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feat: convert on exit

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0x1d
2025-11-18 11:03:05 +01:00
parent 3f46bcc1bd
commit 0c0b39728c
4 changed files with 476 additions and 19 deletions
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6
README.md
View File

@@ -13,10 +13,10 @@ This installs the `sdl` binary into your `GOBIN` (defaults to `~/go/bin`). Ensur
## Usage ## Usage
```bash ```bash
sdl https://example.com/path/to/playlist.m3u8 sdl https://example.com/page-with-video
``` ```
The downloader automatically picks the highest-bandwidth variant when given a master playlist, downloads the segments, and transmuxes them into an `.mp4` container. You can override the output filename: If the target URL is a webpage, `sdl` scans it for embedded HLS playlists (`.m3u8`) and downloads each one it finds. You can override the output filename (or prefix when multiple videos exist):
```bash ```bash
sdl -o myvideo.mp4 https://example.com/path/to/playlist.m3u8 sdl -o myvideo.mp4 https://example.com/path/to/playlist.m3u8
@@ -25,6 +25,7 @@ sdl -o myvideo.mp4 https://example.com/path/to/playlist.m3u8
## Features ## Features
- Follows HTTP redirects (up to 5 hops) - Follows HTTP redirects (up to 5 hops)
- Scrapes webpages for embedded HLS playlists (`<video>`, `<source>`, data attributes, script references)
- Supports HLS master playlists (auto-select highest bandwidth variant) - Supports HLS master playlists (auto-select highest bandwidth variant)
- Produces `.mp4` output via `ffmpeg` - Produces `.mp4` output via `ffmpeg`
- Respects basic HTTP timeouts (30 seconds per request) - Respects basic HTTP timeouts (30 seconds per request)
@@ -32,6 +33,7 @@ sdl -o myvideo.mp4 https://example.com/path/to/playlist.m3u8
## Limitations ## Limitations
- Requires `ffmpeg` in `PATH` for transmuxing - Requires `ffmpeg` in `PATH` for transmuxing
- Webpage scraping is best-effort; dynamic players that load playlists via JS APIs may not be detected
- No retry logic beyond standard HTTP redirects - No retry logic beyond standard HTTP redirects
## Development ## Development

3
go.mod
View File

@@ -3,8 +3,11 @@ module sdl
go 1.24.3 go 1.24.3
require ( require (
github.com/PuerkitoBio/goquery v1.10.3 // indirect
github.com/andybalholm/cascadia v1.3.3 // indirect
github.com/grafov/m3u8 v0.12.1 // indirect github.com/grafov/m3u8 v0.12.1 // indirect
github.com/inconshreveable/mousetrap v1.1.0 // indirect github.com/inconshreveable/mousetrap v1.1.0 // indirect
github.com/spf13/cobra v1.10.1 // indirect github.com/spf13/cobra v1.10.1 // indirect
github.com/spf13/pflag v1.0.9 // indirect github.com/spf13/pflag v1.0.9 // indirect
golang.org/x/net v0.39.0 // indirect
) )

71
go.sum
View File

@@ -1,4 +1,9 @@
github.com/PuerkitoBio/goquery v1.10.3 h1:pFYcNSqHxBD06Fpj/KsbStFRsgRATgnf3LeXiUkhzPo=
github.com/PuerkitoBio/goquery v1.10.3/go.mod h1:tMUX0zDMHXYlAQk6p35XxQMqMweEKB7iK7iLNd4RH4Y=
