Meat_PoPsiclez
10th May 2006, 02:49
The video in question was encoded with the intention of permanent archival, so high bitrate is being used (q 3.75 giving ~11 - 25mbit/s). At various moments (a recurring theme seems to be the last frame in a gvop, ie frame before keyframe) error blocks will appear. What is consistent is the blocks area on a frame. What isn't consistent is the blocks themselfs are different every decode (skip a frame forward then back and it's different every time). I'm posting some example images to outline the problem, and also a clip that shows it. The clip is appreciably huge, so please only dl it if you can assist. This clip is a single gvop and the frame in question is the last frame in the group. This gvop was pulled from the middle of an encode.
http://www.anti-logic.com/richard/xvidbug-1.png
http://www.anti-logic.com/richard/xvidbug-2.png
http://www.anti-logic.com/richard/xvid_error_chunk.avi
The errors persist (in the same incosistent manner) using ffdshow's vfw, koepi's dshow xvid binary, and even xbmc's ffdshow mplayer implement. What I really want to know is if it's an encoder issue, and the videos are damaged, or is it a decoding issue? I've already spent ~60 cpu hours transcoding video, it'd be a shame if it's all bunk :(
The errors do not occur when using similiar options with the mpeg matrix and bitrate based control, leading me to believe it's not a hardware problem.
What version & date of XviD are you using?
Koepi binary XviD-1.1.0-30122005 _Final Release_
What DShow filter are using to decode it?
Tested both dshow binary by Koepi (via wmp), and ffdshow's vfw interface (via vdub mod)
Does the bug occur with every encode you do or just the one clip?
Every encode with this setup
Your computer config. (i.e. Media Players, Hardware (specifically: graphics card, Operating System, CPU) )
Athlon Xp 2500+ 1GB pc2700, ATI Radeon 8500, Windows XP SP2
Please post all your options you using in your encode (i.e. 2pass, GMC, Q-Pel, Bitrate, VHQ, etc)
adaptive quantitizer, interlaced, q-pel, gmp, vhq (mode 4), motion precision 6, chroma motion, trellis quant, 300 frame i-frame max, eqm_v3ehr.xcm matrix, constant q 3.75, no b-frames
Please try to fit a very brief summary of your problem into the subject line (rather than just having a subject of "help!" or similar)
Please specify the container format you are encoding to/playing from.
AVI (adobe premiere pro 1.5 movie export)
http://www.anti-logic.com/richard/xvidbug-1.png
http://www.anti-logic.com/richard/xvidbug-2.png
http://www.anti-logic.com/richard/xvid_error_chunk.avi
The errors persist (in the same incosistent manner) using ffdshow's vfw, koepi's dshow xvid binary, and even xbmc's ffdshow mplayer implement. What I really want to know is if it's an encoder issue, and the videos are damaged, or is it a decoding issue? I've already spent ~60 cpu hours transcoding video, it'd be a shame if it's all bunk :(
The errors do not occur when using similiar options with the mpeg matrix and bitrate based control, leading me to believe it's not a hardware problem.
What version & date of XviD are you using?
Koepi binary XviD-1.1.0-30122005 _Final Release_
What DShow filter are using to decode it?
Tested both dshow binary by Koepi (via wmp), and ffdshow's vfw interface (via vdub mod)
Does the bug occur with every encode you do or just the one clip?
Every encode with this setup
Your computer config. (i.e. Media Players, Hardware (specifically: graphics card, Operating System, CPU) )
Athlon Xp 2500+ 1GB pc2700, ATI Radeon 8500, Windows XP SP2
Please post all your options you using in your encode (i.e. 2pass, GMC, Q-Pel, Bitrate, VHQ, etc)
adaptive quantitizer, interlaced, q-pel, gmp, vhq (mode 4), motion precision 6, chroma motion, trellis quant, 300 frame i-frame max, eqm_v3ehr.xcm matrix, constant q 3.75, no b-frames
Please try to fit a very brief summary of your problem into the subject line (rather than just having a subject of "help!" or similar)
Please specify the container format you are encoding to/playing from.
AVI (adobe premiere pro 1.5 movie export)