Is a screen grab of mp3 chapters in VLC on Windows, taken from the Internet. I’m still working out how to view them in VLC on Mac OS.
I’m led to believe that VLC, Windows Media Player (supports chapter images) and also Ubuntu’s default video player (supports chapter images and titles) all should work. I’m trying to confirm that.
But I wonder: the Windows user base of Audacity creates files for -their- audience, and focusing only on what Windows support exists may be in error. What are their users using, and who are they producing for? It’s probably more diverse, consisting of mobile (iOS, Android) if they’re producing podcasts.
It’s been a part of the spec since 2005. Enough clients support it, especially on mobile, that I’m getting asked regularly by the listeners of the podcast that I produce to adopt chapters. They allow listeners to find specific parts in a media file they are interested in and make my podcasts more likely to be discovered by new listeners. Some tell me that they don’t want to listen to podcasts that don’t adopt chapters, having experienced them.
I can’t speak to the podigree file, but I produced this one last night which does work in Overcast, and should work in other players that implement the spec. http://www.podtrac.com/pts/redirect.mp3/feeds.soundcloud.com/stream/618421383-appleinsider-com-blondie-steve-jobs-jimmy-iovine-jimmy-destri.mp3 - I edited the file in Audacity, created the labels in Audacity, exported the labels as txt, and then paid for credits to Auphonic.com to use their tool to take the txt file and add the labels as chapters to the mp3 file. (Auphonic does a lot of other things, like level gain, noise reduce, and so on - but all I needed it for in this case was embedding the labels as chapters, because Audacity doesn’t.
ffmpeg -i FILENAME should confirm the file has added chapters. I downloaded MediaInfo to see what you’re seeing - MediaInfo does not appear to display the chapters, but I have verified that I can see them using FFmpeg.
In the file linked above, the FFmpeg -i output is:
Input #0, mp3, from '/Users/vmarks/Downloads/ai pod/05092019 ai podcast.mp3':
title : Blondie, Steve Jobs, Jimmy Iovine & Jimmy Destri
encoded_by : auphonic.com
artist : AppleInsider Podcast
date : 2019
Duration: 00:32:35.71, start: 0.025056, bitrate: 112 kb/s
Chapter #0:0: start 6.919000, end 63.220000
title : Opener
Chapter #0:1: start 63.220000, end 642.801000
title : Introduction: Jimmy Destri
Chapter #0:2: start 642.801000, end 725.750000
title : I know music, and I know addiction
Chapter #0:3: start 725.750000, end 839.764000
title : Analog synths to digital and laptops
Chapter #0:4: start 839.764000, end 896.441000
title : Garageband
Chapter #0:5: start 896.441000, end 963.603000
title : Today, anybody can make a record
Chapter #0:6: start 963.603000, end 1057.966000
title : iTunes really covered our asses
Chapter #0:7: start 1057.966000, end 1128.453000
title : Spotify
Chapter #0:8: start 1128.453000, end 1149.962000
title : You trust Apple...
Chapter #0:9: start 1149.962000, end 1333.264000
title : What is Facebook's responsibility to their users
Chapter #0:10: start 1333.264000, end 1498.773000
title : Apple News
Chapter #0:11: start 1498.773000, end 1700.850000
title : Who's going to be Apple's competitor in the future?
Chapter #0:12: start 1700.850000, end 1744.183000
title : Steve Jobs parked anywhere he wants
Chapter #0:13: start 1744.183000, end 1955.677000
title : Jimmy Iovine told me some Steve Jobs stories
Stream #0:0: Audio: mp3, 44100 Hz, stereo, fltp, 112 kb/s
encoder : LAME3.99r
replaygain: track gain - -6.100000, track peak - unknown, album gain - unknown, album peak - unknown,
Stream #0:1: Video: mjpeg (Baseline), yuvj420p(pc, bt470bg/unknown/unknown), 900x900 [SAR 1:1 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
comment : Cover (front)
This matches up well with my label track.txt file (Auphonic appears to round the numbers):
6.919116 6.919116 Opener
63.220385 63.220385 Introduction: Jimmy Destri
642.801768 642.801768 I know music, and I know addiction
725.750799 725.750799 Analog synths to digital and laptops
839.764525 839.764525 Garageband
896.441869 896.441869 Today, anybody can make a record
963.603922 963.603922 iTunes really covered our asses
1057.966303 1057.966303 Spotify
1128.453512 1128.453512 You trust Apple...
1149.962145 1149.962145 What is Facebook's responsibility to their users
1333.264823 1333.264823 Apple News
1498.773451 1498.773451 Who's going to be Apple's competitor in the future?
1700.850295 1700.850295 Steve Jobs drove himself
1744.183697 1744.183697 Jimmy Iovine told me some Steve Jobs stories
I wonder if something that works like https://github.com/jcs/mp3chap could be used here to make it easier to integrate it into Audacity- the output of the labels txt file piped to it as a part of exporting the file to mp3?
Thanks for logging my vote and having read this far. I’m trying to figure out how to satisfy my listener’s requests for this feature, and being able to do it all within Audacity is very desirable for me.