[FFmpeg-devel] [RFC][PATCH] Windows Television (WTV) file system handling

[Aurelien Jacobs]

On Mon, Jan 10, 2011 at 08:30:33PM +1100, Peter Ross wrote:
> On Sun, Jan 09, 2011 at 11:39:00PM +0100, Aurelien Jacobs wrote:
> > On Sun, Jan 09, 2011 at 05:21:20PM +1100, Peter Ross wrote:
> > > Hi,
> > > 
> > > The Windows Television (WTV) file format is a more complex beast than
> > > initially imagined.
> > > 
> > > [...]
> > > 
> > > * Meta data is parsed. While it is able to extract a thumbnail image, I
> > >   have ifdef'd this out, as ffmpeg forbids image attachments using 
> > >   AVMEDIA_TYPE_ATTACHMENT.
> > 
> > I'm not sure what you are talking about here. I don't know what ffmpeg
> > forbids, but image attachments seems to work fine with this sample file:
> > http://samples.mplayerhq.hu/Matroska/ticket-a_aac.mkv
> 
> My mistake. It is ffprobe that reports codec id mismatch error, e.g.
> 
> ---
> [matroska,webm @ 0x8be4fd0] max_analyze_duration reached
> [matroska,webm @ 0x8be4fd0] Estimating duration from bitrate, this may be inaccurate
> Input #0, matroska,webm, from 'ticket-a_aac.mkv':
>   Metadata:
>     title           : Un ticket pour l'espace
>   Duration: 00:00:50.00, start: 0.000000, bitrate: N/A
>     Chapter #0.0: start 0.000000, end 50.006000
>     Metadata:
>       title           : 01. G?n?rique de d?but
>     Stream #0.0(fre): Video: h264, yuv420p, 688x288, PAR 36:37 DAR 86:37, 25 fps, 25 tbr, 1k tbn, 50 tbc
>     Stream #0.1(fre): Audio: aac, 48000 Hz, 5.1, s16
>     Stream #0.2: Attachment: mjpeg
>     Metadata:
>       filename        : Affiche du film.jpg
>     Stream #0.3: Attachment: mjpeg
>     Metadata:
>       filename        : Cover DVD HD.jpg
>     Stream #0.4: Attachment: [0][0][0][0] / 0x0000
>     Metadata:
>       filename        : tm.ttf
> [mjpeg @ 0x8beca20] codec type or id mismatches
> Error while opening codec for input stream 2
> [mjpeg @ 0x8c1e310] codec type or id mismatches
> Error while opening codec for input stream 3

This don't have much to do with the demuxer and is not a good reason to
disable the code in the demuxer.
It is also quite simple to fix this error with attached patch but I
don't know if it is acceptable.

> It doesnt complain for stream #0.4 (ttf), only the jpeg ones.

It also complain for stream #0.4 but for a different (and expected) reason:
Unsupported codec (id=98304) for input stream 4

Aurel
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