list formats and provide them for download

app/main.go

@@ -5,6 +5,7 @@ import (
 	"log"
 	"os"
 	"os/signal"
+	"sort"
 	"sync"
 	"syscall"
 	"time"
@@ -15,6 +16,9 @@ import (
 // InteractionState holds the state for a specific interaction
 type InteractionState struct {
 	URL           string
+	FormatOptions *FormatOptions
+	VideoFormatID string
+	AudioFormatID string
 }
 
 // DownloadResult represents the result of an async download operation
@@ -27,7 +31,7 @@ type DownloadResult struct {
 }
 
 // startAsyncDownload initiates a download in a goroutine and handles progress updates
-func startAsyncDownload(s *discordgo.Session, i *discordgo.InteractionCreate, url, audioFormat, outputDir string) {
+func startAsyncDownload(s *discordgo.Session, i *discordgo.InteractionCreate, url, videoFormatID, audioFormatID, outputDir string) {
 	progressChan := make(chan ProgressUpdate, 1)
 	resultChan := make(chan DownloadResult, 1)
 
@@ -41,21 +45,26 @@ func startAsyncDownload(s *discordgo.Session, i *discordgo.InteractionCreate, ur
 					Success: false,
 					Message: fmt.Sprintf("Download failed: %v", r),
 					URL:     url,
-					Format:  audioFormat,
+					Format:  fmt.Sprintf("video: %s, audio: %s", videoFormatID, audioFormatID),
 					Error:   fmt.Errorf("%v", r),
 				}
 			}
 		}()
 
 		// Call downloadVideo (it panics on error instead of returning error)
-		downloadVideo(outputDir, url, DownloadOptions{EmbedThumbnail: true, IncludeSubtitles: true}, progressChan)
+		downloadVideo(outputDir, url, DownloadOptions{
+			EmbedThumbnail:   true,
+			IncludeSubtitles: true,
+			VideoFormatID:    videoFormatID,
+			AudioFormatID:    audioFormatID,
+		}, progressChan)
 
 		// If we reach here, download was successful
 		resultChan <- DownloadResult{
 			Success: true,
 			Message: "Video Downloaded Successfully!",
 			URL:     url,
-			Format:  audioFormat,
+			Format:  fmt.Sprintf("video: %s, audio: %s", videoFormatID, audioFormatID),
 			Error:   nil,
 		}
 	}()
@@ -64,7 +73,7 @@ func startAsyncDownload(s *discordgo.Session, i *discordgo.InteractionCreate, ur
 	go func() {
 		// First update the original ephemeral message with "Processing..."
 		_, err := s.InteractionResponseEdit(i.Interaction, &discordgo.WebhookEdit{
-			Content: ptr("🔄 Processing download...\nURL: " + url + "\nAudio: " + audioFormat),
+			Content: ptr(fmt.Sprintf("🔄 Processing download...\nURL: %s\nVideo: %s\nAudio: %s", url, videoFormatID, audioFormatID)),
 		})
 		if err != nil {
 			log.Printf("Error updating interaction: %v", err)
@@ -188,7 +197,109 @@ func main() {
 
