"format": "m4f"和"streaming_delivery_format": "hls"。我們強烈建議設置"byte_range_segmenting": true，將媒體格式化為單個碎片MP4文件，而不是具有單獨的段文件。{
"skip_audio": true,
"base_url": "s3://my-bucket/",
"decoder_bitrate_cap": 900,
"decoder_buffer_size": 2400,
"filename": "file-640k.m3u8",
"max_frame_rate": 30,
"public": 1,
"type": "segmented",
"video_bitrate": 600,
"width": 400,
"format": "m4f",
"streaming_delivery_format" : "hls",
"byte_range_segmenting" : "true",
"max_hls_protocol_version" : 7
}加密
Zencoder還支持生成CBCS加密的分段MP4，HLS輸出以及必要的標頭，以與Fairplay DRM集成。對於每個輸出，請指定加密選項。一旦你有了這些密鑰，單個轉譯的 Zencoder API 結構是：
{
"input": "http://s3.amazonaws.com/zencodertesting/test.mov",
"outputs": [
{
"skip_audio": true,
"base_url": "s3://my-bucket/",
"decoder_bitrate_cap": 900,
"decoder_buffer_size": 2400,
"filename": "file-640k.m3u8",
"max_frame_rate": 30,
"public": 1,
"type": "segmented",
"video_bitrate": 600,
"width": 400,
"format": "m4f",
"streaming_delivery_format" : "hls",
"max_hls_protocol_version" : 7,
"byte_range_segmenting" : "true",
"drm_method" : "fairplay",
"encryption_method": "cbcs",
"encryption_key_url":"http://example.com/encryption.key",
"encryption_key": "a5f6a7d6ef5d6a7a02a23dd35dd56a63",
"encryption_iv" : "6345216ef5d6a7a02a23dd35d456987"
}
]
}注意事項
- 建議僅執行音頻和僅視頻分段輸出，並在生成播放列表時使用備用音頻。
- 在播放列表輸出中，請勿混用
ts和m4f輸出（導致音頻視頻同步問題）。 - zencoder目前尚不支持帶有片段mp4 HLS輸出的字幕。
完整的例子
播放清單可指定並參照不同位元率的多個輸出。這些設定符合我們 iOS 編碼指南中提供的準則。
音頻輸出
{
"outputs": [
{
"public": true,
"label": "Audio-64",
"base_url": "s3://my-bucket/Audio/64k/",
"filename": "audio_64k.m3u8",
"type": "segmented",
"segment_seconds": 6,
"byte_range_segmenting": true,
"format": "m4f",
"streaming_delivery_format": "hls",
"audio_codec": "aac",
"audio_bitrate": "64",
"skip_video": true
},
{
"public": true,
"label": "Audio-128",
"base_url": "s3://my-bucket/Audio/128k/",
"filename": "audio_128k.m3u8",
"type": "segmented",
"segment_seconds": 6,
"byte_range_segmenting": true,
"format": "m4f",
"streaming_delivery_format": "hls",
"audio_codec": "aac",
"audio_bitrate": "128",
"skip_video": true
}
]
}視頻輸出
{
"outputs": [
{
"public": true,
"label": "Rendition1",
"base_url": "s3://my-bucket/Rendition1",
"filename": "Rendition1.m3u8",
"type": "segmented",
"segment_seconds": 6,
"byte_range_segmenting": true,
"format": "m4f",
"streaming_delivery_format": "hls",
"generate_keyframe_manifest": "true",
"fixed_keyframe_interval": "true",
"keyframe_rate": 0.5,
"video_codec": "hevc",
"size": "416x234",
"video_bitrate": "145",
"skip_audio": true
},
{
"public": true,
"label": "Rendition2",
"base_url": "s3://my-bucket/Rendition2",
"filename": "Rendition2.m3u8",
"type": "segmented",
"segment_seconds": 6,
"byte_range_segmenting": true,
"format": "m4f",
"streaming_delivery_format": "hls",
"generate_keyframe_manifest": "true",
"fixed_keyframe_interval": "true",
"keyframe_rate": 0.5,
"video_codec": "hevc",
"size": "480x270",
"video_bitrate": "300",
"skip_audio": true
},
{
"public": true,
"label": "Rendition3",
"base_url": "s3://my-bucket/Rendition3",
"filename": "Rendition3.m3u8",
"type": "segmented",
"segment_seconds": 6,
"byte_range_segmenting": true,
"format": "m4f",
"streaming_delivery_format": "hls",
"generate_keyframe_manifest": "true",
"fixed_keyframe_interval": "true",
"keyframe_rate": 0.5,
"video_codec": "hevc",
"size": "640x360",
"video_bitrate": "660",
"skip_audio": true
},
{
"public": true,
"label": "Rendition4",
"base_url": "s3://my-bucket/Rendition4",
"filename": "Rendition4.m3u8",
"type": "segmented",
"segment_seconds": 6,
"byte_range_segmenting": true,
"format": "m4f",
"streaming_delivery_format": "hls",
