/* Quicktime muxer documentation * Copyright (C) 2008-2010 Thiago Santos * Copyright (C) 2008 Mark Nauwelaerts * Copyright (C) 2010 Nokia Corporation. All rights reserved. * Contact: Stefan Kost * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, * Boston, MA 02110-1301, USA. */ /* * Unless otherwise indicated, Source Code is licensed under MIT license. * See further explanation attached in License Statement (distributed in the file * LICENSE). * * Permission is hereby granted, free of charge, to any person obtaining a copy of * this software and associated documentation files (the "Software"), to deal in * the Software without restriction, including without limitation the rights to * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies * of the Software, and to permit persons to whom the Software is furnished to do * so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ /* ============================= qtmux ==================================== */ /** * SECTION:element-qtmux * @title: qtmux * @short_description: Muxer for quicktime(.mov) files * * This element merges streams (audio and video) into QuickTime(.mov) files. * * The following background intends to explain why various similar muxers * are present in this plugin. * * The [QuickTime file format specification](http://www.apple.com/quicktime/resources/qtfileformat.pdf) * served as basis for the MP4 file format specification (mp4mux), and as such * the QuickTime file structure is nearly identical to the so-called ISO Base * Media file format defined in ISO 14496-12 (except for some media specific * parts). * * In turn, the latter ISO Base Media format was further specialized as a * Motion JPEG-2000 file format in ISO 15444-3 (mj2mux) * and in various 3GPP(2) specs (gppmux). * The fragmented file features defined (only) in ISO Base Media are used by * ISMV files making up (a.o.) Smooth Streaming (ismlmux). * * A few properties (#GstQTMux:movie-timescale, #GstQTMux:trak-timescale, * #GstQTMuxPad:trak-timescale) allow adjusting some technical parameters, * which might be useful in (rare) cases to resolve compatibility issues in * some situations. * * Some other properties influence the result more fundamentally. * A typical mov/mp4 file's metadata (aka moov) is located at the end of the * file, somewhat contrary to this usually being called "the header". * However, a #GstQTMux:faststart file will (with some effort) arrange this to * be located near start of the file, which then allows it e.g. to be played * while downloading. Alternatively, rather than having one chunk of metadata at * start (or end), there can be some metadata at start and most of the other * data can be spread out into fragments of #GstQTMux:fragment-duration. * If such fragmented layout is intended for streaming purposes, then * #GstQTMuxElement:streamable allows foregoing to add index metadata (at the end of * file). * * When the maximum duration to be recorded can be known in advance, #GstQTMuxElement * also supports a 'Robust Muxing' mode. In robust muxing mode, space for the * headers are reserved at the start of muxing, and rewritten at a configurable * interval, so that the output file is always playable, even if the recording * is interrupted uncleanly by a crash. Robust muxing mode requires a seekable * output, such as filesink, because it needs to rewrite the start of the file. * * To enable robust muxing mode, set the #GstQTMux:reserved-moov-update-period * and #GstQTMux:reserved-max-duration property. Also present is the * #GstQTMux:reserved-bytes-per-sec property, which can be increased if * for some reason the default is not large enough and the initial reserved * space for headers is too small. Applications can monitor the * #GstQTMux:reserved-duration-remaining property to see how close to full * the reserved space is becoming. * * Applications that wish to be able to use/edit a file while it is being * written to by live content, can use the "Robust Prefill Muxing" mode. That * mode is a variant of the "Robust Muxing" mode in that it will pre-allocate a * completely valid header from the start for all tracks (i.e. it appears as * though the file is "reserved-max-duration" long with all samples * present). This mode can be enabled by setting the * #GstQTMux:reserved-moov-update-period and #GstQTMux:reserved-prefill * properties. Note that this mode is only possible with input streams that have * a fixed sample size (such as raw audio and Prores Video) and that don't * have reordered samples. * * ## Example pipelines * |[ * gst-launch-1.0 v4l2src num-buffers=500 ! video/x-raw,width=320,height=240 ! videoconvert ! qtmux ! filesink location=video.mov * ]| * Records a video stream captured from a v4l2 device and muxes it into a qt file. * */ /* ============================= mp4mux ==================================== */ /** * SECTION:element-mp4mux * @title: mp4mux * @short_description: Muxer for ISO MPEG-4 (.mp4) files * * This element merges streams (audio and video) into ISO MPEG-4 (.mp4) files. * * The following background intends to explain why various similar muxers * are present in this plugin. * * The [QuickTime file format specification](http://www.apple.com/quicktime/resources/qtfileformat.pdf) * served as basis for the MP4 file format specification (mp4mux), and as such * the QuickTime file structure is nearly identical to the so-called ISO Base * Media file format defined in ISO 14496-12 (except for some media specific * parts). * * In turn, the latter ISO Base Media format was further specialized as a * Motion JPEG-2000 file format in ISO 15444-3 (mj2mux) * and in various 3GPP(2) specs (3gppmux). * The fragmented file features defined (only) in ISO Base Media are used by * ISMV files making up (a.o.) Smooth Streaming (ismlmux). * * A few properties (#GstQTMux:movie-timescale, #GstQTMux:trak-timescale) * allow adjusting some technical parameters, which might be useful in (rare) * cases to resolve compatibility issues in some situations. * * Some other properties influence the result more fundamentally. * A typical mov/mp4 file's metadata (aka moov) is located at the end of the * file, somewhat contrary to this usually being called "the header". * However, a #GstQTMux:faststart file will (with some effort) arrange this to * be located near start of the file, which then allows it e.g. to be played * while downloading. Alternatively, rather than having one chunk of metadata at * start (or end), there can be some metadata at start and most of the other * data can be spread out into fragments of #GstQTMux:fragment-duration. * If such fragmented layout is intended for streaming purposes, then * #GstMP4Mux:streamable allows foregoing to add index metadata (at the end of * file). * * ## Example pipelines * |[ * gst-launch-1.0 gst-launch-1.0 v4l2src num-buffers=50 ! queue ! x264enc ! mp4mux ! filesink location=video.mp4 * ]| * Records a video stream captured from a v4l2 device, encodes it into H.264 * and muxes it into an mp4 file. * */ /* ============================= 3gppmux ==================================== */ /** * SECTION:element-3gppmux * @title: 3gppmux * @short_description: Muxer for 3GPP (.3gp) files * * This element merges streams (audio and video) into 3GPP (.3gp) files. * * The following background intends to explain why various similar muxers * are present in this plugin. * * The [QuickTime file format specification](http://www.apple.com/quicktime/resources/qtfileformat.pdf) * served as basis for the MP4 file format specification (mp4mux), and as such * the QuickTime file structure is nearly identical to the so-called ISO Base * Media file format defined in ISO 14496-12 (except for some media specific * parts). * * In turn, the latter ISO Base Media format was further specialized as a * Motion JPEG-2000 file format in ISO 15444-3 (mj2mux) * and in various 3GPP(2) specs (3gppmux). * The fragmented file features defined (only) in ISO Base Media are used by * ISMV files making up (a.o.) Smooth Streaming (ismlmux). * * A few properties (#GstQTMux:movie-timescale, #GstQTMux:trak-timescale) * allow adjusting some technical parameters, which might be useful in (rare) * cases to resolve compatibility issues in some situations. * * Some other properties influence the result more fundamentally. * A typical mov/mp4 file's metadata (aka moov) is located at the end of the file, * somewhat contrary to this usually being called "the header". However, a * #GstQTMux:faststart file will (with some effort) arrange this to be located * near start of the file, which then allows it e.g. to be played while * downloading. Alternatively, rather than having one chunk of metadata at start * (or end), there can be some metadata at start and most of the other data can * be spread out into fragments of #GstQTMux:fragment-duration. If such * fragmented layout is intended for streaming purposes, then * #Gst3GPPMux:streamable allows foregoing to add index metadata (at the end of * file). * * ## Example pipelines * |[ * gst-launch-1.0 v4l2src num-buffers=50 ! queue ! ffenc_h263 ! 