 	var componentHandlers = map[string]func(s *discordgo.Session, i *discordgo.InteractionCreate){
 		"video_select": func(s *discordgo.Session, i *discordgo.InteractionCreate) {
-			// Update components
+			// Get interaction state with fallback search
+			var state *InteractionState
+
+			// First try current token
+			state = getInteractionState(i.Interaction.Token)
+
+			// If not found, try to find state associated with this interaction context
+			if state == nil {
+				interactionStatesMutex.RLock()
+				for token, s := range interactionStates {
+					if s != nil && s.FormatOptions != nil {
+						// Found a state, transfer it to current token
+						state = s
+						// Copy to current token and clean up old one
+						interactionStatesMutex.RUnlock()
+						setInteractionState(i.Interaction.Token, state)
+						deleteInteractionState(token)
+						break
+					}
+				}
+				if state == nil {
+					interactionStatesMutex.RUnlock()
+				}
+			}
+			if state == nil || state.FormatOptions == nil {
+				s.InteractionRespond(i.Interaction, &discordgo.InteractionResponse{
+					Type: discordgo.InteractionResponseChannelMessageWithSource,
+					Data: &discordgo.InteractionResponseData{
+						Content: "Error: Session expired. Please start over with /download.",
+						Flags:   discordgo.MessageFlagsEphemeral,
+					},
+				})
+				return
+			}
+
+			// Get selected video format
+			selectedValues := i.MessageComponentData().Values
+			if len(selectedValues) == 0 {
+				s.InteractionRespond(i.Interaction, &discordgo.InteractionResponse{
+					Type: discordgo.InteractionResponseChannelMessageWithSource,
+					Data: &discordgo.InteractionResponseData{
+						Content: "Error: No video format selected",
+						Flags:   discordgo.MessageFlagsEphemeral,
+					},
+				})
+				return
+			}
+
+			// Store selected video format ID
+			state.VideoFormatID = selectedValues[0]
+			setInteractionState(i.Interaction.Token, state)
+
+			// Build audio format options
+			audioMenuOptions := []discordgo.SelectMenuOption{}
+			for _, aOpt := range state.FormatOptions.AudioOptions {
+				label := aOpt.Format
+				if aOpt.Language != nil {
+					label += fmt.Sprintf(" [%s]", *aOpt.Language)
+				}
+				if aOpt.TBR != nil {
+					label += fmt.Sprintf(" (%.0fkbps)", *aOpt.TBR)
+				}
+
+				// Discord has a 100 char limit on labels
+				if len(label) > 100 {
+					label = label[:97] + "..."
+				}
+
+				audioMenuOptions = append(audioMenuOptions, discordgo.SelectMenuOption{
+					Label: label,
+					Value: aOpt.FormatID,
+				})
+
+				// Discord has a limit of 25 options per select menu
+				if len(audioMenuOptions) >= 25 {
+					break
+				}
+			}
+
+			// Build video format options (to keep them visible but disabled)
+			videoMenuOptions := []discordgo.SelectMenuOption{}
+			for _, vOpt := range state.FormatOptions.VideoOptions {
+				label := fmt.Sprintf("%s (%s", vOpt.Resolution, vOpt.Ext)
+				if vOpt.TBR != nil {
+					label += fmt.Sprintf(", %.0fkbps", *vOpt.TBR)
+				}
+				label += ")"
+
+				if len(label) > 100 {
+					label = label[:97] + "..."
+				}
+
+				videoMenuOptions = append(videoMenuOptions, discordgo.SelectMenuOption{
+					Label: label,
+					Value: vOpt.FormatID,
+				})
+
+				if len(videoMenuOptions) >= 25 {
+					break
+				}
+			}
+
+			// Update components - disable video select, enable audio select
 			updatedComponents := []discordgo.MessageComponent{
 				discordgo.ActionsRow{
 					Components: []discordgo.MessageComponent{
@@ -197,20 +308,7 @@ func main() {
 							Placeholder: "Choose a video format...",
 							MaxValues:   1,
 							Disabled:    true,
-							Options: []discordgo.SelectMenuOption{
-								{
-									Label: "1920x1080 1080p (mp4, 1910kbps)",
-									Value: "1080p",
-								},
-								{
-									Label: "1280x720 720p (mp4, 700kbps)",
-									Value: "720p",
-								},
-								{
-									Label: "640x480 480p (mp4, 300kbps)",
-									Value: "480p",
-								},
-							},
+							Options:     videoMenuOptions,
 						},
 					},
 				},
@@ -221,16 +319,7 @@ func main() {
 							Placeholder: "Choose an audio format...",
 							MaxValues:   1,
 							Disabled:    false,
-							Options: []discordgo.SelectMenuOption{
-								{
-									Label: "Medium",
-									Value: "medium",
-								},
-								{
-									Label: "Low",
-									Value: "low",
-								},
-							},
+							Options:     audioMenuOptions,
 						},
 					},
 				},
@@ -285,21 +374,25 @@ func main() {
 
 			// Get selected audio format
 			selectedValues := i.MessageComponentData().Values
-			audioFormat := "medium" // default
+			audioFormatID := ""
 			if len(selectedValues) > 0 {
-				audioFormat = selectedValues[0]
+				audioFormatID = selectedValues[0]
 			}
 
+			// Store selected audio format ID
+			state.AudioFormatID = audioFormatID
+
 			response := ""
 			if state.URL != "" {
 				// Respond immediately to prevent timeout
-				response = "🚀 Starting download...\nURL: " + state.URL + "\nAudio: " + audioFormat + "\n\nYou'll receive an update when the download completes!"
+				response = fmt.Sprintf("🚀 Starting download...\nURL: %s\nVideo: %s\nAudio: %s\n\nYou'll receive an update when the download completes!",
+					state.URL, state.VideoFormatID, state.AudioFormatID)
 
