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  • Android FFMPEG video editing operation failed

    30 mai 2022, par Bipin Vayalu

    I am using FFMPEG in my Android app for video cropping and trimming but when I execute the following command on a specific video. FFMPEG command execution failed and the app crashed.

    


    Command :

    


    ffmpeg -y -i "/storage/emulated/0/DCIM/Camera/Test-Video.mp4" -crf 19 -color_primaries 1 -color_trc 1 -colorspace 1 -vcodec h264 -acodec aac -ss 00:00:00 -t 00:00:15 -async 1 -vf "crop=540:539:0:0:exact=0 , scale='if(gt(iw,ih),min(640,iw),-2)':'if(gt(iw,ih),-2,min(640,ih))'" "/data/user/0/com.bipin.myapp/cache/Test-Video_16535454525974982000318197164476.mp4"


    


    Failure logs :

    


    2022-05-26 11:40:52.605 5308-9484/com.bipin.myapp D/[RxCachedThreadScheduler-11;FFmpegUtil#performVideoOperation:151]: Debug - performVideoOperation - Source File: Test-Video.mp4, size: 9.697972297668457 MBs
2022-05-26 11:40:52.605 5308-9484/com.bipin.myapp D/[RxCachedThreadScheduler-11;FFmpegUtil#performVideoOperation:159]: Debug - performVideoOperation - Command: -y -i "/storage/emulated/0/DCIM/Camera/Test-Video.mp4" -crf 19 -color_primaries 1 -color_trc 1 -colorspace 1 -vcodec h264 -acodec aac -ss 00:00:00 -t 00:00:15 -async 1 -vf "crop=540:539:0:0:exact=0 , scale='if(gt(iw,ih),min(640,iw),-2)':'if(gt(iw,ih),-2,min(640,ih))'" "/data/user/0/com.bipin.myapp/cache/Test-Video_16535454525974982000318197164476.mp4"
2022-05-26 11:40:52.607 5308-9484/com.bipin.myapp I/mobile-ffmpeg: Loading mobile-ffmpeg.
2022-05-26 11:40:52.617 5308-9484/com.bipin.myapp I/mobile-ffmpeg: Loaded mobile-ffmpeg-min-gpl-arm64-v8a-4.4-lts-20200724.
2022-05-26 11:40:52.619 5308-9485/com.bipin.myapp D/mobile-ffmpeg: Callback thread started.
2022-05-26 11:40:52.620 5308-9485/com.bipin.myapp I/mobile-ffmpeg: ffmpeg version v4.4-dev-416
2022-05-26 11:40:52.620 5308-9485/com.bipin.myapp I/mobile-ffmpeg:  Copyright (c) 2000-2020 the FFmpeg developers
2022-05-26 11:40:52.620 5308-9485/com.bipin.myapp I/mobile-ffmpeg: 
2022-05-26 11:40:52.620 5308-9485/com.bipin.myapp I/mobile-ffmpeg:   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)
2022-05-26 11:40:52.620 5308-9485/com.bipin.myapp I/mobile-ffmpeg:   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-android21-clang --cxx=aarch64-linux-android21-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-libx264 --enable-gpl --enable-libxvid --enable-gpl --enable-libx265 --enable-gpl --enable-libvidstab --enable-gpl --disable-sdl2 --enable-zlib --enable-mediacodec
2022-05-26 11:40:52.621 5308-9485/com.bipin.myapp I/mobile-ffmpeg:   libavutil      56. 55.100 / 56. 55.100
2022-05-26 11:40:52.621 5308-9485/com.bipin.myapp I/mobile-ffmpeg:   libavcodec     58. 96.100 / 58. 96.100
2022-05-26 11:40:52.621 5308-9485/com.bipin.myapp I/mobile-ffmpeg:   libavformat    58. 48.100 / 58. 48.100
2022-05-26 11:40:52.622 5308-9485/com.bipin.myapp I/mobile-ffmpeg:   libavdevice    58. 11.101 / 58. 11.101
