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300 lines
16 KiB
C
300 lines
16 KiB
C
/* Quicktime muxer documentation
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* Copyright (C) 2008-2010 Thiago Santos <thiagoss@embedded.ufcg.edu.br>
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* Copyright (C) 2008 Mark Nauwelaerts <mnauw@users.sf.net>
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* Copyright (C) 2010 Nokia Corporation. All rights reserved.
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* Contact: Stefan Kost <stefan.kost@nokia.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/*
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* Unless otherwise indicated, Source Code is licensed under MIT license.
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* See further explanation attached in License Statement (distributed in the file
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* LICENSE).
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is furnished to do
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* so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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/* ============================= mp4mux ==================================== */
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/**
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* SECTION:element-mp4mux
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* @short_description: Muxer for ISO MPEG-4 (.mp4) files
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*
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* This element merges streams (audio and video) into ISO MPEG-4 (.mp4) files.
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*
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* The following background intends to explain why various similar muxers
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* are present in this plugin.
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*
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* The <ulink url="http://www.apple.com/quicktime/resources/qtfileformat.pdf">
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* QuickTime file format specification</ulink> served as basis for the MP4 file
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* format specification (mp4mux), and as such the QuickTime file structure is
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* nearly identical to the so-called ISO Base Media file format defined in
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* ISO 14496-12 (except for some media specific parts).
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* In turn, the latter ISO Base Media format was further specialized as a
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* Motion JPEG-2000 file format in ISO 15444-3 (mj2mux)
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* and in various 3GPP(2) specs (gppmux).
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* The fragmented file features defined (only) in ISO Base Media are used by
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* ISMV files making up (a.o.) Smooth Streaming (ismlmux).
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*
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* A few properties (<link linkend="GstMP4Mux--movie-timescale">movie-timescale</link>,
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* <link linkend="GstMP4Mux--trak-timescale">trak-timescale</link>) allow adjusting
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* some technical parameters, which might be useful in (rare) cases to resolve
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* compatibility issues in some situations.
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*
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* Some other properties influence the result more fundamentally.
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* A typical mov/mp4 file's metadata (aka moov) is located at the end of the file,
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* somewhat contrary to this usually being called "the header".
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* However, a <link linkend="GstMP4Mux--faststart">faststart</link> file will
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* (with some effort) arrange this to be located near start of the file,
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* which then allows it e.g. to be played while downloading.
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* Alternatively, rather than having one chunk of metadata at start (or end),
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* there can be some metadata at start and most of the other data can be spread
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* out into fragments of <link linkend="GstMP4Mux--fragment-duration">fragment-duration</link>.
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* If such fragmented layout is intended for streaming purposes, then
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* <link linkend="GstMP4Mux--streamable">streamable</link> allows foregoing to add
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* index metadata (at the end of file).
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*
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* <link linkend="GstMP4Mux--dts-method">dts-method</link> allows selecting a
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* method for managing input timestamps (stay tuned for 0.11 to have this
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* automagically settled). The default delta/duration method should handle nice
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* (aka perfect streams) just fine, but may experience problems otherwise
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* (e.g. input stream with re-ordered B-frames and/or with frame dropping).
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* The re-ordering approach re-assigns incoming timestamps in ascending order
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* to incoming buffers and offers an alternative in such cases. In cases where
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* that might fail, the remaining method can be tried, which is exact and
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* according to specs, but might experience playback on not so spec-wise players.
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* Note that this latter approach also requires one to enable
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* <link linkend="GstMP4Mux--presentation-timestamp">presentation-timestamp</link>.
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*
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* <refsect2>
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* <title>Example pipelines</title>
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* |[
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* gst-launch gst-launch v4l2src num-buffers=50 ! queue ! x264enc ! mp4mux ! filesink location=video.mp4
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* ]|
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* Records a video stream captured from a v4l2 device, encodes it into H.264
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* and muxes it into an mp4 file.
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* </refsect2>
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*
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* Documentation last reviewed on 2011-04-21
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*/
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/* ============================= 3gppmux ==================================== */
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/**
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* SECTION:element-3gppmux
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* @short_description: Muxer for 3GPP (.3gp) files
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*
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* This element merges streams (audio and video) into 3GPP (.3gp) files.
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*
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* The following background intends to explain why various similar muxers
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* are present in this plugin.
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*
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* The <ulink url="http://www.apple.com/quicktime/resources/qtfileformat.pdf">
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* QuickTime file format specification</ulink> served as basis for the MP4 file
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* format specification (mp4mux), and as such the QuickTime file structure is
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* nearly identical to the so-called ISO Base Media file format defined in
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* ISO 14496-12 (except for some media specific parts).
