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Richard Stallman et le logiciel libre
19 octobre 2011, par
Mis à jour : Mai 2013
Langue : français
Type : Texte
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Concat filter : Error initializing output stream
18 juin 2020, par Ittai BarkaiThis is a follow-up question to : Flutter (Dart) : Merge two videos and view the new output in the device’s gallery (photos)



In essence, I am trying to record two videos, merge them and then view the new video in the gallery. I am currently having some issues with the flutter_ffmpeg package.



I uploaded the my Flutter project onto GitHub here :



https://github.com/IttaiBarkai/Flutter-Video-Merger



Below is a snippet of my code used to execute ffmpeg :



void _videoMerger() async {

 final appDir = await syspaths.getApplicationDocumentsDirectory();
 String rawDocumentPath = appDir.path;
 final outputPath = '$rawDocumentPath/output.mp4';

 final FlutterFFmpeg _flutterFFmpeg = new FlutterFFmpeg();

 String commandToExecute = '-y -i ${_storedVideoOne.path} -i ${_storedVideoTwo.path} -filter_complex \'[0:0][1:0]concat=n=2:v=1:a=0[out]\' -map \'[out]\' $outputPath';
 _flutterFFmpeg.execute(commandToExecute).then((rc) => print("FFmpeg process exited with rc $rc"));

 }



and this is the output displayed on my debug console when ffmpeg gets executed :



