Simulating a video camera with a file
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Simulating a video camera with a file
 
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Hello, I am trying to read raw video data from a file and then encode it using theora encoder. I would like to use standard test videos such as these: http://media.xiph.org/video/derf/ (uncompressed YUV4MPEG, says it is the format accepted by the Theora encoder tools) http://trace.eas.asu.edu/yuv/ I have tried with a pipeline like this: filesrc | ffmpegcolorspace | theoraenc | oggmux | filesink and the videos from the links above but I am getting the Error: not negotiated. Everything works if I substitute the file source with the test source videotestsrc or a webcam v4l2src but this does not allow me to use standard test videos. Is something missing in my pipeline or am I using the wrong format? Any suggestions will be appreciated. Thank you in advance, Katarina ------------------------------------------------------------------------------ The Planet: dedicated and managed hosting, cloud storage, colocation Stay online with enterprise data centers and the best network in the business Choose flexible plans and management services without long-term contracts Personal 24x7 support from experience hosting pros just a phone call away. http://p.sf.net/sfu/theplanet-com _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
Re: Simulating a video camera with a file
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2010/2/9 [hidden email] <[hidden email]>
Try: filesrc ! decodebin | ffmpegcolorspace | theoraenc | oggmux | filesink decodebin is an element to "Autoplug and decode to raw media" -Tristan Everything works if I substitute the file source with the test source videotestsrc or a webcam v4l2src but this does not allow me to use standard test videos. -- Tristan Matthews email: [hidden email] web: http://tristanswork.blogspot.com ------------------------------------------------------------------------------ The Planet: dedicated and managed hosting, cloud storage, colocation Stay online with enterprise data centers and the best network in the business Choose flexible plans and management services without long-term contracts Personal 24x7 support from experience hosting pros just a phone call away. http://p.sf.net/sfu/theplanet-com _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
Re: Simulating a video camera with a file
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In reply to this post by katarina.balac@usi.ch
Thank you very much for your answer. Unfortunately, this returns the error ERROR: from element /GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstTypeFindElement:typefind: Could not determine type of stream Is there anything else I can try? Thanks, Katarina > Hello, > > I am trying to read raw video data from a file and then encode it using > theora encoder. I would like to use standard test videos such as these: > http://media.xiph.org/video/derf/ (uncompressed YUV4MPEG, says it is the > format accepted by the Theora encoder tools) > http://trace.eas.asu.edu/yuv/ > > I have tried with a pipeline like this: filesrc | ffmpegcolorspace | > theoraenc | oggmux | filesink and the videos from the links above but I am > getting the Error: not negotiated. > > filesrc ! decodebin | ffmpegcolorspace | theoraenc | oggmux | filesink decodebin is an element to "Autoplug and decode to raw media" -Tristan ------------------------------------------------------------------------------ SOLARIS 10 is the OS for Data Centers - provides features such as DTrace, Predictive Self Healing and Award Winning ZFS. Get Solaris 10 NOW http://p.sf.net/sfu/solaris-dev2dev _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
Re: Simulating a video camera with a file
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2010/2/10 [hidden email] <[hidden email]>
I would focus on just trying to play it first. I tried the first file, akiyo.yuv with a few different programs to no avail. It doesn't have any header info as it appears to just be raw video data. You could try setting a capsfilter with different caps, i.e. gst-launch -v filesrc ! video/x-raw-yuv, .... ! decodebin ! xvimagesink but i'm not sure how this will work since I don't think the files have a fourcc. Good luck, Tristan Thanks, -- Tristan Matthews email: [hidden email] web: http://tristanswork.blogspot.com ------------------------------------------------------------------------------ SOLARIS 10 is the OS for Data Centers - provides features such as DTrace, Predictive Self Healing and Award Winning ZFS. Get Solaris 10 NOW http://p.sf.net/sfu/solaris-dev2dev _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
