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Les formats acceptés
28 janvier 2010, parLes commandes suivantes permettent d’avoir des informations sur les formats et codecs gérés par l’installation local de ffmpeg :
ffmpeg -codecs ffmpeg -formats
Les format videos acceptés en entrée
Cette liste est non exhaustive, elle met en exergue les principaux formats utilisés : h264 : H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 m4v : raw MPEG-4 video format flv : Flash Video (FLV) / Sorenson Spark / Sorenson H.263 Theora wmv :
Les formats vidéos de sortie possibles
Dans un premier temps on (...) -
Création définitive du canal
12 mars 2010, parLorsque votre demande est validée, vous pouvez alors procéder à la création proprement dite du canal. Chaque canal est un site à part entière placé sous votre responsabilité. Les administrateurs de la plateforme n’y ont aucun accès.
A la validation, vous recevez un email vous invitant donc à créer votre canal.
Pour ce faire il vous suffit de vous rendre à son adresse, dans notre exemple "http://votre_sous_domaine.mediaspip.net".
A ce moment là un mot de passe vous est demandé, il vous suffit d’y (...) -
Selection of projects using MediaSPIP
2 mai 2011, parThe examples below are representative elements of MediaSPIP specific uses for specific projects.
MediaSPIP farm @ Infini
The non profit organizationInfini develops hospitality activities, internet access point, training, realizing innovative projects in the field of information and communication technologies and Communication, and hosting of websites. It plays a unique and prominent role in the Brest (France) area, at the national level, among the half-dozen such association. Its members (...)
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Merging two audio files in Android using FFMPEG
3 août 2016, par JeremyI’m working on an application that takes two audio files, and merges them into the respected channels. The way they are being equalized are not as good as I had hoped, So I want to adjust the volume of each file during the mixing phase. I’ve seen a couple of examples online, like this, this, and
[this][3]
.. but none of them are working for me. Can someone direct me in the right direction with this ? Much appreciation !I am using this library to execute : https://github.com/WritingMinds/ffmpeg-android-java
Here is my code (EDIT)
String files = "-i " + mVoiceFile.getAbsolutePath() + " -i " + mBeatFile.getAbsolutePath();
String filter = "-filter_complex [0:a]volume=0.99[a1];[1:a]volume=0.3[a2][a1][a2]amerge=inputs=2,volume=1.3,pan=stereo|c0code>enter code here
and here are my errors from running.
04-06 12:17:34.079 30975-30975/me.rapchat.rapchat E/Studio Process: WARNING: linker: /data/user/0/me.rapchat.rapchat/files/ffmpeg has text relocations. This is wasting memory and prevents security hardening. Please fix.
04-06 12:17:34.306 30975-30975/me.rapchat.rapchat E/Studio Process: ffmpeg version n2.4.2 Copyright (c) 2000-2014 the FFmpeg developers
04-06 12:17:34.306 30975-30975/me.rapchat.rapchat E/Studio Process: built on Oct 7 2014 15:08:46 with gcc 4.8 (GCC)
04-06 12:17:34.306 30975-30975/me.rapchat.rapchat E/Studio Process: configuration: --target-os=linux --cross-prefix=/home/sb/Source-Code/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/sb/Source-Code/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/sb/Source-Code/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/sb/Source-Code/ffmpeg-android/build/armeabi-v7a-neon --extra-cflags='-I/home/sb/Source-Code/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all -mfpu=neon' --extra-ldflags='-L/home/sb/Source-Code/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
04-06 12:17:34.307 30975-30975/me.rapchat.rapchat E/Studio Process: libavutil 54. 7.100 / 54. 7.100
