"LAVSplitterSource" shows empty "Chapters"(title) metadata tags for remote file.

[max79]

iTunes can show it fully. Example:
​http://www.electromixes.com/zik/electromix_v120.m4a
Summary of the bug:
ffmpeg version 3.3.3 Copyright (c) 2000-2017 the FFmpeg developers

built with gcc 7.1.0 (GCC)
configuration: --enable-gpl --enable-version3 --enable-cuda --enable-cuvid --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-zlib
libavutil 55. 58.100 / 55. 58.100
libavcodec 57. 89.100 / 57. 89.100
libavformat 57. 71.100 / 57. 71.100
libavdevice 57. 6.100 / 57. 6.100
libavfilter 6. 82.100 / 6. 82.100
libswscale 4. 6.100 / 4. 6.100
libswresample 2. 7.100 / 2. 7.100
libpostproc 54. 5.100 / 54. 5.100

[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000004b2780] stream 0, timescale not set
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '​http://www.electromixes.com/zik/electromix_v120.m4a':

Metadata:

major_brand : M4A
minor_version : 0
compatible_brands: M4A mp42isom
creation_time : 2017-08-26T11:44:04.000000Z
title : electromix 120
artist : yannick burky
genre : EDM
encoder : Fission
date : 2017
track : 0
disc : 0

Duration: 00:59:44.07, start: -19.713700, bitrate: 152 kb/s

Chapter #0:0: start 0.000000, end 19.713700
Metadata:

title : electromixes

Chapter #0:1: start 19.713700, end 192.446900
Metadata:

title :

Chapter #0:2: start 192.446900, end 401.890800
Metadata:

title :

Chapter #0:3: start 401.890800, end 642.844300
Metadata:

title :

Chapter #0:4: start 642.844300, end 872.861200
Metadata:

title :

Chapter #0:5: start 872.861200, end 1068.094600
Metadata:

title :

Chapter #0:6: start 1068.094600, end 1244.798400
Metadata:

title :

Chapter #0:7: start 1244.798400, end 1398.886100
Metadata:

title :

Chapter #0:8: start 1398.886100, end 1563.190400
Metadata:

title :

Chapter #0:9: start 1563.190400, end 1745.258100
Metadata:

title :

Chapter #0:10: start 1745.258100, end 1935.243800
Metadata:

title :

Chapter #0:11: start 1935.243800, end 2250.686800
Metadata:

title :

Chapter #0:12: start 2250.686800, end 2427.390700
Metadata:

title :

Chapter #0:13: start 2427.390700, end 2639.597900
Metadata:

title :

Chapter #0:14: start 2639.597900, end 2801.278500
Metadata:

title :

Chapter #0:15: start 2801.278500, end 3019.847900
Metadata:

title :

Chapter #0:16: start 3019.847900, end 3220.189600
Metadata:

title :

Chapter #0:17: start 3220.189600, end 3435.508300
Metadata:

title :

Chapter #0:18: start 3435.508300, end 3568.930100
Metadata:

title :

Chapter #0:19: start 3568.930100, end 3584.069600
Metadata:

title :

Stream #0:0(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 127 kb/s (default)
Metadata:

creation_time : 2017-08-26T11:44:04.000000Z

Stream #0:1(eng): Data: bin_data (tx3g / 0x67337874), 0 kb/s
Metadata:

creation_time : 2017-08-26T11:44:03.000000Z

Stream #0:2(eng): Video: mjpeg (jpeg / 0x6765706A), yuvj420p(pc, bt470bg/unknown/unknown), 3300x3300 [SAR 72:72 DAR 1:1], 20 kb/s, 0.01 fps, 10k tbr, 10k tbn, 10k tbc (default)
Metadata:

creation_time : 2017-08-26T11:44:03.000000Z
encoder : Photo - JPEG

Stream #0:3(eng): Data: bin_data (tx3g / 0x67337874) (default)
Metadata:

creation_time : 2017-08-26T11:44:04.000000Z

Stream #0:4: Video: png, rgb24(pc), 1400x1400, 90k tbr, 90k tbn, 90k tbc

At least one output file must be specified

[Carl Eugen Hoyos]

Please either explain how this can be reproduced with current FFmpeg git head or explain why it cannot be reproduced.

[max79]

LAVsource_TitleTAG-issue

[max79]

Thank you for response! Don't you see that ffmpeg shows only this:

title :

but it must show like this:

title : ####here a song name####

The problem is that the LAVSource[64-bit] can(sometimes!) show this metatag only on first MPC-HC[64-bit] start attempt all other been unsuccessful. Please look at the pics in attachment.