On 1/19/20, Michael Koch <astroelectro...@t-online.de> wrote: > Am 19.01.2020 um 21:01 schrieb Paul B Mahol: >> On 1/19/20, Michael Koch <astroelectro...@t-online.de> wrote: >>> Hello, >>> >>> I've just found a problem that can be reproduced as follows: >>> >>> Step 1: Make a 6 seconds test video with 1kHz tone. The file is ok when >>> played. >>> >>> ffmpeg -f lavfi -i testsrc2=size=vga -f lavfi -i sine=1000 -t 6 -y >>> video.mp4 >>> >>> >>> Step 2: Make a 10 seconds audio file with silence and a short 3kHz tone >>> at t=3s. The file is ok when played. >>> >>> ffmpeg -f lavfi -i "sine=3000:duration=0.1" -af adelay=3000,apad -t 10 >>> -y audio.wav >>> >>> >>> Step 3: Combine both files into one video, and the audio sources shall >>> be mixed: >>> >>> ffmpeg -i video.mp4 -i audio.wav -filter_complex >>> "[0:a][1:a]amix=weights='1.0 1.0'" -shortest -y out.mp4 >>> >>> The output video has the correct length 6s, but I don't understand why >>> the 1kHz tone disappears after 4s and the last 2s are silence. >>> >>> The console output is below. >> Can not reproduce using nut container. > > When I change the output filename to out.nut, then it works as expected > (but with terrible image quality). Why doesn't it work with mp4 output?
Use different video encoder. Who knows? > > Michael > > _______________________________________________ > 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".
