How to demux subtitles from MPEG4

[merunka]

Hello,

I have MP4 (m4v) which was ripped from DVD. It looks like this in ffmpeg:


Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Tribalista.m4v':
Duration: 00:52:37.64, start: 0.000000, bitrate: 1121 kb/s
Stream #0.0(und): Video: mpeg4, yuv420p, 720x352 [PAR 157:180 DAR 157:88], 29.97 tbr, 90k tbn, 30k tbc
Stream #0.1(por): Audio: aac, 48000 Hz, stereo, s16
Stream #0.2(por): Audio: ac3, 48000 Hz, stereo, s16
Stream #0.3(por): Subtitle: mp4s / 0x7334706D
Stream #0.4(eng): Subtitle: mp4s / 0x7334706D
Stream #0.5(und): Subtitle: text / 0x74786574

Does anybody have an idea how to convert it to same MPEG4 with just one sound track and burned ENG subtitles? I've been trying everything, but I can't even demux the subtitles out of MP4 ( Playing works normally, but I would like to just rip a piece of it with subtitles.

thanks!
Kuba

[Baldrick]

Tried yamb?

[merunka]

I'm running under linux, but will try it on my friend's Windows....

so YAMB reports:


Track # 5 Info - TrackID 5 - TimeScale 90000 - Duration 00:50:21.074
Media Info: Language "English" - Type "subp" - Sub Type "mp4s" - 1184 samples
Handler name:
MPEG-4 Config
Unknown (0x38) Stream - ObjectTypeIndication 0xe0
Decoding Buffer size 5028 - Average bitrate 4 kbps - Max Bitrate 3669909 kbps
No stream dependencies for decoding
StreamPriority 0

Computed info from media:
Total size 1573398 bytes - Total samples duration 3019074 ms
Average rate 4 kbps - Max Rate 55 kbps


when trying to extract either to SRT or TTXT, extraction fails with:

Track ID 5 is not a 3GPP text track

[merunka]

Hello,

yupeeee! got it working in Handbrake It's apparently VOBSUB mixed in as MPEG4 stream, which doesn't have a great support...

thanks anyway