04-06 12:17:34.307 30975-30975/me.rapchat.rapchat E/Studio Process: libavcodec 56. 1.100 / 56. 1.100
04-06 12:17:34.307 30975-30975/me.rapchat.rapchat E/Studio Process: libavformat 56. 4.101 / 56. 4.101
04-06 12:17:34.307 30975-30975/me.rapchat.rapchat E/Studio Process: libavdevice 56. 0.100 / 56. 0.100
04-06 12:17:34.308 30975-30975/me.rapchat.rapchat E/Studio Process: libavfilter 5. 1.100 / 5. 1.100
04-06 12:17:34.308 30975-30975/me.rapchat.rapchat E/Studio Process: libswscale 3. 0.100 / 3. 0.100
04-06 12:17:34.308 30975-30975/me.rapchat.rapchat E/Studio Process: libswresample 1. 1.100 / 1. 1.100
04-06 12:17:34.308 30975-30975/me.rapchat.rapchat E/Studio Process: libpostproc 53. 0.100 / 53. 0.100
04-06 12:17:34.372 30975-30975/me.rapchat.rapchat E/Studio Process: Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/data/user/0/me.rapchat.rapchat/cache/recording.m4a':
04-06 12:17:34.373 30975-30975/me.rapchat.rapchat E/Studio Process: Metadata:
04-06 12:17:34.373 30975-30975/me.rapchat.rapchat E/Studio Process: major_brand : mp42
04-06 12:17:34.373 30975-30975/me.rapchat.rapchat E/Studio Process: minor_version : 0
04-06 12:17:34.374 30975-30975/me.rapchat.rapchat E/Studio Process: compatible_brands: isommp42
04-06 12:17:34.374 30975-30975/me.rapchat.rapchat E/Studio Process: creation_time : 2016-04-06 19:17:33
04-06 12:17:34.374 30975-30975/me.rapchat.rapchat E/Studio Process: Duration: 00:00:01.56, start: 0.000000, bitrate: 144 kb/s
04-06 12:17:34.375 30975-30975/me.rapchat.rapchat E/Studio Process: Stream #0:0(eng): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 128 kb/s (default)
04-06 12:17:34.375 30975-30975/me.rapchat.rapchat E/Studio Process: Metadata:
04-06 12:17:34.375 30975-30975/me.rapchat.rapchat E/Studio Process: creation_time : 2016-04-06 19:17:33
04-06 12:17:34.375 30975-30975/me.rapchat.rapchat E/Studio Process: handler_name : SoundHandle
04-06 12:17:34.401 30975-30975/me.rapchat.rapchat E/Studio Process: Input #1, mov,mp4,m4a,3gp,3g2,mj2, from '/data/user/0/me.rapchat.rapchat/cache/beats/d3c37d60-ed50-4c00-b454-4e399a7858ff.m4a':
04-06 12:17:34.401 30975-30975/me.rapchat.rapchat E/Studio Process: Metadata:
04-06 12:17:34.401 30975-30975/me.rapchat.rapchat E/Studio Process: major_brand : mp42
04-06 12:17:34.401 30975-30975/me.rapchat.rapchat E/Studio Process: minor_version : 0
04-06 12:17:34.401 30975-30975/me.rapchat.rapchat E/Studio Process: compatible_brands: mp42isom
04-06 12:17:34.401 30975-30975/me.rapchat.rapchat E/Studio Process: creation_time : 1993-11-24 14:46:42
04-06 12:17:34.401 30975-30975/me.rapchat.rapchat E/Studio Process: encoder : Max 0.9.1
04-06 12:17:34.401 30975-30975/me.rapchat.rapchat E/Studio Process: iTunSMPB : 00000000 00000840 000003c0 000000000035dc00 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
04-06 12:17:34.401 30975-30975/me.rapchat.rapchat E/Studio Process: date : 2015
04-06 12:17:34.401 30975-30975/me.rapchat.rapchat E/Studio Process: Duration: 00:01:20.04, start: 0.047891, bitrate: 129 kb/s
04-06 12:17:34.402 30975-30975/me.rapchat.rapchat E/Studio Process: Stream #1:0(eng): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 127 kb/s (default)
04-06 12:17:34.402 30975-30975/me.rapchat.rapchat E/Studio Process: Metadata:
04-06 12:17:34.402 30975-30975/me.rapchat.rapchat E/Studio Process: creation_time : 1993-11-24 14:46:42
04-06 12:17:34.404 30975-30975/me.rapchat.rapchat E/Studio Process: [NULL @ 0xb5e4fc00] Unable to find a suitable output format for '[a1][a2]amerge,pan=stereo|c0me.rapchat.rapchat E/Studio Process: [a1][a2]amerge,pan=stereo|c0me.rapchat.rapchat E/Studio Status Failed: WARNING: linker: /data/user/0/me.rapchat.rapchat/files/ffmpeg has text relocations. This is wasting memory and prevents security hardening. Please fix.
