From: Kevin Wang via ffmpeg-devel <ffmpeg-devel@ffmpeg.org>
To: ffmpeg-devel@ffmpeg.org
Cc: Kevin Wang <code@ffmpeg.org>
Subject: [FFmpeg-devel] [PATCH] avcodec/h264: ignore POC when flag is set (PR #20262)
Date: Sun, 17 Aug 2025 05:50:58 +0300 (EEST)
Message-ID: <20250817025058.7678E68D322@ffbox0-bg.ffmpeg.org> (raw)
PR #20262 opened by Kevin Wang (kevmo314)
URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20262
Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20262.patch
When the flag AV_CODEC_FLAG_OUTPUT_CORRUPT or AV_CODEC_FLAG2_SHOW_ALL
is set, ignore any out of order POC's as they may still be valid
frames.
Signed-off-by: Kevin Wang <kevmo314@gmail.com>
From 2e24af0e19fd29fe16d544bfe65f21a278787a27 Mon Sep 17 00:00:00 2001
From: kevmo314 <kevmo314@gmail.com>
Date: Sun, 17 Aug 2025 02:49:55 +0000
Subject: [PATCH] avcodec/h264: ignore POC when flag is set
When the flag AV_CODEC_FLAG_OUTPUT_CORRUPT or AV_CODEC_FLAG2_SHOW_ALL
is set, ignore any out of order POC's as they may still be valid
frames.
Signed-off-by: kevmo314 <kevmo314@gmail.com>
---
libavcodec/h264_slice.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/libavcodec/h264_slice.c b/libavcodec/h264_slice.c
index 7e53e38cca..14650aca91 100644
--- a/libavcodec/h264_slice.c
+++ b/libavcodec/h264_slice.c
@@ -1352,7 +1352,8 @@ static int h264_select_output_frame(H264Context *h)
out_idx = i;
}
if (h->avctx->has_b_frames == 0 &&
- ((h->delayed_pic[0]->f->flags & AV_FRAME_FLAG_KEY) || h->delayed_pic[0]->mmco_reset))
+ // Check if we should ignore the output order and output the frame
+ ((h->delayed_pic[0]->f->flags & AV_FRAME_FLAG_KEY) || h->delayed_pic[0]->mmco_reset || h->avctx->flags & (AV_CODEC_FLAG_OUTPUT_CORRUPT | AV_CODEC_FLAG2_SHOW_ALL)))
h->next_outputed_poc = INT_MIN;
out_of_order = out->poc < h->next_outputed_poc;
--
2.49.1
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