.V.. compresses dark areas stronger than medium ones
-idct <int> EDV.. select IDCT implementation
auto EDV..
int EDV..
simple EDV..
simplemmx EDV..
libmpeg2mmx EDV..
ps2 EDV..
mlib EDV..
arm EDV..
altivec EDV..
sh4 EDV..
simplearm EDV..
simplearmv5te EDV..
h264 EDV..
vp3 EDV..
ipp EDV..
xvidmmx EDV..
-ec <flags> .DV.. set error concealment strategy
guess_mvs .DV.. iterative motion vector (MV) search (slow)
deblock .DV.. use strong deblock filter for damaged MBs
-pred <int> E.V.. prediction method
left E.V..
plane E.V..
median E.V..
-aspect <rational> E.V.. sample aspect ratio
-debug <flags> EDVAS print specific debug info
pict .DV.. picture info
rc E.V.. rate control
bitstream .DV..
mb_type .DV.. macroblock (MB) type
qp .DV.. per-block quantization parameter (QP)
mv .DV.. motion vector
dct_coeff .DV..
skip .DV..
startcode .DV..
pts .DV..
er .DV.. error resilience
mmco .DV.. memory management control operations (H.264)
bugs .DV..
vis_qp .DV.. visualize quantization parameter (QP), lower QP are tinted greener
vis_mb_type .DV.. visualize block types
-vismv <int> .DV.. visualize motion vectors (MVs)
pf .DV.. forward predicted MVs of P-frames
bf .DV.. forward predicted MVs of B-frames
bb .DV.. backward predicted MVs of B-frames
-mb_qmin <int> E.V.. obsolete, use qmin
-mb_qmax <int> E.V.. obsolete, use qmax
-cmp <int> E.V.. full pel me compare function
sad E.V.. sum of absolute differences, fast (default)
sse E.V.. sum of squared errors
satd E.V.. sum of absolute Hadamard transformed differences
dct E.V.. sum of absolute DCT transformed differences
psnr E.V.. sum of squared quantization errors (avoid, low quality)
bit E.V.. number of bits needed for the block
rd E.V.. rate distortion optimal, slow
zero E.V.. 0
vsad E.V.. sum of absolute vertical differences
vsse E.V.. sum of squared vertical differences
nsse E.V.. noise preserving sum of squared differences
w53 E.V.. 5/3 wavelet, only used in snow
w97 E.V.. 9/7 wavelet, only used in snow
dctmax E.V..
chroma E.V..
-subcmp <int> E.V.. sub pel me compare function
sad E.V.. sum of absolute differences, fast (default)
sse E.V.. sum of squared errors
satd E.V.. sum of absolute Hadamard transformed differences
dct E.V.. sum of absolute DCT transformed differences
psnr E.V.. sum of squared quantization errors (avoid, low quality)
bit E.V.. number of bits needed for the block
rd E.V.. rate distortion optimal, slow
zero E.V.. 0
vsad E.V.. sum of absolute vertical differences
vsse E.V.. sum of squared vertical differences
nsse E.V.. noise preserving sum of squared differences
w53 E.V.. 5/3 wavelet, only used in snow
w97 E.V.. 9/7 wavelet, only used in snow
dctmax E.V..
chroma E.V..
-mbcmp <int> E.V.. macroblock compare function
sad E.V.. sum of absolute differences, fast (default)
sse E.V.. sum of squared errors
satd E.V.. sum of absolute Hadamard transformed differences
dct E.V.. sum of absolute DCT transformed differences
psnr E.V.. sum of squared quantization errors (avoid, low quality)
bit E.V.. number of bits needed for the block
rd E.V.. rate distortion optimal, slow
zero E.V.. 0
vsad E.V.. sum of absolute vertical differences
vsse E.V.. sum of squared vertical differences
nsse E.V.. noise preserving sum of squared differences
w53 E.V.. 5/3 wavelet, only used in snow
w97 E.V.. 9/7 wavelet, only used in snow
dctmax E.V..
chroma E.V..
-ildctcmp <int> E.V.. interlaced dct compare function
sad E.V.. sum of absolute differences, fast (default)
sse E.V.. sum of squared errors
satd E.V.. sum of absolute Hadamard transformed differences
dct E.V.. sum of absolute DCT transformed differences
psnr E.V.. sum of squared quantization errors (avoid, low quality)
bit E.V.. number of bits needed for the block
rd E.V.. rate distortion optimal, slow
zero E.V.. 0
vsad E.V.. sum of absolute vertical differences
vsse E.V.. sum of squared vertical differences
nsse E.V.. noise preserving sum of squared differences
w53 E.V.. 5/3 wavelet, only used in snow
w97 E.V.. 9/7 wavelet, only used in snow
dctmax E.V..
chroma E.V..
-dia_size <int> E.V.. diamond type & size for motion estimation
-last_pred <int> E.V.. amount of motion predictors from the previous frame
-preme <int> E.V.. pre motion estimation
-precmp <int> E.V.. pre motion estimation compare function
sad E.V.. sum of absolute differences, fast (default)
sse E.V.. sum of squared errors
satd E.V.. sum of absolute Hadamard transformed differences
dct E.V.. sum of absolute DCT transformed differences
psnr E.V.. sum of squared quantization errors (avoid, low quality)
bit E.V.. number of bits needed for the block
rd E.V.. rate distortion optimal, slow
zero E.V.. 0
vsad E.V.. sum of absolute vertical differences
vsse E.V.. sum of squared vertical differences
nsse E.V.. noise preserving sum of squared differences
w53 E.V.. 5/3 wavelet, only used in snow
w97 E.V.. 9/7 wavelet, only used in snow
dctmax E.V..
chroma E.V..
-pre_dia_size <int> E.V.. diamond type & size for motion estimation pre-pass
-subq <int> E.V.. sub pel motion estimation quality
-me_range <int> E.V.. limit motion vectors range (1023 for DivX player)
-ibias <int> E.V.. intra quant bias
-pbias <int> E.V.. inter quant bias
-coder <int> E.V..
vlc E.V.. variable length coder / huffman coder
ac E.V.. arithmetic coder
raw E.V.. raw (no encoding)
rle E.V.. run-length coder
deflate E.V.. deflate-based coder
-context <int> E.V.. context model
-mbd <int> E.V.. macroblock decision algorithm (high quality mode)
simple E.V.. use mbcmp (default)
bits E.V.. use fewest bits
rd E.V.. use best rate distortion
-sc_threshold <int> E.V.. scene change threshold
-lmin <int> E.V.. min lagrange factor (VBR)
-lmax <int> E.V.. max lagrange factor (VBR)
-nr <int> E.V.. noise reduction
