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  1. Member
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    May 2015
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    Australia
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    Hello,

    *Sorry I accidentally posted before I properly wrote the subject/heading.
    I had 2 M4V files my HD Recorder wouldn't play off USB, so as I know it plays .ts using mkvtoolnix I demuxed the video and audio then using "tsMuxeR GUI 2.6.12" combined / output the video and audio as .ts.
    However I've noticed there's a General tab with the 3 options
    1) Mux VBR
    2) Restricted VBR (you can change values)
    3) Mux CBR (you can change values)

    I have always thought muxing together an audio and video file was lossless?, I don't understand how it could be lossless when you can change the values in the 2nd and 3rd options?
    I have used the first option "Mux VBR" which was default, however I've noticed that both of the output .ts files I've made are 100MB larger than the original M4V files I started with.
    Does this all seem lossless?
    As far as I know mkvtoolnix and tsmuxer GUi 2.6.12 only work losslessly?
    Thanks in advance for any info.
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  2. Marsia Mariner
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    Both the MPG and the (M2)TS containers have a lot more overhead than the "normal" containers, which use global headers.
    The transport stream format was designed for digital broadcasting, not for local storage and playback.
    A .ts file with the same contents as an MP4 or MKV will always be bigger than these latter.
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  3. Member
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    Originally Posted by Marsia Mariner View Post
    Both the MPG and the (M2)TS containers have a lot more overhead than the "normal" containers, which use global headers.
    The transport stream format was designed for digital broadcasting, not for local storage and playback.
    A .ts file with the same contents as an MP4 or MKV will always be bigger than these latter.
    OK that's good news!
    Still confused though as to if those 3 bitrate settings are all lossless?
    Thanks
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  4. They are. Leave setting to "Mux VBR", don't worry about the other settings.
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  5. Member
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    Usually my HD Recorder will play off USB .mkv with h264 video and AAC audio.
    But with 2 new videos I have it would jam after the first 5-10 secs in these 2 particular videos.
    That's why I've demuxed the audio / video and made them .ts with tsMuxeR, which now works (however my DVRecorder is having problems fast forwarding / rewinding) but at least it now plays the videos as .ts file.
    I don't know they wouldn't play as h264 AAC audio .mkv's as I've never had that problem before....
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  6. MediaInfo of working and not-working mkv files? Sometimes it is about muxing. Try to add --clusters-in-meta-seek --disable-track-statistics-tags --engage no_cue_duration --engage no_cue_relative_position additional command-line options for mkvmerge.
    https://github.com/mbunkus/mkvtoolnix/wiki/Improving-playback-compatibility-with-players
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  7. Member
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    Thank-You
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