3.4 KiB
TO DO
javascript for hiding form questions
function newQuestion(){ $question.hide(); $question.first().show(); $form.on("click", ".new-question", function() { $(this).parent().parent().next().slideDown("slow"); }); }
ffmpeg questions and answers:
Examples via http://www.catswhocode.com/blog/19-ffmpeg-commands-for-all-needs
Getting infos from a video file ffmpeg -i video.avi Turn X images to a video sequence ffmpeg -f image2 -i image%d.jpg video.mpg This command will transform all the images from the current directory (named image1.jpg, image2.jpg, etc…) to a video file named video.mpg.
Turn a video to X images ffmpeg -i video.mpg image%d.jpg This command will generate the files named image1.jpg, image2.jpg, …
The following image formats are also availables : PGM, PPM, PAM, PGMYUV, JPEG, GIF, PNG, TIFF, SGI.
Encode a video sequence for the iPpod/iPhone ffmpeg -i source_video.avi input -acodec aac -ab 128kb -vcodec mpeg4 -b 1200kb -mbd 2 -flags +4mv+trell -aic 2 -cmp 2 -subcmp 2 -s 320x180 -title X final_video.mp4 Explanations :
Source : source_video.avi Audio codec : aac Audio bitrate : 128kb/s Video codec : mpeg4 Video bitrate : 1200kb/s Video size : 320px par 180px Generated video : final_video.mp4 Encode video for the PSP ffmpeg -i source_video.avi -b 300 -s 320x240 -vcodec xvid -ab 32 -ar 24000 -acodec aac final_video.mp4 Explanations :
Source : source_video.avi Audio codec : aac Audio bitrate : 32kb/s Video codec : xvid Video bitrate : 1200kb/s Video size : 320px par 180px Generated video : final_video.mp4 Extracting sound from a video, and save it as Mp3 ffmpeg -i source_video.avi -vn -ar 44100 -ac 2 -ab 192 -f mp3 sound.mp3 Explanations :
Source video : source_video.avi Audio bitrate : 192kb/s output format : mp3 Generated sound : sound.mp3 Convert a wav file to Mp3 ffmpeg -i son_origine.avi -vn -ar 44100 -ac 2 -ab 192 -f mp3 son_final.mp3 Convert .avi video to .mpg ffmpeg -i video_origine.avi video_finale.mpg Convert .mpg to .avi ffmpeg -i video_origine.mpg video_finale.avi Convert .avi to animated gif(uncompressed) ffmpeg -i video_origine.avi gif_anime.gif Mix a video with a sound file ffmpeg -i son.wav -i video_origine.avi video_finale.mpg Convert .avi to .flv ffmpeg -i video_origine.avi -ab 56 -ar 44100 -b 200 -r 15 -s 320x240 -f flv video_finale.flv Convert .avi to dv ffmpeg -i video_origine.avi -s pal -r pal -aspect 4:3 -ar 48000 -ac 2 video_finale.dv Or:
ffmpeg -i video_origine.avi -target pal-dv video_finale.dv Convert .avi to mpeg for dvd players ffmpeg -i source_video.avi -target pal-dvd -ps 2000000000 -aspect 16:9 finale_video.mpeg Explanations :
target pal-dvd : Output format ps 2000000000 maximum size for the output file, in bits (here, 2 Gb) aspect 16:9 : Widescreen Compress .avi to divx ffmpeg -i video_origine.avi -s 320x240 -vcodec msmpeg4v2 video_finale.avi Compress Ogg Theora to Mpeg dvd ffmpeg -i film_sortie_cinelerra.ogm -s 720x576 -vcodec mpeg2video -acodec mp3 film_terminée.mpg Compress .avi to SVCD mpeg2 NTSC format:
ffmpeg -i video_origine.avi -target ntsc-svcd video_finale.mpg PAL format:
ffmpeg -i video_origine.avi -target pal-svcd video_finale.mpg Compress .avi to VCD mpeg2 NTSC format:
ffmpeg -i video_origine.avi -target ntsc-vcd video_finale.mpg PAL format:
ffmpeg -i video_origine.avi -target pal-vcd video_finale.mpg Multi-pass encoding with ffmpeg ffmpeg -i fichierentree -pass 2 -passlogfile ffmpeg2pass fichiersortie-2