Video reconnu comme fichier audio.

Bonjour à tous,
Je rencontre un problème qui me dépasse un peu .... tout est dans le titre mais je vais développer un peu ^^
Donc, on m'a demandé de faire un dvd regroupant plusieurs petites vidéos.
Mon problème est que quand j'importe ces vidéos dans Encore, Premiere ou After Effect, certaines sont reconnu en tant que vidéo alors que d'autres sont reconnu comme fichiers audios.
J'ai d'abords pensé à un problème de codec mais ...
     - ces vidéos sont très bien lut sous vcl & media player
     - ces vidéos ont toutes le même conteneur ainsi que le même codec
     -> je ne vois donc pas d'où cela peut t'il venir ???
Bon j'ai toujours une alternative, à savoir que si je réencode les vidéos avec mediacoder, mes fichiers sont ensuite reconnus comme vidéos mais soi je garde le même bitrate et je perds malgré tout en qualité (en gardant le même conteneur mais codec différents) soi je garde la qualité mais forcement le fichier devient plus gros...ce qui est problématique car je garde tout mes travaux. J'aimerai vraiment pouvoir résoudre le problème sans passer par une réencode sous mediacoder et surtout comprendre ce problème oO
Infos utiles :
version logiciel -> Encore, Premiere et After Effect CS4
info sur une vidéo reconnu en tant que vidéo :
              - avec media coder
Général
Format                      
: MPEG-4
Format profile              
: Base Media / Version 2
Codec ID                    
: mp42
File size                   
: 25.8 MiB
Duration                    
: 4mn 51s
Overall bit rate            
: 742 Kbps
Encoded date                
: UTC 2011-03-22 20:38:46
Tagged date                 
: UTC 2011-03-22 20:38:46
gsst                        
: 0
gstd                        
: 291411
gssd                        
: BADC21464MH1338988125513609
gshh                        
: v14.nonxt7.c.youtube.com
Video
ID                          
: 1
Format                      
: AVC
Format/Info                 
: Advanced Video Codec
Format profile              
: [email protected]
Format settings, CABAC      
: No
Format settings, ReFrames   
: 1 frame
Codec ID                    
: avc1
Codec ID/Info               
: Advanced Video Coding
Duration                    
: 4mn 51s
Bit rate mode               
: Variable
Bit rate                    
: 640 Kbps
Maximum bit rate            
: 1 953 Kbps
Width                       
: 640 pixels
Height                      
: 360 pixels
Display aspect ratio        
: 16:9
Frame rate mode             
: Variable
Frame rate                  
: 29.970 fps
Minimum frame rate          
: 29.412 fps
Maximum frame rate          
: 200.000 fps
Resolution                  
: 8 bits
Colorimetry                 
: 4:2:0
Scan type                   
: Progressive
Bits/(Pixel*Frame)          
: 0.093
Stream size                 
: 22.2 MiB (86%)
Tagged date                 
: UTC 2011-03-22 20:38:50
           - avec media info :
Profil du format                    
: Base Media / Version 2
Identifiant du codec                
: mp42
Taille du fichier                   
: 25,8 Mio
Durée                               
: 4mn 51s
Type de débit global                
: Variable
Débit global moyen                  
: 742 Kbps
Date d'encodage                     
: UTC 2011-03-22 20:38:46
Date de marquage                    
: UTC 2011-03-22 20:38:46
gsst                                
: 0
gstd                                
: 291411
gssd                                
: BADC21464MH1338988125513609
Vidéo
ID                                  
: 1
Format                              
: AVC
Format/Info                         
: Advanced Video Codec
Profil du format                    
: [email protected]
Paramètres du format, CABAC         
: Non
Paramètres du format, RefFrames     
: 1 image
Identifiant du codec                
: avc1
Identifiant du codec/Info           
: Advanced Video Coding
Durée                               
: 4mn 51s
Débit                               
: 640 Kbps
Débit maximum                       
: 1 953 Kbps
Largeur                             
: 640 pixels
Hauteur                             
: 360 pixels
Format à l'écran                    
: 16/9
Type d'images/s                     
: Variable
Images par seconde                  
: 29,970 Im/s
Images/s mini                       
: 29,412 Im/s
Images/s maxi                       
: 200,000 Im/s
Espace de couleurs                  
: YUV
Sous-échantillonnage de la chrominance   : 4:2:0
Profondeur des couleurs             
: 8 bits
Type d'image                        
: Progressif
Bits/(Pixel*Image)                  
: 0.093
Taille du flux                      
: 22,2 Mio (86%)
Date de marquage                    
: UTC 2011-03-22 20:38:50
info sur une vidéo reconnu en tant que fichier audio :
               - avec media coder :
Format                      
: MPEG-4
Format profile              
: Base Media / Version 2
Codec ID                    
: mp42
File size                   
: 26.4 MiB
Duration                    
: 5mn 29s
Overall bit rate            
: 674 Kbps
Encoded date                
: UTC 2009-10-02 04:55:44
Tagged date                 
: UTC 2009-10-02 04:55:44
gsst                        
: 0
gstd                        
: 329536
gssd                        
: B5A543A2BHH1338824382648886
Video
ID                          
: 2
Format                      
: AVC
Format/Info                 
: Advanced Video Codec
Format profile              
: [email protected]
Format settings, CABAC      
: No
Format settings, ReFrames   
: 1 frame
Codec ID                    
: avc1
Codec ID/Info               
: Advanced Video Coding
Duration                    
: 5mn 29s
Bit rate mode               
: Variable
Bit rate                    
: 539 Kbps
Maximum bit rate            
: 3 031 Kbps
Width                       
: 480 pixels
Height                      
: 360 pixels
Display aspect ratio        
: 4:3
Frame rate mode             
: Constant
Frame rate                  
: 29.970 fps
Resolution                  
: 8 bits
Colorimetry                 
: 4:2:0
Scan type                   
: Progressive
Bits/(Pixel*Frame)          
: 0.104
Stream size                 
: 21.2 MiB (80%)
Title                       
: (C) 2007 Google Inc. v08.13.2007.
Encoded date                
: UTC 2009-10-02 04:55:45
Tagged date                 
: UTC 2009-10-02 04:55:45
          - avec media info :
Format                              
: MPEG-4
Profil du format                    
: Base Media / Version 2
Identifiant du codec                
: mp42
Taille du fichier                   
: 26,4 Mio
Durée                               
: 5mn 29s
Type de débit global                
: Variable
Débit global moyen                  
: 674 Kbps
Date d'encodage                     
: UTC 2009-10-02 04:55:44
Date de marquage                    
: UTC 2009-10-02 04:55:44
gsst                                
: 0
gstd                                
: 329536
gssd                                
: B5A543A2BHH1338824382648886
Vidéo
ID                                  
: 2
Format                              
: AVC
Format/Info                         
: Advanced Video Codec
Profil du format                    
: [email protected]
Paramètres du format, CABAC         
: Non
Paramètres du format, RefFrames     
: 1 image
Identifiant du codec                
: avc1
Identifiant du codec/Info           
: Advanced Video Coding
Durée                               
: 5mn 29s
Débit                               
: 540 Kbps
Débit maximum                       
: 3 031 Kbps
Largeur                             
: 480 pixels
Hauteur                             
: 360 pixels
Format à l'écran                    
: 4/3
Type d'images/s                     
: Constant
Images par seconde                  
: 29,970 Im/s
Espace de couleurs                  
: YUV
Sous-échantillonnage de la chrominance   : 4:2:0
Profondeur des couleurs             
: 8 bits
Type d'image                        
: Progressif
Bits/(Pixel*Image)                  
: 0.104
Taille du flux                      
: 21,2 Mio (80%)
Titre                               
: (C) 2007 Google Inc. v08.13.2007.
Date d'encodage                     
: UTC 2009-10-02 04:55:45
Date de marquage                    
: UTC 2009-10-02 04:55:45