D/flutter-ffmpeg(29135): Running FFmpeg with arguments: [-y, -i, /storage/emulated/0/Android/data/com.example.video_merger_two/files/Pictures/1e8947f4-c9c2-4020-b78d-c40fb77ce0d16301015681843175998.mp4, -i, /storage/emulated/0/Android/data/com.example.video_merger_two/files/Pictures/3555b190-a9a6-450d-b6a7-7d1b8fc89ad38627500242651150494.mp4, -filter_complex, [0:0][1:0]concat=n=2:v=1:a=0[out], -map, [out], /data/user/0/com.example.video_merger_two/app_flutter/output.mp4].
 I/mobile-ffmpeg(29135): Loading mobile-ffmpeg.
 I/mobile-ffmpeg(29135): Loaded mobile-ffmpeg-https-x86-4.3.1-20200125.
 D/mobile-ffmpeg(29135): Callback thread started.
 I/mobile-ffmpeg(29135): ffmpeg version git-2020-01-25-fd11dd500
 I/mobile-ffmpeg(29135): Copyright (c) 2000-2020 the FFmpeg developers
 I/mobile-ffmpeg(29135):
 I/mobile-ffmpeg(29135): built with Android (5220042 based on r346389c) clang version 8.0.7 (https://android.googlesource.com/toolchain/clang b55f2d4ebfd35bf643d27dbca1bb228957008617) (https://android.googlesource.com/toolchain/llvm 3c393fe7a7e13b0fba4ac75a01aa683d7a5b11cd) (based on LLVM 8.0.7svn)
 I/mobile-ffmpeg(29135): configuration: --cross-prefix=i686-linux-android- --sysroot=/files/android-sdk/ndk-bundle/toolchains/llvm/prebuilt/linux-x86_64/sysroot --prefix=/home/taner/Projects/mobile-ffmpeg/prebuilt/android-x86/ffmpeg --pkg-config=/usr/bin/pkg-config --enable-version3 --arch=i686 --cpu=i686 --cc=i686-linux-android24-clang --cxx=i686-linux-android24-clang++ --target-os=android --disable-neon --disable-asm --disable-inline-asm --enable-cross-compile --enable-pic --enable-jni --enable-optimizations --enable-swscale --enable-shared --disable-v4l2-m2m --disable-outdev=v4l2 --disable-outdev=fbdev --disable-indev=v4l2 --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 --di
 I/mobile-ffmpeg(29135): libavutil 56. 38.100 / 56. 38.100
 I/mobile-ffmpeg(29135): libavcodec 58. 65.102 / 58. 65.102
 I/mobile-ffmpeg(29135): libavformat 58. 35.101 / 58. 35.101
 I/mobile-ffmpeg(29135): libavdevice 58. 9.103 / 58. 9.103
 I/mobile-ffmpeg(29135): libavfilter 7. 70.101 / 7. 70.101
 I/mobile-ffmpeg(29135): libswscale 5. 6.100 / 5. 6.100
 I/mobile-ffmpeg(29135): libswresample 3. 6.100 / 3. 6.100
 I/mobile-ffmpeg(29135): Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/Android/data/com.example.video_merger_two/files/Pictures/1e8947f4-c9c2-4020-b78d-c40fb77ce0d16301015681843175998.mp4':
 I/mobile-ffmpeg(29135): Metadata:
 I/mobile-ffmpeg(29135): major_brand :
 I/mobile-ffmpeg(29135): mp42
 I/mobile-ffmpeg(29135):
 I/mobile-ffmpeg(29135): minor_version :
 I/mobile-ffmpeg(29135): 0
 I/mobile-ffmpeg(29135):
 I/mobile-ffmpeg(29135): compatible_brands:
 I/mobile-ffmpeg(29135): isommp42
 I/mobile-ffmpeg(29135):
