Super User Asked by Abhijit Rajmane on December 17, 2020
I’m trying to mix two audio files using flutter_ffmpeg: 0.2.10 but I get
[NULL @ 0xd77d4400] Unable to find a suitable output format for 'ffmpeg'
I/flutter (29205): ffmpeg: Invalid argument
code :
String file1= _localPath+"/file1.m4a";
String file2= _localPath+"/file2.mp3";
String output= _localPath+"/abhijit.wav";
String finalPath= "ffmpeg -i "+ file1 +" -i "+file2+" -filter_complex amix=inputs=2:duration=first:dropout_transition=0 "+output;
console ffmpeg's message...
I/flutter (29205): libavutil 56. 38.100 / 56. 38.100
I/flutter (29205): libavcodec 58. 65.102 / 58. 65.102
I/flutter (29205): libavformat 58. 35.101 / 58. 35.101
I/flutter (29205): libavdevice 58. 9.103 / 58. 9.103
I/flutter (29205): libavfilter 7. 70.101 / 7. 70.101
I/flutter (29205): libswscale 5. 6.100 / 5. 6.100
I/flutter (29205): libswresample 3. 6.100 / 3. 6.100
I/flutter (29205): Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/Android/data/com.arthenica.flutter.ffmpeg.FlutterFFmpegExample/files/Download/file1.m4a':
I/flutter (29205): Metadata:
I/flutter (29205): major_brand : mp42
I/flutter (29205): minor_version : 1
I/flutter (29205): compatible_brands: isommp41mp42
I/flutter (29205): creation_time : 2020-07-09T15:42:47.000000Z
I/flutter (29205): Duration: 00:12:12.26, start: 0.000000, bitrate: 61 kb/s
I/flutter (29205): Stream #0:0(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 60 kb/s (default)
I/flutter (29205): Metadata:
I/flutter (29205): creation_time : 2020-07-09T15:42:47.000000Z
I/flutter (29205): handler_name : Core Media Audio
I/flutter (29205): Input #1, mp3, from '/storage/emulated/0/Android/data/com.arthenica.flutter.ffmpeg.FlutterFFmpegExample/files/Download/file2.mp3':
I/flutter (29205): Metadata:
I/flutter (29205): artist : SoundHelix
I/flutter (29205): genre : Techno
I/flutter (29205): encoder : Lavf58.20.100
I/flutter (29205): Duration: 00:00:23.12, start: 0.011995, bitrate: 192 kb/s
I/flutter (29205): Stream #1:0: Audio: mp3, 44100 Hz, stereo, fltp, 192 kb/s
I/flutter (29205): Metadata:
I/flutter (29205): encoder : Lavf
I/flutter (29205): [NULL @ 0xd77d4400] Unable to find a suitable output format for 'ffmpeg'
I/flutter (29205): ffmpeg: Invalid argument
I/flutter (29205): "
I/flutter (29205): New FFmpeg pipe: /data/user/0/com.arthenica.flutter.ffmpeg.FlutterFFmpegExample/cache/mf_pipe_7
I/flutter (29205): FFmpeg process exited with rc 1
Please check command of FFmpeg and suggest me if any correction occur
Remove ffmpeg from the begining.
String finalPath= "-i "+ file1 +" -i "+file2+" -filter_complex amix=inputs=2:duration=first:dropout_transition=0 "+output;
Answered by Dhanuka Perera on December 17, 2020
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