-rc_init_occupancy <int> E.V.. number of bits which should be loaded into the rc buffer before decoding starts
-inter_threshold <int> E.V..
-flags2 <flags> EDVA.
fast E.V.. allow non spec compliant speedup tricks
sgop E.V.. strictly enforce gop size
noout E.V.. skip bitstream encoding
local_header E.V.. place global headers at every keyframe instead of in extradata
bpyramid E.V.. allows B-frames to be used as references for predicting
wpred E.V.. weighted biprediction for b-frames (H.264)
mixed_refs E.V.. one reference per partition, as opposed to one reference per macroblock
dct8x8 E.V.. high profile 8x8 transform (H.264)
fastpskip E.V.. fast pskip (H.264)
aud E.V.. access unit delimiters (H.264)
brdo E.V.. b-frame rate-distortion optimization
skiprd E.V.. RD optimal MB level residual skipping
ivlc E.V.. intra vlc table
drop_frame_timecode E.V..
non_linear_q E.V.. use non linear quantizer
-error <int> E.V..
-antialias <int> .DV.. MP3 antialias algorithm
auto .DV..
fastint .DV..
int .DV..
float .DV..
-qns <int> E.V.. quantizer noise shaping
-threads <int> EDV..
-mb_threshold <int> E.V.. macroblock threshold
-dc <int> E.V.. intra_dc_precision
-nssew <int> E.V.. nsse weight
-skip_top <int> .DV.. number of macroblock rows at the top which are skipped
-skip_bottom <int> .DV.. number of macroblock rows at the bottom which are skipped
-profile <int> E.VA.
unknown E.VA.
aac_main E..A.
aac_low E..A.
aac_ssr E..A.
aac_ltp E..A.
-level <int> E.VA.
unknown E.VA.
-lowres <int> .DV.. decode at 1= 1/2, 2=1/4, 3=1/8 resolutions
-skip_threshold <int> E.V.. frame skip threshold
-skip_factor <int> E.V.. frame skip factor
-skip_exp <int> E.V.. frame skip exponent
-skipcmp <int> E.V.. frame skip compare function
sad E.V.. sum of absolute differences, fast (default)
sse E.V.. sum of squared errors
satd E.V.. sum of absolute Hadamard transformed differences
dct E.V.. sum of absolute DCT transformed differences
psnr E.V.. sum of squared quantization errors (avoid, low quality)
bit E.V.. number of bits needed for the block
rd E.V.. rate distortion optimal, slow
zero E.V.. 0
vsad E.V.. sum of absolute vertical differences
vsse E.V.. sum of squared vertical differences
nsse E.V.. noise preserving sum of squared differences
w53 E.V.. 5/3 wavelet, only used in snow
w97 E.V.. 9/7 wavelet, only used in snow
dctmax E.V..
chroma E.V..
-border_mask <float> E.V.. increases the quantizer for macroblocks close to borders
-mblmin <int> E.V.. min macroblock lagrange factor (VBR)
-mblmax <int> E.V.. max macroblock lagrange factor (VBR)
-mepc <int> E.V.. motion estimation bitrate penalty compensation (1.0 = 256)
-bidir_refine <int> E.V.. refine the two motion vectors used in bidirectional macroblocks
-brd_scale <int> E.V.. downscales frames for dynamic B-frame decision
-crf <float> E.V.. enables constant quality mode, and selects the quality (x264)
-cqp <int> E.V.. constant quantization parameter rate control method
-keyint_min <int> E.V.. minimum interval between IDR-frames (x264)
-refs <int> E.V.. reference frames to consider for motion compensation (Snow)
-chromaoffset <int> E.V.. chroma qp offset from luma
-bframebias <int> E.V.. influences how often B-frames are used
-trellis <int> E.VA. rate-distortion optimal quantization
-directpred <int> E.V.. direct mv prediction mode - 0 (none), 1 (spatial), 2 (temporal)
-complexityblur <float> E.V.. reduce fluctuations in qp (before curve compression)
-deblockalpha <int> E.V.. in-loop deblocking filter alphac0 parameter
-deblockbeta <int> E.V.. in-loop deblocking filter beta parameter
-partitions <flags> E.V.. macroblock subpartition sizes to consider
parti4x4 E.V..
parti8x8 E.V..
partp4x4 E.V..
partp8x8 E.V..
partb8x8 E.V..
-sc_factor <int> E.V.. multiplied by qscale for each frame and added to scene_change_score
-mv0_threshold <int> E.V..
-b_sensitivity <int> E.V.. adjusts sensitivity of b_frame_strategy 1
-compression_level <int> E.VA.
-use_lpc <int> E..A. sets whether to use LPC mode (FLAC)
-lpc_coeff_precision <int> E..A. LPC coefficient precision (FLAC)
-min_prediction_order <int> E..A.
-max_prediction_order <int> E..A.
-prediction_order_method <int> E..A. search method for selecting prediction order
-min_partition_order <int> E..A.
-max_partition_order <int> E..A.
-timecode_frame_start <int> E.V.. GOP timecode frame start number, in non drop frame format
-request_channels <int> .D.A. set desired number of audio channels
-drc_scale <float> .D.A. percentage of dynamic range compression to apply
AVFormatContext AVOptions:
-probesize <int> .D...
-muxrate <int> E.... set mux rate
-packetsize <int> E.... set packet size
-fflags <flags> ED...
ignidx .D... ignore index
genpts .D... generate pts
-track <int> E.... set the track number
-year <int> E.... set the year
-analyzeduration <int> .D... how many microseconds are analyzed to estimate duration
-cryptokey <binary> .D... decryption key
-indexmem <int> .D... max memory used for timestamp index (per stream)
SWScaler AVOptions:
-sws_flags <flags> E.V.. scaler/cpu flags
fast_bilinear E.V.. fast bilinear
bilinear E.V.. bilinear
bicubic E.V.. bicubic
experimental E.V.. experimental
neighbor E.V.. nearest neighbor
area E.V.. averaging area
bicublin E.V.. luma bicubic, chroma bilinear
gauss E.V.. gaussian
sinc E.V.. sinc
lanczos E.V.. lanczos
spline E.V.. natural bicubic spline
print_info E.V.. print info
accurate_rnd E.V.. accurate rounding
mmx E.V.. MMX SIMD acceleration
mmx2 E.V.. MMX2 SIMD acceleration
3dnow E.V.. 3DNOW SIMD acceleration
altivec E.V.. AltiVec SIMD acceleration
bfin E.V.. Blackfin SIMD acceleration
full_chroma_int E.V.. full chroma interpolation
full_chroma_inp E.V.. full chroma input

