I have a mkv file.Following is the info
General
Format : Matroska
Format version : Version 2
File size : 104 MiB
Duration : 20mn 43s
Overall bit rate : 701 Kbps
Writing application : HandBrake 0.9.5
Writing library : libmkv 0.6.4.1
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Main@L3.0
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Codec ID : V_MPEG4/ISO/AVC
Duration : 20mn 43s
Nominal bit rate : 630 Kbps
Width : 848 pixels
Height : 480 pixels
Display aspect ratio : 16:9
Frame rate mode : Variable
Frame rate : 23.976 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.065
Writing library : x264 core 112
Encoding settings : cabac=1 / ref=2 / deblock=1:0:0 / analyse=0x1:0x111 / me=hex / subme=6 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=0 / me_range=16 / chroma_me=1 / trellis=0 / 8x8dct=0 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=9 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / constrained_intra=0 / bframes=2 / b_pyramid=2 / b_adapt=1 / b_bias=0 / direct=1 / weightb=0 / open_gop=0 / weightp=2 / keyint=240 / keyint_min=23 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=2pass / mbtree=1 / bitrate=630 / ratetol=1.0 / qcomp=0.60 / qpmin=3 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / aq=1:1.00
Language : English
Default : Yes
Forced : No
Color primaries : BT.601-6 525, BT.1358 525, BT.1700 NTSC, SMPTE 170M
Transfer characteristics : BT.709-5, BT.1361
Matrix coefficients : BT.601-6 525, BT.1358 525, BT.1700 NTSC, SMPTE 170M
Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : A_AAC
Duration : 20mn 43s
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Compression mode : Lossy
Default : Yes
Forced : No
I have a subtitle for that video file.The problem here is that there is some error in the subtitle(the text comes long after the video).Alright,had it been a constant error i could have fixed it with vlc,but the error keeps changing.(keeps on icreasing every sec).How do i fix it????
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You must probably resync it completly with for example subtitle edit. Or try find another subtitle file that matches your source video better.
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Frame rate mode : Variable
Probably easier to get original source then encode it CFR. Then your subs will probably match -
i searched the net.No other subtitles.Maybe the subtitles are bad.But i think the mkv file is compressed to a very great extent because of which they are going out of sync.Is that possible?Temme a way to decompress the mkv file so that i can check if the subtitles sync with the decompressed video.
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Baldrick resynching the subtitle is as good as making one by myself.It takes hell lotta time.
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There might be another reason for the sub sync issue, I'm just guessing VFR might play a role
You take the original source (not the mkv) , and encode it CFR
Sometimes you can convert the mkv to CFR using avisynth with DirectShowSource, convertfps=true, but it doesn't always work. It's better to start with original source
See these:
http://forums.animesuki.com/showthread.php?t=34738
http://avisynth.org/mediawiki/VFR
http://docs.aegisub.org/manual/Video
But i think the mkv file is compressed to a very great extent because of which they are going out of sync.Is that possible? -
But i don't have the original source.Its a downloaded file.Any chance of fixing this one?(given the fact that you said "it doesn't always work").
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One more thing.We are only thinking about the video file.Can there be a possibility that the subtitles itself are bad.(Though i hardly think so).
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Yes, it might be the subs are bad. Go ask wherever you downloaded it from
If you want to try converting it to CFR (might just be a waste of time, and re-encoding)
Code:DirectShowSource("video.mkv", fps=23.976, convertfps=true) AssumeFPS(24000,1001)
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