Re: [FFmpeg-user] overlay_cuda
No. On 11/7/19, Alex <3.1...@ukr.net> wrote: > We have overlay, overlay_qsv, overlay_opencl filters but don't have > overlay_cuda for speed up transcoding videos on nvidia GPU only. Using sw > overlay filter is slow down the transcoding because frames copied between > CPU and GPU ram. Can You implement overlay_cuda filter, please? > Alex > ___ > ffmpeg-user mailing list > ffmpeg-user@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe". ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
[FFmpeg-user] overlay_cuda
We have overlay, overlay_qsv, overlay_opencl filters but don't have overlay_cuda for speed up transcoding videos on nvidia GPU only. Using sw overlay filter is slow down the transcoding because frames copied between CPU and GPU ram. Can You implement overlay_cuda filter, please? Alex ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
[FFmpeg-user] Using Hauppague PCIe TV Tuner card - Need Timestamp on Marque
Hello all! I have been searching for a way to add a running date/time stamp in a marquee in videos recorded from a Huappauge Quad TV Tuner card. I have something kind of working that post processes the recorded .TS video files and adds a timestamp but the time is tied to the frame rate instead of the PC clock. Any ideas? Can I offer a reward for the solution? Here is the .bat file with the FFMPEG commands running the postprocessing. setlocal @echo off set sourcefile=%~1 set destfile=%~2 shift shift REM Variables set sourcefile=%sourcefile% set destfile=%destfile% set tempfile=%sourcefile:~0,-3%_tmp.mp4 set logofile=C:\Users\Public\WinTV\fox49-logo-header-v2.png set hour=%sourcefile:~-7,2% set min=%sourcefile:~-5,2% set year=%date:~10,4% set month=%date:~4,2% set day=%date:~7,2% set dts=%year%_%month%_%day% echo WinTV8 Post processing log. > postprocess.log echo sourcefile = %sourcefile% >> postprocess.log echo destfile = %destfile% >> postprocess.log echo tempfile = %tempfile% >> postprocess.log echo logofile = %logofile% >> postprocess.log echo hour = %hour% >> postprocess.log echo min = %min% >> postprocess.log echo dts = %dts% >> postprocess.log REM Video Processing echo Starting timecode overlay... >> postprocess.log ffmpeg -y -i %sourcefile% -b:v 1M -vcodec libx264 -preset ultrafast -s 480X360 -vf drawtext="text='%dts%\ \ \ \ ':timecode='%hour%\:%min%\:00\:00': rate=25: fontfile=C\\:\\Windows\\Fonts\\Ariel.ttf: x=400: y=h-lh-1: fontcolor=white:shadowcolor=black:shadowx=1:shadowy=1:fontsize=72:box=1:boxcolor=black@0.5:boxborderw=5:" %tempfile% echo End timecode overlay. >> postprocess.log echo Starting image overlay... >> postprocess.log ffmpeg -y -i %tempfile% -i %logofile% -filter_complex "[1:v]format=argb,geq=r='r(X,Y)':a='0.5*alpha(X,Y)'[image]; [0:v][image]overlay=(main_w-overlay_w-0):(main_h-overlay_h-2)" %destfile% echo End image overlay. >> postprocess.log REM Validate file exsists and cleanup if exist "%destfile%" ( del %tempfile% >> postprocess.log del %sourcefile% >> postprocess.log ) else ( echo Error processing file %sourcefile%. >> postprocessing.log ) echo End post processing. >> postprocess.log endlocal ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] FFmpeg & hashing algorithm speed
Thanks for the infos! And "yes": My PHP/Python examples were not related to FFmpeg, but this discovery led me to become curious how FFmpeg does it - and therefore ask this question :) Will read the Giorgio-Thread and maybe return with reproducible (commandline + uncut console output) question scenarios. Thank you very much! Pb On 07/11/2019 00:21, Carl Eugen Hoyos wrote: Am Do., 7. Nov. 2019 um 00:09 Uhr schrieb Carl Eugen Hoyos : Am Mi., 6. Nov. 2019 um 23:40 Uhr schrieb Peter B. : Hashing for fixity and transfer-checking seems to be quite a bottleneck for archiving big video/film files for archiving. Therefore I was considering if using "simpler" algorithms (like CRC instead of SHA256) could speed up the process. I was surprised that e.g. MD5 vs CRC in Python as well as PHP seemed to be equally "fast". But this is not related to FFmpeg, no? So I was wondering: Does FFmpeg have/do any speed optimization for hashing functionality (framemd5, hash muxer, etc) in its code? Some of Giorgio's commits were meant to increase hash function speed: http://git.videolan.org/?p=ffmpeg.git;a=search;s=vazzana;st=author There is an email with a script to compare the implementation's speeds, I don't know when it was sent to the development mailing list though. This mail leads to a long thread: http://mplayerhq.hu/pipermail/ffmpeg-devel/2013-May/143854.html In the end a file tools/ffhash.c was created to compare hash implementation speeds. Carl Eugen ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe". ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