 I/mobile-ffmpeg(29135): creation_time :
 I/mobile-ffmpeg(29135): 2020-06-17T18:26:00.000000Z
 I/mobile-ffmpeg(29135):
 I/mobile-ffmpeg(29135): com.android.version:
 I/mobile-ffmpeg(29135): 10
 I/mobile-ffmpeg(29135):
 I/mobile-ffmpeg(29135): Duration:
 I/mobile-ffmpeg(29135): 27:34:19.38
 I/mobile-ffmpeg(29135): , start:
 I/mobile-ffmpeg(29135): 0.000000
 I/mobile-ffmpeg(29135): , bitrate:
 I/mobile-ffmpeg(29135): 0 kb/s
 I/mobile-ffmpeg(29135):
 I/mobile-ffmpeg(29135): Stream #0:0
 I/mobile-ffmpeg(29135): (eng)
 I/mobile-ffmpeg(29135): : Video: h264 (avc1 / 0x31637661), yuv420p(tv, GBR), 1280x720, 3554 kb/s
 I/mobile-ffmpeg(29135): , SAR 1:1 DAR 16:9
 I/mobile-ffmpeg(29135): ,
 I/mobile-ffmpeg(29135): 29.01 fps,
 I/mobile-ffmpeg(29135): 29 tbr,
 I/mobile-ffmpeg(29135): 90k tbn,
 I/mobile-ffmpeg(29135): 180k tbc 
 I/mobile-ffmpeg(29135): (default)
 I/mobile-ffmpeg(29135):
 I/mobile-ffmpeg(29135): Metadata:
 I/mobile-ffmpeg(29135): rotate :
 I/mobile-ffmpeg(29135): 90
 I/mobile-ffmpeg(29135):
 I/mobile-ffmpeg(29135): creation_time :
 I/mobile-ffmpeg(29135): 2020-06-17T18:26:00.000000Z
 I/mobile-ffmpeg(29135):
 I/mobile-ffmpeg(29135): handler_name :
 I/mobile-ffmpeg(29135): VideoHandle
 I/mobile-ffmpeg(29135):
 I/mobile-ffmpeg(29135): Side data:
 I/mobile-ffmpeg(29135):
 I/mobile-ffmpeg(29135): displaymatrix: rotation of -90.00 degrees
 I/mobile-ffmpeg(29135):
 I/mobile-ffmpeg(29135): Stream #0:1
 I/mobile-ffmpeg(29135): (eng)
 I/mobile-ffmpeg(29135): : Audio: amr_nb (samr / 0x726D6173), 8000 Hz, mono, flt, 12 kb/s
 I/mobile-ffmpeg(29135): (default)
 I/mobile-ffmpeg(29135):
 I/mobile-ffmpeg(29135): Metadata:
 I/mobile-ffmpeg(29135): creation_time :
 I/mobile-ffmpeg(29135): 2020-06-17T18:26:00.000000Z
 I/mobile-ffmpeg(29135):
 I/mobile-ffmpeg(29135): handler_name :
 I/mobile-ffmpeg(29135): SoundHandle
 I/mobile-ffmpeg(29135):
 I/mobile-ffmpeg(29135): Input #1, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/Android/data/com.example.video_merger_two/files/Pictures/3555b190-a9a6-450d-b6a7-7d1b8fc89ad38627500242651150494.mp4':
 I/mobile-ffmpeg(29135): Metadata:
 I/mobile-ffmpeg(29135): major_brand :
 I/mobile-ffmpeg(29135): mp42
 I/mobile-ffmpeg(29135):
 I/mobile-ffmpeg(29135): minor_version :
 I/mobile-ffmpeg(29135): 0
 I/mobile-ffmpeg(29135):
 I/mobile-ffmpeg(29135): compatible_brands:
 I/mobile-ffmpeg(29135): isommp42
 I/mobile-ffmpeg(29135):
 I/mobile-ffmpeg(29135): creation_time :
 I/mobile-ffmpeg(29135): 2020-06-17T18:26:09.000000Z
 I/mobile-ffmpeg(29135):
 I/mobile-ffmpeg(29135): com.android.version:
 I/mobile-ffmpeg(29135): 10
 I/mobile-ffmpeg(29135):
 I/mobile-ffmpeg(29135): Duration:
 I/mobile-ffmpeg(29135): 27:34:19.62
 I/mobile-ffmpeg(29135): , start:
