I need help with open gop i think

[Rathgar]

Ok i have a movie that is a .mkv that i want to mux to mp4 the problem is that when its doen it plays fine but the seeking is buggert after doing some reading it seams it a problem with open gop. I dont realy want to re-encode the video so i want th know if there is a way i can fix it without re-encoding or a way to re-encode without lossing quality or a increase in size a step by step guide whoud be nice if posseible following is the video media info
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings, CABAC : Yes
Format settings, ReFrames : 3 frames
Codec ID : V_MPEG4/ISO/AVC
Duration : 1h 49mn
Bit rate mode : Variable
Nominal bit rate : 2 190 Kbps
Maximum bit rate : 20.0 Mbps
Width : 1 280 pixels
Height : 688 pixels
Display aspect ratio : 1.860
Frame rate : 23.976 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.104
Writing library : x264 core 114 r1924 08d04a4
Encoding settings : cabac=1 / ref=4 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=7 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=6 / sliced_threads=0 / slices=4 / nr=100 / decimate=1 / interlaced=0 / constrained_intra=0 / bframes=3 / b_pyramid=1 / b_adapt=1 / b_bias=0 / direct=1 / weightb=1 / open_gop=2 / weightp=0 / keyint=24 / keyint_min=2 / scenecut=40 / intra_refresh=0 / rc_lookahead=24 / rc=2pass / mbtree=1 / bitrate=2190 / ratetol=1.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / vbv_maxrate=20000 / vbv_bufsize=20000 / nal_hrd=vbr / ip_ratio=1.40 / aq=1:1.00
Color primaries : BT.709-5, BT.1361, IEC 61966-2-4, SMPTE RP177
Transfer characteristics : BT.709-5, BT.1361
Matrix coefficients : BT.709-5, BT.1361, IEC 61966-2-4 709, SMPTE RP177

[poisondeathray]

Not possible without re-encoding

How are you playing this back? What software or hardware has the problems with the seek ? Note some older decoders did not support open gop

[Rathgar]

Playing it on my pc try'd mpc, wmp, itunes and vlc

[poisondeathray]

What decoder are you using for MPC ?

Does MPCHC have problems with seeks ?

What are your hardware specs ?

[poisondeathray]

wait; are you saying it seeks fine in mkv container? But only when you re-wrap into mp4 seeking becomes a problem ?

If so, how you are you re-wrapping ? Try something else like yamb, mp4creator, ffmpeg

[Rathgar]

Yes it is only when i re-wrap it that it gives the problem i have tryd yamb, XviD4PSP and Avidemux i have been a bit to lazy to try and figure out how ffmpeg works

[poisondeathray]

Try mkvtomp4
https://forum.videohelp.com/threads/340675-Mkv%D0%A2%D0%BEMp4-v0-218-rapid-tool-for-repack-Mkv-to-Mp4


But it might be a playback configuration problem, like a bad mp4 splitter, try configuring it with lav or haali instead (although vlc doesn't rely on those, it should be ok, but some versions of vlc are buggy)

[Rathgar]

Ill try mkvtomp4 and i took a look at what decoder i use it is haali and it shoud be the latest version i installed the latest k-lite pack