Crate gstreamer_pbutils

Expand description

gstreamer-pbutils-rs

GStreamer (Pbutils library) bindings for Rust. Documentation can be found here.

These bindings are providing a safe API that can be used to interface with GStreamer, e.g. for writing GStreamer-based applications and GStreamer plugins.

The bindings are mostly autogenerated with gir based on the GObject-Introspection API metadata provided by the GStreamer project.

To build the GStreamer bindings or anything depending on them, you need to have at least GStreamer 1.8 and gst-plugins-base 1.8 installed. In addition, some of the examples/tutorials require various GStreamer plugins to be available, which can be found in gst-plugins-base, gst-plugins-good, gst-plugins-bad, gst-plugins-ugly and/or gst-libav.

Linux/BSDs

You need to install the above mentioned packages with your distributions package manager, or build them from source.

On Debian/Ubuntu they can be installed with

$ apt-get install libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev \
      gstreamer1.0-plugins-base gstreamer1.0-plugins-good \
      gstreamer1.0-plugins-bad gstreamer1.0-plugins-ugly \
      gstreamer1.0-libav libgstrtspserver-1.0-dev libges-1.0-dev

The minimum required version of the above libraries is >= 1.8. If you build the gstreamer-player sub-crate, or any of the examples that depend on gstreamer-player, you must ensure that in addition to the above packages, libgstreamer-plugins-bad1.0-dev is installed and that the version is >= 1.12. See the Cargo.toml files for the full details,

$ # Only if you wish to install gstreamer-player, make sure the version
$ # of this package is >= 1.12.
$ apt-get install libgstreamer-plugins-bad1.0-dev

Package names on other distributions should be similar. Please submit a pull request with instructions for yours.

macOS

You can install GStreamer and the plugins via Homebrew or by installing the binaries provided by the GStreamer project.

Homebrew

Homebrew only installs various plugins if explicitly enabled, so some extra --with-* flags may be required.

$ brew install gstreamer gst-plugins-base gst-plugins-good \
      gst-plugins-bad gst-plugins-ugly gst-libav gst-rtsp-server \
      gst-editing-services --with-orc --with-libogg --with-opus \
      --with-pango --with-theora --with-libvorbis --with-libvpx \
      --enable-gtk3

If you wish to install the gstreamer-player sub-crate, make sure the version of these libraries is >= 1.12. Otherwise, a version >= 1.8 is sufficient.

GStreamer Binaries

You need to download the two .pkg files from the GStreamer website and install them, e.g. gstreamer-1.0-1.12.3-x86_64.pkg and gstreamer-1.0-devel-1.12.3-x86_64.pkg.

After installation, you also need to install pkg-config (e.g. via Homebrew) and set the PKG_CONFIG_PATH environment variable

$ export PKG_CONFIG_PATH="/Library/Frameworks/GStreamer.framework/Versions/Current/lib/pkgconfig${PKG_CONFIG_PATH:+:$PKG_CONFIG_PATH}"

Windows

You can install GStreamer and the plugins via MSYS2 with pacman or by installing the binaries provided by the GStreamer project.

MSYS2 / pacman

$ pacman -S glib2-devel pkg-config \
      mingw-w64-x86_64-gstreamer mingw-w64-x86_64-gst-plugins-base \
      mingw-w64-x86_64-gst-plugins-good mingw-w64-x86_64-gst-plugins-bad \
      mingw-w64-x86_64-gst-plugins-ugly mingw-w64-x86_64-gst-libav \
      mingw-w64-x86_64-gst-rtsp-server

If you wish to install the gstreamer-player sub-crate, make sure the version of these libraries is >= 1.12. Otherwise, a version >= 1.8 is sufficient.

Note that the version of pkg-config included in MSYS2 is known to have problems compiling GStreamer, so you may need to install another version. One option would be pkg-config-lite.

GStreamer Binaries

You need to download the two .msi files for your platform from the GStreamer website and install them, e.g. gstreamer-1.0-x86_64-1.12.3.msi and gstreamer-1.0-devel-x86_64-1.12.3.msi.

After installation, you also need to install pkg-config (e.g. via MSYS2 or from here) and set the PKG_CONFIG_PATH environment variable

$ export PKG_CONFIG_PATH="c:\\gstreamer\\1.0\\x86_64\\lib\\pkgconfig${PKG_CONFIG_PATH:+:$PKG_CONFIG_PATH}"

Getting Started

The API reference can be found here, however it is only the Rust API reference and does not explain any of the concepts.

For getting started with GStreamer development, the best would be to follow the documentation on the GStreamer website, especially the Application Development Manual. While being C-centric, it explains all the fundamental concepts of GStreamer and the code examples should be relatively easily translatable to Rust. The API is basically the same, function/struct names are the same and everything is only more convenient (hopefully) and safer.

In addition there are tutorials on the GStreamer website. Many of them were ported to Rust already and the code can be found in the tutorials directory.

Some further examples for various aspects of GStreamer and how to use it from Rust can be found in the examples directory.

Various GStreamer plugins written in Rust can be found in the gst-plugins-rs repository.

LICENSE

gstreamer-rs and all crates contained in here are licensed under either of

Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

GStreamer itself is licensed under the Lesser General Public License version 2.1 or (at your option) any later version: https://www.gnu.org/licenses/lgpl-2.1.html

Contribution

Any kinds of contributions are welcome as a pull request.

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in gstreamer-rs by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.

Re-exports

pub use ffi;

pub use glib;

pub use gst;

pub use crate::functions::*;

Modules

discoverer_stream_info

encoding_profile

functions

prelude

Structs

Discoverer

The Discoverer is a utility object which allows to get as much information as possible from one or many URIs.

