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Merge pull request #107188 from berarma/moviewriter-add-theora

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Add Ogg Theora support to MovieWriter
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Rémi Verschelde
2025-06-10 16:22:57 +02:00
parent 74f5b863bc a16b04fe07
commit cc9761c3f0
13 changed files with 774 additions and 53 deletions
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6
doc/classes/MovieWriter.xml
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@ -5,13 +5,15 @@
</brief_description>
<description>
Godot can record videos with non-real-time simulation. Like the [code]--fixed-fps[/code] [url=$DOCS_URL/tutorials/editor/command_line_tutorial.html]command line argument[/url], this forces the reported [code]delta[/code] in [method Node._process] functions to be identical across frames, regardless of how long it actually took to render the frame. This can be used to record high-quality videos with perfect frame pacing regardless of your hardware's capabilities.
Godot has 2 built-in [MovieWriter]s:
- AVI container with MJPEG for video and uncompressed audio ([code].avi[/code] file extension). Lossy compression, medium file sizes, fast encoding. The lossy compression quality can be adjusted by changing [member ProjectSettings.editor/movie_writer/mjpeg_quality]. The resulting file can be viewed in most video players, but it must be converted to another format for viewing on the web or by Godot with [VideoStreamPlayer]. MJPEG does not support transparency. AVI output is currently limited to a file of 4 GB in size at most.
Godot has 3 built-in [MovieWriter]s:
- OGV container with Theora for video and Vorbis for audio ([code].ogv[/code] file extension). Lossy compression, medium file sizes, fast encoding. The lossy compression quality can be adjusted by changing [member ProjectSettings.editor/movie_writer/video_quality] and [member ProjectSettings.editor/movie_writer/ogv/audio_quality]. The resulting file can be viewed in Godot with [VideoStreamPlayer] and most video players, but not web browsers as they don't support Theora.
- AVI container with MJPEG for video and uncompressed audio ([code].avi[/code] file extension). Lossy compression, medium file sizes, fast encoding. The lossy compression quality can be adjusted by changing [member ProjectSettings.editor/movie_writer/video_quality]. The resulting file can be viewed in most video players, but it must be converted to another format for viewing on the web or by Godot with [VideoStreamPlayer]. MJPEG does not support transparency. AVI output is currently limited to a file of 4 GB in size at most.
- PNG image sequence for video and WAV for audio ([code].png[/code] file extension). Lossless compression, large file sizes, slow encoding. Designed to be encoded to a video file with another tool such as [url=https://ffmpeg.org/]FFmpeg[/url] after recording. Transparency is currently not supported, even if the root viewport is set to be transparent.
If you need to encode to a different format or pipe a stream through third-party software, you can extend the [MovieWriter] class to create your own movie writers. This should typically be done using GDExtension for performance reasons.
[b]Editor usage:[/b] A default movie file path can be specified in [member ProjectSettings.editor/movie_writer/movie_file]. Alternatively, for running single scenes, a [code]movie_file[/code] metadata can be added to the root node, specifying the path to a movie file that will be used when recording that scene. Once a path is set, click the video reel icon in the top-right corner of the editor to enable Movie Maker mode, then run any scene as usual. The engine will start recording as soon as the splash screen is finished, and it will only stop recording when the engine quits. Click the video reel icon again to disable Movie Maker mode. Note that toggling Movie Maker mode does not affect project instances that are already running.
[b]Note:[/b] MovieWriter is available for use in both the editor and exported projects, but it is [i]not[/i] designed for use by end users to record videos while playing. Players wishing to record gameplay videos should install tools such as [url=https://obsproject.com/]OBS Studio[/url] or [url=https://www.maartenbaert.be/simplescreenrecorder/]SimpleScreenRecorder[/url] instead.
[b]Note:[/b] MJPEG support ([code].avi[/code] file extension) depends on the [code]jpg[/code] module being enabled at compile time (default behavior).
[b]Note:[/b] OGV support ([code].ogv[/code] file extension) depends on the [code]theora[/code] module being enabled at compile time (default behavior). Theora compression is only available in editor binaries.
</description>
<tutorials>
</tutorials>

22
doc/classes/ProjectSettings.xml
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@ -1105,21 +1105,31 @@
<member name="editor/movie_writer/mix_rate" type="int" setter="" getter="" default="48000">
The audio mix rate to use in the recorded audio when writing a movie (in Hz). This can be different from [member audio/driver/mix_rate], but this value must be divisible by [member editor/movie_writer/fps] to prevent audio from desynchronizing over time.
</member>
<member name="editor/movie_writer/mjpeg_quality" type="float" setter="" getter="" default="0.75">
The JPEG quality to use when writing a video to an AVI file, between [code]0.01[/code] and [code]1.0[/code] (inclusive). Higher [code]quality[/code] values result in better-looking output at the cost of larger file sizes. Recommended [code]quality[/code] values are between [code]0.75[/code] and [code]0.9[/code]. Even at quality [code]1.0[/code], JPEG compression remains lossy.