 				// Start async download after responding
 				go func() {
 					// Small delay to ensure response is sent first
 					time.Sleep(100 * time.Millisecond)
-					startAsyncDownload(s, i, state.URL, audioFormat, out_dir)
+					startAsyncDownload(s, i, state.URL, state.VideoFormatID, state.AudioFormatID, out_dir)
 				}()
 
 				// Clean up state after starting download
@@ -342,36 +435,144 @@ func main() {
 				return
 			}
 
-			// Store URL in interaction state (we'll use the response message ID later)
-			// For now, store with the current token, then update after getting message ID
-			setInteractionState(i.Interaction.Token, &InteractionState{URL: url})
-
+			// Send initial "fetching formats" response
 			err := s.InteractionRespond(i.Interaction, &discordgo.InteractionResponse{
 				Type: discordgo.InteractionResponseChannelMessageWithSource,
 				Data: &discordgo.InteractionResponseData{
-					Content: "Select a video format:",
+					Content: "🔍 Fetching available formats...",
 					Flags:   discordgo.MessageFlagsEphemeral,
-					Components: []discordgo.MessageComponent{
+				},
+			})
+			if err != nil {
+				log.Printf("Error: %v", err)
+				return
+			}
+
+			// Fetch formats asynchronously
+			go func() {
+				formatOptions, err := GetFormats(url)
+				if err != nil {
+					_, err = s.InteractionResponseEdit(i.Interaction, &discordgo.WebhookEdit{
+						Content: ptr("❌ Error fetching formats: " + err.Error()),
+					})
+					if err != nil {
+						log.Printf("Error updating interaction: %v", err)
+					}
+					return
+				}
+
+				// Sort video formats: highest resolution first, then by bitrate
+				sort.Slice(formatOptions.VideoOptions, func(i, j int) bool {
+					// Compare by height (descending)
+					heightI := 0
+					if formatOptions.VideoOptions[i].Height != nil {
+						heightI = *formatOptions.VideoOptions[i].Height
+					}
+					heightJ := 0
+					if formatOptions.VideoOptions[j].Height != nil {
+						heightJ = *formatOptions.VideoOptions[j].Height
+					}
+
+					if heightI != heightJ {
+						return heightI > heightJ
+					}
+
+					// If heights are equal, compare by TBR (descending)
+					tbrI := 0.0
+					if formatOptions.VideoOptions[i].TBR != nil {
+						tbrI = *formatOptions.VideoOptions[i].TBR
+					}
+					tbrJ := 0.0
+					if formatOptions.VideoOptions[j].TBR != nil {
+						tbrJ = *formatOptions.VideoOptions[j].TBR
+					}
+
+					return tbrI > tbrJ
+				})
+
+				// Sort audio formats: highest bitrate first
+				sort.Slice(formatOptions.AudioOptions, func(i, j int) bool {
+					tbrI := 0.0
+					if formatOptions.AudioOptions[i].TBR != nil {
+						tbrI = *formatOptions.AudioOptions[i].TBR
+					}
+					tbrJ := 0.0
+					if formatOptions.AudioOptions[j].TBR != nil {
+						tbrJ = *formatOptions.AudioOptions[j].TBR
+					}
+
+					return tbrI > tbrJ
+				})
+
+				// Build video format options for Discord select menu
+				videoMenuOptions := []discordgo.SelectMenuOption{}
+				for _, vOpt := range formatOptions.VideoOptions {
