On this page I saw there is the following description:
Note that a particular mobile device might support additional formats or file types that are not listed in these tables. In addition, if you use a MediaCodec directly, you can access any of the available media formats regardless of the supported file types and container formats.
If Open Camera supports MediaCodec API it's possible to provides supports for more media formats, and cross over some technical limits, e.g. WebM without sound.
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On this page I saw there is the following description:
If Open Camera supports MediaCodec API it's possible to provides supports for more media formats, and cross over some technical limits, e.g. WebM without sound.