[FFmpeg-devel] [PATCH 9/9] ffplay: add -af option

Marton Balint cus at passwd.hu
Sat Feb 23 00:52:13 CET 2013

On Fri, 22 Feb 2013, Stefano Sabatini wrote:

> On date Thursday 2013-02-21 20:28:33 +0100, Marton Balint encoded:
> [...]
>> On Tue, 5 Feb 2013, Marton Balint wrote:
>>>> From b03a8a5c31dbf600bb55d8381bb5eeac0c0e91e1 Mon Sep 17 00:00:00 2001
>>>> From: Stefano Sabatini <stefasab at gmail.com>
>>>> Date: Sun, 3 Feb 2013 21:29:01 +0100
>>>> Subject: [PATCH] ffplay: add -af option
>>>> ---
>>>> doc/ffplay.texi |    6 ++
>>>> ffplay.c        |  194
>>>> +++++++++++++++++++++++++++++++++++++++++++++++++++----
>>>> 2 files changed, 188 insertions(+), 12 deletions(-)
>> Stefano, were you able to work on this? If not, I may will have a
>> little time to make the proposed changes if that's ok with you.
> Sure, I'm not likely to work on it on this weekend, so feel free to do
> it (I'd like to finalize sox and ladspa wrappers just after this).

Okay, here is a new version, with the proposed changes. Some issues we 
still need to figure out:

- What about unknown channel layout? FFplay was able to play it, by using 
the default channel layout from the number of channels, now abuffer bails 
out with an error.

- At the moment I can't specify the required sample rate to an audio 
buffersink. Is there a planned patch for that? Or we should use a separate 
aformat filter to force an output sample rate?

- Something is not right with the auto inserted filters and ebur128, i 
suspect this is not an ffplay issue, rather an avfilter or ebur128. For 
example this generates a broken output:
ffplay stereomusic.mp3 -af ebur128,aformat=channel_layouts=mono

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