My application had a pipeline execution model based on plugin filters, like GStreamer and DirectShow: aquisition => decompression => processing => vizualization => compression => storage => transmission The main codecs that the decompression uses are: jpeg, mpeg4 and h264 (the codecs used by camera manufacturers). If I run my application in a Intel based machine, I'm using Intel IPP to do the decoding, but if I'm using a AMD or some kind of embeded systems that uses ffmpeg, I use ffmpeg to decode frames. Suppose that I want to use OMAP from Texas Instruments.... that board uses GStreamer with a plugin from texas that use the texas DSP. Is it possible I call a Gstreamer API to do only the decoding step? like I do with ffmpeg.... bool load_decoder(...) { /* alloc and initialize AVCodecContext */ m_pCodecCtx = avcodec_alloc_context(); /* set AVCodecContext properties */ m_pCodecCtx->codec_type = CODEC_TYPE_VIDEO; /* video codec type */ if (_cameraInfo.decoder == "mpeg4") { m_pCodecCtx->codec_id = CODEC_ID_MPEG4; /* MJPEG decoder id */ } else if (_cameraInfo.decoder == "jpeg") { m_pCodecCtx->codec_id = CODEC_ID_MJPEG; /* MJPEG decoder id */ } else if (_cameraInfo.decoder == "h264") { m_pCodecCtx->codec_id = CODEC_ID_H264; /* MJPEG decoder id */ } m_pCodecCtx->width = _cameraInfo.width; /* image width */ m_pCodecCtx->height = _cameraInfo.height; /* image height */ m_pCodecCtx->flags |= CODEC_FLAG_EMU_EDGE | CODEC_FLAG_PART; /* find the decoder for the video stream */ m_pCodec = avcodec_find_decoder(m_pCodecCtx->codec_id); if (!m_pCodec) { m_strError = string("Unable to locate codec decoder"); return false; } /* open codec */ if (avcodec_open(m_pCodecCtx, m_pCodec) < 0) { m_strError = "Cannot open codec"; return false; } /* alloc audio/video frame */ m_pFrame = avcodec_alloc_frame(); if (!m_pFrame) { m_strError = "Cannot alloc audio/video frame"; return false; } } <div class="gmail_quote">2010/3/19 wl2776 <<a href="mailto:wl2776@gmail.com">wl2776@gmail.com</a>> <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> <div class="im"> Nuno Cardoso-2 wrote: > > The gstreamer framework uses ffmpeg codecs to encode/decode data? > </div>Most of codecs don't use ffmpeg's codecs. There is a separate plugin, gst-ffmpeg, which uses ffmpeg's muxers, demuxers and codecs. <div class="im"> Nuno Cardoso-2 wrote: > > Or can I develop a gstreamer plugin for my application that uses decoders > from > gstreamer? > </div>Surely, nothing can stop you from developing a plugin. There is a Plugin Writers' Guide and a template, which you can get from git repository. However, FFmpeg is very different from the GStreamer in the concepts. FFmpeg allows you to get an encoded frame or a decoded picture in memory (and encoding also). If you need to draw it, or sync with audio data, then you're on your own. GStreamer provides a pipeline, allowing media data to stream from a source (file, device, network server, ...) to a sink (screen, sound card, file, etc) and takes care about synchronization. -- View this message in context: <a href="http://n4.nabble.com/gstreamer-decoder-tp1599272p1599309.html" target="_blank">http://n4.nabble.com/gstreamer-decoder-tp1599272p1599309.html</a> <div class="im">Sent from the GStreamer-devel mailing list archive at Nabble.com. ------------------------------------------------------------------------------ </div><div><div></div><div class="h5">Download Intel&#174; 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. <a href="http://p.sf.net/sfu/intel-sw-dev" target="_blank">http://p.sf.net/sfu/intel-sw-dev</a> _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.sourceforge.net">gstreamer-devel@lists.sourceforge.net</a> <a href="https://lists.sourceforge.net/lists/listinfo/gstreamer-devel" target="_blank">https://lists.sourceforge.net/lists/listinfo/gstreamer-devel</a> </div></div></blockquote></div>