diff options
Diffstat (limited to 'internal/media/video.go')
| -rw-r--r-- | internal/media/video.go | 141 |
1 files changed, 0 insertions, 141 deletions
diff --git a/internal/media/video.go b/internal/media/video.go deleted file mode 100644 index 5068be636..000000000 --- a/internal/media/video.go +++ /dev/null @@ -1,141 +0,0 @@ -// GoToSocial -// Copyright (C) GoToSocial Authors admin@gotosocial.org -// SPDX-License-Identifier: AGPL-3.0-or-later -// -// This program is free software: you can redistribute it and/or modify -// it under the terms of the GNU Affero General Public License as published by -// the Free Software Foundation, either version 3 of the License, or -// (at your option) any later version. -// -// This program is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU Affero General Public License for more details. -// -// You should have received a copy of the GNU Affero General Public License -// along with this program. If not, see <http://www.gnu.org/licenses/>. - -package media - -import ( - "fmt" - "io" - - "github.com/abema/go-mp4" - "github.com/superseriousbusiness/gotosocial/internal/iotools" - "github.com/superseriousbusiness/gotosocial/internal/log" -) - -type gtsVideo struct { - frame *gtsImage - duration float32 // in seconds - bitrate uint64 - framerate float32 -} - -// decodeVideoFrame decodes and returns an image from a single frame in the given video stream. -// (note: currently this only returns a blank image resized to fit video dimensions). -func decodeVideoFrame(r io.Reader) (*gtsVideo, error) { - // Check if video stream supports - // seeking, usually when *os.File. - rsc, ok := r.(io.ReadSeekCloser) - if !ok { - var err error - - // Store stream to temporary location - // in order that we can get seek-reads. - rsc, err = iotools.TempFileSeeker(r) - if err != nil { - return nil, fmt.Errorf("error creating temp file seeker: %w", err) - } - - defer func() { - // Ensure temp. read seeker closed. - if err := rsc.Close(); err != nil { - log.Errorf(nil, "error closing temp file seeker: %s", err) - } - }() - } - - // probe the video file to extract useful metadata from it; for methodology, see: - // https://github.com/abema/go-mp4/blob/7d8e5a7c5e644e0394261b0cf72fef79ce246d31/mp4tool/probe/probe.go#L85-L154 - info, err := mp4.Probe(rsc) - if err != nil { - return nil, fmt.Errorf("error during mp4 probe: %w", err) - } - - var ( - width int - height int - videoBitrate uint64 - audioBitrate uint64 - video gtsVideo - ) - - for _, tr := range info.Tracks { - if tr.AVC == nil { - // audio track - if br := tr.Samples.GetBitrate(tr.Timescale); br > audioBitrate { - audioBitrate = br - } else if br := info.Segments.GetBitrate(tr.TrackID, tr.Timescale); br > audioBitrate { - audioBitrate = br - } - - if d := float64(tr.Duration) / float64(tr.Timescale); d > float64(video.duration) { - video.duration = float32(d) - } - continue - } - - // video track - if w := int(tr.AVC.Width); w > width { - width = w - } - - if h := int(tr.AVC.Height); h > height { - height = h - } - - if br := tr.Samples.GetBitrate(tr.Timescale); br > videoBitrate { - videoBitrate = br - } else if br := info.Segments.GetBitrate(tr.TrackID, tr.Timescale); br > videoBitrate { - videoBitrate = br - } - - if d := float64(tr.Duration) / float64(tr.Timescale); d > float64(video.duration) { - video.framerate = float32(len(tr.Samples)) / float32(d) - video.duration = float32(d) - } - } - - // overall bitrate should be audio + video combined - // (since they're both playing at the same time) - video.bitrate = audioBitrate + videoBitrate - - // Check for empty video metadata. - var empty []string - if width == 0 { - empty = append(empty, "width") - } - if height == 0 { - empty = append(empty, "height") - } - if video.duration == 0 { - empty = append(empty, "duration") - } - if video.framerate == 0 { - empty = append(empty, "framerate") - } - if video.bitrate == 0 { - empty = append(empty, "bitrate") - } - if len(empty) > 0 { - return nil, fmt.Errorf("error determining video metadata: %v", empty) - } - - // Create new empty "frame" image. - // TODO: decode frame from video file. - video.frame = blankImage(width, height) - - return &video, nil -} |