2022-05-26 11:40:52.622 5308-9485/com.bipin.myapp I/mobile-ffmpeg:   libavfilter     7. 87.100 /  7. 87.100
2022-05-26 11:40:52.622 5308-9485/com.bipin.myapp I/mobile-ffmpeg:   libswscale      5.  8.100 /  5.  8.100
2022-05-26 11:40:52.622 5308-9485/com.bipin.myapp I/mobile-ffmpeg:   libswresample   3.  8.100 /  3.  8.100
2022-05-26 11:40:52.638 5308-5308/com.bipin.myapp D/InputMethodManager: startInputInner - Id : 0
2022-05-26 11:40:52.638 5308-5308/com.bipin.myapp I/InputMethodManager: startInputInner - mService.startInputOrWindowGainedFocus
2022-05-26 11:40:52.645 5308-9485/com.bipin.myapp I/mobile-ffmpeg: Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/DCIM/Camera/Test-Video.mp4':
2022-05-26 11:40:52.645 5308-9485/com.bipin.myapp I/mobile-ffmpeg:   Metadata:
2022-05-26 11:40:52.645 5308-9485/com.bipin.myapp I/mobile-ffmpeg:     major_brand     : 
2022-05-26 11:40:52.646 5308-9485/com.bipin.myapp I/mobile-ffmpeg: mp42
2022-05-26 11:40:52.646 5308-9485/com.bipin.myapp I/mobile-ffmpeg: 
2022-05-26 11:40:52.646 5308-9485/com.bipin.myapp I/mobile-ffmpeg:     minor_version   : 
2022-05-26 11:40:52.646 5308-9485/com.bipin.myapp I/mobile-ffmpeg: 1
2022-05-26 11:40:52.646 5308-9485/com.bipin.myapp I/mobile-ffmpeg: 
2022-05-26 11:40:52.646 5308-9485/com.bipin.myapp I/mobile-ffmpeg:     compatible_brands: 
2022-05-26 11:40:52.646 5308-9485/com.bipin.myapp I/mobile-ffmpeg: isommp41mp42
2022-05-26 11:40:52.646 5308-9485/com.bipin.myapp I/mobile-ffmpeg: 
2022-05-26 11:40:52.646 5308-9485/com.bipin.myapp I/mobile-ffmpeg:     creation_time   : 
2022-05-26 11:40:52.646 5308-9485/com.bipin.myapp I/mobile-ffmpeg: 2022-04-05T14:20:18.000000Z
2022-05-26 11:40:52.647 5308-9485/com.bipin.myapp I/mobile-ffmpeg: 
2022-05-26 11:40:52.647 5308-9485/com.bipin.myapp I/mobile-ffmpeg:   Duration: 
2022-05-26 11:40:52.647 5308-9485/com.bipin.myapp I/mobile-ffmpeg: 00:00:15.48
2022-05-26 11:40:52.647 5308-9485/com.bipin.myapp I/mobile-ffmpeg: , start: 
2022-05-26 11:40:52.647 5308-9485/com.bipin.myapp I/mobile-ffmpeg: 0.000000
2022-05-26 11:40:52.647 5308-9485/com.bipin.myapp I/mobile-ffmpeg: , bitrate: 
2022-05-26 11:40:52.647 5308-9485/com.bipin.myapp I/mobile-ffmpeg: 5255 kb/s
2022-05-26 11:40:52.647 5308-9485/com.bipin.myapp I/mobile-ffmpeg: 
2022-05-26 11:40:52.647 5308-9485/com.bipin.myapp I/mobile-ffmpeg:     Stream #0:0
2022-05-26 11:40:52.647 5308-9485/com.bipin.myapp I/mobile-ffmpeg: (und)
2022-05-26 11:40:52.647 5308-9485/com.bipin.myapp I/mobile-ffmpeg: : Video: h264 (avc1 / 0x31637661), yuv420p(tv, bt709), 540x960, 5251 kb/s
2022-05-26 11:40:52.647 5308-9485/com.bipin.myapp I/mobile-ffmpeg: , 
2022-05-26 11:40:52.647 5308-9485/com.bipin.myapp I/mobile-ffmpeg: 30.04 fps, 
2022-05-26 11:40:52.647 5308-9485/com.bipin.myapp I/mobile-ffmpeg: 30 tbr, 
2022-05-26 11:40:52.647 5308-9485/com.bipin.myapp I/mobile-ffmpeg: 600 tbn, 
2022-05-26 11:40:52.647 5308-9485/com.bipin.myapp I/mobile-ffmpeg: 1200 tbc
2022-05-26 11:40:52.647 5308-9485/com.bipin.myapp I/mobile-ffmpeg:  (default)
2022-05-26 11:40:52.648 5308-9485/com.bipin.myapp I/mobile-ffmpeg: 
