render manifest ffmpeg progress like standard download bars

internal/download/downloader.go

@@ -343,8 +343,9 @@ func (d *Downloader) streamManifestWithFFmpeg(ctx context.Context, sourceURL, ou
 			decor.Name(desc+" ", decor.WC{W: 56, C: decor.DSyncWidth | decor.DindentRight}),
 		),
 		mpb.AppendDecorators(
+			decor.CurrentKibiByte("% .1f", decor.WCSyncWidthR),
+			decor.Name(" | ", decor.WCSyncWidth),
 			decor.Elapsed(decor.ET_STYLE_GO, decor.WCSyncWidthR),
-			decor.Name(" | probing stream", decor.WCSyncWidth),
 		),
 		mpb.BarRemoveOnComplete(),
 	)
@@ -364,18 +365,21 @@ func (d *Downloader) streamManifestWithFFmpeg(ctx context.Context, sourceURL, ou
 	scanDone := make(chan scanState, 1)
 	go func() {
 		state := scanState{}
-		shownMS := int64(0)
-		newFFmpegBar := func(totalMS int64) *mpb.Bar {
+		shownBytes := int64(0)
+		barTotalBytes := int64(0)
+		newEstimatedBar := func(totalBytes int64) *mpb.Bar {
 			return d.progress.AddBar(
-				totalMS,
+				totalBytes,
 				mpb.PrependDecorators(
 					decor.Name(desc+" ", decor.WC{W: 56, C: decor.DSyncWidth | decor.DindentRight}),
 					decor.Percentage(decor.WCSyncWidthR),
 				),
 				mpb.AppendDecorators(
+					decor.CountersKibiByte("% .1f / % .1f", decor.WCSyncWidthR),
 					decor.Name(" | ", decor.WCSyncWidth),
-					decor.Elapsed(decor.ET_STYLE_GO, decor.WCSyncWidthR),
-					decor.Name(" | ffmpeg stream", decor.WCSyncWidth),
+					decor.AverageSpeed(decor.SizeB1024(0), "% .1f", decor.WCSyncWidthR),
+					decor.Name(" | ETA ", decor.WCSyncWidth),
+					decor.AverageETA(decor.ET_STYLE_GO, decor.WCSyncWidthR),
 				),
 				mpb.BarRemoveOnComplete(),
 			)
@@ -389,45 +393,65 @@ func (d *Downloader) streamManifestWithFFmpeg(ctx context.Context, sourceURL, ou
 				ffOut.WriteString(line)
 				ffOut.WriteByte('\n')
 			}
-			if state.totalMS == 0 {
 			if totalMS, ok := parseFFmpegDurationLine(line); ok && totalMS > 0 {
 				state.totalMS = totalMS
-					spinner.SetTotal(-1, true)
-					bar = newFFmpegBar(state.totalMS)
-					if state.currentMS > state.totalMS {
-						state.currentMS = state.totalMS
 			}
-					if state.currentMS > shownMS {
-						bar.IncrBy(int(state.currentMS - shownMS))
-						shownMS = state.currentMS
+			if bitrateBPS, ok := parseFFmpegDurationBitrateBPS(line); ok && bitrateBPS > 0 {
+				state.bitrateBPS = bitrateBPS
 			}
+			if bitrateBPS, ok := parseFFmpegProgressBitrateBPS(line); ok && bitrateBPS > 0 {
+				state.bitrateBPS = bitrateBPS
 			}
+			if totalSize, ok := parseFFmpegTotalSize(line); ok && totalSize > state.currentBytes {
+				state.currentBytes = totalSize
 			}
 			if currentMS, ok := parseFFmpegOutTime(line); ok {
 				if currentMS > state.currentMS {
 					state.currentMS = currentMS
 				}
+			}
+
+			if bar == nil {
+				estimatedTotal := int64(0)
+				if state.totalMS > 0 && state.bitrateBPS > 0 {
+					estimatedTotal = estimateTotalBytesFromBitrate(state.totalMS, state.bitrateBPS)
+				}
+				if estimatedTotal == 0 {
+					estimatedTotal = estimateTotalBytesFromProgress(state.totalMS, state.currentMS, state.currentBytes)
+				}
+				if estimatedTotal > 0 {
+					if estimatedTotal < state.currentBytes {
+						estimatedTotal = state.currentBytes
+					}
+					barTotalBytes = estimatedTotal
+					spinner.SetTotal(-1, true)
+					bar = newEstimatedBar(barTotalBytes)
+				}
+			}
+
+			if state.currentBytes > shownBytes {
+				delta := state.currentBytes - shownBytes
 				if bar != nil {
-					targetMS := state.currentMS
-					if targetMS > state.totalMS {
-						targetMS = state.totalMS
-					}
-					if targetMS > shownMS {
-						bar.IncrBy(int(targetMS - shownMS))
-						shownMS = targetMS
+					bar.IncrBy(int(delta))
+					if state.currentBytes > barTotalBytes {
+						barTotalBytes = state.currentBytes
+						bar.SetTotal(barTotalBytes, false)
 					}
+				} else {
+					spinner.IncrBy(int(delta))
 				}
+				shownBytes = state.currentBytes
 			}
 		}
 		if bar != nil {
-			if shownMS < state.totalMS {
-				bar.IncrBy(int(state.totalMS - shownMS))
+			if shownBytes < barTotalBytes {
+				bar.IncrBy(int(barTotalBytes - shownBytes))
 			}
-			bar.SetTotal(state.totalMS, true)
+			bar.SetTotal(barTotalBytes, true)
 		} else {
 			spinner.SetTotal(-1, true)
 		}
-		state.currentMS = shownMS
+		state.currentBytes = shownBytes
 		state.scanErr = scanner.Err()
 		scanDone <- state
 	}()
@@ -469,6 +493,8 @@ func buildFFmpegStreamArgs(sourceURL, outputPath string, includeVideo bool) []st
 type scanState struct {
 	totalMS      int64
 	currentMS    int64
+	bitrateBPS   int64
+	currentBytes int64
 	scanErr      error
 }
 