github.com/andybalholm/cascadia v1.3.3 h1:AG2YHrzJIm4BZ19iwJ/DAua6Btl3IwJX+VI4kktS1LM=
github.com/andybalholm/cascadia v1.3.3/go.mod h1:xNd9bqTn98Ln4DwST8/nG+H0yuB8Hmgu1YHNnWw0GeA=
github.com/cpuguy83/go-md2man/v2 v2.0.6/go.mod h1:oOW0eioCTA6cOiMLiUPZOpcVxMig6NIQQ7OS05n1F4g= github.com/cpuguy83/go-md2man/v2 v2.0.6/go.mod h1:oOW0eioCTA6cOiMLiUPZOpcVxMig6NIQQ7OS05n1F4g=
github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
github.com/grafov/m3u8 v0.12.1 h1:DuP1uA1kvRRmGNAZ0m+ObLv1dvrfNO0TPx0c/enNk0s= github.com/grafov/m3u8 v0.12.1 h1:DuP1uA1kvRRmGNAZ0m+ObLv1dvrfNO0TPx0c/enNk0s=
github.com/grafov/m3u8 v0.12.1/go.mod h1:nqzOkfBiZJENr52zTVd/Dcl03yzphIMbJqkXGu+u080= github.com/grafov/m3u8 v0.12.1/go.mod h1:nqzOkfBiZJENr52zTVd/Dcl03yzphIMbJqkXGu+u080=
github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8= github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
@@ -8,5 +13,71 @@ github.com/spf13/cobra v1.10.1 h1:lJeBwCfmrnXthfAupyUTzJ/J4Nc1RsHC/mSRU2dll/s=
github.com/spf13/cobra v1.10.1/go.mod h1:7SmJGaTHFVBY0jW4NXGluQoLvhqFQM+6XSKD+P4XaB0= github.com/spf13/cobra v1.10.1/go.mod h1:7SmJGaTHFVBY0jW4NXGluQoLvhqFQM+6XSKD+P4XaB0=
github.com/spf13/pflag v1.0.9 h1:9exaQaMOCwffKiiiYk6/BndUBv+iRViNW+4lEMi0PvY= github.com/spf13/pflag v1.0.9 h1:9exaQaMOCwffKiiiYk6/BndUBv+iRViNW+4lEMi0PvY=
github.com/spf13/pflag v1.0.9/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg= github.com/spf13/pflag v1.0.9/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
golang.org/x/crypto v0.13.0/go.mod h1:y6Z2r+Rw4iayiXXAIxJIDAJ1zMW4yaTpebo8fPOliYc=
golang.org/x/crypto v0.19.0/go.mod h1:Iy9bg/ha4yyC70EfRS8jz+B6ybOBKMaSxLj6P6oBDfU=
golang.org/x/crypto v0.23.0/go.mod h1:CKFgDieR+mRhux2Lsu27y0fO304Db0wZe70UKqHu0v8=
golang.org/x/crypto v0.31.0/go.mod h1:kDsLvtWBEx7MV9tJOj9bnXsPbxwJQ6csT/x4KIN4Ssk=
golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
golang.org/x/mod v0.12.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
golang.org/x/mod v0.15.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
golang.org/x/mod v0.17.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
golang.org/x/net v0.6.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
golang.org/x/net v0.10.0/go.mod h1:0qNGK6F8kojg2nk9dLZ2mShWaEBan6FAoqfSigmmuDg=
golang.org/x/net v0.15.0/go.mod h1:idbUs1IY1+zTqbi8yxTbhexhEEk5ur9LInksu6HrEpk=
golang.org/x/net v0.21.0/go.mod h1:bIjVDfnllIU7BJ2DNgfnXvpSvtn8VRwhlsaeUTyUS44=
golang.org/x/net v0.25.0/go.mod h1:JkAGAh7GEvH74S6FOH42FLoXpXbE/aqXSrIQjXgsiwM=
golang.org/x/net v0.33.0/go.mod h1:HXLR5J+9DxmrqMwG9qjGCxZ+zKXxBru04zlTvWlWuN4=
golang.org/x/net v0.39.0 h1:ZCu7HMWDxpXpaiKdhzIfaltL9Lp31x/3fCP11bc6/fY=
golang.org/x/net v0.39.0/go.mod h1:X7NRbYVEA+ewNkCNyJ513WmMdQ3BineSwVtN2zD/d+E=
golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.3.0/go.mod h1:FU7BRWz2tNW+3quACPkgCx/L+uEAv1htQ0V83Z9Rj+Y=
golang.org/x/sync v0.6.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
golang.org/x/sync v0.7.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
