feat(media): support cloud codec via ffmpeg

Author: PIKACHUIM

internal/bootstrap/data/setting.go

@@ -305,6 +305,16 @@ videotoolbox = macOS 硬件加速`},
 			Help: `单个转码任务超时分钟数，超时自动失败`},
 		{Key: conf.TranscodeLocalConcurrency, Value: "1", Type: conf.TypeNumber, Group: model.TRANSCODE, Flag: model.PRIVATE,
 			Help: `本机内置 worker 同时执行的转码任务数(local/hybrid 模式生效)`},
+		{Key: conf.TranscodeIdleTimeoutSec, Value: "90", Type: conf.TypeNumber, Group: model.TRANSCODE, Flag: model.PRIVATE,
+			Help: `播放端无请求多少秒后自动停止转码（默认90秒，0=禁用）`},
+		{Key: conf.TranscodeChunkDurationSec, Value: "60", Type: conf.TypeNumber, Group: model.TRANSCODE, Flag: model.PRIVATE,
+			Help: `每个 chunk 时长(秒)，越大每段缓冲越长但 ffmpeg 进程切换越少（默认60秒）`},
+		{Key: conf.TranscodeMaxChunkConcurrency, Value: "2", Type: conf.TypeNumber, Group: model.TRANSCODE, Flag: model.PRIVATE,
+			Help: `单个视频任务最多同时运行的 chunk 数（默认2，越大并发越高但 CPU/GPU 占用越多）`},
+		{Key: conf.TranscodeChunkIdleSec, Value: "60", Type: conf.TypeNumber, Group: model.TRANSCODE, Flag: model.PRIVATE,
+			Help: `chunk 多久没被访问就 kill ffmpeg 释放资源（默认60秒）`},
+		{Key: conf.TranscodeChunkPrefetch, Value: "true", Type: conf.TypeBool, Group: model.TRANSCODE, Flag: model.PRIVATE,
+			Help: `当前 chunk 转码进度过半时，是否预启动下一个 chunk（默认开启，可让顺序播放无缝衔接）`},
 	}
 	additionalSettingItems := tool.Tools.Items()
 	// 固定顺序

internal/conf/const.go

@@ -195,6 +195,11 @@ const (
 	TranscodeJobTimeoutMin      = "transcode_job_timeout_min"      // 单个任务超时分钟
 	TranscodeLocalConcurrency   = "transcode_local_concurrency"    // 本地内置 worker 并发数(run_mode=local/hybrid 时生效)
 	TranscodeIdleTimeoutSec     = "transcode_idle_timeout_sec"     // 播放端无请求多少秒后自动停止转码（默认90秒）
+	// === 智能 chunk 调度相关 ===
+	TranscodeChunkDurationSec    = "transcode_chunk_duration_sec"    // 每个 chunk 时长(秒)，将整个视频分成多个 chunk 按需转码（默认60秒）
+	TranscodeMaxChunkConcurrency = "transcode_max_chunk_concurrency" // 单个 Job 最多同时运行的 chunk 数（默认2）
+	TranscodeChunkIdleSec        = "transcode_chunk_idle_sec"        // chunk 多久没被访问就 kill ffmpeg 释放资源（默认60秒）
+	TranscodeChunkPrefetch       = "transcode_chunk_prefetch"        // 当前 chunk 转码进度过半时，是否预启动下一个 chunk（默认true）
 )
 
 const (