Hi,<div> </div><div>You should decode the video/audio and then re-encode them to separate files.</div><div>the pipe may look like</div><div> </div><div>gstlaunch filesrc ! demux ! video_decoder ! queue ! encode ! mux ! filesink</div> <div> </div><div>-Ashwini <div class="gmail_quote">On Thu, Nov 24, 2011 at 6:23 PM, Raymond18 <<a href="mailto:yhung124@gmail.com">yhung124@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"> Hi all, Can anyone help me to know how to split a mkv(AVC+AAC) file to pure video and audio files by using gst-launch-0.10? The information of the mkv file is as following, ---------------------------------------------- General Unique ID : 194281003365095078203371305786156002599 (0x92292902E8CC2D8396BA1C4306EC2D27) Complete name : test.mkv Format : Matroska Format version : Version 2 File size : 432 MiB Duration : 26mn 59s Overall bit rate : 2 237 Kbps Encoded date : UTC 2011-11-04 19:32:20 Writing application : mkvmerge v5.0.1 ('Es ist Sommer') built on Oct 9 2011 11:55:43 Writing library : libebml v1.2.2 + libmatroska v1.3.0 Video ID : 1 Format : AVC Format/Info : Advanced Video Codec Format profile : High@L3.1 Format settings, CABAC : Yes Format settings, ReFrames : 1 frame Format settings, GOP : M=1, N=30 Codec ID : V_MPEG4/ISO/AVC Duration : 26mn 59s Width : 1 280 pixels Height : 720 pixels Display aspect ratio : 16:9 Frame rate mode : Variable Frame rate : 30.303 fps Color space : YUV Chroma subsampling : 4:2:0 Bit depth : 8 bits Scan type : Progressive Language : Japanese Default : Yes Forced : No Audio ID : 2 Format : AAC Format/Info : Advanced Audio Codec Format profile : LC Codec ID : A_AAC Duration : 26mn 59s Channel(s) : 2 channels Channel positions : Front: L R Sampling rate : 44.1 KHz Compression mode : Lossy Language : Japanese Default : Yes Forced : No ---------------------------------------------- And I want to split it to pure video and audio file by using gst-launch as following, (I made it by a GUI tool in Windows ) ---------------------------------------------- Complete name : /home/test_track1_jpn.h264 Format : AVC Format/Info : Advanced Video Codec File size : 402 MiB Video Format : AVC Format/Info : Advanced Video Codec Format profile : High@L3.1 Format settings, CABAC : Yes Format settings, ReFrames : 1 frame Format settings, GOP : M=1, N=30 Width : 1 280 pixels Height : 720 pixels Display aspect ratio : 16:9 Frame rate mode : Variable Color space : YUV Chroma subsampling : 4:2:0 Bit depth : 8 bits Scan type : Progressive ---------------------------------------------- and ---------------------------------------------- General Complete name : from_matro.aac Format : ADTS Format/Info : Audio Data Transport Stream File size : 29.8 MiB Overall bit rate mode : Variable Audio Format : AAC Format/Info : Advanced Audio Codec Format version : Version 4 Format profile : LC Bit rate mode : Variable Channel(s) : 2 channels Channel positions : Front: L R Sampling rate : 44.1 KHz Compression mode : Lossy Stream size : 29.8 MiB (100%) ---------------------------------------------- I try to use following comands, but they are useless, can somebody tell me the right pipeline I should use? # gst-launch-0.10 filesrc location=/home/test.mkv ! matroskademux name=d d.video_00 ! filesink location=from_matro.h264 # gst-launch-0.10 filesrc location=/home/test.mkv ! matroskademux name=d d.audio_00 ! filesink location=from_matro.aac -- View this message in context: <a href="http://gstreamer-devel.966125.n4.nabble.com/How-to-split-a-mkv-AVC-AAC-file-to-pure-video-and-audio-files-by-using-gst-launch-tp4103663p4103663.html" target="_blank">http://gstreamer-devel.966125.n4.nabble.com/How-to-split-a-mkv-AVC-AAC-file-to-pure-video-and-audio-files-by-using-gst-launch-tp4103663p4103663.html</a> Sent from the GStreamer-devel mailing list archive at Nabble.com. _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a> <a href="http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" target="_blank">http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> </blockquote></div> </div>