Re: Simulating a video camera with a file
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In reply to this post by katarina.balac@usi.ch
Sure, this type of file can not be played. I was actually hoping that, because it is raw video data, there would be a way to connect the file directly to theora encoder without decoding it first. So this can not be done? In that case I guess I will have to use files of a different format and decode them first with decodebin, as you suggested. Thanks a lot for your help, Katarina > > Thank you very much for your answer. Unfortunately, this returns the error > ERROR: from element > /GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstTypeFindElement:typefind: > Could not determine type of stream > Is there anything else I can try? > > I would focus on just trying to play it first. I tried the first file, akiyo.yuv with a few different programs to no avail. It doesn't have any header info as it appears to just be raw video data. You could try setting a capsfilter with different caps, i.e. gst-launch -v filesrc ! video/x-raw-yuv, .... ! decodebin ! xvimagesink but i'm not sure how this will work since I don't think the files have a fourcc. Good luck, Tristan > Thanks, > Katarina > > > > Hello, > > > > I am trying to read raw video data from a file and then encode it using > > theora encoder. I would like to use standard test videos such as these: > > http://media.xiph.org/video/derf/ (uncompressed YUV4MPEG, says it is > the > > format accepted by the Theora encoder tools) > > http://trace.eas.asu.edu/yuv/ > > > > I have tried with a pipeline like this: filesrc | ffmpegcolorspace | > > theoraenc | oggmux | filesink and the videos from the links above but I > am > > getting the Error: not negotiated. > > > > > Try: > filesrc ! decodebin | ffmpegcolorspace | theoraenc | oggmux | filesink > > decodebin is an element to "Autoplug and decode to raw media" > > -Tristan > > > ------------------------------------------------------------------------------ > SOLARIS 10 is the OS for Data Centers - provides features such as DTrace, > Predictive Self Healing and Award Winning ZFS. Get Solaris 10 NOW > http://p.sf.net/sfu/solaris-dev2dev > _______________________________________________ > gstreamer-devel mailing list > [hidden email] > https://lists.sourceforge.net/lists/listinfo/gstreamer-devel > -- Tristan Matthews email: [hidden email] web: http://tristanswork.blogspot.com -------------- next part -------------- An HTML attachment was scrubbed... ------------------------------ ------------------------------------------------------------------------------ SOLARIS 10 is the OS for Data Centers - provides features such as DTrace, Predictive Self Healing and Award Winning ZFS. Get Solaris 10 NOW http://p.sf.net/sfu/solaris-dev2dev ------------------------------ _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel End of gstreamer-devel Digest, Vol 45, Issue 16 *********************************************** ------------------------------------------------------------------------------ SOLARIS 10 is the OS for Data Centers - provides features such as DTrace, Predictive Self Healing and Award Winning ZFS. Get Solaris 10 NOW http://p.sf.net/sfu/solaris-dev2dev _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
Re: Simulating a video camera with a file
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In reply to this post by katarina.balac@usi.ch
[hidden email] wrote:
> Hello, > > I am trying to read raw video data from a file and then encode it using theora encoder. I would like to use standard test videos such as these: > http://media.xiph.org/video/derf/ (uncompressed YUV4MPEG, says it is the format accepted by the Theora encoder tools) > http://trace.eas.asu.edu/yuv/ > > I have tried with a pipeline like this: filesrc | ffmpegcolorspace | theoraenc | oggmux | filesink and the videos from the links above but I am getting the Error: not negotiated. > Use videoparse for raw files. Stefan > Everything works if I substitute the file source with the test source videotestsrc or a webcam v4l2src but this does not allow me to use standard test videos. > Is something missing in my pipeline or am I using the wrong format? > Any suggestions will be appreciated. > > Thank you in advance, > Katarina > > ------------------------------------------------------------------------------ > The