ffmpeg version n2.4.2 Copyright (c) 2000-2014 the FFmpeg developers
built on Oct 7 2014 15:08:46 with gcc 4.8 (GCC)
configuration: --target-os=linux --cross-prefix=/home/sb/Source-Code/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/sb/Source-Code/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/sb/Source-Code/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/sb/Source-Code/ffmpeg-android/build/armeabi-v7a-neon --extra-cflags='-I/home/sb/Source-Code/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all -mfpu=neon' --extra-ldflags='-L/home/sb/Source-Code/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
libavutil 54. 7.100 / 54. 7.100
libavcodec 56. 1.100 / 56. 1.100
libavformat 56. 4.101 / 56. 4.101
libavdevice 56. 0.100 / 56. 0.100
libavfilter 5. 1.100 / 5. 1.100
libswscale 3. 0.100 / 3. 0.100
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 0.100 / 53. 0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/data/user/0/me.rapchat.rapchat/cache/recording.m4a':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isommp42
creation_time : 2016-04-06 19:17:33
Duration: 00:00:01.56, start: 0.000000, bitrate: 144 kb/s
Stream #0:0(eng): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 128 kb/s (default)
Metadata:
creation_time : 2016-04-06 19:17:33
handler_name : SoundHandle
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from '/data/user/0/me.rapchat.rapchat/cache/beats/d3c37d60-ed50-4c00-b454-4e399a7858ff.m4a':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: mp42isom
creation_time : 1993-11-24 14:46:42
encoder : Max 0.9.1
iTunSMPB : 00000000 00000840 000003c0 000000000035dc00 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
date : 2015
Duration: 00:01:20.04, start: 0.047891, bitrate: 129 kb/s
Stream #1:0(eng): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 127 kb/s (default)
Metadata:
creation_time : 1993-11-24 14:46:42
[NULL @ 0xb5e4fc00] Unable to find a suitable output format for '[a1][a2]amerge,pan=stereo|c0code> -
FFmpeg concat in android
13 avril 2018, par fvnI have trying to concat multiple videos (mp4 or mov)on Android Studio using FFMPEG. I have managed to get vidoes in an arrayList and their path like this :
private List<string> getSelectedVideos(Intent data) {
List<string> result = new ArrayList<>();
ClipData clipData = data.getClipData();
if(clipData != null) {
for(int i=0;icode></string></string>I have looked online on how to concat vidoes using FFMPEG https://trac.ffmpeg.org/wiki/Concatenate
However I’m not sure how to do it using Android studio. Any help would be much appreciated.
-
Merging two audio files in Android using FFMPEG
1er juillet 2021, par JeremyI'm working on an application that takes two audio files, and merges them into the respected channels. The way they are being equalized are not as good as I had hoped, So I want to adjust the volume of each file during the mixing phase. I've seen a couple of examples online, like this, this, and
[this][3]
.. but none of them are working for me. Can someone direct me in the right direction with this ? Much appreciation !


I am using this library to execute : https://github.com/WritingMinds/ffmpeg-android-java



Here is my code (EDIT)



String files = "-i " + mVoiceFile.getAbsolutePath() + " -i " + mBeatFile.getAbsolutePath();
String filter = "-filter_complex [0:a]volume=0.99[a1];[1:a]volume=0.3[a2][a1][a2]amerge=inputs=2,volume=1.3,pan=stereo|c0



enter code here



and here are my errors from running.



04-06 12:17:34.079 30975-30975/me.rapchat.rapchat E/Studio Process: WARNING: linker: /data/user/0/me.rapchat.rapchat/files/ffmpeg has text relocations. This is wasting memory and prevents security hardening. Please fix.