golang.org/x/sync v0.10.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.8.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.12.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
golang.org/x/sys v0.20.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
golang.org/x/sys v0.28.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
golang.org/x/telemetry v0.0.0-20240228155512-f48c80bd79b2/go.mod h1:TeRTkGYfJXctD9OcfyVLyj2J3IxLnKwHJR8f4D8a3YE=
golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
golang.org/x/term v0.8.0/go.mod h1:xPskH00ivmX89bAKVGSKKtLOWNx2+17Eiy94tnKShWo=
golang.org/x/term v0.12.0/go.mod h1:owVbMEjm3cBLCHdkQu9b1opXd4ETQWc3BhuQGKgXgvU=
golang.org/x/term v0.17.0/go.mod h1:lLRBjIVuehSbZlaOtGMbcMncT+aqLLLmKrsjNrUguwk=
golang.org/x/term v0.20.0/go.mod h1:8UkIAJTvZgivsXaD6/pH6U9ecQzZ45awqEOzuCvwpFY=
golang.org/x/term v0.27.0/go.mod h1:iMsnZpn0cago0GOrHO2+Y7u7JPn5AylBrcoWkElMTSM=
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
golang.org/x/text v0.9.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=
golang.org/x/text v0.13.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
golang.org/x/text v0.15.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
golang.org/x/text v0.21.0/go.mod h1:4IBbMaMmOPCJ8SecivzSH54+73PCFmPWxNTLm+vZkEQ=
golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
golang.org/x/tools v0.13.0/go.mod h1:HvlwmtVNQAhOuCjW7xxvovg8wbNq7LwfXh/k7wXUl58=
golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d/go.mod h1:aiJjzUbINMkxbQROHiO6hDPo2LHcIPhhQsa9DLh0yGk=
golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

415
internal/downloader/downloader.go
View File

@@ -13,22 +13,26 @@ import (
"os/exec" "os/exec"
"path" "path"
"path/filepath" "path/filepath"
"regexp"
"sort" "sort"
"strings" "strings"
"time" "time"
"github.com/PuerkitoBio/goquery"
"github.com/grafov/m3u8" "github.com/grafov/m3u8"
) )
const ( const (
defaultClientTimeout = 30 * time.Second defaultClientTimeout = 30 * time.Second
maxRedirects = 5 maxRedirects = 5
playlistPollInterval = 2 * time.Second // Poll interval for livestreams
) )
var ( var (
errInvalidPlaylist = errors.New("unsupported playlist type. expected media playlist") errInvalidPlaylist = errors.New("unsupported playlist type. expected media playlist")
errUnsupportedMaster = errors.New("master playlist contains no playable variants") errUnsupportedMaster = errors.New("master playlist contains no playable variants")
errFFmpegMissing = errors.New("ffmpeg is required on PATH to transmux segments") errFFmpegMissing = errors.New("ffmpeg is required on PATH to transmux segments")
errNoStreamsFound = errors.New("no HLS playlists found on page")
) )
type segmentInfo struct { type segmentInfo struct {
@@ -36,38 +40,121 @@ type segmentInfo struct {
URI string URI string
} }
// Download downloads the video stream referenced by the given URL into a file named outputName. // Download downloads the video stream(s) referenced by the given URL into files derived from outputName.