Planet: dedicated and managed hosting, cloud storage, colocation > Stay online with enterprise data centers and the best network in the business > Choose flexible plans and management services without long-term contracts > Personal 24x7 support from experience hosting pros just a phone call away. > http://p.sf.net/sfu/theplanet-com > _______________________________________________ > gstreamer-devel mailing list > [hidden email] > https://lists.sourceforge.net/lists/listinfo/gstreamer-devel > ------------------------------------------------------------------------------ SOLARIS 10 is the OS for Data Centers - provides features such as DTrace, Predictive Self Healing and Award Winning ZFS. Get Solaris 10 NOW http://p.sf.net/sfu/solaris-dev2dev _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
Re: Simulating a video camera with a file
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2010/2/11 Stefan Kost <[hidden email]>
Great tip, I wish I'd known about that element before. Here's the working launch line: gst-launch -v filesrc location=akiyo_qcif.yuv ! videoparse width=176 height=144 ! xvimagesink You can also set the format property as needed (for other colorspaces). -Tristan Stefan -- Tristan Matthews email: [hidden email] web: http://tristanswork.blogspot.com ------------------------------------------------------------------------------ SOLARIS 10 is the OS for Data Centers - provides features such as DTrace, Predictive Self Healing and Award Winning ZFS. Get Solaris 10 NOW http://p.sf.net/sfu/solaris-dev2dev _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
Re: Simulating a video camera with a file
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In reply to this post by katarina.balac@usi.ch
Great! Thank you so much Stefan and Tristan! Katarina > [hidden email] wrote: > > Hello, > > > > I am trying to read raw video data from a file and then encode it using > theora encoder. I would like to use standard test videos such as these: > > http://media.xiph.org/video/derf/ (uncompressed YUV4MPEG, says it is > the format accepted by the Theora encoder tools) > > http://trace.eas.asu.edu/yuv/ > > > > I have tried with a pipeline like this: filesrc | ffmpegcolorspace | > theoraenc | oggmux | filesink and the videos from the links above but I am > getting the Error: not negotiated. > > > > Use videoparse for raw files. > > launch line: gst-launch -v filesrc location=akiyo_qcif.yuv ! videoparse width=176 height=144 ! xvimagesink You can also set the format property as needed (for other colorspaces). -Tristan Stefan > > > Everything works if I substitute the file source with the test source > videotestsrc or a webcam v4l2src but this does not allow me to use standard > test videos. > > Is something missing in my pipeline or am I using the wrong format? > > Any suggestions will be appreciated. > > > > Thank you in advance, > > Katarina > > ------------------------------------------------------------------------------ SOLARIS 10 is the OS for Data Centers - provides features such as DTrace, Predictive Self Healing and Award Winning ZFS. Get Solaris 10 NOW http://p.sf.net/sfu/solaris-dev2dev _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
Re: Simulating a video camera with a file
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In reply to this post by Tristan Matthews-2
Tristan Matthews wrote:
> 2010/2/11 Stefan Kost <[hidden email]> >> Use videoparse for raw files. >> >> > Great tip, I wish I'd known about that element before. Here's the working > launch line: > > gst-launch -v filesrc location=akiyo_qcif.yuv ! videoparse width=176 > height=144 ! xvimagesink To be clear, this works for the ".yuv" raw files, but not for the ".y4m" YUV4MPEG2 files. AFAIK, there is no "y4mdec" element for gstreamer (yet). --Ben ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
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Re: Simulating a video camera with a file
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> > gst-launch -v filesrc location=akiyo_qcif.yuv ! videoparse width=176
> > height=144 ! xvimagesink > > To be clear, this works for the ".yuv" raw files, but not for the ".y4m" > YUV4MPEG2 files. AFAIK, there is no "y4mdec" element for gstreamer (yet). The ffdemux_yuv4mpegpipe element from gst-ffmpeg should do the trick for those. Cheers -Tim ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ gstreamer-devel mailing list [hidden email] https://lists.sourceforge.net/lists/listinfo/gstreamer-devel |
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