Old Android & iPhone, Apple TV, PlayStation consoles, Roku, Adobe Premiere Pro, etc. Most people want to convert HEVC video to AVC MP4 due to the compatibility. to stream higher quality video at manageable bit rates. Nowadays, HEVC is primarily used to compress 4K resolution videos and has enabled broadcasters, video-streaming services, etc.

For example, the average bit rate of 1080p video for HEVC is 62% lower than that of AVC (H.264, x264, or MPEG-4 Part 10). It promises 50% more efficiency possible than AVC, meaning that you can keep the HEVC video half the size of AVC at the same quality level. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.HEVC (H.265, x265, MPEG-H Part 2), short for High Efficiency Video Coding, is a new video compression standard. Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.

Ffmpeg hevc