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cloudreve/pkg/thumb/ffmpeg.go

95 lines
2.6 KiB

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