help me figure out what's wrong with this audio track

[monk87]

N_m3u8dl-re https://r.cdn-ncplus.pl/vod/store01/ALE_44120402/_/hd4-hssdrm02.ism/Manifest --key 34d572450b2342c8997520fa9ea95fcd:137bbc22fc85123f2198095bf0241416 -M format=mp4 --save-name kot

i'm having a really strange case.

there are 2 audio tracks:

23:33:47.429 INFO : Aud *CENC Polski | 192 Kbps | ec-3 | pol | 6CH | 184 Segments | ~06m07s
23:33:47.431 INFO : Aud *CENC Polski | 128 Kbps | mp4a.40.2 | pol | 2CH | 184 Segments | ~06m08s

and when i try to grab the first one i get muxing errors

23:41:14.040 WARN : [aac @ 000001943c2cd3c0] Audio object type 0 is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it
means that your file has a feature which has not been implemented.
23:41:14.044 WARN : [mov,mp4,m4a,3gp,3g2,mj2 @ 000001943e77f300] Failed to open codec in avformat_find_stream_info
23:41:14.045 WARN : [aac @ 000001943c2cd3c0] Audio object type 0 is not implemented. Update your FFmpeg version to the newest one from Git. If the problem still occurs, it
means that your file has a feature which has not been implemented.
23:41:14.046 WARN : [mov,mp4,m4a,3gp,3g2,mj2 @ 000001943e77f300] Could not find codec parameters for stream 0 (Audio: aac (ec-3 / 0x332D6365), 96000 Hz, 0 channels, fltp,
192 kb/s): unspecified number of channels
23:41:14.048 WARN : Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options
23:41:14.049 WARN : [mp4 @ 000001943e6c43c0] track 1: codec frame size is not set
2

any clues?
i mean i know i can use the second audio and it works fine but i'd like to know what is the problem with this (it's decoded fine, i checked the file in cache dir and it's playable)

also how can i force N_M3u8DL-RE to grab the second track from command line ?
tried with

-sa codec="mp4a.40.2":lang="pol":br=128|channels="2"

(and with all those options separate)
but it always downloads the first one

[lomero]

for mux error the error is clear from output log. update ffmpeg

if does not work, and also about your audio error (second issue), just for 1 video only, forget your trouble, use simply clever-FFmpeg-GUI and mux video, audio 1 and audio 2 (or just video+audio 1 only)

on end, about issue on second audio, try only -sa codec="mp4a.40.2"

[monk87]

for mux error the error is clear from output log. update ffmpeg

if does not work, and also about your audio error (second issue), just for 1 video only, forget your trouble, use simply clever-FFmpeg-GUI and mux video, audio 1 and audio 2 (or just video+audio 1 only)

on end, about issue on second audio, try only -sa codec="mp4a.40.2"

well this is pretty fucked up
1. clever ffmpeg gui is not working for this audio file (and i have newest ffmpeg windows build from here https://github.com/BtbN/FFmpeg-Builds/releases

2. adding codec also fails because it downloads the 6ch audio


foobar is able to play it, it says it's "ATSC A/52B (AC-3, E-AC-3)" in codec info

https://gofile.io/d/cDuWCP here's audio/video & manifest just in case

[lomero]

run just RE "link" key
and choose manually your res video and audio too (e-ac-3). still fails on final mux? have you update ffmpeg ?

[ProWo]

The header of the eac3 file has been manipulated.
Here is a working version you can mux.

[forget]

Get the second audio track

N_m3u8DL-RE https://r.cdn-ncplus.pl/vod/store01/ALE_44120402/_/hd4-hssdrm02.ism/Manifest --key 34d572450b2342c8997520fa9ea95fcd:137bbc22fc85123f2198095bf0241416 -sv best --select-audio bwMax=128 -mt -M mp4 --save-name kot

[monk87]

ok after checking with mp4info

File:
  major brand:      isml
  minor version:    1
  compatible brand: iso5
  compatible brand: iso6
  compatible brand: piff
  compatible brand: msdh
  fast start:       yes

Movie:
  duration:   3680000000 (movie timescale units)
  duration:   368000 (ms)
  time scale: 10000000
  fragments:  yes

Found 1 Tracks
Track 1:
  flags:        7 ENABLED IN-MOVIE IN-PREVIEW
  id:           3
  type:         Audio
  duration: 368000 ms
  language: pol
  media:
    sample count: 0
    timescale:    10000000
    duration:     3680000000 (media timescale units)
    duration:     368000 (ms)
    bitrate (computed): 192.000 Kbps
    sample count with fragments: 11500
    duration with fragments:     3680000000
    duration with fragments:     368000 (ms)
  Sample Description 0
    Coding:       ec-3 (Dolby Digital Plus (Enhanced AC-3))
    Codec String: ec-3
    Sample Rate: 48000
    Sample Size: 16
    Channels:    2
    E-AC-3 Data Rate: 0
    E-AC-3 Substream 0:
        fscod       = 0
        bsid        = 0
        bsmod       = 0
        acmod       = 0
        lfeon       = 0
        num_dep_sub = 0
        chan_loc    = 0
    Dolby Digital Plus with Dolby Atmos: No
    E-AC-3 dec3 payload: []

it turned out to be a isml container.
so what i came up with is a fix with mp4box

                fixed_audio = audio_path[:-5] + "_fixed.ec3"

                mp4box_cmd = [
                    "MP4Box",
                    "-raw", "3",
                    audioStream.demuxedFile,
                    "-out", fixed_audio
                ]

                result = subprocess.run(
                    mp4box_cmd,
                    stdout=subprocess.PIPE,
                    stderr=subprocess.PIPE,
                    text=True
                )

and this fixed file can be merged with mkvmerge without any problem

Muxing with mkvmerge (EC-3 / MP4 container)...
['C:\\temp/bin/mkvmerge.exe', '-o', 'C:\\temp/output\\Kot.mkv', '--no-audio', 'C:\\temp/cache\\80081af8dde2d5777eaccf5d925fafea\\demuxed_video.mp4', '--no-video', '--no-subtitles', '--audio-tracks', '0', '--language', '0:pol', 'EC-3_pol_demuxed_audio_fixed.ec3']
mkvmerge v63.0.0 ('Everything') 32-bit
'C:\temp\cache\80081af8dde2d5777eaccf5d925fafea\demuxed_video.mp4': Using the demultiplexer for the format 'QuickTime/MP4'.
'EC-3_pol_demuxed_audio_fixed.ec3': Using the demultiplexer for the format 'AC-3'.
'C:\temp\cache\80081af8dde2d5777eaccf5d925fafea\demuxed_video.mp4' track 0: Using the output module for the format 'AVC/H.264'.
'EC-3_pol_demuxed_audio_fixed.ec3' track 0: Using the output module for the format 'AC-3'.
The file 'C:\temp\output\Kot.mkv' has been opened for writing.
'C:\temp\cache\80081af8dde2d5777eaccf5d925fafea\demuxed_video.mp4' track 0: Extracted the aspect ratio information from the MPEG-4 layer 10 (AVC) video data and set the display dimensions to 1920/1080.
Progress: 100%
The cue entries (the index) are being written...
Multiplexing took 1 second.

thanks for all the other ideas