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Tue, 23 Dec 2025 06:40:27 -0800 (PST) MIME-Version: 1.0 Date: Tue, 23 Dec 2025 20:10:14 +0530 X-Gm-Features: AQt7F2ovghvhADSDkXx9HhwFP59UDHw5oykmol3olbfTC3uyw984HwZnm0umB60 Message-ID: To: ffmpeg-devel@ffmpeg.org Content-Type: multipart/mixed; boundary="00000000000053564106469f86c3" Message-ID-Hash: 75ZXRY72Y5XRFXDD3SXHKJOPTXV6GNII X-Message-ID-Hash: 75ZXRY72Y5XRFXDD3SXHKJOPTXV6GNII X-MailFrom: SRS0=JFHy=65=gmail.com=imraja729@ffmpeg.org X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; loop; banned-address; header-match-ffmpeg-devel.ffmpeg.org-0; header-match-ffmpeg-devel.ffmpeg.org-1; header-match-ffmpeg-devel.ffmpeg.org-2; header-match-ffmpeg-devel.ffmpeg.org-3; emergency; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Content-Filtered-By: Mailman/MimeDel 3.3.10 X-Mailman-Version: 3.3.10 Precedence: list Reply-To: FFmpeg development discussions and patches Subject: [FFmpeg-devel] [PATCH] avfilter/vf_blackframe: add slice threading List-Id: FFmpeg development discussions and patches Archived-At: Archived-At: List-Archive: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: From: Raja Rathour via ffmpeg-devel Cc: Raja Rathour Archived-At: List-Archive: List-Post: --00000000000053564106469f86c3 Content-Type: text/plain; charset="UTF-8" This patch adds slice threading support to the blackframe filter. It implements the standard Map-Reduce pattern: each thread processes a vertical slice of the frame, and the main thread sums the results. Benchmarks: Input: 4K Video (3840x2160, YUV420P), 250 frames, 100% black. Command: ./ffmpeg -f lavfi -i color=c=black:s=3840x2160:d=10 -vf blackframe -benchmark -f null - Results (on 4-core system): - Single-threaded: ~0.259s (real) - Multi-threaded: ~0.077s (real) - Speedup: ~3.36x Signed-off-by: Raja Rathour --00000000000053564106469f86c3 Content-Type: text/x-patch; charset="US-ASCII"; name="0001-avfilter-vf_blackframe-add-slice-threading.patch" Content-Disposition: attachment; filename="0001-avfilter-vf_blackframe-add-slice-threading.patch" Content-Transfer-Encoding: base64 Content-ID: X-Attachment-Id: f_mjiooefe0 RnJvbSAyMzBlODE5YWI2OWY4MDIyYzRlNjc2MmI1OWI2ODJhMTM5Y2VhYTBiIE1vbiBTZXAgMTcg MDA6MDA6MDAgMjAwMQpGcm9tOiBSYWphIFJhdGhvdXIgPGltcmFqYTcyOUBnbWFpbC5jb20+CkRh dGU6IFR1ZSwgMjMgRGVjIDIwMjUgMTk6NDg6NDYgKzA1MzAKU3ViamVjdDogW1BBVENIXSBhdmZp bHRlci92Zl9ibGFja2ZyYW1lOiBhZGQgc2xpY2UgdGhyZWFkaW5nCgotLS0KIGxpYmF2ZmlsdGVy L3ZmX2JsYWNrZnJhbWUuYyB8IDgwICsrKysrKysrKysrKysrKysrKysrKysrKysrKysrKysrLS0t 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