[FFmpeg-cvslog] avfilter/codecview: Enable QP visualization for H.264

[Timothee]

ffmpeg | branch: master | Timothee <timothee.informatique at regaud-chapuy.fr> | Thu Jun 19 11:23:45 2025 +0200| [c94a419e32ea385b7557d516d32824b8f78ff302] | committer: Michael Niedermayer

avfilter/codecview: Enable QP visualization for H.264

The codecviewfilter, when used with qp=1, did not display quantization parameter values for H.264 streams because the QP table extraction was restricted to MPEG-2 video.

This patch enables H.264 support by updating ff_qp_table_extractto accept AV_VIDEO_ENC_PARAMS_H264. This allows for correct QP overlay on H.264 video

Signed-off-by: Timothee <timothee.informatique at regaud-chapuy.fr>
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=c94a419e32ea385b7557d516d32824b8f78ff302
---

 libavfilter/qp_table.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/libavfilter/qp_table.c b/libavfilter/qp_table.c
index 8137dc019f..abe46e810b 100644
--- a/libavfilter/qp_table.c
+++ b/libavfilter/qp_table.c
@@ -39,8 +39,9 @@ int ff_qp_table_extract(AVFrame *frame, int8_t **table, int *table_w, int *table
     sd = av_frame_get_side_data(frame, AV_FRAME_DATA_VIDEO_ENC_PARAMS);
     if (!sd)
         return 0;
-    par = (AVVideoEncParams*)sd->data;
-    if (par->type != AV_VIDEO_ENC_PARAMS_MPEG2 ||
+    par = (AVVideoEncParams *)sd->data;
+    if ((par->type != AV_VIDEO_ENC_PARAMS_MPEG2 &&
+         par->type != AV_VIDEO_ENC_PARAMS_H264) ||
         (par->nb_blocks != 0 && par->nb_blocks != nb_mb))
         return AVERROR(ENOSYS);