Auf dieser Seite finden Sie einige Konfigurationsbeispiele für die Codierung einer Eingabemediendatei (d. h. ein ElementaryStream).
Videostream
VideoStream-Properties haben keine Abhängigkeiten. Sie können Attribute wie Auflösung (Höhe und Breite), Bitrate und Framerate unabhängig festlegen.
{
"videoStream": {
"h264": {
"profile": "high",
"preset": "veryfast",
"heightPixels": 360,
"widthPixels": 640,
"pixelFormat": "yuv420p",
"bitrateBps": 550000,
"rateControlMode": "vbr",
"crfLevel": 21,
"vbvSizeBits": 550000,
"vbvFullnessBits": 495000,
"gopDuration": "3s",
"entropyCoder": "cabac",
"bFrameCount": 3,
"frameRate": 30,
"aqStrength": 1
}
},
"key": "video-stream0"
}
Audiostream
Bestimmte AudioStream-Attribute sind unterschiedlich. Der Attributwert channelCount muss der Anzahl der Layouts im Array channelLayout entsprechen. Dieser Wert muss auch der Anzahl der Kanäle in einem zugewiesenen Eingabestream entsprechen.
Einfacher Audiostream
Das folgende Beispiel zeigt einen nicht zugeordneten Audiostream ohne Ton.
{
"audioStream": {
"codec": "aac",
"bitrateBps": 64000,
"channelCount": 2,
"channelLayout": [
"fl",
"fr"
],
"sampleRateHertz": 48000,
"languageCode": "en-US",
"displayName": "English"
},
"key": "audio-stream0"
}
Audiostream mit Zuordnung
Im Folgenden finden Sie ein Beispiel für einen mit Audio verknüpften Audiostream. Die Ausgabe-Stereo-AudioStream besteht aus den folgenden Eingaben:
- Spur 1
- Kanal 0
- Spur 1
- Kanal 1
Der Attributwert channelCount muss der Anzahl der unter mapping definierten Objekte entsprechen, die jeweils einen eigenen outputChannel haben.
{
"key": "audio-stream0",
"audioStream": {
"codec": "aac",
"bitrateBps": 64000,
"channelCount": 2,
"channelLayout": [
"fl",
"fr"
],
"sampleRateHertz": 48000,
"languageCode": "en-US",
"displayName": "English",
"mapping": [
{
"atomKey": "atom0",
"inputKey": "video_and_stereo_audio",
"inputTrack": 1,
"inputChannel": 0,
"outputChannel": 0,
"gainDb": 0
},
{
"atomKey": "atom0",
"inputKey": "video_and_stereo_audio",
"inputTrack": 1,
"inputChannel": 1,
"outputChannel": 1,
"gainDb": 0
}
]
}
}
Audiostream mit Mischpult
Im Folgenden finden Sie ein Beispiel für einen gemischten Audiostream. Die Ausgabe-Stereo-AudioStream besteht aus den folgenden Eingaben:
- Spur 2
- Kanal 0
- Kanal 2
- Kanal 4
- Spur 2
- Kanal 1
- Kanal 3
- Kanal 5
{
"key": "audio-stream0",
"audioStream": {
"codec": "aac",
"bitrateBps": 128000,
"channelCount": 2,
"mapping": [
{
"atomKey": "atom0",
"inputKey": "video_and_stereo_audio",
"inputTrack": 2,
"inputChannel": 0,
"outputChannel": 0,
"gainDb": 0
},
{
"atomKey": "atom0",
"inputKey": "video_and_stereo_audio",
"inputTrack": 2,
"inputChannel": 2,
"outputChannel": 0,
"gainDb": 0
},
{
"atomKey": "atom0",
"inputKey": "video_and_stereo_audio",
"inputTrack": 2,
"inputChannel": 4,
"outputChannel": 0,
"gainDb": 0
},
{
"atomKey": "atom0",
"inputKey": "video_and_stereo_audio",
"inputTrack": 2,
"inputChannel": 1,
"outputChannel": 1,
"gainDb": 0
},
{
"atomKey": "atom0",
"inputKey": "video_and_stereo_audio",
"inputTrack": 2,
"inputChannel": 3,
"outputChannel": 1,
"gainDb": 0
},
{
"atomKey": "atom0",
"inputKey": "video_and_stereo_audio",
"inputTrack": 2,
"inputChannel": 5,
"outputChannel": 1,
"gainDb": 0
}
],
"sampleRateHertz": 44100
}
}
Textstream
TextStream-Properties haben keine Abhängigkeiten. Sie können Attribute unabhängig festlegen.