// If outputName is empty, the base name of the stream URL is used with an .mp4 extension. // If outputName is empty, a base name is inferred from the source URL.
func Download(ctx context.Context, streamURL, outputName string) error { func Download(ctx context.Context, sourceURL, outputName string) error {
if streamURL == "" { if sourceURL == "" {
return errors.New("stream URL must not be empty") return errors.New("stream URL must not be empty")
} }
parsed, err := url.Parse(streamURL) parsed, err := url.Parse(sourceURL)
if err != nil { if err != nil {
return fmt.Errorf("invalid URL: %w", err) return fmt.Errorf("invalid URL: %w", err)
} }
client := &http.Client{Timeout: defaultClientTimeout} client := &http.Client{Timeout: defaultClientTimeout}
playlistBody, finalURL, err := fetchWithRedirects(ctx, client, parsed, maxRedirects)
contentType, err := peekContentType(ctx, client, parsed)
if err != nil {
return fmt.Errorf("detect content type: %w", err)
}
if strings.Contains(contentType, "text/html") {
streams, err := extractPlaylistsFromHTML(ctx, client, parsed)
if err != nil {
return err
}
if len(streams) == 0 {
return errNoStreamsFound
}
for idx, stream := range streams {
name := outputName
if name == "" {
name = inferOutputNameMust(stream)
}
if len(streams) > 1 {
ext := filepath.Ext(name)
base := strings.TrimSuffix(name, ext)
if base == "" {
base = fmt.Sprintf("video-%d", idx+1)
}
name = base + fmt.Sprintf("-%02d", idx+1) + ext
}
if err := Download(ctx, stream, name); err != nil {
return err
}
}
return nil
}
// For livestreams, set up keyboard input handler for "q" key
// Check if this might be a livestream by creating a cancellable context
playlistCtx, cancel := context.WithCancel(ctx)
defer cancel()
// Start keyboard input handler in a goroutine
// This will work for both livestreams and VOD, but only matters for livestreams
go watchForQuitKey(cancel)
return downloadPlaylist(playlistCtx, client, parsed, outputName)
}
// watchForQuitKey watches for "q" keypress and cancels the context
func watchForQuitKey(cancel context.CancelFunc) {
// Check if stdin is a terminal
if !isTerminal(os.Stdin) {
return // Not a terminal, skip keyboard input
}
// Print instruction once
fmt.Fprintf(os.Stderr, "Press 'q' and Enter to stop downloading and convert to MP4\n")
reader := bufio.NewReader(os.Stdin)
for {
line, err := reader.ReadString('\n')
if err != nil {
// EOF or error, stop watching
return
}
// Check if line starts with 'q' or 'Q' (allows "q" or "q\n" or "quit\n", etc.)
line = strings.TrimSpace(line)
if len(line) > 0 && (line[0] == 'q' || line[0] == 'Q') {
fmt.Fprintf(os.Stderr, "\nStopping download and converting to MP4...\n")
cancel()
return
}
}
}
// isTerminal checks if the file descriptor is a terminal
func isTerminal(f *os.File) bool {
stat, err := f.Stat()
if err != nil {
return false
}
return (stat.Mode() & os.ModeCharDevice) != 0
}
func downloadPlaylist(ctx context.Context, client *http.Client, parsed *url.URL, outputName string) error {
body, finalURL, err := fetchWithRedirects(ctx, client, parsed, maxRedirects)
if err != nil { if err != nil {
return fmt.Errorf("fetch playlist: %w", err) return fmt.Errorf("fetch playlist: %w", err)
} }
defer playlistBody.Close() defer body.Close()
playlist, listType, err := m3u8.DecodeFrom(bufio.NewReader(playlistBody), true) playlist, listType, err := m3u8.DecodeFrom(bufio.NewReader(body), true)
if err != nil { if err != nil {
return fmt.Errorf("parse playlist: %w", err) return fmt.Errorf("parse playlist: %w", err)
} }
var segments []segmentInfo var mediaPlaylist *m3u8.MediaPlaylist
