Sample entries and random access

A device for retrieving video data, the device comprising:

• a memory configured to store video data;
• and
• one or more processors implemented in circuitry and configured to:
• receive data describing a sample entry type for a sample of a video bitstream, the sample entry type being one of ‘hev1’ or ‘hev2,’ wherein the sample comprises video data encoded according to one of High-Efficiency Video Coding (HEVC) or layered HEVC (L-HEVC), and wherein one or more other samples including video data precede the sample in the video bitstream in decoding order, wherein the video data of the sample is included in a track of a plurality of tracks of a file, the plurality of tracks including a subset of the plurality of tracks including single-layer or multi-layer video data;
• in response to a determination that convenient random access is enabled for one of the subset of the plurality of tracks having a lowest temporal sub-layer, determine that convenient random access is enabled for each of the plurality of tracks;
• in response to the sample entry type being ‘hev1’ or ‘hev2’ and the sample comprising the video data encoded according to one of HEVC or L-HEVC, retrieve the sample to perform random access using the sample, without retrieving the video data of any of the one or more other samples that precede the sample, and without retrieving parameter sets of any previous samples of the video bitstream in decoding order;
• and
• store the retrieved sample to the memory.

A device for retrieving video data, the device comprising:

• means for receiving data describing a sample entry type for a sample of a video bitstream, the sample entry type being one of ‘hev1’ or ‘hev2,’ wherein the sample comprises video data encoded according to one of High-Efficiency Video Coding (HEVC) or layered HEVC (L-HEVC), and wherein one or more other samples including video data precede the sample in the video bitstream in decoding order, wherein the video data of the sample is included in a track of a plurality of tracks of a file, the plurality of tracks including a subset of the plurality of tracks including single-layer or multi-layer video data;
• means for determining that convenient random access is enabled for each of the plurality of tracks in response to a determination that convenient random access is enabled for one of the subset of the plurality of tracks having a lowest temporal sub-layer;
• and
• means for retrieving the sample to perform random access using the sample in response to the sample entry type being ‘hev1’ or ‘hev2’ and the sample comprising the video data encoded according to one of HEVC or L-HEVC, without retrieving the video data of any of the one or more other samples that precede the sample, and without retrieving parameter sets of any previous samples of the video bitstream in decoding order.

A non-transitory, computer-readable storage medium having stored thereon instructions that, when executed, cause a processor to:

• receive data describing a sample entry type for a sample of a video bitstream, the sample entry type being one of ‘hev1’ or ‘hev2,’ wherein the sample comprises video data encoded according to one of High-Efficiency Video Coding (HEVC) or layered HEVC (L-HEVC), and wherein one or more other samples including video data precede the sample in the video bitstream in decoding order, wherein the video data of the sample is included in a track of a plurality of tracks of a file, the plurality of tracks including a subset of the plurality of tracks including single-layer or multi-layer video data;
• in response to a determination that convenient random access is enabled for one of the subset of the plurality of tracks having a lowest temporal sub-layer, determine that convenient random access is enabled for each of the plurality of tracks;
• and
• in response to the sample entry type being ‘hev1’ or ‘hev2’ and the sample comprising the video data encoded according to one of HEVC or L-HEVC, retrieve the sample to perform random access using the sample, without retrieving the video data of any of the one or more other samples that precede the sample, and without retrieving parameter sets of any previous samples of the video bitstream in decoding order.