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Fast Video Compression on Android

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问题 I want to upload video files to server and compress before uploading. I'm using ffmpeg libx264. I have seen viber can upload 30 second video file of size 78MB within a minute [reduce it's down to 2.3MB]. I want to know how do they do it so fast? What I have tried so far - FFMPEG version : n2.4.2 Built with gcc 4.8 Build Configuraiton : --target-os=linux --cross-prefix=/home/sb/Source-Code/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime

FFMPEG (libx264) “height not divisible by 2”

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I am trying to encode a .mp4 video from a set of frames using FFMPEG using the libx264 codec. This is the command I am running: /usr/local/bin/ffmpeg -r 24 -i frame_%05d.jpg -vcodec libx264 -y -an video.mp4 I sometimes get the following error: [libx264 @ 0xa3b85a0] height not divisible by 2 (520x369) After searching around a bit it seems that the issue has something to do with the scaling algorithm and can be fixed by adding a -vf argument. However, in my case I don't want to do any scaling. Ideally, I want to keep the dimensions exactly the same as the frames. Any advice? Is there some sort

FFMPEG (libx264) “height not divisible by 2”

阅读更多关于 FFMPEG (libx264) “height not divisible by 2”

问题 I am trying to encode a .mp4 video from a set of frames using FFMPEG using the libx264 codec. This is the command I am running: /usr/local/bin/ffmpeg -r 24 -i frame_%05d.jpg -vcodec libx264 -y -an video.mp4 I sometimes get the following error: [libx264 @ 0xa3b85a0] height not divisible by 2 (520x369) After searching around a bit it seems that the issue has something to do with the scaling algorithm and can be fixed by adding a -vf argument. However, in my case I don\'t want to do any scaling.