[FFmpeg-trac] #8872(undetermined:new): implement Cue-Points Chunk for WAV files (RIFF)

FFmpeg trac at avcodec.org
Fri Aug 28 15:08:38 EEST 2020

#8872: implement Cue-Points Chunk for WAV files (RIFF)
             Reporter:  cracki       |                     Type:
                                     |  enhancement
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
 it appears to me that ffmpeg is unaware of 'cue ' chunks in wav files, for
 reading and writing. ffmpeg supports cues or chapter markers for other
 container formats.

 this involves
 - a 'cue ' chunk that contains a table of timestamps (the 'fmt ' chunk may
 be useful to convert sample indices to times)
 - a 'list' 'adtl' chunk that contains 'labl' chunks
 - 'labl' chunks that each contain an index and a string label, which
 describes the given cue point

 the RIFF/WAV file specification details the structures of these chunks. I
 suspect that this doesn't just apply to wav files but also avi files.

 I'll attach a sample file that contains a few cue points.

Ticket URL: <https://trac.ffmpeg.org/ticket/8872>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker

More information about the FFmpeg-trac mailing list