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Autres articles (98)
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Sur d’autres sites (8079)
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FFmpeg "Non-monotonous DTS in output stream" error when processing video from Safari's MediaRecorder
17 juillet 2024, par HackermonI'm recording a video stream in Safari with
MediaRecorder, then sending it to a remote server which then uses ffmpeg to reencode the video. When reencoding with FFmpeg, I get a lot of warnings and the final video is broken, frame are glitching and out of sync but the audio sounds fine.

Here's my MediaRecorder script :


const camera = await navigator.mediaDevices.getUserMedia({ audio: true, video: true });
const recorder = new MediaRecorder(camera, {
 mimeType: 'video/mp4', // Safari only supports MP4
 bitsPerSecond: 1_000_000,
});

recorder.ondataavailable = async ({ data: blob }) => {
 // open contents in new tab
 var fileURL = URL.createObjectURL(file);
 window.open(fileURL, '_blank');
};

recorder.start();
setTimeout(() => recorder.stop(), 5000);


I download the video blob from Safari and use this command to reencode it :


ffmpeg -i ./blob.mp4 -preset ultrafast -strict -2 -threads 10 -c copy ./output.mp4


Logs :


ffmpeg version 4.2.7-0ubuntu0.1 Copyright (c) 2000-2022 the FFmpeg developers
 built with gcc 9 (Ubuntu 9.4.0-1ubuntu1~20.04.1)
 configuration: --prefix=/usr --extra-version=0ubuntu0.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-nvenc --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
 libavutil 56. 31.100 / 56. 31.100
 libavcodec 58. 54.100 / 58. 54.100
 libavformat 58. 29.100 / 58. 29.100
 libavdevice 58. 8.100 / 58. 8.100
 libavfilter 7. 57.100 / 7. 57.100
 libavresample 4. 0. 0 / 4. 0. 0
 libswscale 5. 5.100 / 5. 5.100
 libswresample 3. 5.100 / 3. 5.100
 libpostproc 55. 5.100 / 55. 5.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x559826616000] DTS 29 < 313 out of order
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from './chunk1.mp4':
 Metadata:
 major_brand : iso5
 minor_version : 1
 compatible_brands: isomiso5hlsf
 creation_time : 2024-07-17T14:30:47.000000Z
 Duration: 00:00:01.00, start: 0.000000, bitrate: 3937 kb/s
 Stream #0:0(und): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p(progressive), 640x480 [SAR 1:1 DAR 4:3], 6218 kb/s, 33.36 fps, 600 tbr, 600 tbn, 1200 tbc (default)
 Metadata:
 creation_time : 2024-07-17T14:30:47.000000Z
 handler_name : Core Media Video
 Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 420 kb/s (default)
 Metadata:
 creation_time : 2024-07-17T14:30:47.000000Z
 handler_name : Core Media Audio
File './safari3.mp4' already exists. Overwrite ? [y/N] Output #0, mp4, to './safari3.mp4':
 Metadata:
 major_brand : iso5
 minor_version : 1
 compatible_brands: isomiso5hlsf
 encoder : Lavf58.29.100
 Stream #0:0(und): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p(progressive), 640x480 [SAR 1:1 DAR 4:3], q=2-31, 6218 kb/s, 33.36 fps, 600 tbr, 19200 tbn, 600 tbc (default)
 Metadata:
 creation_time : 2024-07-17T14:30:47.000000Z
 handler_name : Core Media Video
 Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 420 kb/s (default)
 Metadata:
 creation_time : 2024-07-17T14:30:47.000000Z
 handler_name : Core Media Audio
Stream mapping:
 Stream #0:0 -> #0:0 (copy)
 Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
[mp4 @ 0x559826644340] Non-monotonous DTS in output stream 0:0; previous: 10016, current: 928; changing to 10017. This may result in incorrect timestamps in the output file.
[mp4 @ 0x559826644340] Non-monotonous DTS in output stream 0:0; previous: 10017, current: 1568; changing to 10018. This may result in incorrect timestamps in the output file.
[mp4 @ 0x559826644340] Non-monotonous DTS in output stream 0:0; previous: 10018, current: 2208; changing to 10019. This may result in incorrect timestamps in the output file.
...x100
frame= 126 fps=0.0 q=-1.0 Lsize= 479kB time=00:00:00.97 bitrate=4026.2kbits/s speed= 130x 
video:425kB audio:51kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.652696%


Not sure what's happening or how to fix it. This issue only happens in Safari, videos from Chrome are perfectly fine.


I've tried various flags :


-fflags +igndts
-bsf:a aac_adtstoasc
-c:v libvpx-vp9 -c:a libopus
etc


None of them seem to fix the issue.