@@ -513,6 +539,118 @@ func parseFFmpegOutTime(line string) (int64, bool) {
 	return parseClockDurationMS(raw)
 }
 
+func parseFFmpegTotalSize(line string) (int64, bool) {
+	if !strings.HasPrefix(line, "total_size=") {
+		return 0, false
+	}
+	raw := strings.TrimSpace(strings.TrimPrefix(line, "total_size="))
+	if raw == "" || strings.EqualFold(raw, "N/A") {
+		return 0, false
+	}
+	v, err := strconv.ParseInt(raw, 10, 64)
+	if err != nil || v < 0 {
+		return 0, false
+	}
+	return v, true
+}
+
+func parseFFmpegDurationBitrateBPS(line string) (int64, bool) {
+	idx := strings.Index(strings.ToLower(line), "bitrate:")
+	if idx < 0 {
+		return 0, false
+	}
+	raw := strings.TrimSpace(line[idx+len("bitrate:"):])
+	if raw == "" {
+		return 0, false
+	}
+	return parseFFmpegBitrateBPS(raw)
+}
+
+func parseFFmpegProgressBitrateBPS(line string) (int64, bool) {
+	if !strings.HasPrefix(line, "bitrate=") {
+		return 0, false
+	}
+	raw := strings.TrimSpace(strings.TrimPrefix(line, "bitrate="))
+	if raw == "" || strings.EqualFold(raw, "N/A") {
+		return 0, false
+	}
+	return parseFFmpegBitrateBPS(raw)
+}
+
+func parseFFmpegBitrateBPS(raw string) (int64, bool) {
+	raw = strings.TrimSpace(raw)
+	if raw == "" || strings.EqualFold(raw, "N/A") {
+		return 0, false
+	}
+	parts := strings.Fields(strings.ToLower(raw))
+	if len(parts) == 0 {
+		return 0, false
+	}
+	numStr := parts[0]
+	unit := ""
+	if len(parts) > 1 {
+		unit = parts[1]
+	} else {
+		i := 0
+		for i < len(numStr) {
+			c := numStr[i]
+			if (c >= '0' && c <= '9') || c == '.' {
+				i++
+				continue
+			}
+			break
+		}
+		if i < len(numStr) {
+			unit = numStr[i:]
+			numStr = numStr[:i]
+		}
+	}
+	num, err := strconv.ParseFloat(strings.TrimSpace(numStr), 64)
+	if err != nil || num <= 0 {
+		return 0, false
+	}
+	unit = strings.TrimSpace(strings.Trim(unit, ","))
+	mult := float64(1)
+	switch unit {
+	case "kb/s", "kbits/s", "kbit/s", "kbps":
+		mult = 1000
+	case "mb/s", "mbits/s", "mbit/s", "mbps":
+		mult = 1000 * 1000
+	case "gb/s", "gbits/s", "gbit/s", "gbps":
+		mult = 1000 * 1000 * 1000
+	case "b/s", "bit/s", "bits/s", "":
+		mult = 1
+	default:
+		return 0, false
+	}
+	bps := int64(num * mult)
+	if bps <= 0 {
+		return 0, false
+	}
+	return bps, true
+}
+
+func estimateTotalBytesFromBitrate(totalMS, bitrateBPS int64) int64 {
+	if totalMS <= 0 || bitrateBPS <= 0 {
+		return 0
+	}
+	return (totalMS * bitrateBPS) / 8000
+}
+
+func estimateTotalBytesFromProgress(totalMS, currentMS, currentBytes int64) int64 {
+	if totalMS <= 0 || currentMS <= 0 || currentBytes <= 0 {
+		return 0
+	}
+	if currentMS > totalMS {
+		currentMS = totalMS
+	}
+	est := (currentBytes * totalMS) / currentMS
+	if est < currentBytes {
+		est = currentBytes
+	}
+	return est
+}
+
 func parseClockDurationMS(raw string) (int64, bool) {
 	parts := strings.Split(strings.TrimSpace(raw), ":")
 	if len(parts) != 3 {

