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  1. Originally Posted by dellsam34 View Post
    I'm still interested in DTS testing, With all the tools available to me I haven't been able to demux and remux DTS successfully without sync problems, My next approach is to do DTS HD to DTS without demuxing from the video to avoid sync problems and then convert the video with FFMPEG. Can FFMPEG process videos with DTS soundtrack without altering the DTS soundtrack?
    You can copy audio track - instead '-c:a xxxxcodec' use '-c:a copy' then ffmpeg will copy present audio track unaltered .
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  2. Member dellsam34's Avatar
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    Oh, Okay. That was simple, I will give it a go, Thanks Pandy.
    I have "-acodec ac3" so it should be replaced by "-c:a copy" right?

    Update:
    I converted the .m2ts file's DTS-HD track to DTS using TSMuxerGUI then used the modified commend for DTS and it worked, According to media info I got a .ts file with a DTS soundtrack plays in the computer with no drop outs or sync problems. Now I will have to see if the deck records it and plays it back, Fingers crossed, will report back.
    Last edited by dellsam34; 12th Feb 2019 at 14:30.
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  3. Originally Posted by dellsam34 View Post
    Oh, Okay. That was simple, I will give it a go, Thanks Pandy.
    I have "-acodec ac3" so it should be replaced by "-c:a copy" right?
    Correct, also references to other audio encoding parameters IMHO should be removed (i mean channel configuration, bitrate etc).

    Originally Posted by dellsam34 View Post
    Update:
    I converted the .m2ts file's DTS-HD track to DTS using TSMuxerGUI then used the modified commend for DTS and it worked, According to media info I got a .ts file with a DTS soundtrack plays in the computer with no drop outs or sync problems. Now I will have to see if the deck records it and plays it back, Fingers crossed, will report back.
    Remember to adjust (reduce) video bitrate to match audio bitrate requirements.
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  4. Member dellsam34's Avatar
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    Yeah, The DTS sample as it is didn't record well, only shows frozen frames, I should probably reduce the video bitrate, So DTS is 1509 kb/s so I have to reduce the video bitrate by 1.5Mbps. Let me give it a try.

    No it didn't work, froze to death, I tried two combinations, This:

    HTML Code:
    ffmpeg -i Input.m2ts -c:v mpeg2video -r 30/1.001 -b:v 20500000 -bufsize 9781248 -maxrate 23000000 -bf 2 -sc_threshold -30000 -seq_disp_ext 1 -color_primaries 1 -color_trc 1 -colorspace 1 -dc 10 -me_range 960 -inter_matrix 16,17,18,19,20,21,22,23,17,18,19,20,21,22,23,24,18,19,20,21,22,23,24,25,19,20,21,22,23,24,26,27,20,21,22,23,25,26,27,28,21,22,23,24,26,27,28,30,22,23,24,26,27,28,30,31,23,24,25,27,28,30,31,33 -c:a copy -muxrate 25000000 Output.ts
    Then this:

    HTML Code:
    ffmpeg -i Input.m2ts -c:v mpeg2video -r 30/1.001 -b:v 20500000 -bufsize 9781248 -maxrate 21500000 -bf 2 -sc_threshold -30000 -seq_disp_ext 1 -color_primaries 1 -color_trc 1 -colorspace 1 -dc 10 -me_range 960 -inter_matrix 16,17,18,19,20,21,22,23,17,18,19,20,21,22,23,24,18,19,20,21,22,23,24,25,19,20,21,22,23,24,26,27,20,21,22,23,25,26,27,28,21,22,23,24,26,27,28,30,22,23,24,26,27,28,30,31,23,24,25,27,28,30,31,33 -c:a copy -muxrate 25000000 Output.ts
    None of them worked, This is beyond my scope, Any suggestions?
    Last edited by dellsam34; 14th Feb 2019 at 19:48.
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  5. Originally Posted by dellsam34 View Post
    Yeah, The DTS sample as it is didn't record well, only shows frozen frames, I should probably reduce the video bitrate, So DTS is 1509 kb/s so I have to reduce the video bitrate by 1.5Mbps. Let me give it a try.

    No it didn't work, froze to death, I tried two combinations, This:

    HTML Code:
    ffmpeg -i Input.m2ts -c:v mpeg2video -r 30/1.001 -b:v 20500000 -bufsize 9781248 -maxrate 23000000 -bf 2 -sc_threshold -30000 -seq_disp_ext 1 -color_primaries 1 -color_trc 1 -colorspace 1 -dc 10 -me_range 960 -inter_matrix 16,17,18,19,20,21,22,23,17,18,19,20,21,22,23,24,18,19,20,21,22,23,24,25,19,20,21,22,23,24,26,27,20,21,22,23,25,26,27,28,21,22,23,24,26,27,28,30,22,23,24,26,27,28,30,31,23,24,25,27,28,30,31,33 -c:a copy -muxrate 25000000 Output.ts
    Then this:

    HTML Code:
    ffmpeg -i Input.m2ts -c:v mpeg2video -r 30/1.001 -b:v 20500000 -bufsize 9781248 -maxrate 21500000 -bf 2 -sc_threshold -30000 -seq_disp_ext 1 -color_primaries 1 -color_trc 1 -colorspace 1 -dc 10 -me_range 960 -inter_matrix 16,17,18,19,20,21,22,23,17,18,19,20,21,22,23,24,18,19,20,21,22,23,24,25,19,20,21,22,23,24,26,27,20,21,22,23,25,26,27,28,21,22,23,24,26,27,28,30,22,23,24,26,27,28,30,31,23,24,25,27,28,30,31,33 -c:a copy -muxrate 25000000 Output.ts
    None of them worked, This is beyond my scope, Any suggestions?
    Can't help on this but it can be issue with DTS support... try to replace copy DTS by AC3 creation - if after all video will work then seem DTS is issue (older equipment may not support anything over plain old style DTS).
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  6. Member dellsam34's Avatar
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    My deck is capable of playing back DTS encoded tapes, However not sure about recording it.
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