Newbie needs explanation on supported input format

[luky55]

Hello,

I needs some clarifications on h264 status in version 2.5.6
The wiki says hat H264 decoder is available.
I have extracted the video stream of an mkv movie, but when I try to open it with avidemux, it says "could not open the file".
I put below the avidemux logs as well as the mediainfo output.

Can someone explain what's wrong with that file?
Thanks.


avidemux log:
Simple loading:
file: F:\movie.h264, size: 51119168552
found 1 files
Done
Cannot identify F:\movie.h264 as mpeg (0/0)
Cannot identify as H264 ES (0/50)

unrecognized file detected...
(01000000)
'd (29006427)1000000 -> 1000000
Probing : F:\movie.h264

Simple loading:
file: F:\movie.h264, size: 51119168552
found 1 files
Done
Cannot identify F:\movie.h264 as mpeg (0/0)
Cannot identify as H264 ES (0/50)

unrecognized file detected...
(01000000)
'd (29006427)a3df451a -> a3df451a

mediainfo log:
Général
Nom complet                              : F:\movie.h264
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Taille du fichier                        : 47,6 Gio
Type de débit global                     : Variable

Vidéo
Format                                   : AVC
Format/Info                              : Advanced Video Codec
Profil du format                         : High@L4.1
Paramètres du format, CABAC              : Oui
Paramètres du format, RefFrames          : 2 images
Paramètres du format, GOP                : M=1, N=10
Type de débit                            : Variable
Largeur                                  : 1 920 pixels
Hauteur                                  : 1 080 pixels
Format à l'écran                         : 16/9
Images par seconde                       : 23,976 Im/s
Espace de couleurs                       : YUV
Sous-échantillonnage de la chrominance   : 4:2:0
Profondeur des couleurs                  : 8 bits
Type de balayage                         : Progressif

[Jan Gruuthuse]

Try with avidemux 2.6.1, it is more likely these HD TV video's open with it.
H.264/MPEG-4 Part 10 or AVC (Advanced Video Coding) is a standard for video compression, and is currently one of the most commonly used formats for the recording, compression, and distribution of high definition video. source: H.264/MPEG-4 AVC

[luky55]

Thanks, will try it.
Ithink that  read somewhere, on this forum maybe(?), that 2.6.1 is not yet at the same level as 2.5, in terms of image quality, is that right?

[Jan Gruuthuse]

No it is not. Main difference between 2.5 and 2.6 branch: 1st is frame based, 2nd is time based: due to new compression techniques used in video codecs. Newer codecs use virtual frames (do not exist in reality, need to be reconstructed.)
Only check in Edit -> Preferences - [Video] and uncheck here in the Default Postprocessing horizontal and vertical deblocking.
I use both 2.5.6 and 2.6.1 alongside. If something does not open in 2.6.1, try with 2.5.6.
If your video card behaves badly with openGL: Don't use Video display [openGL (best)], you can still leave [v] Enable openGL support. This could be the case for Intel gpu or none nvidia gpu. Best result is vdpau (nvidia under linux). Especially for fast scrolling forward/backward.

[luky55]

Hi,

I installed the build 8459, no more problem to read this movie.
Thanks a lot