+					label := fmt.Sprintf("%s (%s", vOpt.Resolution, vOpt.Ext)
+					if vOpt.TBR != nil {
+						label += fmt.Sprintf(", %.0fkbps", *vOpt.TBR)
+					}
+					label += ")"
+
+					// Discord has a 100 char limit on labels
+					if len(label) > 100 {
+						label = label[:97] + "..."
+					}
+
+					videoMenuOptions = append(videoMenuOptions, discordgo.SelectMenuOption{
+						Label: label,
+						Value: vOpt.FormatID,
+					})
+
+					// Discord has a limit of 25 options per select menu
+					if len(videoMenuOptions) >= 25 {
+						break
+					}
+				}
+
+				// Build audio format options for Discord select menu
+				audioMenuOptions := []discordgo.SelectMenuOption{}
+				for _, aOpt := range formatOptions.AudioOptions {
+					label := aOpt.Format
+					if aOpt.Language != nil {
+						label += fmt.Sprintf(" [%s]", *aOpt.Language)
+					}
+					if aOpt.TBR != nil {
+						label += fmt.Sprintf(" (%.0fkbps)", *aOpt.TBR)
+					}
+
+					// Discord has a 100 char limit on labels
+					if len(label) > 100 {
+						label = label[:97] + "..."
+					}
+
+					audioMenuOptions = append(audioMenuOptions, discordgo.SelectMenuOption{
+						Label: label,
+						Value: aOpt.FormatID,
+					})
+
+					// Discord has a limit of 25 options per select menu
+					if len(audioMenuOptions) >= 25 {
+						break
+					}
+				}
+
+				// Store format options in interaction state
+				setInteractionState(i.Interaction.Token, &InteractionState{
+					URL:           url,
+					FormatOptions: formatOptions,
+				})
+
+				// Update message with format selection menus
+				_, err = s.InteractionResponseEdit(i.Interaction, &discordgo.WebhookEdit{
+					Content: ptr("Select a video format:"),
+					Components: &[]discordgo.MessageComponent{
 						discordgo.ActionsRow{
 							Components: []discordgo.MessageComponent{
 								discordgo.SelectMenu{
 									CustomID:    "video_select",
 									Placeholder: "Choose a video format...",
 									MaxValues:   1,
-									Options: []discordgo.SelectMenuOption{
-										{
-											Label: "1920x1080 1080p (mp4, 1910kbps)",
-											Value: "1080p",
-										},
-										{
-											Label: "1280x720 720p (mp4, 700kbps)",
-											Value: "720p",
-										},
-										{
-											Label: "640x480 480p (mp4, 300kbps)",
-											Value: "480p",
-										},
-									},
+									Options:     videoMenuOptions,
 								},
 							},
 						},
@@ -382,25 +583,16 @@ func main() {
 									Placeholder: "Choose an audio format...",
 									MaxValues:   1,
 									Disabled:    true,
-									Options: []discordgo.SelectMenuOption{
-										{
-											Label: "Medium",
-											Value: "medium",
-										},
-										{
-											Label: "Low",
-											Value: "low",
-										},
-									},
-								},
+									Options:     audioMenuOptions,
 								},
 							},
 						},
 					},
 				})
 				if err != nil {
-				log.Printf("Error: %v", err)
+					log.Printf("Error updating interaction: %v", err)
 				}
+			}()
 		},
 	}
 

