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Allow customisation of preview generation (#673)

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* Add generate-specific options
* Include no-cache in preview response
This commit is contained in:
WithoutPants
2020-07-23 12:51:35 +10:00
committed by GitHub
parent 37be146a9d
commit a2341f0819
18 changed files with 509 additions and 53 deletions
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16
pkg/manager/generator_preview.go
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@@ -36,9 +36,6 @@ func NewPreviewGenerator(videoFile ffmpeg.VideoFile, videoFilename string, image
return nil, err
}
generator.ChunkCount = 12 // 12 segments to the preview
if err := generator.configure(); err != nil {
return nil, err
}
return &PreviewGenerator{
Info: generator,
@@ -53,6 +50,11 @@ func NewPreviewGenerator(videoFile ffmpeg.VideoFile, videoFilename string, image
func (g *PreviewGenerator) Generate() error {
logger.Infof("[generator] generating scene preview for %s", g.Info.VideoFile.Path)
if err := g.Info.configure(); err != nil {
return err
}
encoder := ffmpeg.NewEncoder(instance.FFMPEGPath)
if err := g.generateConcatFile(); err != nil {
@@ -95,15 +97,17 @@ func (g *PreviewGenerator) generateVideo(encoder *ffmpeg.Encoder) error {
return nil
}
stepSize := int(g.Info.VideoFile.Duration / float64(g.Info.ChunkCount))
stepSize, offset := g.Info.getStepSizeAndOffset()
for i := 0; i < g.Info.ChunkCount; i++ {
time := i * stepSize
time := offset + (float64(i) * stepSize)
num := fmt.Sprintf("%.3d", i)
filename := "preview" + num + ".mp4"
chunkOutputPath := instance.Paths.Generated.GetTmpPath(filename)
options := ffmpeg.ScenePreviewChunkOptions{
Time: time,
StartTime: time,
Duration: g.Info.ChunkDuration,
Width: 640,
OutputPath: chunkOutputPath,
}