2022-05-26 11:40:52.648 5308-9485/com.bipin.myapp I/mobile-ffmpeg:     Metadata:
2022-05-26 11:40:52.648 5308-9485/com.bipin.myapp I/mobile-ffmpeg:       creation_time   : 
2022-05-26 11:40:52.648 5308-9485/com.bipin.myapp I/mobile-ffmpeg: 2022-04-05T14:20:18.000000Z
2022-05-26 11:40:52.648 5308-9485/com.bipin.myapp I/mobile-ffmpeg: 
2022-05-26 11:40:52.648 5308-9485/com.bipin.myapp I/mobile-ffmpeg:       handler_name    : 
2022-05-26 11:40:52.648 5308-9485/com.bipin.myapp I/mobile-ffmpeg: Core Media Video
2022-05-26 11:40:52.648 5308-9485/com.bipin.myapp I/mobile-ffmpeg: 
2022-05-26 11:40:52.648 5308-9485/com.bipin.myapp I/mobile-ffmpeg: Stream mapping:
2022-05-26 11:40:52.648 5308-9485/com.bipin.myapp I/mobile-ffmpeg:   Stream #0:0 -> #0:0
2022-05-26 11:40:52.648 5308-9485/com.bipin.myapp I/mobile-ffmpeg:  (h264 (native) -> h264 (libx264))
2022-05-26 11:40:52.648 5308-9485/com.bipin.myapp I/mobile-ffmpeg: 
2022-05-26 11:40:52.648 5308-9485/com.bipin.myapp I/mobile-ffmpeg: Press [q] to stop, [?] for help
2022-05-26 11:40:52.673 5308-9485/com.bipin.myapp W/mobile-ffmpeg: [graph 0 input from stream 0:0 @ 0xb400007bf58e0ed0] sws_param option is deprecated and ignored
2022-05-26 11:40:52.674 5308-9485/com.bipin.myapp I/mobile-ffmpeg: [libx264 @ 0xb400007c65974720] using cpu capabilities: ARMv8 NEON
2022-05-26 11:40:52.678 5308-9485/com.bipin.myapp I/mobile-ffmpeg: [libx264 @ 0xb400007c65974720] profile High, level 3.0, 4:2:0, 8-bit
2022-05-26 11:40:52.678 5308-9485/com.bipin.myapp I/mobile-ffmpeg: [libx264 @ 0xb400007c65974720] 264 - core 160 - H.264/MPEG-4 AVC codec - Copyleft 2003-2020 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=19.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
2022-05-26 11:40:52.678 5308-9485/com.bipin.myapp I/mobile-ffmpeg: Output #0, mp4, to '/data/user/0/com.bipin.myapp/cache/Test-Video_16535454525974982000318197164476.mp4':
2022-05-26 11:40:52.678 5308-9485/com.bipin.myapp I/mobile-ffmpeg:   Metadata:
2022-05-26 11:40:52.678 5308-9485/com.bipin.myapp I/mobile-ffmpeg:     major_brand     : 
2022-05-26 11:40:52.678 5308-9485/com.bipin.myapp I/mobile-ffmpeg: mp42
2022-05-26 11:40:52.678 5308-9485/com.bipin.myapp I/mobile-ffmpeg: 
2022-05-26 11:40:52.678 5308-9485/com.bipin.myapp I/mobile-ffmpeg:     minor_version   : 
2022-05-26 11:40:52.678 5308-9485/com.bipin.myapp I/mobile-ffmpeg: 1
2022-05-26 11:40:52.679 5308-9485/com.bipin.myapp I/mobile-ffmpeg: 
2022-05-26 11:40:52.679 5308-9485/com.bipin.myapp I/mobile-ffmpeg:     compatible_brands: 
2022-05-26 11:40:52.679 5308-9485/com.bipin.myapp I/mobile-ffmpeg: isommp41mp42
2022-05-26 11:40:52.679 5308-9485/com.bipin.myapp I/mobile-ffmpeg: 
2022-05-26 11:40:52.679 5308-9485/com.bipin.myapp I/mobile-ffmpeg:     encoder         : 
2022-05-26 11:40:52.679 5308-9485/com.bipin.myapp I/mobile-ffmpeg: Lavf58.48.100
2022-05-26 11:40:52.679 5308-9485/com.bipin.myapp I/mobile-ffmpeg: 
2022-05-26 11:40:52.679 5308-9485/com.bipin.myapp I/mobile-ffmpeg:     Stream #0:0
