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Autres articles (107)
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L’utiliser, en parler, le critiquer
10 avril 2011La première attitude à adopter est d’en parler, soit directement avec les personnes impliquées dans son développement, soit autour de vous pour convaincre de nouvelles personnes à l’utiliser.
Plus la communauté sera nombreuse et plus les évolutions seront rapides ...
Une liste de discussion est disponible pour tout échange entre utilisateurs. -
Mediabox : ouvrir les images dans l’espace maximal pour l’utilisateur
8 février 2011, parLa visualisation des images est restreinte par la largeur accordée par le design du site (dépendant du thème utilisé). Elles sont donc visibles sous un format réduit. Afin de profiter de l’ensemble de la place disponible sur l’écran de l’utilisateur, il est possible d’ajouter une fonctionnalité d’affichage de l’image dans une boite multimedia apparaissant au dessus du reste du contenu.
Pour ce faire il est nécessaire d’installer le plugin "Mediabox".
Configuration de la boite multimédia
Dès (...) -
Participer à sa documentation
10 avril 2011La documentation est un des travaux les plus importants et les plus contraignants lors de la réalisation d’un outil technique.
Tout apport extérieur à ce sujet est primordial : la critique de l’existant ; la participation à la rédaction d’articles orientés : utilisateur (administrateur de MediaSPIP ou simplement producteur de contenu) ; développeur ; la création de screencasts d’explication ; la traduction de la documentation dans une nouvelle langue ;
Pour ce faire, vous pouvez vous inscrire sur (...)
Sur d’autres sites (12910)
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Apply multiple text filters at once and burn into video for captioning without re-encoding, and fix error [ffmpeg-python wrapper]
13 mai, par BaldiIs there any way to burn text into a video without re-encoding ? I ask this because the re-encoding process goes at around 0.1x speed on my device when writing to WEBM. Alternatively, if there is a faster way to render high quality video quickly while still re-encoding that would be great. I vaguely remember someone writing to a temporary file to solve this problem.


Also small error in program, code attatched


def processVideo(self):
 print("creating video")

 # File location management
 font_path = self.input_path / "CalSans-Regular.ttf"
 background_path = self.input_path / "new_video_background.webm"
 audio_path = self.sound_output_path
 video_ouput_path = self.parent_path / "new_result.webm"
 sound_input = ffmpeg.input(str(audio_path))
 video_input = ffmpeg.input(str(background_path))

 # Adding captions
 print(self.text_caption)
 previous_timepoint = 0
 for caption, timepoint in zip(self.text_caption, self.timepoints, strict=False): 
 # Text caption and timepooints are lists where the end of the words in text_caption correspond
 # to the timepoint with the same index in timepoint
 video_input = video_input.drawtext(
 text=caption, 
 fontfile = font_path, 
 x='w-text_w/2', 
 y='h-text_h/2', 
 escape_text=True, 
 fontsize= 32,
 bordercolor = "black",
 borderw = 4,
 enable=f'between(t,{previous_timepoint},{timepoint["timeSeconds"]})'
 )
 previous_timepoint = timepoint["timeSeconds"]
 
 # Combining sound and video and writing output
 command = ffmpeg.output(sound_input, video_input, str(video_ouput_path), codec='copy').overwrite_output().global_args('-shortest')
 print("args =", command)
 print(command.get_args())
 command.run()
 print("done!")


