LogalDeveloper/owncast
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Support multiple adaptive bitrates

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This commit is contained in:
Gabe Kangas
2020-06-09 01:52:15 -07:00
parent 29f51f6ccc
commit 0b5452de89
9 changed files with 213 additions and 54 deletions
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61
ffmpeg.go
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@@ -6,27 +6,72 @@ import (
"os"
"os/exec"
"path"
"strconv"
"strings"
)
func startFfmpeg(configuration Config) {
var outputDir = configuration.PublicHLSPath
var hlsPlaylistName = path.Join(configuration.PublicHLSPath, "stream.m3u8")
var variantPlaylistPath = configuration.PublicHLSPath
if configuration.IPFS.Enabled || configuration.S3.Enabled {
outputDir = configuration.PrivateHLSPath
hlsPlaylistName = path.Join(outputDir, "temp.m3u8")
variantPlaylistPath = configuration.PrivateHLSPath
}
log.Printf("Starting transcoder saving to /%s.", outputDir)
outputDir = path.Join(outputDir, "%v")
// var masterPlaylistName = path.Join(configuration.PublicHLSPath, "%v", "stream.m3u8")
var variantPlaylistName = path.Join(variantPlaylistPath, "%v", "stream.m3u8")
// var variantRootPath = configuration.PublicHLSPath
// variantRootPath = path.Join(variantRootPath, "%v")
// variantPlaylistName := path.Join("%v", "stream.m3u8")
log.Printf("Starting transcoder saving to /%s.", variantPlaylistName)
pipePath := getTempPipePath()
ffmpegCmd := "cat " + pipePath + " | " + configuration.FFMpegPath +
" -hide_banner -i pipe: -vf scale=" + strconv.Itoa(configuration.VideoSettings.ResolutionWidth) + ":-2 -g 48 -keyint_min 48 -preset ultrafast -f hls -hls_list_size 30 -hls_time " +
strconv.Itoa(configuration.VideoSettings.ChunkLengthInSeconds) + " -strftime 1 -use_localtime 1 -hls_segment_filename '" +
outputDir + "/stream-%Y%m%d-%s.ts' -hls_flags delete_segments -segment_wrap 100 " + hlsPlaylistName
var videoMaps = make([]string, 0)
var streamMaps = make([]string, 0)
var audioMaps = make([]string, 0)
for index, quality := range configuration.VideoSettings.StreamQualities {
videoMaps = append(videoMaps, fmt.Sprintf("-map v:0 -c:v:%d libx264 -b:v:%d %s", index, index, quality.Bitrate))
streamMaps = append(streamMaps, fmt.Sprintf("v:%d,a:%d", index, index))
audioMaps = append(audioMaps, "-map a:0")
}
ffmpegFlags := []string{
"-hide_banner",
"-i pipe:",
strings.Join(videoMaps, " "), // All the different video variants
strings.Join(audioMaps, " ") + " -c:a aac -b:a 192k -ac 2", // Audio for all the variants
"-master_pl_name stream.m3u8",
"-g 48",
"-keyint_min 48",
"-preset veryfast",
"-sc_threshold 0",
"-profile:v high",
"-f hls",
"-hls_list_size 30",
"-hls_time 10",
"-strftime 1",
"-use_localtime 1",
"-hls_playlist_type event",
"-hls_segment_filename " + path.Join(outputDir, "stream-%Y%m%d-%s.ts"),
"-hls_flags delete_segments+program_date_time+temp_file",
"-segment_wrap 100",
"-master_m3u8_publish_rate 5",
"-var_stream_map \"" + strings.Join(streamMaps, " ") + "\"",
variantPlaylistName,
}
ffmpegFlagsString := strings.Join(ffmpegFlags, " ")
ffmpegCmd := "cat " + pipePath + " | " + configuration.FFMpegPath + " " + ffmpegFlagsString
// fmt.Println(ffmpegCmd)
_, err := exec.Command("bash", "-c", ffmpegCmd).Output()
fmt.Println(err)
verifyError(err)
}