In Textstreams kann eine Bearbeitungsliste verwendet werden, um die Ausgabedatei zu ändern. In den folgenden Abschnitten wird die Verwendung der Bearbeitungsliste zum Bereitstellen von Untertiteln erläutert.
Das folgende Beispiel zeigt einen Textstream mit einem Atom in der Bearbeitungsliste.
{
"editList":[
{
"key":"atom0",
"inputs":[
"video_input0",
"caption_input0"
],
"startTimeOffset":"0s",
"endTimeOffset":"300s"
}
],
"elementaryStreams":[
{
"key": "cea-stream0",
"textStream": {
"codec": "cea708",
"languageCode": "en-US",
"displayName": "English",
"mapping": [
{
"atomKey": "atom0",
"inputKey": "caption_input0",
"inputTrack": 0
}
]
}
}
]
}
Das folgende Beispiel zeigt einen Textstream mit zwei Atomen in der Bearbeitungsliste.
{
"editList":[
{
"key":"atom0",
"inputs":[
"video_input0",
"caption_input0"
],
"startTimeOffset":"0s",
"endTimeOffset":"300s"
},
{
"key":"atom1",
"inputs":[
"video_input1",
"caption_input1"
],
"startTimeOffset":"0s",
"endTimeOffset":"300s"
}
],
"elementaryStreams":[
{
"key": "cea-stream0",
"textStream": {
"codec": "cea708",
"languageCode": "en-US",
"displayName": "English",
"mapping": [
{
"atomKey": "atom0",
"inputKey": "caption_input0",
"inputTrack": 0
},
{
"atomKey": "atom1",
"inputKey": "caption_input1",
"inputTrack": 0
}
]
}
}
]
}
Erweitert
In den folgenden Abschnitten werden verschiedene erweiterte Konfigurationen beschrieben.
Nur Audioausgabe
Die folgende Konfiguration gibt nur Audio-Dateien im MP4- und TS-Format aus.
{
"config": {
"inputs": [
{
"key": "input0",
"uri": "gs://STORAGE_BUCKET_NAME/STORAGE_INPUT_VIDEO"
}
],
"elementaryStreams": [
{
"key": "audio-stream0",
"audioStream": {
"codec": "aac",
"bitrateBps": 64000,
"languageCode": "en-US",
"displayName": "English"
}
}
],
"muxStreams": [
{
"key": "audio-only-ts",
"fileName": "audio-only.ts",
"container": "ts",
"elementaryStreams": [
"audio-stream0"
]
},
{
"key": "audio-only-mp4",
"fileName": "audio-only.mp4",
"container": "mp4",
"elementaryStreams": [
"audio-stream0"
]
}
],
"manifests": [
{
"fileName": "manifest.m3u8",
"type": "HLS",
"muxStreams": [
"audio-only-ts"
]
}
],
"output": {
"uri": "gs://STORAGE_BUCKET_NAME/STORAGE_OUTPUT_FOLDER/"
}
}
}
MuxStream und fmp4
Ein MuxStream, der den fmp4-Container verwendet, kann nur einen einzigen ElementaryStream enthalten.
Verwenden Sie für diesen Container zwei MuxStreams: eine für Audio und eine für Videos:
"muxStreams":[
{
"key": "hd3-video",
"container": "fmp4",
"elementaryStreams":["video-stream1"]
},
{
"key": "hd3-audio",
"container": "fmp4",
"elementaryStreams":["audio-stream1"]
}
],
Streams in mehreren Manifesten wiederverwenden
Die folgende Beispielkonfiguration zeigt zwei Video- und eine Audiocodierung, die sowohl in HLS- als auch in DASH-Manifesten verwendet werden:
{
"config": {
"inputs": [
{
"key": "input0",
"uri": "gs://STORAGE_BUCKET_NAME/STORAGE_INPUT_VIDEO"
}
],
"elementaryStreams": [
{
"videoStream": {
"h264": {
"heightPixels": 360,
"widthPixels": 640,
"bitrateBps": 500000,
"frameRate": 30
}
},
"key": "video-stream0"
},
{
"videoStream": {
"h264": {
"heightPixels": 720,
"widthPixels": 1280,
"bitrateBps": 3200000,
"frameRate": 30
}
},
"key": "video-stream1"
},
{
"audioStream": {
"codec": "aac",
"bitrateBps": 64000,
"sampleRateHertz": 48000
},
"key": "audio-stream0"
}
],
"muxStreams": [
{
"key": "video-only-sd",
"container": "fmp4",
"elementaryStreams": [