3gppmux ! filesink location=video.3gp * ]| * Records a video stream captured from a v4l2 device, encodes it into H.263 * and muxes it into an 3gp file. * * Documentation last reviewed on 2011-04-21 */ /* ============================= mj2pmux ==================================== */ /** * SECTION:element-mj2mux * @title: mj2mux * @short_description: Muxer for Motion JPEG-2000 (.mj2) files * * This element merges streams (audio and video) into MJ2 (.mj2) files. * * The following background intends to explain why various similar muxers * are present in this plugin. * * The [QuickTime file format specification](http://www.apple.com/quicktime/resources/qtfileformat.pdf) * served as basis for the MP4 file format specification (mp4mux), and as such * the QuickTime file structure is nearly identical to the so-called ISO Base * Media file format defined in ISO 14496-12 (except for some media specific * parts). * * In turn, the latter ISO Base Media format was further specialized as a * Motion JPEG-2000 file format in ISO 15444-3 (mj2mux) * and in various 3GPP(2) specs (3gppmux). * The fragmented file features defined (only) in ISO Base Media are used by * ISMV files making up (a.o.) Smooth Streaming (ismlmux). * * A few properties (#GstQTMux:movie-timescale, #GstQTMux:trak-timescale) * allow adjusting some technical parameters, which might be useful in (rare) * cases to resolve compatibility issues in some situations. * * Some other properties influence the result more fundamentally. * A typical mov/mp4 file's metadata (aka moov) is located at the end of the file, * somewhat contrary to this usually being called "the header". However, a * #GstQTMux:faststart file will (with some effort) arrange this to be located * near start of the file, which then allows it e.g. to be played while * downloading. Alternatively, rather than having one chunk of metadata at start * (or end), there can be some metadata at start and most of the other data can * be spread out into fragments of #GstQTMux:fragment-duration. If such * fragmented layout is intended for streaming purposes, then * #GstMJ2Mux:streamable allows foregoing to add index metadata (at the end of * file). * * ## Example pipelines * |[ * gst-launch-1.0 v4l2src num-buffers=50 ! queue ! jp2kenc ! mj2mux ! filesink location=video.mj2 * ]| * Records a video stream captured from a v4l2 device, encodes it into JPEG-2000 * and muxes it into an mj2 file. * * Documentation last reviewed on 2011-04-21 */ /* ============================= ismlmux ==================================== */ /** * SECTION:element-ismlmux * @title: ismlmux * @short_description: Muxer for ISML smooth streaming (.isml) files * * This element merges streams (audio and video) into MJ2 (.mj2) files. * * The following background intends to explain why various similar muxers * are present in this plugin. * * The [QuickTime file format specification](http://www.apple.com/quicktime/resources/qtfileformat.pdf) * served as basis for the MP4 file format specification (mp4mux), and as such * the QuickTime file structure is nearly identical to the so-called ISO Base * Media file format defined in ISO 14496-12 (except for some media specific * parts). * * In turn, the latter ISO Base Media format was further specialized as a * Motion JPEG-2000 file format in ISO 15444-3 (mj2mux) * and in various 3GPP(2) specs (3gppmux). * The fragmented file features defined (only) in ISO Base Media are used by * ISMV files making up (a.o.) Smooth Streaming (ismlmux). * * A few properties (#GstQTMux:movie-timescale, #GstQTMux:trak-timescale) * allow adjusting some technical parameters, which might be useful in (rare) * cases to resolve compatibility issues in some situations. * * Some other properties influence the result more fundamentally. * A typical mov/mp4 file's metadata (aka moov) is located at the end of the file, * somewhat contrary to this usually being called "the header". However, a * #GstQTMux:faststart file will (with some effort) arrange this to be located * near start of the file, which then allows it e.g. to be played while * downloading. Alternatively, rather than having one chunk of metadata at start * (or end), there can be some metadata at start and most of the other data can * be spread out into fragments of #GstQTMux:fragment-duration. If such * fragmented layout is intended for streaming purposes, then * #GstISMLMux:streamable allows foregoing to add index metadata (at the end of * file). * * ## Example pipelines * |[ * gst-launch-1.0 v4l2src num-buffers=50 ! queue ! jp2kenc ! mj2mux ! filesink location=video.mj2 * ]| * Records a video stream captured from a v4l2 device, encodes it into JPEG-2000 * and muxes it into an mj2 file. * * Documentation last reviewed on 2011-04-21 */