[Vorbis-dev] Enhanced Podcasts with Ogg Vorbis (Chapter Marks)

Ian Malone ibmalone at gmail.com
Sat Apr 14 16:36:23 PDT 2012

On 13 April 2012 10:04, Silvia Pfeiffer <silvia at silvia-pfeiffer.de> wrote:
> For those of you wanting to do experiments, get yourself a file from
> http://www.vorbis.com/music/ and run the vorbiscomment program (which
> you can get from the vorbis-tools package). Use a base64 encoded image
> (I have a command-line tool called "base64") as the value of a field
> (e.g. call the field BLOCK_PICTURE) for the vorbiscomment program.
> Repeat that until you get a file that your HW player doesn't play any
> more.

Sansa Clip+ 8GB,
Somewhere between a 486K and 635K comment the Clip+ locks up. This
appears to be related to total comment size rather than individual
tags. In the following xxpc refers to the image size, 2x and 3x
indicate multiple METADATA_BLOCK_PICTURE entries.
729K  3x30pcsize - crash *
635K  50pcsize - crash
486K  2x30pcsize - okay
480K  45pcsize - okay

* crash occurs whether or not replaygain is enabled, this is the only
one I've tested that for.

In the case of crashes the player freezes, holding down the down
button is required to turn it off. It then takes longer than normal to
start up again, seems to do a reset to an earlier state. Total file
size was 4.5M (3x30pc), 4.4M (50pc), 4.2M (45pc/2x30pc). I used the
Hydrate-Kenny_Beltrey.ogg file for testing.


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