[FFmpeg-devel] [PATCH] libmodplug wrapper

[Peter Ross]

On Sat, Jul 11, 2009 at 04:27:23AM -0700, Baptiste Coudurier wrote:
> Hi Peter,
>
> On 07/11/2009 02:38 AM, Peter Ross wrote:
>> On Sat, Jul 11, 2009 at 06:11:29AM +0300, Kostya wrote:
>>> On Sat, Jul 11, 2009 at 02:04:08AM +0200, Michael Niedermayer
>>> wrote:
>>>> On Fri, Jul 10, 2009 at 01:24:27PM +0000, Jai Menon wrote:
>>> [...]
>>>> The primary reason for the seperation in this case is so we can
>>>> watch avi/mkv/nut files that have h264 video and mod/s3m/...
>>>> audio
>>> Err, you can legally kill anybody trying to make such perverted
>>> format (i.e. Matroska devs).
>>
>> My reaction is completely the opposite.
>>
>>>> From my experience (several MOD-like and Adlib tracker formats in
>>>> DOS
>>> times), you can represent tracker as two parts: samples and notes.
>>> For a bit modern people - like MIDI file with its own soundfont. So
>>> usually you have hundreds of kilobytes or more of samples (which
>>> may be treated as extradata) and less than 1KB of notes which
>>> define what to play. Also notes are grouped into patterns and
>>> subpatterns which may be repeated certain number of times, with
>>> speed changes that results in each part playing time very greatly
>>> varying. This makes it an awful sound format for generic
>>> container.
>>
>> This suggests to me that FFmpeg's generic container format isn't
>> generic enough.
>
> I don't recall FFmpeg having a generic container format. What do you
> have in mind ?

What I intended to say that the current libavformat/libavcodec API
targets the use of "generic container formats" comprising streams
and time-stamped packets.

MOD-files do not adhere to this generic format. They contain
instrument samples, patterns, and a pattern ordering table.

-- Peter
(A907 E02F A6E5 0CD2 34CD 20D2 6760 79C5 AC40 DD6B)
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