File "c:\Desktop\Projects\video_project\main.py", line 239, in <module>
 post_list[0].processVideo()
 ~~~~~~~~~~~~~~~~~~~~~~~~~^^
 File "c:\Desktop\Projects\video_project\main.py", line 223, in processVideo
 command.run()
 ~~~~~~~~~~~^^
 File "C:\Desktop\Projects\video_project\.venv\Lib\site-packages\ffmpeg\_run.py", line 313, in run
 process = run_async(
 stream_spec,
 ...<5 lines>...
 overwrite_output=overwrite_output,
 )
 File "C:\Desktop\Projects\video_project\.venv\Lib\site-packages\ffmpeg\_run.py", line 284, in run_async
 return subprocess.Popen(
 ~~~~~~~~~~~~~~~~^
 args, stdin=stdin_stream, stdout=stdout_stream, stderr=stderr_stream
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 )
 ^
 File "C:\AppData\Local\Programs\Python\Python313\Lib\subprocess.py", line 1038, in __init__
 self._execute_child(args, executable, preexec_fn, close_fds,
 ~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 pass_fds, cwd, env,
 ^^^^^^^^^^^^^^^^^^^
 ...<5 lines>...
 gid, gids, uid, umask,
 ^^^^^^^^^^^^^^^^^^^^^^
 start_new_session, process_group)
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 File "C:\AppData\Local\Programs\Python\Python313\Lib\subprocess.py", line 1550, in _execute_child
 hp, ht, pid, tid = _winapi.CreateProcess(executable, args,
 ~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^
 # no special security
 ^^^^^^^^^^^^^^^^^^^^^
 ...<4 lines>...
 cwd,
 ^^^^
 startupinfo)
 ^^^^^^^^^^^^
FileNotFoundError: [WinError 206] The filename or extension is too long
</module>

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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>

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Redux : how to add subtitles to mp4 using ffmpeg ?
25 novembre 2015, par stachyraI have a tiny little example mp4 video (which unfortunately stack overflow won’t allow me to embed directly inside my question). Following the advice previously offered in this answer, I’d like to add a subtitle to the video, which will flash on the screen for 2 seconds, using an .srt file that looks like this :
1
00:00:02,000 --> 00:00:04,000
Test subtitleAs provided in the link above, I issue a command that looks like this :
ffmpeg -i small.mp4 -f srt -i small.srt -c:v copy -c:a copy -c:s mov_text small_subtitles.mp4 >& err.logAnd the
err.logfile looks like this :ffmpeg version N-76950-g401c93d-tessus Copyright (c) 2000-2015 the FFmpeg developers
built with Apple LLVM version 6.0 (clang-600.0.57) (based on LLVM 3.5svn)
configuration: --cc=/usr/bin/clang --prefix=/opt/ffmpeg --as=yasm --extra-version=tessus --enable-avisynth --enable-fontconfig --enable-gpl --enable-libass --enable-libbluray --enable-libfreetype --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopus --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzmq --enable-version3 --disable-ffplay --disable-indev=qtkit --disable-indev=x11grab_xcb
libavutil 55. 7.100 / 55. 7.100
libavcodec 57. 15.100 / 57. 15.100
libavformat 57. 17.100 / 57. 17.100
libavdevice 57. 0.100 / 57. 0.100
libavfilter 6. 15.100 / 6. 15.100
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.101 / 2. 0.101
libpostproc 54. 0.100 / 54. 0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'small.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf56.40.101
Duration: 00:00:10.02, start: 0.000000, bitrate: 23 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 188x112 [SAR 1:1 DAR 47:28], 17 kb/s, 60 fps, 60 tbr, 15360 tbn, 120 tbc (default)
Metadata:
handler_name : VideoHandler
Input #1, srt, from 'small.srt':
Duration: N/A, bitrate: N/A
Stream #1:0: Subtitle: subrip
[mp4 @ 0x7f8492848000] Codec for stream 0 does not use global headers but container format requires global headers
Output #0, mp4, to 'small_subtitles.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf57.17.100
Stream #0:0(und): Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 188x112 [SAR 1:1 DAR 47:28], q=2-31, 17 kb/s, 60 fps, 60 tbr, 15360 tbn, 15360 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1: Subtitle: mov_text ([8][0][0][0] / 0x0008) (default)
Metadata:
encoder : Lavc57.15.100 mov_text
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #1:0 -> #0:1 (subrip (srt) -> mov_text (native))
Press [q] to stop, [?] for help
frame= 601 fps=0.0 q=-1.0 Lsize= 29kB time=00:00:09.96 bitrate= 24.0kbits/s
video:21kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 39.561928%The resulting output,
small_subtitles.mp4, does not seem to have the expected subtitle present.Furthermore, the error message,
[mp4 @ 0x7f8492848000] Codec for stream 0 does not use global headers but container format requires global headersis highlighted in bold colors when I run this at the command line without capturing the
err.logfile (which makes me think it must be a significant message), although I am unable to reproduce that special print formatting easily here.I’ve also tried this method, but with the .avi replaced by .mp4, and it seems to just fail silently—no obvious error message, but also no subtitle in the resulting video either.
Anybody have an idea how to fix this ? In particular, what does the business about global headers mean ?
I’m working on OS X and am open to hearing answers that would use other open source tools as well.
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