"generate_keyframe_manifest": "true",
"fixed_keyframe_interval": "true",
"keyframe_rate": 0.5,
"video_codec": "hevc",
"size": "768x432",
"video_bitrate": "990",
"skip_audio": true
},
{
"public": true,
"label": "Rendition5",
"base_url": "s3://my-bucket/Rendition5",
"filename": "Rendition5.m3u8",
"type": "segmented",
"segment_seconds": 6,
"byte_range_segmenting": true,
"format": "m4f",
"streaming_delivery_format": "hls",
"generate_keyframe_manifest": "true",
"fixed_keyframe_interval": "true",
"keyframe_rate": 0.5,
"video_codec": "hevc",
"size": "960x540",
"video_bitrate": "1700",
"skip_audio": true
},
{
"public": true,
"label": "Rendition6",
"base_url": "s3://my-bucket/Rendition6",
"filename": "Rendition6.m3u8",
"type": "segmented",
"segment_seconds": 6,
"byte_range_segmenting": true,
"format": "m4f",
"streaming_delivery_format": "hls",
"generate_keyframe_manifest": "true",
"fixed_keyframe_interval": "true",
"keyframe_rate": 0.5,
"video_codec": "hevc",
"size": "1280x720",
"video_bitrate": "2400",
"skip_audio": true
},
{
"public": true,
"label": "Rendition7",
"base_url": "s3://my-bucket/Rendition7",
"filename": "Rendition7.m3u8",
"type": "segmented",
"segment_seconds": 6,
"byte_range_segmenting": true,
"format": "m4f",
"streaming_delivery_format": "hls",
"generate_keyframe_manifest": "true",
"fixed_keyframe_interval": "true",
"keyframe_rate": 0.5,
"video_codec": "hevc",
"size": "1920x1080",
"video_bitrate": "4500",
"skip_audio": true
},
{
"public": true,
"label": "Rendition8",
"base_url": "s3://my-bucket/Rendition8",
"filename": "Rendition8.m3u8",
"type": "segmented",
"segment_seconds": 6,
"byte_range_segmenting": true,
"format": "m4f",
"streaming_delivery_format": "hls",
"generate_keyframe_manifest": "true",
"fixed_keyframe_interval": "true",
"keyframe_rate": 0.5,
"video_codec": "hevc",
"size": "2560x1440",
"video_bitrate": "8100",
"skip_audio": true
},
{
"public": true,
"label": "Rendition9",
"base_url": "s3://my-bucket/Rendition9",
"filename": "Rendition9.m3u8",
"type": "segmented",
"segment_seconds": 6,
"byte_range_segmenting": true,
"format": "m4f",
"streaming_delivery_format": "hls",
"generate_keyframe_manifest": "true",
"fixed_keyframe_interval": "true",
"keyframe_rate": 0.5,
"video_codec": "hevc",
"size": "3840x2160",
"video_bitrate": "11600",
"skip_audio": true
}
]
}播放列表輸出
{
"outputs":[
{
"public": true,
"label": "master-playlist",
"base_url": "s3://my-bucket/",
"filename": "master_playlist.m3u8",
"hls_protocol_version": 7,
"type": "playlist",
"allow_skipped_sources": true,
"alternate_audio": {
"64k_audio": {
"path": "Audio/64k/audio_64k.m3u8",
"language": "en",
"default": true,
"source": "Audio-64"
},
"128k_audio": {
"path": "Audio/128k/audio_128k.m3u8",
"language": "en",
"source": "Audio-128"
}
},
"streams": [
{
"path": "Rendition1/Rendition1.m3u8",
"source": "Rendition1",
"audio": "64k_audio"
},
{
"path": "Rendition2/Rendition2.m3u8",
"source": "Rendition2",
"audio": "64k_audio"
},
{
"path": "Rendition3/Rendition3.m3u8",
"source": "Rendition3",
"audio": "128k_audio"
},
{
"path": "Rendition4/Rendition4.m3u8",
"source": "Rendition4",
"audio": "128k_audio"
},
{
"path": "Rendition5/Rendition5.m3u8",
"source": "Rendition5",
"audio": "128k_audio"
},
{
"path": "Rendition6/Rendition6.m3u8",
"source": "Rendition6",
"audio": "128k_audio"
},
{
"path": "Rendition7/Rendition7.m3u8",
"source": "Rendition7",
"audio": "128k_audio"
},
{
"path": "Rendition8/Rendition8.m3u8",
"source": "Rendition8",
"audio": "128k_audio"
},
{
"path": "Rendition9/Rendition9.m3u8",
"source": "Rendition9",
"audio": "128k_audio"
}
]
}
]
}