range

[3052]

where is the range set in this process? I checked here:

googlevideo/src/core/ServerAbrStream.ts

Lines 127 to 147 in 6b1801c

	const body = VideoPlaybackAbrRequest.encode({
	mediaInfo: mediaInfo,
	audioFormats: audioFormatIds,
	videoFormats: videoFormatIds,
	selectedFormats: this.initializedFormats.map((fmt) => fmt.formatId),
	videoPlaybackUstreamerConfig: base64ToU8(this.videoPlaybackUstreamerConfig),
	streamerContext: {
	field5: [],
	field6: [],
	poToken: this.poToken ? base64ToU8(this.poToken) : undefined,
	playbackCookie: this.playbackCookie ? PlaybackCookie.encode(this.playbackCookie).finish() : undefined,
	clientInfo: {
	clientName: 1,
	clientVersion: '2.2040620.05.00',
	osName: 'Windows',
	osVersion: '10.0'
	}
	},
	bufferedRange: this.initializedFormats.map((fmt) => fmt._state),
	field1000: []
	}).finish();

then here:

googlevideo/protos/video_streaming/video_playback_abr_request.proto

Lines 9 to 22 in 6b1801c

	message VideoPlaybackAbrRequest {
	optional MediaInfo media_info = 1;
	repeated .misc.FormatId selected_formats = 2;
	repeated BufferedRange buffered_range = 3;
	optional bytes video_playback_ustreamer_config = 5;
	optional Lo lo = 6;
	repeated .misc.FormatId audio_formats = 16;
	repeated .misc.FormatId video_formats = 17;
	optional StreamerContext streamer_context = 19;
	optional OQa field21 = 21;
	optional int32 field22 = 22;
	optional int32 field23 = 23;
	repeated Pqa field1000 = 1000;
	}

but if I check an example request from the official YouTube client, I only see these fields

1: {protobuf.Unknown{
2: {
5: {protobuf.Unknown{
6: {protobuf.Unknown{
16: {
17: {
19: {protobuf.Unknown{

[LuanRT]

Technically, there's no range.
You have to adjust the startTimeMs field in the MediaInfo object (and bufferedRanges to some extent) to get the desired media segments.

[luthfipun]

Hi @LuanRT do you know how to get the specific startTimeMs duration from the currentLength? Because for streaming, most players only pass the current length position to get a new segment or when seeking forward/backward. I’ve tried calculating it from the total duration, total content length, and current length, but the duration is inaccurate, or maybe I’ve made a mistake in my calculations