"video-stream0"
]
},
{
"key": "video-only-hd",
"container": "fmp4",
"elementaryStreams": [
"video-stream1"
]
},
{
"key": "audio-only",
"container": "fmp4",
"elementaryStreams": [
"audio-stream0"
]
}
],
"manifests": [
{
"fileName": "manifest.m3u8",
"type": "HLS",
"muxStreams": [
"video-only-sd",
"video-only-hd",
"audio-only"
]
},
{
"fileName": "manifest.mpd",
"type": "DASH",
"muxStreams": [
"video-only-sd",
"video-only-hd",
"audio-only"
]
}
],
"output": {
"uri": "gs://STORAGE_BUCKET_NAME/STORAGE_OUTPUT_FOLDER/"
}
}
}
Empfohlene Einstellungen für die Transcodierung mehrerer Profile
Fügen Sie je nach Fall für die Ausgabeauflösung und Bitrate, abhängig von der Eingabeauflösung/Framerate (50/60 fps) den höheren Framerate-Schritt für 50/60 fps hinzu. Hinweis: Das Hinzufügen zusätzlicher Schritte erfordert mehr Rechenleistung. Dies ist die empfohlene Leiter:
| Auflösung (ScanMode)/Framerate | H.264 High Profile Bitrate (Kbit/s) |
|---|---|
| 170x96 p12/15 | 130 |
| 256x144 p25/30 | 240 |
| 416x234 p25/30 | 300 |
| 640x360 p25/30 | 400 |
| 768x432 p25/30 | 750 |
| 768x432 p25/30 | 1.100 |
| 960x540 p25/30 | 2200 |
| 1280x720 p25/30 | 3300 |
| 1280x720 p50/60 | 5500 |
| 1920x1080 p25/30 | 6.000 |
| 1920x1080 p50/60 | 9000 |
Die Empfehlungen für Audio basieren auf der Anzahl der Kanäle:
| Kanäle | AAC-Bitrate (kbit/s) |
|---|---|
| 2.0 | 64 |
| 2.0 | 160 |
| 5.1 | 384 |
Verwenden Sie diese Ausgabeleiter, um eine Konfiguration zu erstellen, die HLS- und MPEG-DASH-Manifeste mit verschiedenen Kombinationen ausgibt:
{
"config": {
"inputs": [
{
"key": "input0",
"uri": "gs://my-bucket/input0.mp4"
}
],
"elementaryStreams": [
{
"key": "video-stream0",
"videoStream": {
"h264": {
"heightPixels": 96,
"widthPixels": 170,
"bitrateBps": 130000,
"frameRate": 15,
"gopDuration": "4.0s",
"pixelFormat": "yuv420p",
"rateControlMode": "crf",
"crfLevel": 10,
"bFrameCount": 3,
"profile": "high",
"enableTwoPass": true,
"preset": "medium"
}
}
},
{
"key": "video-stream1",
"videoStream": {
"h264": {
"heightPixels": 144,
"widthPixels": 256,
"bitrateBps": 240000,
"frameRate": 30,
"gopDuration": "4.0s",
"pixelFormat": "yuv420p",
"rateControlMode": "crf",
"crfLevel": 10,
"bFrameCount": 3,
"profile": "high",
"enableTwoPass": true,
"preset": "medium"
}
}
},
{
"key": "video-stream2",
"videoStream": {
"h264": {
"heightPixels": 234,
"widthPixels": 416,
"bitrateBps": 300000,
"frameRate": 30,
"gopDuration": "4.0s",
"pixelFormat": "yuv420p",
"rateControlMode": "crf",
"crfLevel": 10,
"bFrameCount": 3,
"profile": "high",
"enableTwoPass": true,
"preset": "medium"
}
}
},
{
"key": "video-stream3",
"videoStream": {
"h264": {
"heightPixels": 360,
"widthPixels": 640,
"bitrateBps": 400000,
"frameRate": 30,
"gopDuration": "4.0s",
"pixelFormat": "yuv420p",
"rateControlMode": "crf",
"crfLevel": 10,
"bFrameCount": 3,
"profile": "high",
"enableTwoPass": true,
"preset": "medium"
}
}
},
{
"key": "video-stream4",
"videoStream": {
"h264": {
"heightPixels": 432,
"widthPixels": 768,
"bitrateBps": 1100000,
"frameRate": 30,
"gopDuration": "4.0s",
"pixelFormat": "yuv420p",
"rateControlMode": "crf",
"crfLevel": 10,
"bFrameCount": 3,
"profile": "high",
"enableTwoPass": true,
"preset": "medium"
}
}
},
{
"key": "video-stream5",
"videoStream": {
"h264": {
"heightPixels": 540,
"widthPixels": 960,
"bitrateBps": 2200000,
"frameRate": 30,
"gopDuration": "4.0s",
