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Files: re-encode a video the browser can't play, on the machine's own GPU, and play that

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The viewer tries the file as it is first. When the browser gives up — Safari and an MKV,
HEVC without a hardware decoder — or on a tap, a picker: codec (H.264, HEVC, AV1, or the
original codec repackaged) and size (original, 1080p, 720p, 480p), each codec labelled
with the engine this machine would use. POST /api/files/play runs ffmpeg into an HLS
event playlist of fragmented-MP4 segments under <data dir>/transcode/<id>/; Safari plays
HLS itself and everything else goes through hls.js, loaded only then. The recipes are
tried best first: a card on the bus before the integrated GPU, decoding on the same card
before decoding on the CPU and uploading, the software encoders last; a recipe that
produces no first segment is dropped for the next. The seekable range grows as ffmpeg
gets ahead; status says how far. Streams are reused for the same request, closed when
the player goes, swept after ten idle minutes, and the folder is emptied at start. Root
mode runs ffmpeg as root through a helper that ends when the daemon lets go of it.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
This commit is contained in:
Mitchell-Johnson
2026-10-11 17:42:25 -07:00
co-authored by Claude Fable 5.1
parent aa4ae57c22
commit f3c547adfa
18 changed files with 1351 additions and 32 deletions
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internal/media/inspect.go
+6 -6
View File
@@ -12,8 +12,8 @@ import (
"hamlab/internal/priv"
)
// Stream is one stream of a media file, as ffprobe reports it.
type Stream struct {
// Track is one stream of a media file, as ffprobe reports it.
type Track struct {
Index int `json:"index"`
Type string `json:"type"` // video | audio
Codec string `json:"codec"`
@@ -33,8 +33,8 @@ type Info struct {
Duration float64 `json:"duration"`
BitRate int64 `json:"bit_rate,omitempty"` // bits per second, whole file
Size int64 `json:"size,omitempty"`
Video *Stream `json:"video,omitempty"` // the first real picture stream; cover art is not it
Audio *Stream `json:"audio,omitempty"` // the first sound stream
Video *Track `json:"video,omitempty"` // the first real picture stream; cover art is not it
Audio *Track `json:"audio,omitempty"` // the first sound stream
}
// HDR reports a picture that needs tone mapping to look right on an SDR screen.
@@ -101,9 +101,9 @@ func Inspect(ctx context.Context, c Caps, path string, root bool) (Info, error)
in.Duration, _ = strconv.ParseFloat(pj.Format.Duration, 64)
in.BitRate, _ = strconv.ParseInt(pj.Format.BitRate, 10, 64)
in.Size, _ = strconv.ParseInt(pj.Format.Size, 10, 64)
var art *Stream
var art *Track
for _, s := range pj.Streams {
st := &Stream{Index: s.Index, Type: s.CodecType, Codec: s.CodecName, Profile: s.Profile, PixFmt: s.PixFmt, Width: s.Width, Height: s.Height,
st := &Track{Index: s.Index, Type: s.CodecType, Codec: s.CodecName, Profile: s.Profile, PixFmt: s.PixFmt, Width: s.Width, Height: s.Height,
ColorTransfer: s.ColorTransfer, Channels: s.Channels, AttachedPic: s.Disposition.AttachedPic != 0}
st.FPS = fps(s.AvgFrameRate)
if st.FPS == 0 {