2022-05-26 11:40:52.679 5308-9485/com.bipin.myapp I/mobile-ffmpeg: (und)
2022-05-26 11:40:52.679 5308-9485/com.bipin.myapp I/mobile-ffmpeg: : Video: h264 (libx264) (avc1 / 0x31637661), yuv420p(bt709), 540x538, q=-1--1
2022-05-26 11:40:52.679 5308-9485/com.bipin.myapp I/mobile-ffmpeg: , 
2022-05-26 11:40:52.680 5308-9485/com.bipin.myapp I/mobile-ffmpeg: 30 fps, 
2022-05-26 11:40:52.680 5308-9485/com.bipin.myapp I/mobile-ffmpeg: 15360 tbn, 
2022-05-26 11:40:52.680 5308-9485/com.bipin.myapp I/mobile-ffmpeg: 30 tbc
2022-05-26 11:40:52.680 5308-9485/com.bipin.myapp I/mobile-ffmpeg:  (default)
2022-05-26 11:40:52.680 5308-9485/com.bipin.myapp I/mobile-ffmpeg: 
2022-05-26 11:40:52.680 5308-9485/com.bipin.myapp I/mobile-ffmpeg:     Metadata:
2022-05-26 11:40:52.680 5308-9485/com.bipin.myapp I/mobile-ffmpeg:       creation_time   : 
2022-05-26 11:40:52.680 5308-9485/com.bipin.myapp I/mobile-ffmpeg: 2022-04-05T14:20:18.000000Z
2022-05-26 11:40:52.680 5308-9485/com.bipin.myapp I/mobile-ffmpeg: 
2022-05-26 11:40:52.680 5308-9485/com.bipin.myapp I/mobile-ffmpeg:       handler_name    : 
2022-05-26 11:40:52.680 5308-9485/com.bipin.myapp I/mobile-ffmpeg: Core Media Video
2022-05-26 11:40:52.680 5308-9485/com.bipin.myapp I/mobile-ffmpeg: 
2022-05-26 11:40:52.680 5308-9485/com.bipin.myapp I/mobile-ffmpeg:       encoder         : 
2022-05-26 11:40:52.680 5308-9485/com.bipin.myapp I/mobile-ffmpeg: Lavc58.96.100 libx264
2022-05-26 11:40:52.681 5308-9485/com.bipin.myapp I/mobile-ffmpeg: 
2022-05-26 11:40:52.681 5308-9485/com.bipin.myapp I/mobile-ffmpeg:     Side data:
2022-05-26 11:40:52.681 5308-9485/com.bipin.myapp I/mobile-ffmpeg:       
2022-05-26 11:40:52.681 5308-9485/com.bipin.myapp I/mobile-ffmpeg: cpb: 
2022-05-26 11:40:52.682 5308-9485/com.bipin.myapp I/mobile-ffmpeg: bitrate max/min/avg: 0/0/0 buffer size: 0 
2022-05-26 11:40:52.684 5308-9485/com.bipin.myapp I/mobile-ffmpeg: vbv_delay: N/A
2022-05-26 11:40:52.684 5308-9485/com.bipin.myapp I/mobile-ffmpeg: 
2022-05-26 11:40:52.797 5308-5308/com.bipin.myapp D/[main;BaseDaggerFragment#onDestroyView:90]: Debug - PostMediaTabFragment onDestroyView called
2022-05-26 11:40:52.798 5308-5308/com.bipin.myapp D/[main;ViewBindingBaseFragment#onDestroyView:32]: Debug - PostMediaTabFragment onDestroyView called
2022-05-26 11:40:52.895 5308-9521/com.bipin.myapp A/libc: Fatal signal 11 (SIGSEGV), code 2 (SEGV_ACCERR), fault addr 0xb400007a53e6d000 in tid 9521 (RxCachedThreadS), pid 5308 (com.bipin.myapp)
2022-05-26 11:40:54.302 9524-9524/? A/DEBUG: Cmdline: com.bipin.myapp
2022-05-26 11:40:54.302 9524-9524/? A/DEBUG: pid: 5308, tid: 9521, name: RxCachedThreadS  >>> com.bipin.myapp <<<
2022-05-26 11:40:54.302 9524-9524/? A/DEBUG:       #00 pc 000000000058b8d0  /data/app/~~QE7_ItG7A3ZSxt4PIZf-2w==/com.bipin.myapp-o6_afbhi9zItP6DEnUAd6w==/base.apk!libavcodec.so
2022-05-26 11:40:54.398 1189-1447/? W/ActivityManager: Missing app error report, app = com.bipin.myapp crashing = true notResponding = false
2022-05-26 11:40:54.407 1189-9530/? W/ActivityManager: crash : com.bipin.myapp,10342


