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94 lines
2.5 KiB
94 lines
2.5 KiB
package thumb
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import (
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"bytes"
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"context"
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"fmt"
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model "github.com/cloudreve/Cloudreve/v3/models"
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"github.com/cloudreve/Cloudreve/v3/pkg/util"
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"github.com/gofrs/uuid"
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"io"
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"os"
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"os/exec"
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"path/filepath"
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"strings"
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)
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func init() {
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RegisterGenerator(&FfmpegGenerator{})
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}
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type FfmpegGenerator struct {
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exts []string
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lastRawExts string
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}
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func (f *FfmpegGenerator) Generate(ctx context.Context, file io.Reader, src, name string, options map[string]string) (*Result, error) {
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ffmpegOpts := model.GetSettingByNames("thumb_ffmpeg_path", "thumb_ffmpeg_exts", "thumb_ffmpeg_seek", "thumb_encode_method", "temp_path")
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if f.lastRawExts != ffmpegOpts["thumb_ffmpeg_exts"] {
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f.exts = strings.Split(ffmpegOpts["thumb_ffmpeg_exts"], ",")
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}
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if !util.IsInExtensionList(f.exts, name) {
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return nil, fmt.Errorf("unsupported video format: %w", ErrPassThrough)
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}
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tempOutputPath := filepath.Join(
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util.RelativePath(ffmpegOpts["temp_path"]),
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"thumb",
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fmt.Sprintf("thumb_%s.%s", uuid.Must(uuid.NewV4()).String(), ffmpegOpts["thumb_encode_method"]),
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)
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tempInputPath := src
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if tempInputPath == "" {
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// If not local policy files, download to temp folder
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tempInputPath = filepath.Join(
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util.RelativePath(ffmpegOpts["temp_path"]),
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"thumb",
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fmt.Sprintf("ffmpeg_%s%s", uuid.Must(uuid.NewV4()).String(), filepath.Ext(name)),
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)
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// Due to limitations of ffmpeg, we need to write the input file to disk first
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tempInputFile, err := util.CreatNestedFile(tempInputPath)
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if err != nil {
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return nil, fmt.Errorf("failed to create temp file: %w", err)
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}
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defer os.Remove(tempInputPath)
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defer tempInputFile.Close()
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if _, err = io.Copy(tempInputFile, file); err != nil {
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return nil, fmt.Errorf("failed to write input file: %w", err)
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}
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tempInputFile.Close()
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}
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// Invoke ffmpeg
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scaleOpt := fmt.Sprintf("scale=%s:%s:force_original_aspect_ratio=decrease", options["thumb_width"], options["thumb_height"])
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cmd := exec.CommandContext(ctx,
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ffmpegOpts["thumb_ffmpeg_path"], "-ss", ffmpegOpts["thumb_ffmpeg_seek"], "-i", tempInputPath,
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"-vf", scaleOpt, "-vframes", "1", tempOutputPath)
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// Redirect IO
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var stdErr bytes.Buffer
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cmd.Stdin = file
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cmd.Stderr = &stdErr
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if err := cmd.Run(); err != nil {
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util.Log().Warning("Failed to invoke ffmpeg: %s", stdErr.String())
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return nil, fmt.Errorf("failed to invoke ffmpeg: %w", err)
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}
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return &Result{Path: tempOutputPath}, nil
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}
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func (f *FfmpegGenerator) Priority() int {
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return 200
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}
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func (f *FfmpegGenerator) EnableFlag() string {
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return "thumb_ffmpeg_enabled"
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}
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