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Fix FFmpeg seek fallback to avoid overshoot frame mismatches. Harden FFmpegReader::CheckSeek() when seek retries are exhausted.

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This commit is contained in:
Jonathan Thomas
2026-02-09 20:51:24 -06:00
parent f3c4504662
commit 367d21affe
1 changed files with 6 additions and 12 deletions
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18
src/FFmpegReader.cpp
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@@ -1511,18 +1511,12 @@ bool FFmpegReader::CheckSeek() {
if (seek_count < kSeekRetryMax) {
Seek(seeking_frame - (10 * seek_count * seek_count));
} else {
if (seek_stagnant_count >= kSeekStagnantMax) {
// Overshot and no progress: restart from the beginning and walk forward
Seek(1);
is_seeking = false;
seeking_frame = 0;
seeking_pts = -1;
} else {
// Give up retrying and walk forward
is_seeking = false;
seeking_frame = 0;
seeking_pts = -1;
}
// Retry budget exhausted: always restart from frame 1 and walk forward.
// This avoids returning frames from an overshot seek position.
Seek(1);
is_seeking = false;
seeking_frame = 0;
seeking_pts = -1;
}
} else {
// SEEK WORKED