    


  • How to send libmmpeg AVPacket through WebRTC (using libdatachannel)

    29 mars 2022, par mike

    I'm encoding a video frame with the ffmpeg libraries, generating an AVPacket with compressed data.

    


    Thanks to some recent advice here on S/O, I am trying to send that frame over a network using the WebRTC library libdatachannel, specifically by adapting the example here :

    


    https://github.com/paullouisageneau/libdatachannel/tree/master/examples/streamer

    


    I am seeing problems inside h264rtppacketizer.cpp (part of the library, not the example) which are almost certainly to do with how I'm providing the sample data.
(I don't think that this is anything to do with libdatachannel specifically, it will be an issue with what I'm sending)

    


    The example code reads each encoded frame from a file, and populates a sample by setting the content of the file to the contents of the file :

    


    sample = *reinterpret_cast *>(&fileContents);

    


    sample is just a std::vector<byte>;</byte>

    &#xA;

    I have naively copied the contents of an AVPacket->data pointer into the sample vector :

    &#xA;

    sample.resize(pkt->size);&#xA;memcpy(sample.data(), pkt->data, pkt->size * sizeof(std::byte));    &#xA;

    &#xA;

    but the packetizer is falling over when trying to get length values out of that data.&#xA;Specifically, in the following code, the first iteration gets a length of 1, but the second, looking up index 5, gives 1119887324. This is way too big for my data, which is only 3526 bytes (the whole frame is a single colour so likely to be small once encoded) :

    &#xA;

    while (index &lt; message->size()) {&#xA;assert(index &#x2B; 4 &lt; message->size());&#xA;auto lengthPtr = (uint32_t *)(message->data() &#x2B; index);&#xA;uint32_t length = ntohl(*lengthPtr);&#xA;auto naluStartIndex = index &#x2B; 4;&#xA;auto naluEndIndex = naluStartIndex &#x2B; length;&#xA;assert(naluEndIndex &lt;= message->size());    &#xA;        &#xA;auto begin = message->begin() &#x2B; naluStartIndex;&#xA;auto end = message->begin() &#x2B; naluEndIndex;&#xA;nalus->push_back(std::make_shared<nalunit>(begin, end));&#xA;index = naluEndIndex;&#xA;}&#xA;</nalunit>

    &#xA;

    Here is a dump of

    &#xA;

    uint32_t length = ntohl(*lengthPtr);&#xA;

    &#xA;

    for the first few elements of the message (*lengthPtr in parentheses) :

    &#xA;

