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Autres articles (26)
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Contribute to documentation
13 avril 2011Documentation is vital to the development of improved technical capabilities.
MediaSPIP welcomes documentation by users as well as developers - including : critique of existing features and functions articles contributed by developers, administrators, content producers and editors screenshots to illustrate the above translations of existing documentation into other languages
To contribute, register to the project users’ mailing (...) -
Other interesting software
13 avril 2011, parWe don’t claim to be the only ones doing what we do ... and especially not to assert claims to be the best either ... What we do, we just try to do it well and getting better ...
The following list represents softwares that tend to be more or less as MediaSPIP or that MediaSPIP tries more or less to do the same, whatever ...
We don’t know them, we didn’t try them, but you can take a peek.
Videopress
Website : http://videopress.com/
License : GNU/GPL v2
Source code : (...) -
Supporting all media types
13 avril 2011, parUnlike most software and media-sharing platforms, MediaSPIP aims to manage as many different media types as possible. The following are just a few examples from an ever-expanding list of supported formats : images : png, gif, jpg, bmp and more audio : MP3, Ogg, Wav and more video : AVI, MP4, OGV, mpg, mov, wmv and more text, code and other data : OpenOffice, Microsoft Office (Word, PowerPoint, Excel), web (html, CSS), LaTeX, Google Earth and (...)
Sur d’autres sites (5630)
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ffmpeg filter complex error ( burning subtitles used overlay filter)
8 septembre 2020, par jgkim0518I try to burn dvb subtitles, based image, on video used ffmpeg overlay filter. but I failed because wrong using filter complex.


It's my command line.


./ffmpeg -y -hwaccel cuda -hwaccel_output_format cuda -hwaccel_device 0 \
-i input.ts \
-filter_complex "[v:0][s:3]overlay[overlay];[overlay]hwupload_cuda[base];[base]scale_npp=1920:1080[v1];[base]scale_npp=1920:1080[v2];[base]scale_npp=1280:720[v3];[base]scale_npp=720:480[v4];[base]scale_npp=480:360[v5]" \
-map "[v1]" -map 0:a -c:v hevc_nvenc -b:v 6000000 -maxrate 7000000 -bufsize 12000000 -g 15 -c:a libfdk_aac -ar 48000 -ac 2 -pkt_size 128000 -f mpegts test_1.ts \
-map "[v2]" -map 0:a -c:v h264_nvenc -an -b:v 4000000 -maxrate 5000000 -bufsize 8000000 -g 15 -f mpegts test_2.ts \
-map "[v3]" -map 0:a -c:v h264_nvenc -an -b:v 2500000 -maxrate 3500000 -bufsize 5000000 -g 15 -f mpegts test_3.ts \
-map "[v4]" -map 0:a -c:v h264_nvenc -an -b:v 1500000 -maxrate 2500000 -bufsize 3000000 -g 15 -f mpegts test_4.ts \
-map "[v5]" -map 0:a -c:v h264_nvenc -an -b:v 800000 -maxrate 1800000 -bufsize 2000000 -g 15 -f mpegts test_5.ts


but I failed. It is error messages.


Input #0, mpegts, from 'input.ts':
Duration: N/A, start: 22881.964411, bitrate: N/A
 Program 1 
 Metadata:
 service_name : Service01
 service_provider: FFmpeg
 Stream #0:0[0x100](eng): Audio: ac3 ([129][0][0][0] / 0x0081), 48000 Hz, 5.1(side), fltp, 384 kb/s
 Stream #0:1[0x101](ind): Audio: ac3 ([129][0][0][0] / 0x0081), 48000 Hz, stereo, fltp, 192 kb/s
 Stream #0:2[0x102](zho): Audio: ac3 ([129][0][0][0] / 0x0081), 48000 Hz, stereo, fltp, 192 kb/s
 Stream #0:3[0x103](kho): Audio: ac3 ([129][0][0][0] / 0x0081), 48000 Hz, stereo, fltp, 192 kb/s
 Stream #0:4[0x104]: Video: h264 (High), 1 reference frame ([27][0][0][0] / 0x001B), yuv420p(top first, left), 1920x1080 (1920x1088) [SAR 1:1 DAR 16:9], 25 fps, 50 tbr, 90k tbn, 50 tbc
 Stream #0:5[0x105](CHI): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
 Stream #0:6[0x106](CHS): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
 Stream #0:7[0x107](IND): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
 Stream #0:8[0x108](THA): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
 Stream #0:9[0x109](MAN): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
 Stream #0:10[0x10a](MON): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
 Stream #0:11[0x10b](BUR): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
 Stream #0:12[0x10c](ENG): Subtitle: dvb_subtitle ([6][0][0][0] / 0x0006)
 [mpegts @ 0x47cbd00] Invalid stream specifier: base.
 Last message repeated 17 times
 Stream specifier 'base' in filtergraph description [v:0][s:3]overlay[overlay];[overlay]hwupload_cuda[base];[base]scale_npp=1920:1080[v1];[base]scale_npp=1920:1080[v2];[base]scale_npp=1280:720[v3];[base]scale_npp=720:480[v4];[base]scale_npp=480:360[v5] matches no streams.