Bon, déjà merci pour ta réponse ^^
C'est pas tout simple en anglais, je m'arrache un peu les cheveux mais bon c'est déjà un début de piste.
Dans ce post, j'ai trouvé une petite solution qui peut aider des fois.
En gros j'ai donc essayé de changer l'extension du fichier (.mp4 -> .avi). Je dirais que c'est du bricolage pas très propre mais bon pourquoi pas. Et effectivement cette solution fonctionne, les fichiers sont reconnu comme fichier video.
Malheuresement pour moi, cela engendre d'autre problème que j'essaye de résoudre.
Quand j'importe le fichier sous After Effect, j'avais une boite de dialogue concernant ffdshow avec un choix a faire (l'utiliser ou non en gros car soi disant pas installé oO j'en suis le premier surpris). Une fois le fichier posé dans la timeline, je pouvais le lire seulement. Je dis seulement car si je veux naviguer plus loin dans la time line et que enn suite je lance une lecture, la video sera lut du début (je sais pas si j'ai été très clair :s) -> tentative de réinstallation de ffdshow = maintenant, je peux importer la video mais dès que je fais le moindre clic dessus, le logiciel plante (Pr, AE, En) :/.
J'ai ensuite exploité la piste de GSpot car ils en parlent un moment dans le topic que tu m'as linké (ou alors sur un des liens du topic qui renvoi ailleurs je sais plus). Bref, j'ai vu que j'avais malgré tout quelque erreur sur certains fichier...bon ces erreurs ne m'ont jamais vraiment posé problème (il m'arrivait d'avoir des problèmes de ce genre mais j'avais de suite pensé à un problème de codec et donc opté directement pour la solution ré-encodage. Içi, la différence c'est que les vidéos sont toute avec le même codec/conteneur etc...)
Bref, la je suis un peu bloqué car les logiciel plante à la suite de la ré-installation de ffdshow...je continuerai demain....en commençant par une ré-installation de tout mes codecs, vérification GSpot et installation manuel (si possible) des fichier qui pose problème :/
Mais je comprends toujours pas qu'avant modification, certains fichier étaient reconnu en fichier audio alors que d'autre étaient reconnu en fichier video

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