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• How to combine multiple videos in android using ffmpeg ?

  23 mai 2023, par Haeiny

  I added dependency to use ffmpeg on Android.

  


  implementation "com.arthenica:mobile-ffmpeg-full:4.4"


  


  And I wanted to combine the videos from the gallery, so I temporarily saved the imported video in the cache directory in the app.

  


  After that, I wrote the following function to take the saved images and merge them using ffmpeg :

  


  
fun mergeVideos(videoPaths: List\): Int {
        val cacheDirectory = this.externalCacheDir
        mergedVideoFile = File(cacheDirectory, "merged_video.mp4").absolutePath

        val command = StringBuilder()
        command.append("ffmpeg")
        for (videoPath in videoPaths) {
            command.append(" -i ").append(videoPath)
        }

        command.append(" -filter_complex ").append("\"")
        for (i in videoPaths.indices) {
            command.append("[$i:v] ").append("[$i:a] ")
        }

        command.append("concat=n=").append(videoPaths.size).append(":v=1:a=1 [v] [a]").append("\"")
        command.append(" -map \"[v]\" -map \"[a]\" ").append(mergedVideoFile)
    
        return FFmpeg.execute(command.toString())
    }


  


  I wanted to temporarily save the merged video in the "mergedVideoFile" so that I could save them in the cache directory, and videoPaths would get the Urls of the videos I wanted to merge into the list.

  


  The command verified through Log.d :

  


  
ffmpeg -i /storage/emulated/0/Android/data/"project name"/files/Movies/VIDEO1.mp4 -i /storage/emulated/0/Android/data/"project name"/files/Movies/VIDEO2.mp4 -filter_complex "\[0:v\] \[0:a\] \[1:v\] \[1:a\] concat=n=2:v=1:a=1 \[v\] \[a\]" -map "\[v\]" -map "\[a\]" /storage/emulated/0/Android/data/"project name"/cache/merged_video.mp4


  


  result of mergeVideos execution :

  


  
Loading mobile-ffmpeg.
Loaded mobile-ffmpeg-full-arm64-v8a-4.4-20210207.
Callback thread started.
ffmpeg version v4.4-dev-416
Copyright (c) 2000-2020 the FFmpeg developers
built with Android (6454773 based on r365631c2) clang version 9.0.8 (https://android.googlesource.com/toolchain/llvm-project 98c855489587874b2a325e7a516b99d838599c6f) (based on LLVM 9.0.8svn)

configuration: --cross-prefix=aarch64-linux-android- --sysroot=/files/android-sdk/ndk/21.3.6528147/toolchains/llvm/prebuilt/linux-x86_64/sysroot --prefix=/home/taner/Projects/mobile-ffmpeg/prebuilt/android-arm64/ffmpeg --pkg-config=/usr/bin/pkg-config --enable-version3 --arch=aarch64 --cpu=armv8-a --cc=aarch64-linux-android24-clang --cxx=aarch64-linux-android24-clang++ --extra-libs='-L/home/taner/Projects/mobile-ffmpeg/prebuilt/android-arm64/cpu-features/lib -lndk_compat' --target-os=android --enable-neon --enable-asm --enable-inline-asm --enable-cross-compile --enable-pic --enable-jni --enable-optimizations --enable-swscale --enable-shared --enable-v4l2-m2m --disable-outdev=fbdev --disable-indev=fbdev --enable-small --disable-openssl --disable-xmm-clobber-test --disable-debug --enable-lto --disable-neon-clobber-test --disable-programs --disable-postproc --disable-doc --disable-htmlpages --disable-manpages --disable-podpages --disable-txtpages --disable-static --disable-sndio --disable-schannel --disable-securetransport --disable-xlib --disable-cuda --disable-cuvid --disable-nvenc --disable-vaapi --disable-vdpau --disable-videotoolbox --disable-audiotoolbox --disable-appkit --disable-alsa --disable-cuda --disable-cuvid --disable-nvenc --disable-vaapi --disable-vdpau --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-gmp --enable-gnutls --enable-libmp3lame --enable-libass --enable-iconv --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libxml2 --enable-libopencore-amrnb --enable-libshine --enable-libspeex --enable-libwavpack --enable-libkvazaar --enable-libilbc --enable-libopus --enable-libsnappy --enable-libsoxr --enable-libaom --enable-libtwolame --disable-sdl2 --enable-libvo-amrwbenc --enable-zlib --enable-mediacodec