switch listType { switch listType {
case m3u8.MEDIA: case m3u8.MEDIA:
mediaPlaylist, ok := playlist.(*m3u8.MediaPlaylist) mp, ok := playlist.(*m3u8.MediaPlaylist)
if !ok { if !ok {
return errInvalidPlaylist return errInvalidPlaylist
} }
segments = collectSegments(mediaPlaylist) mediaPlaylist = mp
case m3u8.MASTER: case m3u8.MASTER:
masterPlaylist, ok := playlist.(*m3u8.MasterPlaylist) masterPlaylist, ok := playlist.(*m3u8.MasterPlaylist)
if !ok { if !ok {
@@ -82,23 +169,42 @@ func Download(ctx context.Context, streamURL, outputName string) error {
return errInvalidPlaylist return errInvalidPlaylist
} }
if len(segments) == 0 { if len(mediaPlaylist.Segments) == 0 {
return errors.New("playlist contains no segments") return errors.New("playlist contains no segments")
} }
if outputName == "" { name := outputName
outputName = inferOutputName(finalURL) if name == "" {
name = inferOutputName(finalURL)
} }
// Check if this is a livestream (playlist is not closed)
isLiveStream := !mediaPlaylist.Closed
if isLiveStream {
// For livestreams, write to a permanent .ts file
tsName := ensureTSExtension(name)
tsFile, err := os.Create(tsName)
if err != nil {
return fmt.Errorf("create output file: %w", err)
}
// downloadLiveStream handles file closing
// Note: keyboard input handler is already set up in Download()
return downloadLiveStream(ctx, client, finalURL, mediaPlaylist, tsFile, name)
}
// For VOD (Video on Demand), use temp file and convert to MP4
tempTS, err := os.CreateTemp("", "sdl-*.ts") tempTS, err := os.CreateTemp("", "sdl-*.ts")
if err != nil { if err != nil {
return fmt.Errorf("create temp file: %w", err) return fmt.Errorf("create temp file: %w", err)
} }
tempPath := tempTS.Name()
defer func() { defer func() {
tempTS.Close() tempTS.Close()
os.Remove(tempTS.Name()) os.Remove(tempPath)
}() }()
segments := collectSegments(mediaPlaylist)
for i, segment := range segments { for i, segment := range segments {
if err := downloadSegment(ctx, client, finalURL, segment, tempTS); err != nil { if err := downloadSegment(ctx, client, finalURL, segment, tempTS); err != nil {
return fmt.Errorf("download segment %d: %w", i, err) return fmt.Errorf("download segment %d: %w", i, err)
@@ -109,14 +215,268 @@ func Download(ctx context.Context, streamURL, outputName string) error {
return fmt.Errorf("rewind temp file: %w", err) return fmt.Errorf("rewind temp file: %w", err)
} }
mp4Name := ensureMP4Extension(outputName) mp4Name := ensureMP4Extension(name)
if err := transmuxToMP4(ctx, tempTS.Name(), mp4Name); err != nil { if err := transmuxToMP4(ctx, tempPath, mp4Name); err != nil {
return err return err
} }
return nil return nil
} }
func downloadLiveStream(ctx context.Context, client *http.Client, playlistURL *url.URL, initialPlaylist *m3u8.MediaPlaylist, output *os.File, outputName string) error {
// Track downloaded segments by sequence number
downloadedSeqs := make(map[uint64]bool)
tsPath := output.Name()
// Download initial segments
initialSegments := collectSegments(initialPlaylist)
for _, segment := range initialSegments {
if err := downloadSegment(ctx, client, playlistURL, segment, output); err != nil {
return fmt.Errorf("download initial segment %d: %w", segment.Sequence, err)
}
// Sync after each segment to ensure data is written to disk
if err := output.Sync(); err != nil {
return fmt.Errorf("sync file after segment %d: %w", segment.Sequence, err)
}
downloadedSeqs[segment.Sequence] = true
}
// Continuously poll for new segments
ticker := time.NewTicker(playlistPollInterval)
defer ticker.Stop()