 I/mobile-ffmpeg(29135): 0.000000
 I/mobile-ffmpeg(29135): , bitrate:
 I/mobile-ffmpeg(29135): 0 kb/s
 I/mobile-ffmpeg(29135):
 I/mobile-ffmpeg(29135): Stream #1:0
 I/mobile-ffmpeg(29135): (eng)
 I/mobile-ffmpeg(29135): : Video: h264 (avc1 / 0x31637661), yuv420p(tv, GBR), 1280x720, 3765 kb/s
 I/mobile-ffmpeg(29135): , SAR 1:1 DAR 16:9
 I/mobile-ffmpeg(29135): ,
 I/mobile-ffmpeg(29135): 28.80 fps,
 I/mobile-ffmpeg(29135): 29.08 tbr,
 I/mobile-ffmpeg(29135): 90k tbn,
 I/mobile-ffmpeg(29135): 180k tbc
 I/mobile-ffmpeg(29135): (default)
 I/mobile-ffmpeg(29135):
 I/mobile-ffmpeg(29135): Metadata:
 I/mobile-ffmpeg(29135): rotate :
 I/mobile-ffmpeg(29135): 90
 I/mobile-ffmpeg(29135):
 I/mobile-ffmpeg(29135): creation_time :
 I/mobile-ffmpeg(29135): 2020-06-17T18:26:09.000000Z
 I/mobile-ffmpeg(29135):
 I/mobile-ffmpeg(29135): handler_name :
 I/mobile-ffmpeg(29135): VideoHandle
 I/mobile-ffmpeg(29135):
 I/mobile-ffmpeg(29135): Side data:
 I/mobile-ffmpeg(29135):
 I/mobile-ffmpeg(29135): displaymatrix: rotation of -90.00 degrees
 I/mobile-ffmpeg(29135):
 I/mobile-ffmpeg(29135): Stream #1:1
 I/mobile-ffmpeg(29135): (eng)
 I/mobile-ffmpeg(29135): : Audio: amr_nb (samr / 0x726D6173), 8000 Hz, mono, flt, 12 kb/s
 I/mobile-ffmpeg(29135): (default)
 I/mobile-ffmpeg(29135):
 I/mobile-ffmpeg(29135): Metadata:
 I/mobile-ffmpeg(29135): creation_time :
 I/mobile-ffmpeg(29135): 2020-06-17T18:26:09.000000Z
 I/mobile-ffmpeg(29135):
 I/mobile-ffmpeg(29135): handler_name :
 I/mobile-ffmpeg(29135): SoundHandle
 I/mobile-ffmpeg(29135):
 I/mobile-ffmpeg(29135): Stream mapping:
 I/mobile-ffmpeg(29135): Stream #0:0 (h264) -> concat:in0:v0
 I/mobile-ffmpeg(29135):
 I/mobile-ffmpeg(29135): Stream #1:0 (h264) -> concat:in1:v0
 I/mobile-ffmpeg(29135):
 I/mobile-ffmpeg(29135): concat
 I/mobile-ffmpeg(29135): -> Stream #0:0 (mpeg4)
 I/mobile-ffmpeg(29135): Press [q] to stop, [?] for help
 W/mobile-ffmpeg(29135): [graph 0 input from stream 0:0 @ 0xed087710] sws_param option is deprecated and ignored
 W/mobile-ffmpeg(29135): [graph 0 input from stream 1:0 @ 0xed086830] sws_param option is deprecated and ignored
 W/mobile-ffmpeg(29135): [mp4 @ 0xeccd8790] Frame rate very high for a muxer not efficiently supporting it.
 W/mobile-ffmpeg(29135): Please consider specifying a lower framerate, a different muxer or -vsync 2
 E/mobile-ffmpeg(29135): [mpeg4 @ 0xe68049d0] timebase 1/1000000 not supported by MPEG 4 standard, the maximum admitted value for the timebase denominator is 65535
 E/mobile-ffmpeg(29135): Error initializing output stream 0:0 -- Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
 I/mobile-ffmpeg(29135): Conversion failed!
 D/flutter-ffmpeg(29135): FFmpeg exited with rc: 1
 I/flutter (29135): FFmpeg process exited with rc 1