libavutil      56. 55.100 / 56. 55.100
libavcodec     58. 96.100 / 58. 96.100
libavformat    58. 48.100 / 58. 48.100
libavdevice    58. 11.101 / 58. 11.101
libavfilter     7. 87.100 /  7. 87.100
libswscale      5.  8.100 /  5.  8.100
libswresample   3.  8.100 /  3.  8.100

Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/Android/data/"project name"/files/Movies/VIDEO1.mp4':

Metadata:
major_brand     :   mp42
minor_version   :   0
compatible_brands:  isommp42
creation_time   :   2023-05-02T12:22:45.000000Z
com.android.version:  11
com.android.capture.fps:  30.000000
Duration:  00:00:02.51  , start:   0.000000  , bitrate:  14232 kb/s

      Stream #0:0

(eng)
: Video: h264 (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080, 14022 kb/s
, SAR 1:1 DAR 16:9 ,  30 fps, 30 tbr,  90k tbn,  180k tbc   (default)

Metadata:
rotate          :  90
creation_time   : 2023-05-02T12:22:45.000000Z
handler_name    :  VideoHandle
Side data:
displaymatrix: rotation of -90.00 degrees

      Stream #0:1

(eng)
: Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 256 kb/s   (default)

     Metadata:
        creation_time   :   2023-05-02T12:22:45.000000Z
        handler_name    :   SoundHandle

Input #1, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/Android/data/"project name"/files/Movies/VIDEO2.mp4':

... Input #1's video metadatas ...

\[NULL @ 0x78367662e0\] Unable to find a suitable output format for 'ffmpeg'
ffmpeg: Invalid argument


  


  I don't know what is the problem in my code.
Please help me.

  


• Error setting option use_wallclock_as_timestamps to value 1 in FFmpegFrameGrabber - avformat_open_input() error -22

  29 mai 2023, par githubwyj

  avformat_open_input() error -22 Error setting option

  


  FFmpegFrameGrabber grabber = new FFmpegFrameGrabber("rtsp://xxxxx");
grabber.setOption("use_wallclock_as_timestamps", "1");
grabber.setOption("rtsp_transport", "tcp");
grabber.setOption("rtsp_flags", "prefer_tcp");

grabber.start();


  


  I used ffmpeg in JavaCV to pull rtsp streams, but there was an error like this

  


  Error: [rtsp @ 0x7f2770145a60] Invalid option type.

Error: [rtsp @ 0x7f2770145a60] Error setting option use_wallclock_as_timestamps to value 1.

Error: [rtsp @ 0x7f2770145a60] Invalid option type.

Error: [rtsp @ 0x7f2770145a60] Error setting option use_wallclock_as_timestamps to value 1.

org.bytedeco.javacv.FFmpegFrameGrabber$Exception: avformat_open_input() error -22: Could not open input "rtsp://xxxx@10.10.10.119:554/video/1". (Has setFormat() been called?) (For more details, make sure FFmpegLogCallback.set() has been called.)
        at org.bytedeco.javacv.FFmpegFrameGrabber.startUnsafe(FFmpegFrameGrabber.java:975)
        at org.bytedeco.javacv.FFmpegFrameGrabber.start(FFmpegFrameGrabber.java:903)
        at org.bytedeco.javacv.FFmpegFrameGrabber.start(FFmpegFrameGrabber.java:898)




  


  When I removed grabber.setOption("use_wallclock_as_timestamps", "1");, the following error occurred：

  


  2023-05-29 11:11:02.169 [pool-2-thread-9] ERROR [FFmpegLogCallback:54] - [RTSP demuxer @ 0x7f2b8c007240] [Eval @ 0x7f2b32790080] Undefined constant or missing '(' in 'prefer_tcp'

2023-05-29 11:11:02.169 [pool-2-thread-9] ERROR [FFmpegLogCallback:54] - [RTSP demuxer @ 0x7f2b8c007240] Unable to parse option value "prefer_tcp"

2023-05-29 11:11:02.170 [pool-2-thread-9] ERROR [FFmpegLogCallback:54] - [RTSP demuxer @ 0x7f2b8c007240] Error setting option rtsp_flags to value prefer_tcp.