My plan is this.



How to do burn subtitle on video using filter complex, ffmpeg from this structure ?


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How can I send a virtual camera to Genymotion or Android Studio Emulator in Ubuntu ?
4 décembre 2020, par ykasurI created a virtual camera using v4l2loopback and ffmpeg. The command I use for ffmpeg is :
ffmpeg -re -l oop 1 -i vin.png -vf format=yuv420p -f v4l2 /dev/video2


vin.png is the image I want to stream to the webcam and /dev/video2 is the virtual webcam I created with v4l2loopback.
The virtual webcam works and I can see it e.g. with onlinemicetest.com/webcam-test.
I'm using the Genymotion emulator with the newest Android API (I tried 7.0, 8.1 and 10.0) on Ubuntu 20.40.
Genymotion detects the virtual camera but only displays a dummy image :
Wrong dummy Image from Genymotion
I also tried (and would prefer to use) the android studio emulator. But I can only select Webcam0 in the configuration of the device camera and that points to the real integrated camera and not to my virtual webcam.


I don't need to use ffmpeg, but I do need to use a tool that lets me control which image to stream from the command line.


Is there a way to solve this ? Many thanks in advance !


Update 17.11.2020 :
The Genymotion support answered me, that they plan to support virtual cameras in the future. They might be ready to add this in mid 2021.


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Why ffmpeg can play h264 even when flag —disable-libx264 is set ? [closed]
2 décembre 2020, par JamsTo be complient with x264 licensing (for a commercial software I'm making) I plan to use a compiled version of ffmpeg without x264 support.
Here is the ouput of the command line ffmpeg -L :




ffmpeg version n4.3.1-20-g8a2acdc6da Copyright (c) 2000-2020 the FFmpeg developers
built with gcc 9.3-win32 (GCC) 20200320
configuration : —prefix=/ffbuild/prefix —pkg-config-flags=—static —pkg-config=pkg-config —cross-prefix=x86_64-w64-mingw32- —arch=x86_64 —target-os=mingw32 —enable-version3 —disable-debug —enable-shared —disable-static —disable-debug —enable-iconv —enable-zlib —enable-libxml2 —enable-libfreetype —enable-libfribidi —enable-gmp —enable-lzma —enable-fontconfig —enable-opencl —enable-libvmaf —disable-vulkan —enable-libvorbis —enable-amf —enable-libaom —disable-avisynth —enable-libdav1d —disable-libdavs2 —enable-ffnvcodec —enable-cuda-llvm —disable-libglslang —enable-libass —enable-libbluray —enable-libmp3lame —enable-libopus —enable-libtheora —enable-libvpx —enable-libwebp —enable-libmfx —enable-libopencore-amrnb —enable-libopencore-amrwb —enable-libopenjpeg —enable-librav1e —enable-schannel —enable-sdl2 —enable-libsoxr —enable-libsrt —enable-libtwolame —disable-libvidstab —disable-libx264 —disable-libx265 —disable-libxavs2 —disable-libxvid —enable-libzimg —extra-cflags=-DLIBTWOLAME_STATIC —extra-cxxflags= —extra-ldflags=-pthread —extra-libs=-lgomp
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
libswscale 5. 7.100 / 5. 7.100
libswresample 3. 7.100 / 3. 7.100
ffmpeg is free software ; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation ; either version 3 of the License, or
(at your option) any later version.




But when I play a video encoded with h264 it plays perfectly.
Is expected ? How to be sure I'm not infringing the license ?


Here is where I downloaded the binaries :
https://github.com/BtbN/FFmpeg-Builds/releases

And I picked a release with the following name : win64-gpl-shared-4.3.zip

Thanks.


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