How convert MKV file with different mkv LEVEL (5.1 to 4.0..)

[Nabucanezor]

Hi, I have a some movies in MKV format level 4.1 and 5.1 and I need convert them to different mkv level what is older version, for examle 4.0 level. MKV movie what I have in 5.1 level I don't play in the my TV Samsung 40C5000 (LED). The TV shows unrealbe codec or unknown format.
I using to play in the TV external disc 320GB A-data, connect to USB hdd port in TV.
I find to this forum software tsmuxer, it's goot but mkv convert to reable on my TV only to .ts file what don't have a subtitles.
I neet convert mkv turn on mkv same only change different mkv level.

Please to help me. Thanks

[Baldrick]

I would reconvert, use for example uncropmkv and you can choose h264 level profile. It will only reconvert the video.

[Nabucanezor]

Thanks.
Do you know how to do it by this way? Of this thread https://forum.videohelp.com/threads/328736-convert-mkv-from-level-5-1-to-level-4-1 with FFmpeg.
Command: ffmpeg -i startrek.mkv -vcodec copy -acodec copy -vbsf h264_changesps=level=41 startrek1.mkv not work. I placed the mkv file to the ffmpeg/bin directory. It shows: Unknown bitstream filter h264_change.....

[therock003]

I would reconvert, use for example uncropmkv and you can choose h264 level profile. It will only reconvert the video.

You mean it will not re-encode/transcode video?

[Baldrick]

No, it will reconvert. You have to use ffmpeg with the copy option to just change the headers, see https://www.doom9.org/showthread.php?t=152419 as nabu mentions.

[therock003]

I dont understand the difference between reconvert and rencode. Do you mean that only headers changes and not video information?

BTW i used uncropmkv and it seems it only supports certain resolutions. I had a 5.1 file that had res 1920x800 and it didnt handle it...

[Baldrick]

Reconvert=reencode.

[smitbret]

You can change the level without reencoding. My PS3 doesn't have much use for .mkv so I end up converting to .m2ts. Just open your .mkv file in Tsmuxer, select the video stream and you'll be able to select a box and change the level. Then I remux (not re-encode) into an .m2ts. You could achieve the same thing by just demuxing and Tsmuxer will change the Level doing that. Just remux with mkvmerge and you're good to go. Shouldn't take more than a few minutes.

[therock003]

Just tried downconverting 5.1 to 4.1 and it didnt work either way. Neither via showtime for PS3, nor as an .m2ts file running directly from XMB. It still came up as a black screen.

[smitbret]

Just tried downconverting 5.1 to 4.1 and it didnt work either way. Neither via showtime for PS3, nor as an .m2ts file running directly from XMB. It still came up as a black screen.

Run it through mediainfo and post the results

[therock003]

yeah sure. Possibly the 8 frames at 1080p cause the problem?

General
Unique ID                        : 180848280637084093336661831834829007492 (0x880E1CA5EFC11309B59B2F55C7672A84)
Complete name                    : D:\HD Movies\Ratatouille.mkv
Format                           : Matroska
Format version                   : Version 1
File size                        : 6.56 GiB
Duration                         : 1h 50mn
Overall bit rate                 : 8 495 Kbps
Encoded date                     : UTC 2007-11-27 23:03:19
Writing application              : mkvmerge v2.0.2 ('You're My Flame') built on Feb 21 2007 23:40:55
Writing library                  : libebml v0.7.7 + libmatroska v0.8.1