2023-05-29 11:11:02.170 [pool-2-thread-9] ERROR [FFmpegLogCallback:54] - [RTSP demuxer @ 0x7f2b8c007240] [Eval @ 0x7f2b32790080] Undefined constant or missing '(' in 'prefer_tcp'

2023-05-29 11:11:02.170 [pool-2-thread-9] ERROR [FFmpegLogCallback:54] - [RTSP demuxer @ 0x7f2b8c007240] Unable to parse option value "prefer_tcp"

2023-05-29 11:11:02.170 [pool-2-thread-9] ERROR [FFmpegLogCallback:54] - [RTSP demuxer @ 0x7f2b8c007240] Error setting option rtsp_flags to value prefer_tcp.



org.bytedeco.javacv.FFmpegFrameGrabber$Exception: avformat_open_input() error -22: Could not open input "rtsp://xxxx@10.10.10.119:554/video/1". (Has setFormat() been called?) (For more details, make sure FFmpegLogCallback.set() has been called.)
        at org.bytedeco.javacv.FFmpegFrameGrabber.startUnsafe(FFmpegFrameGrabber.java:975)
        at org.bytedeco.javacv.FFmpegFrameGrabber.start(FFmpegFrameGrabber.java:903)
        at org.bytedeco.javacv.FFmpegFrameGrabber.start(FFmpegFrameGrabber.java:898)



  


  javacv&ffmpeg :

  


  'org.bytedeco:javacv-platform:1.5.8',
'org.bytedeco:ffmpeg-platform:5.1.2-1.5.8',


  


• The latest ffmpeg shows "get_buffer() failed". Is this a bug ?

  20 juin 2023, par Ryan

  ffmpeg version 2023-06-19-git-1617d1a752-full_build-www.gyan.dev

  


  i7-1255U, Windows 11

  


  The command line is

  


  "ffmpeg.exe"  -y  -hwaccel qsv  -ss 00:00:03.461  -to 00:00:12.009  -i "input.mov"   -c:v h264_qsv -global_quality 25 -look_ahead 1 -preset veryslow -c:a aac -ar 48000 -ac 2 -ab 128k output.mp4


  


  The "input.mov" is mjpeg.

  


  The result is :

  


  [mjpeg_qsv @ 0000019930260080] get_buffer() failed
[vist#0:0/mjpeg @ 000001993025ff00] Error submitting packet to decoder: Cannot allocate memory
[mjpeg_qsv @ 0000019930260080] get_buffer() failed
[vist#0:0/mjpeg @ 000001993025ff00] Error submitting packet to decoder: Cannot allocate memory
[mjpeg_qsv @ 0000019930260080] get_buffer() failed
[vist#0:0/mjpeg @ 000001993025ff00] Error submitting packet to decoder: Cannot allocate memory
[mjpeg_qsv @ 0000019930260080] get_buffer() failed
[vist#0:0/mjpeg @ 000001993025ff00] Error submitting packet to decoder: Cannot allocate memory
[mjpeg_qsv @ 0000019930260080] get_buffer() failed
[vist#0:0/mjpeg @ 000001993025ff00] Error submitting packet to decoder: Cannot allocate memory


  


  The messages above repeats many many many times. Finally, it shows :

  


  [vist#0:0/mjpeg @ 000001993025ff00] Error submitting EOF to decoder: Cannot allocate memory


  


  I tried the same command line on a very old version, and it works fine. Is this a bug or there is something new that comes with the new version ?

  


  Thank you for your help.