android-ffmpeg

问题 i am trying to make a video from selected images from command line using ffmpeg in android using this project as my source i m trying to make video this is the command i m trying to create video String[] ffmpegCommand = {ffmpegBin, "-y", "-qscale", "1", "-r", "" + frameRate, "-i", image1.getAbsolutePath(), "-t", "" + (((4) * 30) + 4), //"-s",heightwidth, "-i", image2.getAbsolutePath(), "-t", "" + (((4) * 30) + 4), //"-s",heightwidth, "-i", image3.getAbsolutePath(), "-t", "" + (((4) * 30) + 4)

问题 execFFmpegBinary(new String[]{"-y", "-i", path, "-s", "160x120", "-r", "25", "-vcodec", "mpeg4", "-b:v", "150k", "-b:a", "48000", "-ac", "2", "-ar", "22050", filePath}); video auto rotate after compress.. is there any solution? here is lib Link 回答1: it might be the autorotate issue in FFMPEG and you have to disable autorotate: ffmpeg -noautorotate -i input.mp4 output.mp4 if this solution doesn't solve your problem, you can get the input video rotation with Android APIs like this:

问题 execFFmpegBinary(new String[]{"-y", "-i", path, "-s", "160x120", "-r", "25", "-vcodec", "mpeg4", "-b:v", "150k", "-b:a", "48000", "-ac", "2", "-ar", "22050", filePath}); video auto rotate after compress.. is there any solution? here is lib Link 回答1: it might be the autorotate issue in FFMPEG and you have to disable autorotate: ffmpeg -noautorotate -i input.mp4 output.mp4 if this solution doesn't solve your problem, you can get the input video rotation with Android APIs like this:

问题 There are many questions on this topic link1, link2, and link3. However, I am asking for suggestions on the probable solution and if it has some drawbacks. Problem Definition: amix-filter always does "volume normalization" and can't be turned off Reference: Please read comments over here by @Reino. He also had opened a ticket on the FFmpeg forum to explain the situation. Hacky Solution: amix=inputs=13:dropout_transition=1000,volume=13 Reference: Answered here, and also in the ticket.

问题 I want to compile ffmpeg on my Mac. The ndk version is r19c and the FFmpeg version is 4.1.3. The build script is copied from this article. But there are some problems when compiling, as follows： Thanks！！！ 回答1: Starting with NDK r19 everything you need can be found in the <NDK>/toolchains/llvm/prebuilt/<host> directory. Stripped down example for arm64-v8a targeting API 28: export ANDROID_NDK_ROOT=/path/to/android-ndk-r19c export PATH=$ANDROID_NDK_ROOT/toolchains/llvm/prebuilt/darwin-x86_64/bin

问题 I am trying to convert ogg audio file to mp3 or other audio file formats that can be played in ios devices But ogg files are not being converted into other formats like mp3 and caf. I am testing the conversion in android device. This is my ffmpeg command arguments: Command: "ffmpeg -y -i $inputFilePath -c:a copy $outputFilePath" Both input and output filenames were surrounded with quotations [-y, -i, /data/user/0/com.musicapp/files/composer_audios/testtt ogg file.ogg, -c:a, copy, /storage

问题 I am trying to convert ogg audio file to mp3 or other audio file formats that can be played in ios devices But ogg files are not being converted into other formats like mp3 and caf. I am testing the conversion in android device. This is my ffmpeg command arguments: Command: "ffmpeg -y -i $inputFilePath -c:a copy $outputFilePath" Both input and output filenames were surrounded with quotations [-y, -i, /data/user/0/com.musicapp/files/composer_audios/testtt ogg file.ogg, -c:a, copy, /storage

来源： https://stackoverflow.com/questions/63492437/ffmpeg-overlay-not-being-shown-when-enable-between-parameter-is-added

问题 I want to add a watermark to a video. so that when user select a video from gallery in the android studio. then watermark will be added to the video automatically like this. Please check the image that how i want to add watermark logo to a video with auto adjust logo size according to the video. Or when user will download a video then a watermark will be added to the videos. i have searched a lot but not found any library for adding watermark to a video. I have found something with FFMPEG but

问题 I'm using ffmpeg library in my Project. Problem is App apk size is too big. Anyone know how to reduce apk size ? Any help, suggestion or links would be highly appreciated. Thank you. 来源： https://stackoverflow.com/questions/50443539/ffmpeg-android-library-increase-size