Video
ID                               : 3
Format                           : AVC
Format/Info                      : Advanced Video Codec
Format profile                   : High@L5.1
Format settings, CABAC           : Yes
Format settings, ReFrames        : 8 frames
Format settings, GOP             : N=1
Codec ID                         : V_MPEG4/ISO/AVC
Duration                         : 1h 50mn
Bit rate                         : 6 984 Kbps
Width                            : 1 920 pixels
Height                           : 800 pixels
Display aspect ratio             : 2.40:1
Frame rate                       : 23.976 fps
Color space                      : YUV
Chroma subsampling               : 4:2:0
Bit depth                        : 8 bits
Scan type                        : Progressive
Bits/(Pixel*Frame)               : 0.190
Stream size                      : 5.26 GiB (80%)
Writing library                  : x264 core 56 svn-682C
Encoding settings                : cabac=1 / ref=5 / deblock=1:0:0 / analyse=0x3:0x133 / me=umh / fpel_cmp=sad / subme=5 / me-prepass=0 / brdo=0 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=2 / deadzone=4,6 / chroma_qp_offset=0 / threads=3 / nr=0 / decimate=1 / mbaff=0 / bframes=3 / b_pyramid=1 / b_adapt=1 / b_bias=0 / direct=3 / wpredb=1 / bime=1 / keyint=250 / keyint_min=25 / scenecut=40(pre) / rc=2pass / bitrate=6984 / ratetol=1.0 / rceq='blurCplx^(1-qComp)' / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / pb_ratio=1.30 / aq=1:0.3:15.0
Default                          : Yes
Forced                           : No

Audio
ID                               : 2
Format                           : DTS
Format/Info                      : Digital Theater Systems
Codec ID                         : A_DTS
Duration                         : 1h 50mn
Bit rate mode                    : Constant
Bit rate                         : 1 510 Kbps
Channel(s)                       : 6 channels
Channel positions                : Front: L C R, Side: L R, LFE
Sampling rate                    : 48.0 KHz
Bit depth                        : 24 bits
Compression mode                 : Lossy
Stream size                      : 1.17 GiB (18%)
Language                         : English
Default                          : Yes
Forced                           : No

Text
ID                               : 1
Format                           : UTF-8
Codec ID                         : S_TEXT/UTF8
Codec ID/Info                    : UTF-8 Plain Text
Language                         : English
Default                          : No
Forced                           : No

[johns0]

Re-encode the blu-ray using 3 frames instead.

[therock003]

What are reference frames and why do they seem to matter that much?

[jagabo]

What are reference frames and why do they seem to matter that much?

http://en.wikipedia.org/wiki/Reference_frame_%28video%29

More reference frames require more memory (all those frames have to be in memory) and processing time.

[therock003]

The first thing i noticed (and i suspected as much) is where it says it is part of compressed video. So an uncompressed iso, or original blu-ray disc wont use reference frames? So does that mean that uncompressed blu-rays run better and faster?

[jagabo]

So an uncompressed iso, or original blu-ray disc wont use reference frames?

All Blu-ray discs contain h.264, MPEG 2, or VC-1 compressed video. They all utilize inter-frame encoding and use reference frames. Professionally produced discs always use settings that are Blu-ray player compatible. A straight rip (no additional compression) will always be Blu-ray compatible as far as the video and audio streams are concerned. That doesn't mean all Blu-ray players will play the files because they don't have to support anything other than Blu-ray authored discs. They don't have to play MKV, MP4, or whatever, files.

[thegeeman]

I have a some movies in MKV format level 4.1 and 5.1 and I need convert them to different mkv level what is older version, for examle 4.0 level

Agree with smitbret; change profile in tsmuxer to 4.1; no encoding needed.

I find to this forum software tsmuxer, it's goot but mkv convert to reable on my TV only to .ts file what don't have a subtitles.
I neet convert mkv turn on mkv same only change different mkv level.

I'm assuming for the above that you need to have a 'new' mkv file with a 4.1 profile AND also subtitles. So, set tsmuxer to demux. With the ts streams, simply open up and then add the streams into mkvmerge; press start and voila, a mkv file (with your subtitles if needed).

[jagabo]

H264 Level Editor only changes the profile flag in the header. If the video actually uses High@5.1 features it will not play properly in a High@4.1 player.

[rronald_25]

I hope this thread still valid.
So, im converting / reencode (I dunno the correct term of it) from 5.1 to 4.1 using tsmuxer
The output is .ts.


Then I remux again with mkvmerge to mkv


So far it works, it took only +-10sec for 20min video 480p to .ts and another 10sec to.mkv, and with mediainfo it looks like the only thing changed is the level


Now the problem is, tsmuxer seems not to recognize the subtitle & chapters embedded in the original mkv file, so I had to merge 2 mkv files (the original & the output) in order to get the subtitle & the chapters.
Am I doing something wrong here?


Thanks

[johns0]

Nope,that's the correct way,nothing was encoded,you just had to do a bunch of remuxing.