Help? How to extract vobsub from MP4

[hnle1988]

Hi everyone,

I have a MP4 video that has vobsub file as subtitles. Is there a way that I can extract it and convert it into srt file . I've tried everything including MKVtoolkit and MKVextractor Gui, but they only work on MKV format, and if I try to convert the MP4 into the MKV, I'll lose the vobsub file. I did try Subtitles Edit but as I tried to import the video, it told me that I need DVD or Bluray format to do so, and since I can't extract the vobsub, I can't use that option either. It seems like I run out of idea of what to do. Anyone can help????

[ProWo]

Post a mediainfo report (text mode) of your mp4 file here.

[johns0]

You shouldn't lose the subtitle fonts when converting mp4 to mkv with mkvmerge,it works with mp4 and keeps subs.

[hnle1988]

I really appreciate any help that provided. Here is the mediainfo that I have:

General

Format : MPEG-4
Format profile : Base Media
Codec ID : isom (isom/iso2/mp41)
File size : 2.06 GiB
Duration : 45 min 6 s
Overall bit rate : 6 544 kb/s
Writing application : YH Private Tool ver 2.3
Comment : Credits to CHDWEB

Video
ID : 1
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : Main 10@L5@Main
Codec ID : hev1
Codec ID/Info : High Efficiency Video Coding
Duration : 45 min 6 s
Bit rate : 6 333 kb/s
Width : 3 840 pixels
Height : 2 160 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 25.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 10 bits
Bits/(Pixel*Frame) : 0.031
Stream size : 1.99 GiB (97%)
Title : Video#Immortal Samsara
Language : Chinese
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
Codec configuration box : hvcC

Audio
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : mp4a-40-2
Duration : 45 min 6 s
Bit rate mode : Constant
Bit rate : 192 kb/s
Channel(s) : 2 channels
Channel layout : L R
Sampling rate : 44.1 kHz
Frame rate : 43.066 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 61.2 MiB (3%)
Title : Audio#Immortal Samsara
Language : Chinese
Default : Yes
Alternate group : 1

Text
ID : 3
Format : VobSub
Codec ID : mp4s-E0
Codec ID/Info : The same subtitle format used on DVDs
Duration : 41 min 57 s
Source duration : 40 min 6 s
Bit rate mode : Constant
Bit rate : 16.4 kb/s
Stream size : 4.69 MiB (0%)
Source stream size : 4.69 MiB (0%)
Title : ViESUB#
Language : Vietnamese
Default : Yes
Forced : No
Alternate group : 3

[hnle1988]

And I'm not really sure how would you use MKVmerge separately since from what I know, it's a part of MKVtool Kit. It's true that MKVtool Kit can read MP4 file, but when I start multiplexing, I got a MKV video that has the hardsub subtitle embedded instead. I'm not sure how would you extract that subtitle from there.

[johns0]

You can't remove hard encoded subs,they are part of the video,all you can do is either bare with them or try to blur them out or you can put in soft subs that can kinda cover them.

[hnle1988]

I don't think the subtitles in my video is hard-sub since I have an option to display them or not. In fact, it seems to me that they are just like softsub but as a different format (Vobsub) . Therefore, what I want to do is extract the file out of the video, which I haven't been able to do it so far.

[johns0]

You did say that your mkv had a hardsub.Use mkvmerge GUI to remove the sub.

[hnle1988]

MKVmerge Gui only works with MKV format. My video is MP4, therefore it do not take it.

[poisondeathray]

You can try mp4box to demux all streams

MP4Box -raw * input.mp4

[johns0]

Mkvmerge works with mp4,i've used it many times with mp4 files.

[hnle1988]

Thanks everyone,

Let me try and I'll let you know ^_^

[hnle1988]

They worked!!!!! Thanks everyone!!!