Which CODEC for mjpg?

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Which CODEC for mjpg?

Brian Michalk
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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Re: Which CODEC for mjpg?

Sudarshan Bisht
Install latest gst-ffmpeg package, there you will find ffdec_mjpeg. 


On Mon, Nov 29, 2010 at 11:58 PM, Brian Michalk <[hidden email]> 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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--
Regards,

Sudarshan Bisht

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Re: Which CODEC for mjpg?

michael smith-6-3
In reply to this post by Brian Michalk
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 <[hidden email]> 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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Re: Which CODEC for mjpg?

Brian Michalk
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<[hidden email]>  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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Re: Which CODEC for mjpg?

michael smith-6-3
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 <[hidden email]> 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<[hidden email]>  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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Re: Which CODEC for mjpg?

Brian Michalk
Actually, I have tried a great many variations to try to get this to work.

So, if it is a problem in the AVI demuxer, I assume that this is not an
issue I can resolve.

Bummer.  Perhaps I can get the source videos in some other format.

On 11/29/2010 1:39 PM, Michael Smith wrote:

> 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<[hidden email]>  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<[hidden email]>    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.
>>>>
>>>> ------------------------------------------------------------------------------
>>>> Increase Visibility of Your 3D Game App&    Earn a Chance To Win $500!
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>>>>
>>> ------------------------------------------------------------------------------
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>>
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Re: Which CODEC for mjpg?

Thiago Sousa Santos-2


On Mon, Nov 29, 2010 at 4:45 PM, Brian Michalk <[hidden email]> wrote:
Actually, I have tried a great many variations to try to get this to work.

So, if it is a problem in the AVI demuxer, I assume that this is not an
issue I can resolve.

You can file a bug and provide this file.

http://bugzilla.gnome.org

 

Bummer.  Perhaps I can get the source videos in some other format.

On 11/29/2010 1:39 PM, Michael Smith wrote:
> 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<[hidden email]>  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<[hidden email]>    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.
>>>>
>>>> ------------------------------------------------------------------------------
>>>> Increase Visibility of Your 3D Game App&    Earn a Chance To Win $500!
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>>
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--
Thiago Santos

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Re: Which CODEC for mjpg?

wally_bkg
In reply to this post by Brian Michalk
I have the opposite problem.  I can make jpeg video files with:

gst-launch v4l2src ! video/x-raw-yuv ! queue ! ffmpegcolorspace ! jpegenc ! avimux ! filesink location=mjpeg.avi

and the file plays back fine in gstreamer (using Totum on Ubuntu 10.04) but when I copy it over to a windows system it doesn't play.  There are several MJPEG playback codecs on the Windows system. Gspot Codec Information on Windows shows a valid playback pipeline, but errors in rendering.


I tried Theoraenc instead with:

gst-launch v4l2src !  queue ! ffmpegcolorspace ! theoraenc ! oggmux ! filesink location=theora.ogv

and again it plays fine in Totum but not on Windows (the Windows system can play back the ogg video sample files distributed with Ubuntu).



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Re: Which CODEC for mjpg?

Mike Martin
On 3 December 2010 16:33, wally_bkg <[hidden email]> wrote:

>
> I have the opposite problem.  I can make jpeg video files with:
>
> gst-launch v4l2src ! video/x-raw-yuv ! queue ! ffmpegcolorspace ! jpegenc !
> avimux ! filesink location=mjpeg.avi
>
> and the file plays back fine in gstreamer (using Totum on Ubuntu 10.04) but
> when I copy it over to a windows system it doesn't play.  There are several
> MJPEG playback codecs on the Windows system. Gspot Codec Information on
> Windows shows a valid playback pipeline, but errors in rendering.
>
>
> I tried Theoraenc instead with:
>
> gst-launch v4l2src !  queue ! ffmpegcolorspace ! theoraenc ! oggmux !
> filesink location=theora.ogv
>
> and again it plays fine in Totum but not on Windows (the Windows system can
> play back the ogg video sample files distributed with Ubuntu).
>
>
>

what codec does it show as?

>
> --
> View this message in context: http://gstreamer-devel.966125.n4.nabble.com/Which-CODEC-for-mjpg-tp3064099p3071342.html
> Sent from the GStreamer-devel mailing list archive at Nabble.com.
>
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Re: Which CODEC for mjpg?

Stefan Sauer
In reply to this post by wally_bkg
Am 03.12.2010 18:33, schrieb wally_bkg:

>
> I have the opposite problem.  I can make jpeg video files with:
>
> gst-launch v4l2src ! video/x-raw-yuv ! queue ! ffmpegcolorspace ! jpegenc !
> avimux ! filesink location=mjpeg.avi
>
> and the file plays back fine in gstreamer (using Totum on Ubuntu 10.04) but
> when I copy it over to a windows system it doesn't play.  There are several
> MJPEG playback codecs on the Windows system. Gspot Codec Information on
> Windows shows a valid playback pipeline, but errors in rendering.
>
>
> I tried Theoraenc instead with:
>
> gst-launch v4l2src !  queue ! ffmpegcolorspace ! theoraenc ! oggmux !
> filesink location=theora.ogv
>
> and again it plays fine in Totum but not on Windows (the Windows system can
> play back the ogg video sample files distributed with Ubuntu).
>
>
>
>

Try gst-launch -e to make gst-launch sending and EOS on Ctrl-c (or use
num-buffers on v4l2src).

Stefan

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Re: Which CODEC for mjpg?

wally_bkg
Stefan Kost wrote
Am 03.12.2010 18:33, schrieb wally_bkg:
>
> I have the opposite problem.  I can make jpeg video files with:
>
> gst-launch v4l2src ! video/x-raw-yuv ! queue ! ffmpegcolorspace ! jpegenc !
> avimux ! filesink location=mjpeg.avi
>
> and the file plays back fine in gstreamer (using Totum on Ubuntu 10.04) but
> when I copy it over to a windows system it doesn't play.  There are several
> MJPEG playback codecs on the Windows system. Gspot Codec Information on
> Windows shows a valid playback pipeline, but errors in rendering.
>
>
> I tried Theoraenc instead with:
>
> gst-launch v4l2src !  queue ! ffmpegcolorspace ! theoraenc ! oggmux !
> filesink location=theora.ogv
>
> and again it plays fine in Totum but not on Windows (the Windows system can
> play back the ogg video sample files distributed with Ubuntu).
>

Try gst-launch -e to make gst-launch sending and EOS on Ctrl-c (or use
num-buffers on v4l2src).

Stefan
Bingo!  That was what was missing.

Seems the OGV on Windows issue is my K-lite Codec pack is not up to date.  VLC-win32 v1.1.5 plays it back fine.