04-06 12:17:34.306 30975-30975/me.rapchat.rapchat E/Studio Process: ffmpeg version n2.4.2 Copyright (c) 2000-2014 the FFmpeg developers
04-06 12:17:34.306 30975-30975/me.rapchat.rapchat E/Studio Process: built on Oct 7 2014 15:08:46 with gcc 4.8 (GCC)
04-06 12:17:34.306 30975-30975/me.rapchat.rapchat E/Studio Process: configuration: --target-os=linux --cross-prefix=/home/sb/Source-Code/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/sb/Source-Code/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/sb/Source-Code/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/sb/Source-Code/ffmpeg-android/build/armeabi-v7a-neon --extra-cflags='-I/home/sb/Source-Code/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all -mfpu=neon' --extra-ldflags='-L/home/sb/Source-Code/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
04-06 12:17:34.307 30975-30975/me.rapchat.rapchat E/Studio Process: libavutil 54. 7.100 / 54. 7.100
04-06 12:17:34.307 30975-30975/me.rapchat.rapchat E/Studio Process: libavcodec 56. 1.100 / 56. 1.100
04-06 12:17:34.307 30975-30975/me.rapchat.rapchat E/Studio Process: libavformat 56. 4.101 / 56. 4.101
04-06 12:17:34.307 30975-30975/me.rapchat.rapchat E/Studio Process: libavdevice 56. 0.100 / 56. 0.100
04-06 12:17:34.308 30975-30975/me.rapchat.rapchat E/Studio Process: libavfilter 5. 1.100 / 5. 1.100
04-06 12:17:34.308 30975-30975/me.rapchat.rapchat E/Studio Process: libswscale 3. 0.100 / 3. 0.100
04-06 12:17:34.308 30975-30975/me.rapchat.rapchat E/Studio Process: libswresample 1. 1.100 / 1. 1.100
04-06 12:17:34.308 30975-30975/me.rapchat.rapchat E/Studio Process: libpostproc 53. 0.100 / 53. 0.100
04-06 12:17:34.372 30975-30975/me.rapchat.rapchat E/Studio Process: Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/data/user/0/me.rapchat.rapchat/cache/recording.m4a':
04-06 12:17:34.373 30975-30975/me.rapchat.rapchat E/Studio Process: Metadata:
04-06 12:17:34.373 30975-30975/me.rapchat.rapchat E/Studio Process: major_brand : mp42
04-06 12:17:34.373 30975-30975/me.rapchat.rapchat E/Studio Process: minor_version : 0
04-06 12:17:34.374 30975-30975/me.rapchat.rapchat E/Studio Process: compatible_brands: isommp42
04-06 12:17:34.374 30975-30975/me.rapchat.rapchat E/Studio Process: creation_time : 2016-04-06 19:17:33
04-06 12:17:34.374 30975-30975/me.rapchat.rapchat E/Studio Process: Duration: 00:00:01.56, start: 0.000000, bitrate: 144 kb/s
04-06 12:17:34.375 30975-30975/me.rapchat.rapchat E/Studio Process: Stream #0:0(eng): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 128 kb/s (default)
04-06 12:17:34.375 30975-30975/me.rapchat.rapchat E/Studio Process: Metadata:
04-06 12:17:34.375 30975-30975/me.rapchat.rapchat E/Studio Process: creation_time : 2016-04-06 19:17:33
04-06 12:17:34.375 30975-30975/me.rapchat.rapchat E/Studio Process: handler_name : SoundHandle
04-06 12:17:34.401 30975-30975/me.rapchat.rapchat E/Studio Process: Input #1, mov,mp4,m4a,3gp,3g2,mj2, from '/data/user/0/me.rapchat.rapchat/cache/beats/d3c37d60-ed50-4c00-b454-4e399a7858ff.m4a':
04-06 12:17:34.401 30975-30975/me.rapchat.rapchat E/Studio Process: Metadata:
04-06 12:17:34.401 30975-30975/me.rapchat.rapchat E/Studio Process: major_brand : mp42
04-06 12:17:34.401 30975-30975/me.rapchat.rapchat E/Studio Process: minor_version : 0
04-06 12:17:34.401 30975-30975/me.rapchat.rapchat E/Studio Process: compatible_brands: mp42isom