    [2022-03-29 15:12:01.182] [info] index 0: 1  (16777216)&#xA;[2022-03-29 15:12:01.183] [info] index 1: 359  (1728118784)&#xA;[2022-03-29 15:12:01.184] [info] index 2: 91970  (1114046720)&#xA;[2022-03-29 15:12:01.186] [info] index 3: 23544512  (3225577217)&#xA;[2022-03-29 15:12:01.186] [info] index 4: 1732427807  (532693607)&#xA;[2022-03-29 15:12:01.187] [info] index 5: 1119887324  (3693068354)&#xA;[2022-03-29 15:12:01.188] [info] index 6: 3223313413  (98312128)&#xA;[2022-03-29 15:12:01.188] [info] index 7: 534512896  (384031)&#xA;[2022-03-29 15:12:01.188] [info] index 8: 3691315291  (1526728156)&#xA;[2022-03-29 15:12:01.189] [info] index 9: 83909537  (2707095557)&#xA;[2022-03-29 15:12:01.189] [info] index 10: 6004992  (10574592)&#xA;[2022-03-29 15:12:01.190] [info] index 11: 1537277952  (41307)&#xA;[2022-03-29 15:12:01.190] [info] index 12: 2701131779  (50331809)&#xA;[2022-03-29 15:12:01.192] [info] index 13: 768  (196608)&#xA;

    &#xA;

    (I know I should post a complete sample, I am working on it)

    &#xA;

      &#xA;

    • I am fairly sure I am just missing something basic. E.g. am I supposed to do something with the AVPacket side_data, does AVPacket have or miss some header info ?

      &#xA;

      • &#xA;

    • If I just fwrite the pkt->data for a single frame to disk, I can read the codec information with ffprobe :

      &#xA;

      • &#xA;

    &#xA;

    Input #0, h264, from &#x27;encodedOut.h264&#x27;:&#xA;Duration: N/A, bitrate: N/A&#xA;Stream #0:0: Video: h264 (Constrained Baseline), yuv420p(progressive), 1280x720, 30 tbr, 1200k tbn&#xA;

    &#xA;

      &#xA;
    • whereas the same for the example input files (again a single frame) gives the following :

      • &#xA;

    &#xA;

    [h264 @ 000001c88d1135c0] Format h264 detected only with low score of 1, misdetection possible!&#xA;[h264 @ 000001c88f337400] missing picture in access unit with size 85306&#xA;[extract_extradata @ 000001c88d11ee40] No start code is found.&#xA;sample-0.h264: Invalid data found when processing input&#xA;

    &#xA;

  • FFMPEG audio not delaying properly

    1er avril 2022, par Spartan 117

    I am trying to mix two audio files together, with one audio being delayed. Here are the file details

    &#xA;

    Audio 1 - https://pastebin.com/vkYsH88e, "startTime" : "03/23/2022 21:20:27", "endTime" : "03/24/2022 01:06:11"

    &#xA;

    Audio 2 - https://pastebin.com/Gs4V96GQ, "startTime" : "03/24/2022 01:05:30", "endTime" : "03/24/2022 04:21:41"

    &#xA;

    As you can see from the paste bin and the json property, Audio two starts about 3 hours and 45 minutes after Audio one, here is how i am trying to mix them

    &#xA;

    ffmpeg -i RTb295d0534191e1acb22a45bb971a12e6.mka -i RT103bfe5f4b129860f69cd8e820f3a10b.mka -filter_complex "[1:a]adelay=13500s:all=1[apad]; [0:a][apad]amix=inputs=2:weights=1|1[aout]" -map [aout] combined_audio.mka&#xA;

    &#xA;

    Here is the output of that mixture - https://pastebin.com/KAsw0905

    &#xA;

    Files have been uploaded here, if anyone wants to test - https://easyupload.io/m/xveng4

    &#xA;

    The issue i'm having ? Based on the parameters provided, the 2nd audio file should start playing after 3 hours and 45 minutes. Instead, it plays after 5 hours and 45 minutes. I'm new to FFMPEG and have been having trouble figuring this out. Any ideas ?

    &#xA;

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