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* In turn, the latter ISO Base Media format was further specialized as a
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* Motion JPEG-2000 file format in ISO 15444-3 (mj2mux)
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* and in various 3GPP(2) specs (gppmux).
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* The fragmented file features defined (only) in ISO Base Media are used by
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* ISMV files making up (a.o.) Smooth Streaming (ismlmux).
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*
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* A few properties (<link linkend="Gst3GPPMux--movie-timescale">movie-timescale</link>,
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* <link linkend="Gst3GPPMux--trak-timescale">trak-timescale</link>) allow adjusting
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* some technical parameters, which might be useful in (rare) cases to resolve
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* compatibility issues in some situations.
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*
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* Some other properties influence the result more fundamentally.
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* A typical mov/mp4 file's metadata (aka moov) is located at the end of the file,
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* somewhat contrary to this usually being called "the header".
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* However, a <link linkend="Gst3GPPMux--faststart">faststart</link> file will
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* (with some effort) arrange this to be located near start of the file,
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* which then allows it e.g. to be played while downloading.
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* Alternatively, rather than having one chunk of metadata at start (or end),
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* there can be some metadata at start and most of the other data can be spread
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* out into fragments of <link linkend="Gst3GPPMux--fragment-duration">fragment-duration</link>.
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* If such fragmented layout is intended for streaming purposes, then
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* <link linkend="Gst3GPPMux--streamable">streamable</link> allows foregoing to add
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* index metadata (at the end of file).
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*
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* <link linkend="Gst3GPPMux--dts-method">dts-method</link> allows selecting a
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* method for managing input timestamps (stay tuned for 0.11 to have this
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* automagically settled). The default delta/duration method should handle nice
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* (aka perfect streams) just fine, but may experience problems otherwise
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* (e.g. input stream with re-ordered B-frames and/or with frame dropping).
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* The re-ordering approach re-assigns incoming timestamps in ascending order
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* to incoming buffers and offers an alternative in such cases. In cases where
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* that might fail, the remaining method can be tried, which is exact and
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* according to specs, but might experience playback on not so spec-wise players.
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* Note that this latter approach also requires one to enable
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* <link linkend="Gst3GPPMux--presentation-timestamp">presentation-timestamp</link>.
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*
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* <refsect2>
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* <title>Example pipelines</title>
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* |[
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* gst-launch v4l2src num-buffers=50 ! queue ! ffenc_h263 ! gppmux ! filesink location=video.3gp
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* ]|
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* Records a video stream captured from a v4l2 device, encodes it into H.263
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* and muxes it into an 3gp file.
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* </refsect2>
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*
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* Documentation last reviewed on 2011-04-21
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*/
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/* ============================= mj2pmux ==================================== */
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/**
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* SECTION:element-mj2mux
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* @short_description: Muxer for Motion JPEG-2000 (.mj2) files
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*
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* This element merges streams (audio and video) into MJ2 (.mj2) files.
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*
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* The following background intends to explain why various similar muxers
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* are present in this plugin.
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*
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* The <ulink url="http://www.apple.com/quicktime/resources/qtfileformat.pdf">
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* QuickTime file format specification</ulink> served as basis for the MP4 file
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* format specification (mp4mux), and as such the QuickTime file structure is
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* nearly identical to the so-called ISO Base Media file format defined in
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* ISO 14496-12 (except for some media specific parts).
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* In turn, the latter ISO Base Media format was further specialized as a
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* Motion JPEG-2000 file format in ISO 15444-3 (mj2mux)
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* and in various 3GPP(2) specs (gppmux).
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* The fragmented file features defined (only) in ISO Base Media are used by
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* ISMV files making up (a.o.) Smooth Streaming (ismlmux).
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*
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* A few properties (<link linkend="GstMJ2Mux--movie-timescale">movie-timescale</link>,
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* <link linkend="GstMJ2Mux--trak-timescale">trak-timescale</link>) allow adjusting
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* some technical parameters, which might be useful in (rare) cases to resolve
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* compatibility issues in some situations.
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*
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* Some other properties influence the result more fundamentally.
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* A typical mov/mp4 file's metadata (aka moov) is located at the end of the file,
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* somewhat contrary to this usually being called "the header".
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* However, a <link linkend="GstMJ2Mux--faststart">faststart</link> file will
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* (with some effort) arrange this to be located near start of the file,
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* which then allows it e.g. to be played while downloading.
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* Alternatively, rather than having one chunk of metadata at start (or end),
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* there can be some metadata at start and most of the other data can be spread
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* out into fragments of <link linkend="GstMJ2Mux--fragment-duration">fragment-duration</link>.
