Avidemux Forum

Avidemux => Main version 2.6 => Topic started by: zakk on August 17, 2013, 10:03:54 AM

Title: No I frames detected
Post by: zakk on August 17, 2013, 10:03:54 AM
Hi, as long as I can remember, 2.6 would never detect I frames on my input streams. It only says "P-Frame" at the bottom. I didn't mind first, but now I need to join two .ts files together. The result is always corrupted, since I can't make the difference between I and P for my A&B markers.

Here's a 5MB sample:http://www.sendspace.com/file/fpcjd2 (http://www.sendspace.com/file/fpcjd2)

Thanks.
Title: Re: No I frames detected
Post by: mean on August 17, 2013, 02:29:46 PM
for h264 there are I frame and IDR
IDR are seek points, i.e. you can ignore the past and start decoding happily from there
I frame are not, if you start decoding from there, you might have up to recoveryDelay garbage frames
So my guess is that your file contains no IDR, i'll have a look
Title: Re: No I frames detected
Post by: mean on August 17, 2013, 03:06:56 PM
Works here
Win32/win64 ?
Title: Re: No I frames detected
Post by: zakk on August 17, 2013, 03:24:41 PM
Win32. Also tried 32bits & 64 bits on Win64. What's wrong on my system ??
Title: Re: No I frames detected
Post by: mean on August 17, 2013, 08:36:48 PM
I tried your sample with linux win32 win64. All seemed ok
Did you try with the same sample (removing the .idx2 might help)
Title: Re: No I frames detected
Post by: zakk on August 17, 2013, 09:29:22 PM
oui, je l'ai fait avec le fichier uploadé et en effacant les .idx2 à chaque fois.
dès l'ouverture le curseur se place à 400ms et impossible de reculer (bon ça ne me dérange pas...)
si je clique sur les doubles flèches il trouve 5 P-frames (ceux que j'utilise pour mes marqueurs A&B), par contre en maintenant la flèche clavier droit appuyée (image suivante) j'en compte environ 21 (je sais pas si ça aide  :) )

C'est bête parce que à la lecture du mkv avec mpc-hc l'image se fige au moment du collage, même après un remux mkvtoolnix.
Title: Re: No I frames detected
Post by: mean on August 18, 2013, 05:18:05 AM
12 Iframes, including 5 IDR