internal/download/downloader_test.go

@@ -74,7 +74,6 @@ func TestDeezerBlowfishKeyDerivation(t *testing.T) {
 	}
 }
 
-
 func TestFileDeezerEncrypted(t *testing.T) {
 	trackID := "3135556"
 	plain := make([]byte, deezerBFChunkSize+777)
@@ -221,6 +220,36 @@ func TestParseFFmpegDurationLine(t *testing.T) {
 	}
 }
 
+func TestParseFFmpegDurationBitrateBPS(t *testing.T) {
+	bps, ok := parseFFmpegDurationBitrateBPS("  Duration: 00:04:52.57, start: 0.000000, bitrate: 975 kb/s")
+	if !ok {
+		t.Fatalf("expected bitrate parse to succeed")
+	}
+	if want := int64(975000); bps != want {
+		t.Fatalf("unexpected bitrate: got=%d want=%d", bps, want)
+	}
+}
+
+func TestParseFFmpegProgressBitrateBPS(t *testing.T) {
+	bps, ok := parseFFmpegProgressBitrateBPS("bitrate=1706.8kbits/s")
+	if !ok {
+		t.Fatalf("expected progress bitrate parse to succeed")
+	}
+	if want := int64(1706800); bps != want {
+		t.Fatalf("unexpected bitrate: got=%d want=%d", bps, want)
+	}
+}
+
+func TestParseFFmpegTotalSize(t *testing.T) {
+	size, ok := parseFFmpegTotalSize("total_size=1234567")
+	if !ok {
+		t.Fatalf("expected total_size parse to succeed")
+	}
+	if want := int64(1234567); size != want {
+		t.Fatalf("unexpected total_size: got=%d want=%d", size, want)
+	}
+}
+
 func TestParseFFmpegOutTime(t *testing.T) {
 	currentMS, ok := parseFFmpegOutTime("out_time=00:01:02.340000")
 	if !ok {
@@ -240,6 +269,20 @@ func TestParseClockDurationMSInvalid(t *testing.T) {
 	}
 }
 
+func TestEstimateTotalBytesFromBitrate(t *testing.T) {
+	total := estimateTotalBytesFromBitrate(10000, 1600000)
+	if want := int64(2000000); total != want {
+		t.Fatalf("unexpected estimate from bitrate: got=%d want=%d", total, want)
+	}
+}
+
+func TestEstimateTotalBytesFromProgress(t *testing.T) {
+	total := estimateTotalBytesFromProgress(10000, 2500, 500000)
+	if want := int64(2000000); total != want {
+		t.Fatalf("unexpected estimate from progress: got=%d want=%d", total, want)
+	}
+}
+
 func TestBuildFFmpegStreamArgsAudioOnly(t *testing.T) {
 	args := buildFFmpegStreamArgs("https://example.com/master.m3u8", "/tmp/out.m4a", false)
 	if !containsArgPair(args, "-map", "0:a:0") {