rerun::external::re_renderer::external::re_video::decode

Struct Chunk

Source 
pub struct Chunk {
    pub is_sync: bool,
    pub data: Vec<u8>,
    pub sample_idx: usize,
    pub frame_nr: usize,
    pub decode_timestamp: Time,
    pub presentation_timestamp: Time,
    pub duration: Time,
}
Expand description

One chunk of encoded video data, representing a single crate::Sample.

For details on how to interpret the data, see crate::Sample.

In MP4, one sample is one frame.

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§is_sync: bool

The start of a new crate::demux::GroupOfPictures?

This probably means this is a keyframe, and that and entire frame can be decoded from only this one sample (though I’m not 100% sure).

§data: Vec<u8>§sample_idx: usize

Which sample (frame) did this chunk come from?

This is the order of which the samples appear in the container, which is usually ordered by Self::decode_timestamp.

§frame_nr: usize

Which frame does this chunk belong to?

This is on the assumption that each sample produces a single frame, which is true for MP4.

This is the index of samples ordered by Self::presentation_timestamp.

§decode_timestamp: Time

Decode timestamp of this sample. Chunks are expected to be submitted in the order of decode timestamp.

decode_timestamp <= presentation_timestamp

§presentation_timestamp: Time

Presentation timestamp for the sample in this chunk. Often synonymous with composition_timestamp.

decode_timestamp <= presentation_timestamp

§duration: Time

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impl Freeze for Chunk

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impl Sync for Chunk

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