#9996: When remuxing dolby atmos mkv to mp4, complexity index is not present. -------------------------------------+---------------------------------- Reporter: BlueWindy | Owner: (none) Type: defect | Status: open Priority: normal | Component: ffmpeg Version: unspecified | Resolution: Keywords: | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | -------------------------------------+---------------------------------- Comment (by Balling): Looks as follow: near AudioFormat = ec-3 there is Unknown_dec3, what is called EAC3SpecificBox dec3 there flag_ec3_extension_type_joc and joc_complexity_index. I would imagine this would require parsing of eac3. {{{ 0001BE Audio (51 bytes) 0001BE Header (8 bytes) 0001BE Size: 51 (0x00000033) 0001C2 Name: ec-3 0001C6 Reserved: 0 (0x0000000000000000) 0001CC Data reference index: 1 (0x0001) 0001CE reserved (0): 0 (0x00000000) 0001D2 reserved (0): 0 (0x00000000) 0001D6 channelcount (2): 2 (0x0002) 0001D8 samplesize (16): 16 (0x0010) 0001DA pre_defined (0): 0 (0x0000) 0001DC reserved (0): 0 (0x0000) 0001DE samplerate: 48000 (0xBB80) 0001E0 samplerate (0): 0 (0x0000) 0001E2 EAC3SpecificBox (15 bytes) 0001E2 Header (8 bytes) 0001E2 Size: 15 (0x0000000F) 0001E6 Name: dec3 0001EA data_rate: 768 (0x0300) - (13 bits) 0001EB num_ind_sub: 0 (0x0) - (3 bits) 0001EC independent substream (3 bytes) 0001EC fscod: 0 (0x0) - (2 bits) 0001EC bsid: 16 (0x10) - (5 bits) 0001EC reserved: No 0001ED asvc: No 0001ED bsmod: 0 (0x0) - (3 bits) 0001ED acmod: 7 (0x7) - (3 bits) 0001ED lfeon: Yes 0001EE reserved: 0 (0x0) - (3 bits) 0001EE num_dep_sub: 0 (0x0) - (4 bits) 0001EE reserved: No 0001EF reserved: 0 (0x0) - (7 bits) 0001EF flag_ec3_extension_type_joc (2 bytes) 0001EF flag_ec3_extension_type_joc: Yes 0001F0 joc_complexity_index: 16 (0x10) - (8 bits) 0001F1 Time to Sample (24 bytes) }}} -- Ticket URL: <https://trac.ffmpeg.org/ticket/9996#comment:3> FFmpeg <https://ffmpeg.org> FFmpeg issue tracker