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Médias (91)
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999,999
26 septembre 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Audio
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The Slip - Artworks
26 septembre 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Texte
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Demon seed (wav version)
26 septembre 2011, par
Mis à jour : Avril 2013
Langue : English
Type : Audio
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The four of us are dying (wav version)
26 septembre 2011, par
Mis à jour : Avril 2013
Langue : English
Type : Audio
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Corona radiata (wav version)
26 septembre 2011, par
Mis à jour : Avril 2013
Langue : English
Type : Audio
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Lights in the sky (wav version)
26 septembre 2011, par
Mis à jour : Avril 2013
Langue : English
Type : Audio
Sur d’autres sites (114)
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What is the bitrate of my audio file based on ffmpeg output ?
21 avril 2015, par blueetherIs it the 40kb/s under
Format
, or is it the 16kb/s underStream
? What is the relationship between the Format and the Stream ?
The below output is for a file generated using Core Audio on an iphone, with an Audio Unit. The output format was specified by anAudioStreamBasicDescription
descriptorUpdated :
Output fromffprobe -v error -show_format -show_streams 123_1429602551009.051025.m4a
:[STREAM]
index=0
codec_name=aac
codec_long_name=AAC (Advanced Audio Coding)
profile=LC
codec_type=audio
codec_time_base=1/8000
codec_tag_string=mp4a
codec_tag=0x6134706d
sample_fmt=fltp
sample_rate=8000
channels=1
channel_layout=mono
bits_per_sample=0
id=N/A
r_frame_rate=0/0
avg_frame_rate=0/0
time_base=1/8000
start_pts=0
start_time=0.000000
duration_ts=43008
duration=5.376000
bit_rate=16501
max_bit_rate=N/A
bits_per_raw_sample=N/A
nb_frames=42
nb_read_frames=N/A
nb_read_packets=N/A
DISPOSITION:default=1
DISPOSITION:dub=0
DISPOSITION:original=0
DISPOSITION:comment=0
DISPOSITION:lyrics=0
DISPOSITION:karaoke=0
DISPOSITION:forced=0
DISPOSITION:hearing_impaired=0
DISPOSITION:visual_impaired=0
DISPOSITION:clean_effects=0
DISPOSITION:attached_pic=0
TAG:creation_time=1970-04-16 22:36:01
TAG:language=eng
[/STREAM]
[FORMAT]
filename=123_1429602551009.051025.m4a
nb_streams=1
nb_programs=0
format_name=mov,mp4,m4a,3gp,3g2,mj2
format_long_name=QuickTime / MOV
start_time=0.000000
duration=5.376000
size=27473
bit_rate=40882
probe_score=100
TAG:major_brand=M4A
TAG:minor_version=0
TAG:compatible_brands=M4A mp42isom
TAG:creation_time=1970-04-16 22:36:01
TAG:iTunSMPB= 00000000 00000840 00000361 0000000000009C5F 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[/FORMAT] -
Merge video files using Concat filter in FFmpeg
8 juillet 2013, par vijayI am using FFmpeg to concat video files of different codecs in my android application.
I read the FFmpeg documentation and tried the following things.1. ffmpeg -i "concat:input1.mpg|input2.mpg" -c copy output.mp4
(works only for mpg files)2. ffmpeg -i 1.mp4 -c copy -bsf dump_extra 1.ts
ffmpeg -i 2.mp4 -c copy -bsf dump_extra 2.ts
ffmpeg -i "concat:1.ts|2.ts" -c copy output.mp4 (works for mp4 files)I tried both the methods for 3gp files but it throws an error in stream filters.The second method stores the .ts files in device that should not be done and also i lost the quality of the video.
When i googled it out i found that FFmpeg provides a way to concat files with different codecs.So i tried the following command to this in a single step without storing files in device.