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* If such fragmented layout is intended for streaming purposes, then
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* <link linkend="GstMJ2Mux--streamable">streamable</link> allows foregoing to add
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* index metadata (at the end of file).
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*
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* <link linkend="GstMJ2Mux--dts-method">dts-method</link> allows selecting a
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* method for managing input timestamps (stay tuned for 0.11 to have this
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* automagically settled). The default delta/duration method should handle nice
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* (aka perfect streams) just fine, but may experience problems otherwise
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* (e.g. input stream with re-ordered B-frames and/or with frame dropping).
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* The re-ordering approach re-assigns incoming timestamps in ascending order
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* to incoming buffers and offers an alternative in such cases. In cases where
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* that might fail, the remaining method can be tried, which is exact and
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* according to specs, but might experience playback on not so spec-wise players.
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* Note that this latter approach also requires one to enable
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* <link linkend="GstMJ2Mux--presentation-timestamp">presentation-timestamp</link>.
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*
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* <refsect2>
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* <title>Example pipelines</title>
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* |[
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* gst-launch v4l2src num-buffers=50 ! queue ! jp2kenc ! mj2mux ! filesink location=video.mj2
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* ]|
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* Records a video stream captured from a v4l2 device, encodes it into JPEG-2000
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* and muxes it into an mj2 file.
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* </refsect2>
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*
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* Documentation last reviewed on 2011-04-21
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*/
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/* ============================= ismlmux ==================================== */
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/**
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* SECTION:element-ismlmux
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* @short_description: Muxer for ISML smooth streaming (.isml) files
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*
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* This element merges streams (audio and video) into MJ2 (.mj2) files.
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*
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* The following background intends to explain why various similar muxers
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* are present in this plugin.
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*
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* The <ulink url="http://www.apple.com/quicktime/resources/qtfileformat.pdf">
|
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* QuickTime file format specification</ulink> served as basis for the MP4 file
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* format specification (mp4mux), and as such the QuickTime file structure is
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* nearly identical to the so-called ISO Base Media file format defined in
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* ISO 14496-12 (except for some media specific parts).
|
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* In turn, the latter ISO Base Media format was further specialized as a
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* Motion JPEG-2000 file format in ISO 15444-3 (mj2mux)
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* and in various 3GPP(2) specs (gppmux).
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* The fragmented file features defined (only) in ISO Base Media are used by
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* ISMV files making up (a.o.) Smooth Streaming (ismlmux).
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*
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* A few properties (<link linkend="GstISMLMux--movie-timescale">movie-timescale</link>,
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* <link linkend="GstISMLMux--trak-timescale">trak-timescale</link>) allow adjusting
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* some technical parameters, which might be useful in (rare) cases to resolve
|
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* compatibility issues in some situations.
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*
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* Some other properties influence the result more fundamentally.
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* A typical mov/mp4 file's metadata (aka moov) is located at the end of the file,
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* somewhat contrary to this usually being called "the header".
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* However, a <link linkend="GstISMLMux--faststart">faststart</link> file will
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* (with some effort) arrange this to be located near start of the file,
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* which then allows it e.g. to be played while downloading.
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* Alternatively, rather than having one chunk of metadata at start (or end),
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* there can be some metadata at start and most of the other data can be spread
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* out into fragments of <link linkend="GstISMLMux--fragment-duration">fragment-duration</link>.
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* If such fragmented layout is intended for streaming purposes, then
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* <link linkend="GstISMLMux--streamable">streamable</link> allows foregoing to add
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* index metadata (at the end of file).
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*
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* <link linkend="GstISMLMux--dts-method">dts-method</link> allows selecting a
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* method for managing input timestamps (stay tuned for 0.11 to have this
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* automagically settled). The default delta/duration method should handle nice
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* (aka perfect streams) just fine, but may experience problems otherwise
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* (e.g. input stream with re-ordered B-frames and/or with frame dropping).
|
|
* The re-ordering approach re-assigns incoming timestamps in ascending order
|
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* to incoming buffers and offers an alternative in such cases. In cases where
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* that might fail, the remaining method can be tried, which is exact and
|
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* according to specs, but might experience playback on not so spec-wise players.
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* Note that this latter approach also requires one to enable
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* <link linkend="GstISMLMux--presentation-timestamp">presentation-timestamp</link>.
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*
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* <refsect2>
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* <title>Example pipelines</title>
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* |[
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* gst-launch v4l2src num-buffers=50 ! queue ! jp2kenc ! mj2mux ! filesink location=video.mj2
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* ]|
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* Records a video stream captured from a v4l2 device, encodes it into JPEG-2000
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* and muxes it into an mj2 file.
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* </refsect2>
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*
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* Documentation last reviewed on 2011-04-21
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*/
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