"pixelFormat": "yuv420p",
"rateControlMode": "crf",
"crfLevel": 10,
"bFrameCount": 3,
"profile": "high",
"enableTwoPass": true,
"preset": "medium"
}
}
},
{
"key": "video-stream6",
"videoStream": {
"h264": {
"heightPixels": 720,
"widthPixels": 1280,
"bitrateBps": 3300000,
"frameRate": 30,
"gopDuration": "4.0s",
"pixelFormat": "yuv420p",
"rateControlMode": "crf",
"crfLevel": 10,
"bFrameCount": 3,
"profile": "high",
"enableTwoPass": true,
"preset": "medium"
}
}
},
{
"key": "video-stream7",
"videoStream": {
"h264": {
"heightPixels": 720,
"widthPixels": 1280,
"bitrateBps": 5500000,
"frameRate": 60,
"gopDuration": "4.0s",
"pixelFormat": "yuv420p",
"rateControlMode": "crf",
"crfLevel": 10,
"bFrameCount": 6,
"profile": "high",
"enableTwoPass": true,
"preset": "medium"
}
}
},
{
"key": "video-stream8",
"videoStream": {
"h264": {
"heightPixels": 1080,
"widthPixels": 1920,
"bitrateBps": 6000000,
"frameRate": 30,
"gopDuration": "4.0s",
"pixelFormat": "yuv420p",
"rateControlMode": "crf",
"crfLevel": 10,
"bFrameCount": 3,
"profile": "high",
"enableTwoPass": true,
"preset": "medium"
}
}
},
{
"key": "video-stream9",
"videoStream": {
"h264": {
"heightPixels": 1080,
"widthPixels": 1920,
"bitrateBps": 9000000,
"frameRate": 60,
"gopDuration": "4.0s",
"pixelFormat": "yuv420p",
"rateControlMode": "crf",
"crfLevel": 10,
"bFrameCount": 6,
"profile": "high",
"enableTwoPass": true,
"preset": "medium"
}
}
},
{
"key": "audio-stream0",
"audioStream": {
"codec": "aac",
"bitrateBps": 32000
}
},
{
"key": "audio-stream1",
"audioStream": {
"codec": "aac",
"bitrateBps": 64000
}
},
{
"key": "audio-stream2",
"audioStream": {
"codec": "aac",
"bitrateBps": 96000
}
},
{
"key": "audio-stream3",
"audioStream": {
"codec": "aac",
"bitrateBps": 128000
}
},
{
"key": "audio-stream4",
"audioStream": {
"codec": "aac-he",
"bitrateBps": 160000
}
},
{
"key": "audio-stream5",
"audioStream": {
"codec": "aac-he-v2",
"bitrateBps": 384000
}
}
],
"muxStreams": [
{
"key": "1",
"container": "ts",
"elementaryStreams": [
"video-stream0",
"audio-stream0"
],
"segmentSettings": {
"segmentDuration": "4.0s",
"individualSegments": true
}
},
{
"key": "2",
"container": "ts",
"elementaryStreams": [
"video-stream1",
"audio-stream0"
],
"segmentSettings": {
"segmentDuration": "4.0s",
"individualSegments": true
}
},
{
"key": "3",
"container": "ts",
"elementaryStreams": [
"video-stream2",
"audio-stream1"
],
"segmentSettings": {
"segmentDuration": "4.0s",
"individualSegments": true
}
},
{
"key": "4",
"container": "ts",
"elementaryStreams": [
"video-stream3",
"audio-stream1"
],
"segmentSettings": {
"segmentDuration": "4.0s",
"individualSegments": true
}
},
{
"key": "5",
"container": "ts",
"elementaryStreams": [
"video-stream4",
"audio-stream2"
],
"segmentSettings": {
"segmentDuration": "4.0s",
"individualSegments": true
}
},
{
"key": "6",
"container": "ts",
"elementaryStreams": [
"video-stream5",
"audio-stream3"
],
"segmentSettings": {
"segmentDuration": "4.0s",
"individualSegments": true
}
},
{
"key": "7",
"container": "ts",
"elementaryStreams": [
"video-stream6",
"audio-stream3"
],
"segmentSettings": {
"segmentDuration": "4.0s",
"individualSegments": true
}
},
{
"key": "8",
"container": "ts",
"elementaryStreams": [
"video-stream7",
"audio-stream4"
],
"segmentSettings": {
"segmentDuration": "4.0s",
"individualSegments": true
}
},
{
"key": "9",
"container": "ts",
"elementaryStreams": [