et rien au dessu...

Tu veux que je refasse ffmpeg -i fichier

oui.

je souhaite uniquement la partie que je t'ai souligné dans mon message n°11 !

Y me donne ceci :

molig@molig-laptop:~$ ffmpeg -i "fichier" -vn -acodec copy "fichier.mp3"
FFmpeg version r11872+debian_3:0.svn20080206-12ubuntu3.1, Copyright (c) 2000-2008 Fabrice Bellard, et al.
configuration: --enable-gpl --enable-pp --enable-swscaler --enable-x11grab --prefix=/usr --enable-libgsm --enable-libtheora --enable-libvorbis --enable-pthreads --disable-strip --enable-libfaad --enable-libfaadbin --enable-liba52 --enable-liba52bin --enable-libdc1394 --disable-armv5te --disable-armv6 --disable-altivec --disable-vis --enable-shared --disable-static
libavutil version: 49.6.0
libavcodec version: 51.50.0
libavformat version: 52.7.0
libavdevice version: 52.0.0
built on Mar 13 2009 17:48:10, gcc: 4.3.2

ok !

pour l'instant, je n'ai pas trop de temps....

je reviendrai dès que possible ....

il faudrait que tu nous dises clairement (en mots donc) ce que tu souhaites faire avec ta commande ffmpeg

ensuite il faudrait indiquer clairement la commande ffmpeg exacte que tu tapes.

enfin, es-tu sûr que la commande que tu tapes est correcte ? tu as ci-dessous des exemple pour ffmpeg :

https://www.commandlinefu.com/commands/tagged/76/ffmpeg

ok ! c'est probablement un nouveau format FLV !
Codec ID 7 corresponds to H.264, so just get newer FFmpeg.

et ceci :

ffmpeg -i "SOME.FLV" -f mp4 -r 29.970 -s 720x400 -aspect 16:9 -vcodec copy -an "SOMEOUTPUT.mp4

ici il y a une discussion très intéressante (en anglais) :
https://forum.videohelp.com/threads/296972-Unsupported-FLV-codec-or-format