Changes between Version 5 and Version 10 of Ticket #10345


Ignore:
Timestamp:
May 6, 2023, 9:45:24 PM (3 years ago)
Author:
Noitarud
Comment:

(For some reason it has disabled "reply") Since opening, I have found it has been hard to clarify what I really want with this and I forgot your requirements, encapsulated irrelevant things to ffmpeg.

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  • Ticket #10345

    • Property Summary Multiplex Filter (or codec) → New filter for de-Multiplexing recorded mono audio
    • Property Status new → reopened
    • Property Keywords Multiplex added

  • Ticket #10345 – Description

    v5 v10  
    55Would you like to create a filter, since this would also work with mono VHS taped recordings of television:
    66•Decode mono-multiplex to stereo
     7•subtitles may also be acquirable (FM? I do not have info for stereo, only quad (see Comment 6), FM radio should have some embedded things. For TV, they are probably using teletext, which could become another FFMPEG filter idea).
    78
     9Cons:
     10•I do not think Quad is in active use (despite modern cars being equipped with four speakers), so decode to quad is not necessary.
     11•niche, and people may assume if acquired in mono there is no way you could get stereo.
     12•TV stereo may be implemented different to FM stereo, I have not yet tested Stereo TV modulators.
     13•have not tested with VHS recordings or audio cassette to see if retained.
     14•analog TV is outdated
     15
     16
     17(The rest is not related to ffmpeg, but would be useful elsewhere)
     18
     19{{{
    820For these two functions,
    921•Encode stereo to mono-multiplex
    … …  
    1123Better to create an output filter (like WaveOut) or as FFDSHOW filter, so all MP3s and such can be played without file conversion.
    1224
    13 And consider a codec, the monaural stream could confer benefits, and for the stream's decoder, have either full decode or decode to mono-multiplex (for stereo or quadrophonic FM receivers). I have seen such a quad-radio-receiver some time back but I do not plan to follow this ticket and wait to test though.
     25And consider a codec, the monaural stream could confer benefits, and for the stream's decoder, have either full decode [or decode to mono-multiplex (for stereo or quadrophonic FM receivers) - not required if can Encode output sound, may assist troubleshooting].
     26}}}