DiscovererAudioInfo

DiscovererStreamInfo specific to audio streams.

DiscovererContainerInfo

DiscovererStreamInfo specific to container streams.

DiscovererInfo

Structure containing the information of a URI analyzed by Discoverer.

DiscovererSerializeFlags

You can use these flags to control what is serialized by DiscovererInfo::to_variant()

DiscovererStreamInfo

Base structure for information concerning a media stream. Depending on the stream type, one can find more media-specific information in DiscovererAudioInfo, DiscovererVideoInfo, and DiscovererContainerInfo.

DiscovererSubtitleInfo

DiscovererStreamInfo specific to subtitle streams (this includes text and image based ones).

DiscovererVideoInfo

DiscovererStreamInfo specific to video streams (this includes images).

EncodingAudioProfile

Variant of EncodingProfile for audio streams.

EncodingContainerProfile

Encoding profiles for containers. Keeps track of a list of EncodingProfile

EncodingProfile

The opaque base class object for all encoding profiles. This contains generic information like name, description, format and preset.

EncodingTarget

Collection of EncodingProfile for a specific target or use-case.

EncodingVideoProfile

Variant of EncodingProfile for video streams, allows specifying the pass.

PbUtilsCapsDescriptionFlagsv1_20

Flags that are returned by pb_utils_get_caps_description_flags() and describe the format of the caps.

Enums

DiscovererResult

Result values for the discovery process.

Functions

codec_utils_aac_get_channelsv1_10

Returns the channels of the given AAC stream.

codec_utils_aac_get_index_from_sample_rate

Translates the sample rate to the index corresponding to it in AAC spec.

codec_utils_aac_get_level

Determines the level of a stream as defined in ISO/IEC 14496-3. For AAC LC streams, the constraints from the AAC audio profile are applied. For AAC Main, LTP, SSR and others, the Main profile is used.

codec_utils_aac_get_profile

Returns the profile of the given AAC stream as a string. The profile is normally determined using the AudioObjectType field which is in the first 5 bits of audio_config

codec_utils_aac_get_sample_ratev1_10

Translates the sample rate index found in AAC headers to the actual sample rate.

codec_utils_aac_get_sample_rate_from_index

Translates the sample rate index found in AAC headers to the actual sample rate.

codec_utils_caps_get_mime_codecv1_20

Converts caps to a RFC 6381 compatible codec string if possible.

codec_utils_h264_get_level

Converts the level indication (level_idc) in the stream’s sequence parameter set into a string. The SPS is expected to have the same format as for codec_utils_h264_get_profile().

codec_utils_h264_get_level_idc

Transform a level string from the caps into the level_idc

codec_utils_h264_get_profile

Converts the profile indication (profile_idc) in the stream’s sequence parameter set into a string. The SPS is expected to have the following format, as defined in the H.264 specification. The SPS is viewed as a bitstream here, with bit 0 being the most significant bit of the first byte.

codec_utils_h265_get_level

Converts the level indication (general_level_idc) in the stream’s profile_tier_level structure into a string. The profiel_tier_level is expected to have the same format as for codec_utils_h264_get_profile().

codec_utils_h265_get_level_idc

Transform a level string from the caps into the level_idc

codec_utils_h265_get_profile

Converts the profile indication (general_profile_idc) in the stream’s profile_level_tier structure into a string. The profile_tier_level is expected to have the following format, as defined in the H.265 specification. The profile_tier_level is viewed as a bitstream here, with bit 0 being the most significant bit of the first byte.

codec_utils_h265_get_tier

Converts the tier indication (general_tier_flag) in the stream’s profile_tier_level structure into a string. The profile_tier_level is expected to have the same format as for codec_utils_h264_get_profile().

codec_utils_mpeg4video_get_level

Converts the level indication in the stream’s visual object sequence into a string. vis_obj_seq is expected to be the data following the visual object sequence start code. Only the first byte (profile_and_level_indication) is used.

codec_utils_mpeg4video_get_profile

Converts the profile indication in the stream’s visual object sequence into a string. vis_obj_seq is expected to be the data following the visual object sequence start code. Only the first byte (profile_and_level_indication) is used.

codec_utils_opus_create_caps_from_header

Creates Opus caps from the given OpusHead header and comment header comments.

encoding_list_all_targets

List all available EncodingTarget for the specified category, or all categories if categoryname is None.

encoding_list_available_categories

Lists all EncodingTarget categories present on disk.

pb_utils_get_caps_description_flagsv1_20

Returns flags that describe the format of the caps if known. No flags are set for unknown caps.

pb_utils_get_element_description

Returns a localised string describing the given element, for use in error dialogs or other messages to be seen by the user. Should never return NULL unless factory_name is invalid.

pb_utils_get_file_extension_from_capsv1_20

Returns a possible file extension for the given caps, if known.

pb_utils_get_sink_description

Returns a localised string describing a sink element handling the protocol specified in protocol, for use in error dialogs or other messages to be seen by the user. Should never return NULL unless protocol is invalid.

pb_utils_get_source_description

Returns a localised string describing a source element handling the protocol specified in protocol, for use in error dialogs or other messages to be seen by the user. Should never return NULL unless protocol is invalid.

plugins_base_version

Gets the version number of the GStreamer Plugins Base libraries.

plugins_base_version_string

This function returns a string that is useful for describing this version of GStreamer’s gst-plugins-base libraries to the outside world: user agent strings, logging, about dialogs …

Crate gstreamer_pbutils

gstreamer-pbutils-rs

Table of Contents

Installation

Linux/BSDs

macOS

Homebrew

GStreamer Binaries

Windows

MSYS2 / pacman

GStreamer Binaries

Getting Started

LICENSE

Contribution

Re-exports

Modules

Structs

Enums

Functions