-
How to get the output resolution after successful encode ?
11 janvier 2021, par Daniel Birowsky PopeskiI'm using fluent-ffmpeg and I'm already able to get the output resolution in the 'on end' event :


createFfmpegCommand()
 .input(fs.createReadStream(readPath))
 .noAudio()
 .fps(30)
 .format('mp4')
 .videoCodec('libx264')
 .videoFilter([
 {filter: 'scale', options: '1920:1920:force_original_aspect_ratio=decrease'},
 {filter: 'setpts', options: '1.5*PTS'},
 ])
 .outputOption('-crf 30')
 .outputOption('-movflags frag_keyframe')
 .outputOption('-movflags +faststart')
 .output(mp4WriteStream)
 .on('start', () => console.log('processing started'))
 .on('error', err => console.error('err', err))
 .on('end', (_,res) => console.log('processing success',res))
 .run();


However, i'd like it to be machine-readable (json or xml). Instead, it looks like this :


ffmpeg version 4.3.1 Copyright (c) 2000-2020 the FFmpeg developers
 built with Apple clang version 12.0.0 (clang-1200.0.32.28)
 configuration: --prefix=/usr/local/Cellar/ffmpeg/4.3.1_8 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr --enable-videotoolbox --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack
 libavutil 56. 51.100 / 56. 51.100
 libavcodec 58. 91.100 / 58. 91.100
 libavformat 58. 45.100 / 58. 45.100
 libavdevice 58. 10.100 / 58. 10.100
 libavfilter 7. 85.100 / 7. 85.100
 libavresample 4. 0. 0 / 4. 0. 0
 libswscale 5. 7.100 / 5. 7.100
 libswresample 3. 7.100 / 3. 7.100
 libpostproc 55. 7.100 / 55. 7.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'pipe:0':
 Metadata:
 major_brand : mp42
 minor_version : 0
 compatible_brands: mp42mp41
 creation_time : 2020-05-28T09:51:18.000000Z
 Duration: 00:00:02.23, start: 0.000000, bitrate: N/A
 Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080, 9108 kb/s, 30 fps, 30 tbr, 30k tbn, 60 tbc (default)
 Metadata:
 creation_time : 2020-05-28T09:51:18.000000Z
 handler_name : ?Mainconcept Video Media Handler
 encoder : AVC Coding
Stream mapping:
 Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
[libx264 @ 0x7f92d9808e00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x7f92d9808e00] profile High, level 4.0, 4:2:0, 8-bit
[libx264 @ 0x7f92d9808e00] 264 - core 161 r3027 4121277 - 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=30.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'pipe:1':
 Metadata:
 major_brand : mp42
 minor_version : 0
 compatible_brands: mp42mp41
 encoder : Lavf58.45.100
 Stream #0:0(eng): Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 1920x1080, q=-1--1, 30 fps, 15360 tbn, 30 tbc (default)
 Metadata:
 creation_time : 2020-05-28T09:51:18.000000Z
 handler_name : ?Mainconcept Video Media Handler
 encoder : Lavc58.91.100 libx264
 Side data:
 cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
frame= 64 fps=0.0 q=36.0 size= 0kB time=00:00:00.16 bitrate= 1.7kbits/s dup=21 drop=0 speed=0.316x 
frame= 100 fps=0.0 q=-1.0 Lsize= 108kB time=00:00:03.23 bitrate= 274.7kbits/s dup=33 drop=0 speed=3.25x 
video:106kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.906519%
[libx264 @ 0x7f92d9808e00] frame I:1 Avg QP:25.71 size: 8782
[libx264 @ 0x7f92d9808e00] frame P:25 Avg QP:30.10 size: 2308
[libx264 @ 0x7f92d9808e00] frame B:74 Avg QP:27.92 size: 564
[libx264 @ 0x7f92d9808e00] consecutive B-frames: 1.0% 0.0% 3.0% 96.0%
[libx264 @ 0x7f92d9808e00] mb I I16..4: 19.4% 77.2% 3.3%
[libx264 @ 0x7f92d9808e00] mb P I16..4: 0.3% 0.8% 0.1% P16..4: 4.6% 1.3% 0.4% 0.0% 0.0% skip:92.5%
[libx264 @ 0x7f92d9808e00] mb B I16..4: 0.0% 0.0% 0.0% B16..8: 4.0% 0.2% 0.0% direct: 0.0% skip:95.7% L0:44.2% L1:54.8% BI: 1.0%
[libx264 @ 0x7f92d9808e00] 8x8 transform intra:75.0% inter:78.3%
[libx264 @ 0x7f92d9808e00] coded y,uvDC,uvAC intra: 8.8% 8.8% 2.4% inter: 0.3% 0.2% 0.0%
[libx264 @ 0x7f92d9808e00] i16 v,h,dc,p: 77% 7% 10% 6%
[libx264 @ 0x7f92d9808e00] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 48% 3% 42% 1% 1% 1% 1% 1% 1%
[libx264 @ 0x7f92d9808e00] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 28% 16% 26% 7% 4% 4% 3% 5% 6%
[libx264 @ 0x7f92d9808e00] i8c dc,h,v,p: 89% 5% 5% 1%
[libx264 @ 0x7f92d9808e00] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 0x7f92d9808e00] ref P L0: 66.9% 11.1% 16.7% 5.3%
[libx264 @ 0x7f92d9808e00] ref B L0: 87.5% 9.9% 2.6%
[libx264 @ 0x7f92d9808e00] ref B L1: 96.4% 3.6%
[libx264 @ 0x7f92d9808e00] kb/s:259.80


Which doesn't let me be comfortable that my regex to extract the output resolution is always going to work.


Also, I don't wanna make another call/fileread just to get the resolution. Mainly because my files are stored in S3, where
ffprobedoesn't work.

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