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Remove -copyts and add -flush_packets 1 to subtitle extraction

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-copyts is unnecessary for -c:s copy to SRT and slows extraction ~5x.
Without -flush_packets 1, ffmpeg buffers all output until exit, leaving
.srt files at 0 bytes for minutes while the player shows no subtitles.

Fixes #16438
This commit is contained in:
Oscar
2026-03-19 22:33:16 +01:00
parent fda49a5a49
commit 3d2658fa43
1 changed files with 4 additions and 4 deletions
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8
MediaBrowser.MediaEncoding/Subtitles/SubtitleEncoder.cs
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@@ -569,7 +569,7 @@ namespace MediaBrowser.MediaEncoding.Subtitles
var outputPaths = new List<string>();
var args = string.Format(
CultureInfo.InvariantCulture,
"-i {0} -copyts",
"-i {0}",
inputPath);
foreach (var subtitleStream in subtitleStreams)
@@ -594,7 +594,7 @@ namespace MediaBrowser.MediaEncoding.Subtitles
outputPaths.Add(outputPath);
args += string.Format(
CultureInfo.InvariantCulture,
" -map 0:{0} -an -vn -c:s {1} \"{2}\"",
" -map 0:{0} -an -vn -c:s {1} -flush_packets 1 \"{2}\"",
streamIndex,
outputCodec,
outputPath);
@@ -613,7 +613,7 @@ namespace MediaBrowser.MediaEncoding.Subtitles
var outputPaths = new List<string>();
var args = string.Format(
CultureInfo.InvariantCulture,
"-i {0} -copyts",
"-i {0}",
inputPath);
foreach (var subtitleStream in subtitleStreams)
@@ -639,7 +639,7 @@ namespace MediaBrowser.MediaEncoding.Subtitles
outputPaths.Add(outputPath);
args += string.Format(
CultureInfo.InvariantCulture,
" -map 0:{0} -an -vn -c:s {1} \"{2}\"",
" -map 0:{0} -an -vn -c:s {1} -flush_packets 1 \"{2}\"",
streamIndex,
outputCodec,
outputPath);