[FFmpeg-devel] [PATCH v4 0/9] avformat: wav-s337m support + new probe_stream option

[Devin Heitmueller]

On Mon, Oct 5, 2020 at 6:23 AM Nicolas Gaullier
<nicolas.gaullier at cji.paris> wrote:
> dolby_e is a "professional" codec, it is not used for distribution and not supported by end user chips, so the most common formats are :
> - contribution: mpegts (or dvb for satt etc.) with s302m data -> s337m (this could be interesting for ffmpeg to support it)

FYI:  I've got patches to output AC-3 as S337 over the decklink SDI
output.  However doing Dolby-E is harder because the start of the
frames are expected to be aligned with the start of the video frame
(i.e. typically against a VREF signal).  I haven't figured out how to
do this reliably with the decklink APIs, but it might be possible.

Capture of S337 using decklink is a bit easier, although it means
reproducing a bunch of the probing/detection logic found in the other
avformat demuxes.  Passing the data through to the s337m avformat
module might also be an option but it's harder since the s337m module
expects AVIOBufs which is more difficult to provide.

Devin

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Devin Heitmueller, Senior Software Engineer
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