[gst-devel] Which CODEC for mjpg?

Michael Smith msmith at xiph.org
Mon Nov 29 20:39:09 CET 2010


You already said it was an AVI file, so I don't know why you're now
trying to decode it without an avi demuxer.

As I said previously, the problem is clearly that the AVI demuxer
isn't recognising this FOURCC, and fixing that would make it work.

Mike


On Mon, Nov 29, 2010 at 11:13 AM, Brian Michalk <michalk at awpi.com> wrote:
> I have also tried
>
> gst-launch -v filesrc location=<my file> ! jpegdec ! ffmpegcolorspace !
> ximagesink
>
> And it terminates without error after about a millisecond, but doesn't
> show any video.  I can play this file in VLC.
>
> On 11/29/2010 12:46 PM, Michael Smith wrote:
>> JPEG is decoded by the 'jpegdec' element, in the jpeg plugin.
>>
>> The problem you're describing sounds like the AVI demuxer doesn't
>> recognise this file as containing jpeg, though. Perhaps another
>> mapping entry needs adding to the riff lib.
>>
>> Mike
>>
>>
>> On Mon, Nov 29, 2010 at 10:28 AM, Brian Michalk<michalk at awpi.com>  wrote:
>>> I am trying to put together a gst-launch pipeline to play some AVI
>>> files.  I'm using
>>>
>>> gst-launch -v uri=<my input filename>
>>>
>>> And the errors it returns:
>>> *** Message: don't know how to handle video/x-avi-unknown,
>>> fourcc=(fourcc)mjpg
>>> ERROR: from element /GstPlayBin:playbin0: You do not have a decoder
>>> installed to handle this file.  You might need to install the necessary
>>> plugins.
>>>
>>> So, which plugin do I need to decode this file?  I have browsed the
>>> plugins page, but can't find an mjpg capability.
>>>
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>
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> Tap into the largest installed PC base & get more eyes on your game by
> optimizing for Intel(R) Graphics Technology. Get started today with the
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