04-06 12:17:34.401 30975-30975/me.rapchat.rapchat E/Studio Process: creation_time : 1993-11-24 14:46:42
04-06 12:17:34.401 30975-30975/me.rapchat.rapchat E/Studio Process: encoder : Max 0.9.1
04-06 12:17:34.401 30975-30975/me.rapchat.rapchat E/Studio Process: iTunSMPB : 00000000 00000840 000003c0 000000000035dc00 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
04-06 12:17:34.401 30975-30975/me.rapchat.rapchat E/Studio Process: date : 2015
04-06 12:17:34.401 30975-30975/me.rapchat.rapchat E/Studio Process: Duration: 00:01:20.04, start: 0.047891, bitrate: 129 kb/s
04-06 12:17:34.402 30975-30975/me.rapchat.rapchat E/Studio Process: Stream #1:0(eng): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 127 kb/s (default)
04-06 12:17:34.402 30975-30975/me.rapchat.rapchat E/Studio Process: Metadata:
04-06 12:17:34.402 30975-30975/me.rapchat.rapchat E/Studio Process: creation_time : 1993-11-24 14:46:42
04-06 12:17:34.404 30975-30975/me.rapchat.rapchat E/Studio Process: [NULL @ 0xb5e4fc00] Unable to find a suitable output format for '[a1][a2]amerge,pan=stereo|c0me.rapchat.rapchat E/Studio Process: [a1][a2]amerge,pan=stereo|c0me.rapchat.rapchat E/Studio Status Failed: WARNING: linker: /data/user/0/me.rapchat.rapchat/files/ffmpeg has text relocations. This is wasting memory and prevents security hardening. Please fix.
 ffmpeg version n2.4.2 Copyright (c) 2000-2014 the FFmpeg developers
 built on Oct 7 2014 15:08:46 with gcc 4.8 (GCC)
 configuration: --target-os=linux --cross-prefix=/home/sb/Source-Code/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/sb/Source-Code/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/sb/Source-Code/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/sb/Source-Code/ffmpeg-android/build/armeabi-v7a-neon --extra-cflags='-I/home/sb/Source-Code/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all -mfpu=neon' --extra-ldflags='-L/home/sb/Source-Code/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
 libavutil 54. 7.100 / 54. 7.100
 libavcodec 56. 1.100 / 56. 1.100
 libavformat 56. 4.101 / 56. 4.101
 libavdevice 56. 0.100 / 56. 0.100
 libavfilter 5. 1.100 / 5. 1.100
 libswscale 3. 0.100 / 3. 0.100
 libswresample 1. 1.100 / 1. 1.100
 libpostproc 53. 0.100 / 53. 0.100
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/data/user/0/me.rapchat.rapchat/cache/recording.m4a':
 Metadata:
 major_brand : mp42
 minor_version : 0
 compatible_brands: isommp42
 creation_time : 2016-04-06 19:17:33
 Duration: 00:00:01.56, start: 0.000000, bitrate: 144 kb/s
 Stream #0:0(eng): Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 128 kb/s (default)
 Metadata:
 creation_time : 2016-04-06 19:17:33
 handler_name : SoundHandle
 Input #1, mov,mp4,m4a,3gp,3g2,mj2, from '/data/user/0/me.rapchat.rapchat/cache/beats/d3c37d60-ed50-4c00-b454-4e399a7858ff.m4a':
 Metadata:
 major_brand : mp42
 minor_version : 0
 compatible_brands: mp42isom
 creation_time : 1993-11-24 14:46:42
 encoder : Max 0.9.1
 iTunSMPB : 00000000 00000840 000003c0 000000000035dc00 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
 date : 2015
 Duration: 00:01:20.04, start: 0.047891, bitrate: 129 kb/s
 Stream #1:0(eng): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 127 kb/s (default)
 Metadata:
 creation_time : 1993-11-24 14:46:42
 [NULL @ 0xb5e4fc00] Unable to find a suitable output format for '[a1][a2]amerge,pan=stereo|c0code>