[Ffmpeg-devel] JPEG support in ffmpeg

[Chris Wilson]

Hi all,

On Thu, 8 Jun 2006, Chris Wilson wrote:

> First of all, thanks for writing ffmpeg. It looks like exactly the tool that 
> I want, to assemble multiple JPEG files from a time-lapse sequence into a 
> video file. Unfortunately, it doesn't work for me:
>
> The manual page says "FFmpeg can use any supported file format and protocol 
> as input". But this does not seem to be true:
>
> chris at rocio:/tmp/ffmpeg$ ./ffmpeg -i ~/photos/raw/img_5834.jpg foo.mpg
> FFmpeg version CVS, Copyright (c) 2000-2004 Fabrice Bellard
>  configuration:
>  libavutil version: 49.0.0
>  libavcodec version: 51.9.0
>  libavformat version: 50.4.0
>  built on Jun  8 2006 18:29:38, gcc: 4.0.2 20050808 (prerelease) (Ubuntu 
> 4.0.1-4ubuntu9)
> /home/chris/photos/raw/img_5834.jpg: Unknown format
>
> chris at rocio:/tmp/ffmpeg$ ./ffmpeg -formats
> FFmpeg version CVS, Copyright (c) 2000-2004 Fabrice Bellard
> [...]
> Image formats (filename extensions, if any, follow):
> DE jpeg   jpg,jpeg
> DE gif    gif
>
> This is after I hacked the source to enable the line that says:
>
> av_register_image_format(&jpeg_image_format);
>
> I'm surprised that JPEG is not listed as a supported file format, although it 
> is listed as an image format. Perhaps that is the missing piece? Or else I 
> just misunderstood the container/codec situation?
>
> print_error() also implies that reading JPEG files should be supported:
>
> void print_error(const char *filename, int err)
> {
>    switch(err) {
>    case AVERROR_NUMEXPECTED:
>        fprintf(stderr, "%s: Incorrect image filename syntax.\n"
>                "Use '%%d' to specify the image number:\n"
>                "  for img1.jpg, img2.jpg, ..., use 'img%%d.jpg';\n"
>                "  for img001.jpg, img002.jpg, ..., use 'img%%03d.jpg'.\n",
>                filename);
>        break;
>
> Thanks in advance for any help or advice.
>
> Cheers, Chris.

Bump? Any ideas on this problem?

Cheers, Chris.
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