[FFmpeg-devel] [PATCH] Make FFmpeg recognize rawvideo fourCC code issued by FFmpeg

[Michael Niedermayer]

On Sun, Jan 03, 2010 at 10:56:14PM +0100, Stefano Sabatini wrote:
> Hi,
> 
> $ ffmpeg -i toon.avi -pix_fmt pal8 -vcodec rawvideo -y toon-rawvideo.avi
> [...]
> Input #0, avi, from 'toon.avi':
>   Duration: 00:05:52.75, start: 0.000000, bitrate: 23 kb/s
>     Stream #0.0: Video: msvideo1, pal8, 200x100, 8 tbr, 8 tbn, 8 tbc
>     Stream #0.1: Audio: pcm_u8, 22050 Hz, 1 channels, u8, 176 kb/s
> Output #0, avi, to 'toon-rawvideo.avi':
>     Stream #0.0: Video: rawvideo, pal8, 200x100, q=2-31, 200 kb/s, 8 tbn, 8 tbc
>     Stream #0.1: Audio: mp2, 22050 Hz, 1 channels, s16, 64 kb/s
> Stream mapping:
>   Stream #0.0 -> #0.0
>   Stream #0.1 -> #0.1
> [...]
> 
> $ ffmpeg -i toon-rawvideo.avi
> [avi @ 0x98b5390]max_analyze_duration reached
> Input #0, avi, from 'toon-rawvideo.avi':
>   Duration: 00:00:15.25, start: 0.000000, bitrate: 1353 kb/s
>     Stream #0.0: Video: WRAW / 0x57415257, 200x100, 8 fps, 8 tbr, 8 tbn, 8 tbc
>     Stream #0.1: Audio: mp2, 22050 Hz, 1 channels, s16, 64 kb/s
> At least one output file must be specified
> 
> The rawvideo encoder (libavcodec/rawenc.c:raw_init_encoder) writes the
> WRAW fourCC read from:
> libavcodec/raw.c:ff_raw_pixelFormatTags
> 
> in the codec context, then the avi demuxer cannot recognize the fourCC
> tag 'WRAW' as it is not defined in:
> libavformat/riff.c:ff_codec_bmp_tags.

fix the muxer or encoder!

> 
> The result is that the ff* tools cannot correctly recognize the format
> of the video stream issued by FFmpeg.
> 
> Patch adds all the fourCC codes defined in libavcodec/raw.c missing
> from libavformat/riff.c.

this is completely unacceptable

read teh avi spec and the lists of fourccs that are valid in avi
storing anything else than that is a bug

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

If you really think that XML is the answer, then you definitly missunderstood
the question -- Attila Kinali
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