[b]Note:[/b] This does not affect the audio quality or writing PNG image sequences.
</member>
<member name="editor/movie_writer/movie_file" type="String" setter="" getter="" default="&quot;&quot;">
The output path for the movie. The file extension determines the [MovieWriter] that will be used.
Godot has 2 built-in [MovieWriter]s:
- AVI container with MJPEG for video and uncompressed audio ([code].avi[/code] file extension). Lossy compression, medium file sizes, fast encoding. The lossy compression quality can be adjusted by changing [member ProjectSettings.editor/movie_writer/mjpeg_quality]. The resulting file can be viewed in most video players, but it must be converted to another format for viewing on the web or by Godot with [VideoStreamPlayer]. MJPEG does not support transparency. AVI output is currently limited to a file of 4 GB in size at most.
Godot has 3 built-in [MovieWriter]s:
- OGV container with Theora for video and Vorbis for audio ([code].ogv[/code] file extension). Lossy compression, medium file sizes, fast encoding. The lossy compression quality can be adjusted by changing [member ProjectSettings.editor/movie_writer/video_quality] and [member ProjectSettings.editor/movie_writer/ogv/audio_quality]. The resulting file can be viewed in Godot with [VideoStreamPlayer] and most video players, but not web browsers as they don't support Theora.
- AVI container with MJPEG for video and uncompressed audio ([code].avi[/code] file extension). Lossy compression, medium file sizes, fast encoding. The lossy compression quality can be adjusted by changing [member ProjectSettings.editor/movie_writer/video_quality]. The resulting file can be viewed in most video players, but it must be converted to another format for viewing on the web or by Godot with [VideoStreamPlayer]. MJPEG does not support transparency. AVI output is currently limited to a file of 4 GB in size at most.
- PNG image sequence for video and WAV for audio ([code].png[/code] file extension). Lossless compression, large file sizes, slow encoding. Designed to be encoded to a video file with another tool such as [url=https://ffmpeg.org/]FFmpeg[/url] after recording. Transparency is currently not supported, even if the root viewport is set to be transparent.
If you need to encode to a different format or pipe a stream through third-party software, you can extend this [MovieWriter] class to create your own movie writers.
When using PNG output, the frame number will be appended at the end of the file name. It starts from 0 and is padded with 8 digits to ensure correct sorting and easier processing. For example, if the output path is [code]/tmp/hello.png[/code], the first two frames will be [code]/tmp/hello00000000.png[/code] and [code]/tmp/hello00000001.png[/code]. The audio will be saved at [code]/tmp/hello.wav[/code].
</member>
<member name="editor/movie_writer/ogv/audio_quality" type="float" setter="" getter="" default="0.5">
The audio encoding quality to use when writing Vorbis audio to a file, between [code]-0.1[/code] and [code]1.0[/code] (inclusive). Higher [code]quality[/code] values result in better-sounding output at the cost of larger file sizes. Even at quality [code]1.0[/code], compression remains lossy.
[b]Note:[/b] This does not affect video quality, which is controlled by [member editor/movie_writer/video_quality] instead.
</member>
<member name="editor/movie_writer/ogv/encoding_speed" type="int" setter="" getter="" default="4">
The tradeoff between encoding speed and compression efficiency. Speed [code]1[/code] is the slowest but provides the best compression. Speed [code]4[/code] is the fastest but provides the worst compression. Video quality is generally not affected significantly by this setting.
</member>
<member name="editor/movie_writer/ogv/keyframe_interval" type="int" setter="" getter="" default="64">
Forces keyframes at the specified interval (in frame count). Higher values can improve compression up to a certain level at the expense of higher latency when seeking.
</member>
<member name="editor/movie_writer/speaker_mode" type="int" setter="" getter="" default="0">
The speaker mode to use in the recorded audio when writing a movie. See [enum AudioServer.SpeakerMode] for possible values.
</member>
<member name="editor/movie_writer/video_quality" type="float" setter="" getter="" default="0.75">
The video encoding quality to use when writing a Theora or AVI (MJPEG) video to a file, between [code]0.0[/code] and [code]1.0[/code] (inclusive). Higher [code]quality[/code] values result in better-looking output at the cost of larger file sizes. Recommended [code]quality[/code] values are between [code]0.75[/code] and [code]0.9[/code]. Even at quality [code]1.0[/code], compression remains lossy.
</member>
<member name="editor/naming/default_signal_callback_name" type="String" setter="" getter="" default="&quot;_on_{node_name}_{signal_name}&quot;">
The format of the default signal callback name (in the Signal Connection Dialog). The following substitutions are available: [code]{NodeName}[/code], [code]{nodeName}[/code], [code]{node_name}[/code], [code]{SignalName}[/code], [code]{signalName}[/code], and [code]{signal_name}[/code].
</member>