-
Flutter error in Ffmpeg, "Unhandled Exception : ProcessException : No such file or directory" in macOS desktop version
19 avril 2024, par pratik vekariyaI'm trying video trim video using ffmpeg, for macOS desktop application.


I have downloaded ffmpeg from here for macOS.


Here is my code


String mainPath = 'Users/apple/Workspace/User/2024/Project/videoapp/build/macos/Build/Products/Debug/';
 mainPath = mainPath.substring(0, mainPath.lastIndexOf("/"));
 
 Directory directoryExe3 = Directory("$mainPath");
 var dbPath = path.join(directoryExe3.path,
 "App.framework/Resources/flutter_assets/assets/ffmpeg/ffmpegmacos");
//here in "Products/Debug/" folder desktop app will generate

//directoryExe3 path will be, Users/apple/Workspace/User/2024/Project/videoapp/build/macos/Build/Products/Debug

//and dbPath will be, Users/apple/Workspace/User/2024/Project/videoapp/build/macos/Build/Products/Debug/App.framework/Resources/flutter_assets/assets/ffmpeg/ffmpegmacos

//so when app will run it can access it from this path

//executable code, command for ffmpeg

String transpose_str += "crop=" +
 out_w.toInt().toString() +
 ":" +
 out_h.toInt().toString() +
 ":" +
 x!.toInt().toString() +
 ":" +
 y!.toInt().toString() +
 ",";
 transpose_str += "scale=960:192";

Future<processresult> result_ = Process.run(dbPath, [
 "-ss",
 timestamp,
 "-i",
 inputFilePath,
 "-t",
 endTime,
 "-vf",
 transpose_str,
 "-an",
 "./temp.mp4",
 ]); 
</processresult>

Now when I run this in macOS desktop verison, it gives me error at Process.run that in dbPath, Unhandled Exception : ProcessException : No such file or directory.


Any help would be appreciate !


when i run this as desktop version it should get file from assets.


-
java.io.IOException : Cannot run program "/data/user/0/com.voi.myapplication8/files/ffmpeg" : error=13, Permission denied
1er avril 2024, par Harsha

java.io.IOException : Cannot run program
"/data/user/0/com.voi.myapplication8/files/ffmpeg" : error=13,
Permission denied




I am using this dependencies
implementation 'com.writingminds:FFmpegAndroid:0.3.2'




2024-03-31 21:40:31.045 15937-16762 FFmpeg

com.voi.myapplication8 E Exception while trying to run :
[Ljava.lang.String ;@71d4c0f
java.io.IOException : Cannot run program
"/data/user/0/com.voi.myapplication8/files/ffmpeg" : error=13,
Permission denied
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1050)
at java.lang.Runtime.exec(Runtime.java:712)
at java.lang.Runtime.exec(Runtime.java:571)
at
com.github.hiteshsondhi88.libffmpeg.ShellCommand.run(ShellCommand.java:10)
at
com.github.hiteshsondhi88.libffmpeg.FFmpegExecuteAsyncTask.doInBackground(FFmpegExecuteAsyncTask.java:38)
at
com.github.hiteshsondhi88.libffmpeg.FFmpegExecuteAsyncTask.doInBackground(FFmpegExecuteAsyncTask.java:10)
at android.os.AsyncTask$3.call(AsyncTask.java:394)
at java.util.concurrent.FutureTask.run(FutureTask.java:264)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:305)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:644)
at java.lang.Thread.run(Thread.java:1012)
Caused by : java.io.IOException : error=13, Permission denied
at java.lang.UNIXProcess.forkAndExec(Native Method)
at java.lang.UNIXProcess.(UNIXProcess.java:133)
at java.lang.ProcessImpl.start(ProcessImpl.java:141)
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029)
at java.lang.Runtime.exec(Runtime.java:712) 
at java.lang.Runtime.exec(Runtime.java:571) 
at
com.github.hiteshsondhi88.libffmpeg.ShellCommand.run(ShellCommand.java:10) 
at
com.github.hiteshsondhi88.libffmpeg.FFmpegExecuteAsyncTask.doInBackground(FFmpegExecuteAsyncTask.java:38) 
at
com.github.hiteshsondhi88.libffmpeg.FFmpegExecuteAsyncTask.doInBackground(FFmpegExecuteAsyncTask.java:10) 
at android.os.AsyncTask$3.call(AsyncTask.java:394) 
at java.util.concurrent.FutureTask.run(FutureTask.java:264) 
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:305) 
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) 
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:644) 
at java.lang.Thread.run(Thread.java:1012) 2024-03-31 21:40:31.045
15937-15937 FFmpeg com.voi.myapplication8

E Video cropping failed :



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