for {
select {
case <-ctx.Done():
// Context cancelled (Ctrl+C or "q" key) - finalize and convert
return finalizeAndConvert(output, tsPath, outputName)
case <-ticker.C:
// Fetch updated playlist
body, _, err := fetchWithRedirects(ctx, client, playlistURL, maxRedirects)
if err != nil {
// If we can't fetch the playlist, continue trying
continue
}
playlist, listType, err := m3u8.DecodeFrom(bufio.NewReader(body), true)
body.Close()
if err != nil {
continue
}
if listType != m3u8.MEDIA {
continue
}
mediaPlaylist, ok := playlist.(*m3u8.MediaPlaylist)
if !ok {
continue
}
// Check if stream has ended
if mediaPlaylist.Closed {
// Download any remaining segments
segments := collectSegments(mediaPlaylist)
for _, segment := range segments {
if !downloadedSeqs[segment.Sequence] {
if err := downloadSegment(ctx, client, playlistURL, segment, output); err != nil {
// Log error but continue with finalization
continue
}
// Sync after each segment
if err := output.Sync(); err != nil {
continue
}
downloadedSeqs[segment.Sequence] = true
}
}
// Stream ended - finalize and convert
return finalizeAndConvert(output, tsPath, outputName)
}
// Download new segments
segments := collectSegments(mediaPlaylist)
for _, segment := range segments {
if !downloadedSeqs[segment.Sequence] {
if err := downloadSegment(ctx, client, playlistURL, segment, output); err != nil {
// Log error but continue polling
continue
}
// Sync after each segment to ensure data is written to disk
if err := output.Sync(); err != nil {
// Log error but continue
continue
}
downloadedSeqs[segment.Sequence] = true
}
}
}
}
}
func finalizeOutput(ctx context.Context, tempPath, outputName string) error {
mp4Name := ensureMP4Extension(outputName)
if err := transmuxToMP4(ctx, tempPath, mp4Name); err != nil {
return err
}
// Clean up temp file after successful transmux
os.Remove(tempPath)
return nil
}
func finalizeAndConvert(output *os.File, tsPath, outputName string) error {
// Sync and close the file before conversion
output.Sync() // Flush any pending writes
output.Close()
// Convert to MP4
fmt.Fprintf(os.Stderr, "Converting to MP4...\n")
if err := convertTSToMP4(context.Background(), tsPath, outputName); err != nil {
// Don't fail if conversion fails - the .ts file is still valid
fmt.Fprintf(os.Stderr, "Warning: MP4 conversion failed, but .ts file is saved: %v\n", err)
return nil
}
mp4Name := ensureMP4Extension(outputName)
fmt.Fprintf(os.Stderr, "Conversion complete: %s\n", mp4Name)
return nil
}
func convertTSToMP4(ctx context.Context, tsPath, outputName string) error {
// Only convert if ffmpeg is available, but don't fail if it's not
if _, err := exec.LookPath("ffmpeg"); err != nil {
return fmt.Errorf("ffmpeg not found in PATH")
}
mp4Name := ensureMP4Extension(outputName)
// Use background context for conversion to ensure it completes even if main context is cancelled
if err := transmuxToMP4(ctx, tsPath, mp4Name); err != nil {
return err
}
return nil
}
func peekContentType(ctx context.Context, client *http.Client, target *url.URL) (string, error) {
req, err := http.NewRequestWithContext(ctx, http.MethodHead, target.String(), nil)
if err != nil {
return "", fmt.Errorf("create HEAD request: %w", err)
}
resp, err := client.Do(req)
if err != nil {
return "", fmt.Errorf("head request: %w", err)
}
defer resp.Body.Close()
if resp.StatusCode >= 400 {
return "", fmt.Errorf("head status %s", resp.Status)
}
return resp.Header.Get("Content-Type"), nil
}
func extractPlaylistsFromHTML(ctx context.Context, client *http.Client, target *url.URL) ([]string, error) {