app/ytdlp.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"context"
+	"encoding/json"
 	"time"
 
 	"github.com/lrstanley/go-ytdlp"
@@ -10,6 +11,29 @@ import (
 type DownloadOptions struct {
 	EmbedThumbnail   bool
 	IncludeSubtitles bool
+	VideoFormatID    string
+	AudioFormatID    string
+}
+
+type VideoOption struct {
+	Height     *int     `json:"height,omitempty"`
+	Resolution string   `json:"resolution,omitempty"`
+	FormatID   string   `json:"format_id"`
+	Ext        string   `json:"ext"`
+	TBR        *float64 `json:"tbr,omitempty"`
+}
+
+type AudioOption struct {
+	Format   string   `json:"format"`
+	FormatID string   `json:"format_id"`
+	Ext      string   `json:"ext"`
+	TBR      *float64 `json:"tbr,omitempty"`
+	Language *string  `json:"language,omitempty"`
+}
+
+type FormatOptions struct {
+	VideoOptions []VideoOption `json:"video_options"`
+	AudioOptions []AudioOption `json:"audio_options"`
 }
 
 type ProgressUpdate struct {
@@ -20,6 +44,89 @@ type ProgressUpdate struct {
 	Phase    string
 }
 
+func GetFormats(url string) (*FormatOptions, error) {
+	dl := ytdlp.New().
+		SkipDownload().
+		DumpJSON()
+
+	result, err := dl.Run(context.TODO(), url)
+	if err != nil {
+		return nil, err
+	}
+
+	// Parse the JSON output
+	var info struct {
+		Formats []struct {
+			VCodec       *string  `json:"vcodec"`
+			ACodec       *string  `json:"acodec"`
+			NeedsTesting *bool    `json:"__needs_testing"`
+			Height       *int     `json:"height"`
+			Resolution   string   `json:"resolution"`
+			FormatID     string   `json:"format_id"`
+			Format       string   `json:"format"`
+			Ext          string   `json:"ext"`
+			TBR          *float64 `json:"tbr"`
+			Language     *string  `json:"language"`
+			LanguagePref *int     `json:"language_preference"`
+			URL          *string  `json:"url"`
+			Protocol     *string  `json:"protocol"`
+		} `json:"formats"`
+	}
+
+	if err := json.Unmarshal([]byte(result.Stdout), &info); err != nil {
+		return nil, err
+	}
+
+	formatOpts := &FormatOptions{
+		VideoOptions: []VideoOption{},
+		AudioOptions: []AudioOption{},
+	}
+
+	for _, fmt := range info.Formats {
+		// Skip formats that need testing
+		if fmt.NeedsTesting != nil && *fmt.NeedsTesting {
+			continue
+		}
+
+		// Skip SABR formats (https://github.com/yt-dlp/yt-dlp/issues/12482)
+		if fmt.URL == nil || *fmt.URL == "" {
+			continue
+		}
+
+		// Video-only: has video codec but no audio codec
+		if fmt.VCodec != nil && *fmt.VCodec != "none" &&
+			fmt.ACodec != nil && *fmt.ACodec == "none" {
+			formatOpts.VideoOptions = append(formatOpts.VideoOptions, VideoOption{
+				Height:     fmt.Height,
+				Resolution: fmt.Resolution,
+				FormatID:   fmt.FormatID,
+				Ext:        fmt.Ext,
+				TBR:        fmt.TBR,
+			})
+		}
+
+		// Audio-only: has audio codec but no video codec
+		if fmt.ACodec != nil && *fmt.ACodec != "none" &&
+			fmt.VCodec != nil && *fmt.VCodec == "none" {
+			audioOpt := AudioOption{
+				Format:   fmt.Format,
+				FormatID: fmt.FormatID,
+				Ext:      fmt.Ext,
+				TBR:      fmt.TBR,
+			}
+
+			// Use language if available, otherwise use language_preference
+			if fmt.Language != nil {
+				audioOpt.Language = fmt.Language
+			}
+
+			formatOpts.AudioOptions = append(formatOpts.AudioOptions, audioOpt)
+		}
+	}
+
+	return formatOpts, nil
+}
+
 func downloadVideo(out_dir, url string, opts DownloadOptions, progressChan chan<- ProgressUpdate) {
 	defer close(progressChan)
 
@@ -27,7 +134,6 @@ func downloadVideo(out_dir, url string, opts DownloadOptions, progressChan chan<
 
 	dl := ytdlp.New().
 		SetWorkDir(out_dir).
-		FormatSort("res,ext:mp4:m4a").
 		RecodeVideo("mp4").
 		ProgressFunc(100*time.Millisecond, func(prog ytdlp.ProgressUpdate) {
 			// Detect phase transition -- differentiate "downloading" as the main download
@@ -54,6 +160,18 @@ func downloadVideo(out_dir, url string, opts DownloadOptions, progressChan chan<
 		}).
 		Output("%(title)s.%(ext)s")
 
+	// Set format if both video and audio format IDs are provided
+	if opts.VideoFormatID != "" && opts.AudioFormatID != "" {
+		dl = dl.Format(opts.VideoFormatID + "+" + opts.AudioFormatID)
+	} else if opts.VideoFormatID != "" {
+		dl = dl.Format(opts.VideoFormatID)
+	} else if opts.AudioFormatID != "" {
+		dl = dl.Format(opts.AudioFormatID)
+	} else {
+		// Default format selection if none specified
+		dl = dl.FormatSort("res,ext:mp4:m4a")
+	}
+
 	if opts.EmbedThumbnail {
 		dl = dl.EmbedThumbnail()
 	}

flake.lock

@@ -2,11 +2,11 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1768875095,
-        "narHash": "sha256-dYP3DjiL7oIiiq3H65tGIXXIT1Waiadmv93JS0sS+8A=",
+        "lastModified": 1770537093,
+        "narHash": "sha256-pF1quXG5wsgtyuPOHcLfYg/ft/QMr8NnX0i6tW2187s=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "ed142ab1b3a092c4d149245d0c4126a5d7ea00b0",
+        "rev": "fef9403a3e4d31b0a23f0bacebbec52c248fbb51",
         "type": "github"
       },
       "original": {