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From: Ghislain Baudon <gbaudon@coframi-rennes.com>
To: video4linux-list@redhat.com
Subject: How to write a V4L2 driver to capture MPEG4 / H.263 ?
Date: Wed, 23 Apr 2008 20:23:09 +0200	[thread overview]
Message-ID: <480F7E8D.90209@coframi-rennes.com> (raw)

Hi,

I'm writing a V4L2 driver for a card which capture video in a compressed 
MPEG4 (H.263+) format.
In the VIDIOC_ENUM_FMT, I return the following structure:

const struct v4l2_fmtdesc tsmpeg4_formats[] = {
    {
        .index          = 0,
        .type           = V4L2_BUF_TYPE_VIDEO_CAPTURE,
        .flags          = V4L2_FMT_FLAG_COMPRESSED,
        .description    = "Hardware-encoded MPEG-4",
        .pixelformat    = V4L2_PIX_FMT_MPEG,
   }
};

But several applications (GStreamer, VLC) display an error "unknown 
format 1195724877", and close the dialog.
I have the same behavior with the vivi driver.

How do I declare this MPEG4 compressed format in V4L2?

Thanks for your reading,
Dagonux.
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                 reply	other threads:[~2008-04-23 18:24 UTC|newest]

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