fmpeg -i 1.mp4 -i 2.3gp -i 3.mpg -filter_complex '[0:0] [0:1] [1:0] [1:1]
[2:0] [2:1] concat=n=3:v=1:a=1 [a] [v] ' -map '[a]' -map '[v]' -c copy output.mp4It throws the following exception :
ffmpeg version 1.2.1 Copyright (c) 2000-2013 the FFmpeg developers
built on Jun 25 2013 20:34:51 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
configuration:
libavutil 52. 18.100 / 52. 18.100
libavcodec 54. 92.100 / 54. 92.100
libavformat 54. 63.104 / 54. 63.104
libavdevice 54. 3.103 / 54. 3.103
libavfilter 3. 42.103 / 3. 42.103
libswscale 2. 2.100 / 2. 2.100
libswresample 0. 17.102 / 0. 17.102
F.mp4: No such file or directory
tsk@tsk:~/Android/Backups/android-ffmpeg-x264/Project/jni$ ffmpeg -i 1.mp4 -i 2.mp4 -filter_complex '[0:1] [0:0] [1:1] [1:0] concat=n=2:v=1:a=1 [v] [a]' -map '[v]' -map '[a]' output.mp4
ffmpeg version 1.2.1 Copyright (c) 2000-2013 the FFmpeg developers
built on Jun 25 2013 20:34:51 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
configuration:
libavutil 52. 18.100 / 52. 18.100
libavcodec 54. 92.100 / 54. 92.100
libavformat 54. 63.104 / 54. 63.104
libavdevice 54. 3.103 / 54. 3.103
libavfilter 3. 42.103 / 3. 42.103
libswscale 2. 2.100 / 2. 2.100
libswresample 0. 17.102 / 0. 17.102
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '1.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: mp41
creation_time : 1970-01-01 00:00:00
Duration: 00:00:04.04, start: 0.000000, bitrate: 1457 kb/s
Stream #0:0(und): Video: mpeg4 (Simple Profile) (mp4v / 0x7634706D), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 1454 kb/s, SAR 349:320 DAR 349:240, 25 fps, 25 tbr, 25 tbn, 25 tbc
Metadata:
creation_time : 1970-01-01 00:00:00
handler_name : VideoHandler
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from '2.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: mp41
creation_time : 1970-01-01 00:00:00
Duration: 00:00:04.04, start: 0.000000, bitrate: 1498 kb/s
Stream #1:0(und): Video: mpeg4 (Simple Profile) (mp4v / 0x7634706D), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 1495 kb/s, SAR 349:320 DAR 349:240, 25 fps, 25 tbr, 25 tbn, 25 tbc
Metadata:
creation_time : 1970-01-01 00:00:00
handler_name : VideoHandler
Stream specifier ':1' in filtergraph description [0:1] [0:0] [1:1] [1:0] concat=n=2:v=1:a=1 [v] [a] matches no streams.I googled out but found no solution yet.
Any help is appreciated.
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Problems accessing codecs with ggplot and gganimate
19 décembre 2016, par noLongerRandomUsing gganimate. Can’t figure out how to properly access functionality of ffmpeg, specifically I want to change the codec I’m using in the video file I’m outputting.
# load packages
library(ggplot)
library(animation)
library(gganimate)
# Here's my data.frame
myDf <- data.frame(
year = c(1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014),
bottom50 = c(0.195, 0.191, 0.187, 0.192, 0.196, 0.205, 0.207, 0.210, 0.209, 0.204, 0.203, 0.204, 0.205, 0.203, 0.202, 0.200, 0.200, 0.201, 0.199, 0.195, 0.190, 0.183, 0.179, 0.179, 0.177, 0.172, 0.169, 0.169, 0.168, 0.166, 0.158, 0.159, 0.158, 0.154, 0.151, 0.148, 0.149, 0.148, 0.146, 0.149, 0.148, 0.145, 0.142, 0.138, 0.135, 0.137, 0.137, 0.136, 0.130, 0.127, 0.123, 0.127, 0.125), top1 = c(0.126, 0.127, 0.129, 0.128, 0.126, 0.123, 0.122, 0.115, 0.110, 0.111, 0.111, 0.109, 0.106, 0.105, 0.105, 0.107, 0.108, 0.111, 0.107, 0.110, 0.112, 0.115, 0.125, 0.125, 0.122, 0.133, 0.149, 0.145, 0.145, 0.139, 0.150, 0.146, 0.147, 0.153, 0.160, 0.166, 0.169, 0.177, 0.183, 0.173, 0.171, 0.172, 0.183, 0.194, 0.201, 0.199, 0.195, 0.185, 0.198, 0.196, 0.208, 0.196, 0.202)
)
#Basic plot
p <- ggplot(myDf, aes(x = year, y = bottom50, frame = year)) +
geom_line(color = "dodgerblue") +
geom_line(aes(y = top1), color = "darkred")The non-animated version gets me what I want :
And I get an animation version output to video with :
gganimate(p, interval = .1, title_frame = FALSE, "income.mp4")
That’s fine, but I want to change some the output parameters, specifically : alter the dimensions, the frame rate, and use a different codec.
# change some of the options
ani.options(ani.height = 1080, ani.width = 1920,
interval = 0.04166667, other.opts = "-vcodec qtrle -f mov")
# re-animate
gganimate(p, title_frame = FALSE, "income.mov")That gives me the following error :
Error in animation_saver(saver, filename) :
Don't know how to save animation of type movI’m using ’.mov’ as my file extension because I’m trying to change to the Animation codec (so it’s no longer a .mp4 wrapper). I’ve got ffmpeg installed, so this is probably a syntax issue. But the documentation isn’t very clear here ; gganimate doesn’t have any documentation on changing codecs (or outputting any video besides an mp4), and the animation package is light on specifics as well.