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Richard Stallman et le logiciel libre
19 octobre 2011, par
Mis à jour : Mai 2013
Langue : français
Type : Texte
Autres articles (98)
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Vous trouverez dès le départ les dossiers suivants dans votre espace FTP : config/ : dossier de configuration du site IMG/ : dossier des média déjà traités et en ligne sur le site local/ : répertoire cache du site web themes/ : les thèmes ou les feuilles de style personnalisées tmp/ : dossier de travail (...)
Sur d’autres sites (12655)
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Transcoding Mp4 video on Android with FFMPEG
18 octobre 2012, par geeknizerI've compiled FFMPEG binary from Bambuser project (refer question) and have pushed binary and .so files to application directory.
But when I try running FFMPEG with input file, it always complains file not found.
1|root@android:/data/data/com.bambuser.broadcaster # ls
cache libavcodec.so libavfilter.so libswscale.so
ffmpeg libavcore.so libavformat.so tutorial.mp4
lib libavdevice.so libavutil.so
1|root@android:/data/data/com.bambuser.broadcaster # ./ffmpeg -i tutorial.mp4 out.mp4
FFmpeg version UNKNOWN, Copyright (c) 2000-2010 the FFmpeg developers
built on May 8 2012 10:11:37 with gcc 4.4.3
configuration: --target-os=linux --cross-prefix=arm-linux-androideabi- --arch=arm --sysroot=/home/tarandeep/tools/android-ndk/platforms/android-3/arch-arm --soname-prefix=/data/data/com.bambuser.broadcaster/lib/ --enable-shared --disable-symver --enable-small --optimization-flags=-O2 --disable-everything --enable-encoder=mpeg2video --enable-encoder=nellymoser --prefix=../build/ffmpeg/armeabi-v7a --extra-cflags='-march=armv7-a -mfloat-abi=softfp' --extra-ldflags=
libavutil 50.34. 0 / 50.34. 0
libavcore 0.16. 0 / 0.16. 0
libavcodec 52.99. 1 / 52.99. 1
libavformat 52.88. 0 / 52.88. 0
libavdevice 52. 2. 2 / 52. 2. 2
libavfilter 1.69. 0 / 1.69. 0
libswscale 0.12. 0 / 0.12. 0
tutorial.mp4: No such file or directoryI've tried placing file in /sdcard and other locations, I always get same output
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ffmpeg not finding vcodec libx264
30 juillet 2013, par OfeargallI've installed the latest ffmpeg but it seems unable to locate the video codecs. Do I need to completeley remove ffmpeg and re run the
./configure
differently in order for ffmpeg to find the video codecs ?Here's my current configuration :
FFmpeg version git-f61cbc2, Copyright (c) 2000-2011 the FFmpeg developers
built on Jan 18 2011 10:59:49 with gcc 4.0.1 (Apple Inc. build 5465)
configuration: --enable-libmp3lame --enable-shared --disable-mmx --arch=x86_64
libavutil 50.36. 0 / 50.36. 0
libavcore 0.16. 1 / 0.16. 1
libavcodec 52.108. 0 / 52.108. 0
libavformat 52.94. 0 / 52.94. 0
libavdevice 52. 2. 3 / 52. 2. 3
libavfilter 1.74. 0 / 1.74. 0
libswscale 0.12. 0 / 0.12. 0Or, can I just re-run the make command to include the library ?
Here's my snippet for transcoding :
ffmpeg -i ~/Desktop/watercarts.mov -vcodec libx264 -b 250k -bt 50k -acodec libfaac -ab 56k -ac 2 -s 480x320 ~/Desktop/watercartsipod.mp4
And the error :
Unknown encoder 'libx264'
Thank you in advance.
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ffmpeg Too many bits per frame requested
18 novembre 2016, par GRaecuSI am using ffmpeg to convert videos to mp4 format. Everything works fine except with MOV format.
The command I use for everything is :
ffmpeg -i input.mov -strict experimental -sameq -s vga -aspect 1.7777 -vcodec libx264 -preset fast -crf 22 -y output.mp4
but the output I keep getting is :
ffmpeg version 0.9, Copyright (c) 2000-2011 the FFmpeg developers
built on Mar 12 2012 11:01:05 with gcc 4.4.5
configuration: --enable-libx264 --enable-gpl --disable-yasm
libavutil 51. 32. 0 / 51. 32. 0
libavcodec 53. 42. 0 / 53. 42. 0
libavformat 53. 24. 0 / 53. 24. 0
libavdevice 53. 4. 0 / 53. 4. 0
libavfilter 2. 53. 0 / 2. 53. 0
libswscale 2. 1. 0 / 2. 1. 0
libpostproc 51. 2. 0 / 51. 2. 0
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x21767a0] Referenced QT chapter track not found
Seems stream 0 codec frame rate differs from container frame rate: 30.00 (30/1) -> 30.07 (2225/74)
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.mov':
Metadata:
creation_time : 2009-04-04 07:12:29
comment : EASTMAN KODAK COMPANY KODAK Z1275 ZOOM DIGITAL CAMERA
comment-eng : EASTMAN KODAK COMPANY KODAK Z1275 ZOOM DIGITAL CAMERA
Duration: 00:00:17.76, start: 0.000000, bitrate: 8100 kb/s
Stream #0:0(eng): Video: mpeg4 (Advanced Simple Profile) (mp4v / 0x7634706D), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 7968 kb/s, 30.07 fps, 30.07 tbr, 8544k tbn, 30 tbc
Metadata:
creation_time : 2009-04-04 07:12:29
handler_name :
Stream #0:1(eng): Audio: pcm_mulaw (ulaw / 0x77616C75), 16000 Hz, 1 channels, s16, 128 kb/s
Metadata:
creation_time : 2009-04-04 07:12:29
handler_name :
[buffer @ 0x2187f00] w:1280 h:720 pixfmt:yuv420p tb:1/1000000 sar:1/1 sws_param:
[scale @ 0x219c120] w:1280 h:720 fmt:yuv420p -> w:640 h:480 fmt:yuv420p flags:0x4
[libx264 @ 0x2190d20] using SAR=4/3
[libx264 @ 0x2190d20] using cpu capabilities: none!
[libx264 @ 0x2190d20] profile High, level 3.0
[libx264 @ 0x2190d20] 264 - core 120 - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - http://www.videolan.org/x264.html - options: cabac=1 ref=2 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=6 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 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=1 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=30 rc=crf mbtree=1 crf=22.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
[aac @ 0x21917e0] Too many bits per frame requested
Output #0, mp4, to 'output.mp4':
Metadata:
creation_time : 2009-04-04 07:12:29
comment : EASTMAN KODAK COMPANY KODAK Z1275 ZOOM DIGITAL CAMERA
comment-eng : EASTMAN KODAK COMPANY KODAK Z1275 ZOOM DIGITAL CAMERA
Stream #0:0(eng): Video: h264, yuv420p, 640x480 [SAR 4:3 DAR 16:9], q=-1--1, 90k tbn, 30.07 tbc
Metadata:
creation_time : 2009-04-04 07:12:29
handler_name :
Stream #0:1(eng): Audio: aac, 16000 Hz, 1 channels, s16, 128 kb/s
Metadata:
creation_time : 2009-04-04 07:12:29
handler_name :
Stream mapping:
Stream #0:0 -> #0:0 (mpeg4 -> libx264)
Stream #0:1 -> #0:1 (pcm_mulaw -> aac)
Error while opening encoder for output stream #0:1 - maybe incorrect parameters such as bit_rate, rate, width or heightIt seems the problem is with audio’s bit per frame.
Which might be the right solution ?