"video-stream8",
"audio-stream4"
],
"segmentSettings": {
"segmentDuration": "4.0s",
"individualSegments": true
}
},
{
"key": "10",
"container": "ts",
"elementaryStreams": [
"video-stream9",
"audio-stream5"
],
"segmentSettings": {
"segmentDuration": "4.0s",
"individualSegments": true
}
},
{
"key": "video-1",
"container": "fmp4",
"elementaryStreams": [
"video-stream0"
],
"segmentSettings": {
"segmentDuration": "4.0s",
"individualSegments": true
}
},
{
"key": "video-2",
"container": "fmp4",
"elementaryStreams": [
"video-stream1"
],
"segmentSettings": {
"segmentDuration": "4.0s",
"individualSegments": true
}
},
{
"key": "video-3",
"container": "fmp4",
"elementaryStreams": [
"video-stream2"
],
"segmentSettings": {
"segmentDuration": "4.0s",
"individualSegments": true
}
},
{
"key": "video-4",
"container": "fmp4",
"elementaryStreams": [
"video-stream3"
],
"segmentSettings": {
"segmentDuration": "4.0s",
"individualSegments": true
}
},
{
"key": "video-5",
"container": "fmp4",
"elementaryStreams": [
"video-stream4"
],
"segmentSettings": {
"segmentDuration": "4.0s",
"individualSegments": true
}
},
{
"key": "video-6",
"container": "fmp4",
"elementaryStreams": [
"video-stream5"
],
"segmentSettings": {
"segmentDuration": "4.0s",
"individualSegments": true
}
},
{
"key": "video-7",
"container": "fmp4",
"elementaryStreams": [
"video-stream6"
],
"segmentSettings": {
"segmentDuration": "4.0s",
"individualSegments": true
}
},
{
"key": "video-8",
"container": "fmp4",
"elementaryStreams": [
"video-stream7"
],
"segmentSettings": {
"segmentDuration": "4.0s",
"individualSegments": true
}
},
{
"key": "video-9",
"container": "fmp4",
"elementaryStreams": [
"video-stream8"
],
"segmentSettings": {
"segmentDuration": "4.0s",
"individualSegments": true
}
},
{
"key": "video-10",
"container": "fmp4",
"elementaryStreams": [
"video-stream9"
],
"segmentSettings": {
"segmentDuration": "4.0s",
"individualSegments": true
}
},
{
"key": "audio-1",
"container": "fmp4",
"elementaryStreams": [
"audio-stream0"
],
"segmentSettings": {
"segmentDuration": "4.0s",
"individualSegments": true
}
},
{
"key": "audio-2",
"container": "fmp4",
"elementaryStreams": [
"audio-stream1"
],
"segmentSettings": {
"segmentDuration": "4.0s",
"individualSegments": true
}
},
{
"key": "audio-3",
"container": "fmp4",
"elementaryStreams": [
"audio-stream2"
],
"segmentSettings": {
"segmentDuration": "4.0s",
"individualSegments": true
}
},
{
"key": "audio-4",
"container": "fmp4",
"elementaryStreams": [
"audio-stream3"
],
"segmentSettings": {
"segmentDuration": "4.0s",
"individualSegments": true
}
},
{
"key": "audio-5",
"container": "fmp4",
"elementaryStreams": [
"audio-stream4"
],
"segmentSettings": {
"segmentDuration": "4.0s",
"individualSegments": true
}
},
{
"key": "audio-6",
"container": "fmp4",
"elementaryStreams": [
"audio-stream5"
],
"segmentSettings": {
"segmentDuration": "4.0s",
"individualSegments": true
}
}
],
"manifests": [
{
"fileName": "manifest.m3u8",
"type": "HLS",
"muxStreams": [
"10",
"9",
"8",
"7",
"6",
"5",
"4",
"3",
"2",
"1"
]
},
{
"fileName": "manifest.mpd",
"type": "DASH",
"muxStreams": [
"video-10",
"video-9",
"video-8",
"video-7",
"video-6",
"video-5",
"video-4",
"video-3",
"video-2",
"video-1",
"audio-6",
"audio-5",
"audio-4",
"audio-3",
"audio-2",
"audio-1"
]
}
],
"output": {
"uri": "gs://STORAGE_BUCKET_NAME/STORAGE_OUTPUT_FOLDER/"
}
}
}