req, err := http.NewRequestWithContext(ctx, http.MethodGet, target.String(), nil)
if err != nil {
return nil, fmt.Errorf("create request: %w", err)
}
resp, err := client.Do(req)
if err != nil {
return nil, fmt.Errorf("fetch page: %w", err)
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
return nil, fmt.Errorf("unexpected status %s", resp.Status)
}
doc, err := goquery.NewDocumentFromReader(resp.Body)
if err != nil {
return nil, fmt.Errorf("parse html: %w", err)
}
results := make([]string, 0)
doc.Find("video,source").Each(func(_ int, sel *goquery.Selection) {
if src, ok := sel.Attr("src"); ok {
if resolved := resolveURL(target, src); resolved != "" {
results = append(results, resolved)
}
}
})
attrPatterns := []string{"data-src", "data-hls", "data-hls-src"}
doc.Find("*[data-src], *[data-hls], *[data-hls-src]").Each(func(_ int, sel *goquery.Selection) {
for _, attr := range attrPatterns {
if val, ok := sel.Attr(attr); ok {
if resolved := resolveURL(target, val); resolved != "" {
results = append(results, resolved)
}
}
}
})
hrefPattern := regexp.MustCompile(`(?i)\.m3u8(\?.*)?$`)
doc.Find("a[href], link[href]").Each(func(_ int, sel *goquery.Selection) {
if href, ok := sel.Attr("href"); ok && hrefPattern.MatchString(href) {
if resolved := resolveURL(target, href); resolved != "" {
results = append(results, resolved)
}
}
})
results = append(results, findPlaylistInScripts(target, doc)...)
uniq := uniqueStrings(results)
return uniq, nil
}
func resolveURL(baseURL *url.URL, ref string) string {
if ref == "" {
return ""
}
if strings.HasPrefix(ref, "data:") {
return ""
}
parsed, err := baseURL.Parse(ref)
if err != nil {
return ""
}
return parsed.String()
}
func findPlaylistInScripts(baseURL *url.URL, doc *goquery.Document) []string {
var results []string
pattern := regexp.MustCompile(`https?://[^"'\\\s]+\.m3u8[^"'\\\s]*`)
doc.Find("script").Each(func(_ int, sel *goquery.Selection) {
text := sel.Text()
for _, match := range pattern.FindAllString(text, -1) {
if resolved := resolveURL(baseURL, match); resolved != "" {
results = append(results, resolved)
}
}
})
return results
}
func uniqueStrings(in []string) []string {
seen := make(map[string]struct{}, len(in))
out := make([]string, 0, len(in))
for _, item := range in {
if item == "" {
continue
}
if _, exists := seen[item]; exists {
continue
}
seen[item] = struct{}{}
out = append(out, item)
}
return out
}
func collectSegments(playlist *m3u8.MediaPlaylist) []segmentInfo { func collectSegments(playlist *m3u8.MediaPlaylist) []segmentInfo {
segments := make([]segmentInfo, 0, len(playlist.Segments)) segments := make([]segmentInfo, 0, len(playlist.Segments))
for _, segment := range playlist.Segments { for _, segment := range playlist.Segments {
@@ -244,6 +604,27 @@ func ensureMP4Extension(name string) string {
return trimmed + ".mp4" return trimmed + ".mp4"
} }
func ensureTSExtension(name string) string {
lower := strings.ToLower(name)
if strings.HasSuffix(lower, ".ts") {
return name
}
ext := filepath.Ext(name)
trimmed := strings.TrimSuffix(name, ext)
if trimmed == "" {
trimmed = "output"
}
return trimmed + ".ts"
}
func inferOutputNameMust(rawURL string) string {
parsed, err := url.Parse(rawURL)
if err != nil {
return ensureMP4Extension("download")
}
return inferOutputName(parsed)
}
func transmuxToMP4(ctx context.Context, tsPath, mp4Path string) error { func transmuxToMP4(ctx context.Context, tsPath, mp4Path string) error {
if _, err := exec.LookPath("ffmpeg"); err != nil { if _, err := exec.LookPath("ffmpeg"); err != nil {
return errFFmpegMissing return errFFmpegMissing