无法为“ffmpeg"找到合适的输出格式 [英] unable to find a suitable output format for 'ffmpeg'
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问题描述
我正在使用 ffmpeg android 库.
I am using ffmpeg library for android.
我正在传递一个 ffmpeg 命令，用于将视频格式从 .mp4 转换为 .avi
I am passing one ffmpeg command for convert video format from .mp4 to .avi
ffmpeg -r 20 -i /storage/emulated/0/WisperMedia/WisperVideos/sample.mp4 -b:v 20M /storage/emulated/0/WisperMedia/WisperVideos/output.avi
但我收到类似
09-23 09:29:41.525: E/Home(31343): FAILED with output : ffmpeg version n2.4.2 Copyright (c) 2000-2014 the FFmpeg developers
09-23 09:29:41.525: E/Home(31343): built on Oct 7 2014 15:08:46 with gcc 4.8 (GCC)
09-23 09:29:41.525: E/Home(31343): 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=
09-23 09:29:41.525: E/Home(31343): libavutil 54. 7.100 / 54. 7.100
09-23 09:29:41.525: E/Home(31343): libavcodec 56. 1.100 / 56. 1.100
09-23 09:29:41.525: E/Home(31343): libavformat 56. 4.101 / 56. 4.101
09-23 09:29:41.525: E/Home(31343): libavdevice 56. 0.100 / 56. 0.100
09-23 09:29:41.525: E/Home(31343): libavfilter 5. 1.100 / 5. 1.100
09-23 09:29:41.525: E/Home(31343): libswscale 3. 0.100 / 3. 0.100
09-23 09:29:41.525: E/Home(31343): libswresample 1. 1.100 / 1. 1.100
09-23 09:29:41.525: E/Home(31343): libpostproc 53. 0.100 / 53. 0.100
09-23 09:29:41.525: E/Home(31343): Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/WisperMedia/WisperVideos/sample.mp4':
09-23 09:29:41.525: E/Home(31343): Metadata:
09-23 09:29:41.525: E/Home(31343): major_brand : isom
09-23 09:29:41.525: E/Home(31343): minor_version : 0
09-23 09:29:41.525: E/Home(31343): compatible_brands: isom3gp4
09-23 09:29:41.525: E/Home(31343): creation_time : 2015-09-23 03:50:16
09-23 09:29:41.525: E/Home(31343): Duration: 00:00:01.56, start: 0.000000, bitrate: 14737 kb/s
09-23 09:29:41.525: E/Home(31343): Stream #0:0(eng): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 1280x720, 11819 kb/s, SAR 65536:65536 DAR 16:9, 29.79 fps, 29.92 tbr, 90k tbn, 180k tbc (default)
09-23 09:29:41.525: E/Home(31343): Metadata:
09-23 09:29:41.525: E/Home(31343): rotate : 90
09-23 09:29:41.525: E/Home(31343): creation_time : 2015-09-23 03:50:16
09-23 09:29:41.525: E/Home(31343): handler_name : VideoHandle
09-23 09:29:41.525: E/Home(31343): Side data:
09-23 09:29:41.525: E/Home(31343): displaymatrix: rotation of -90.00 degrees
09-23 09:29:41.525: E/Home(31343): Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 128 kb/s (default)
09-23 09:29:41.525: E/Home(31343): Metadata:
09-23 09:29:41.525: E/Home(31343): creation_time : 2015-09-23 03:50:16
09-23 09:29:41.525: E/Home(31343): handler_name : SoundHandle
09-23 09:29:41.525: E/Home(31343): [NULL @ 0x41f7f420] Unable to find a suitable output format for 'ffmpeg'
09-23 09:29:41.525: E/Home(31343): ffmpeg: Invalid argument
推荐答案
这些类型的错误通常是由 ffmpeg 命令中意外的前导或尾随参数引起的.如果您使用充当 ffmpeg 包装器的第三方库，您必须检查其文档和输出，因为它可能会自动添加参数(例如 ffmpeg 的路径)例如二进制).
These kind of errors are usually caused by unintended leading or trailing arguments in the ffmpeg command. If you are using a third-party library that acts as a wrapper to ffmpeg you must check its documentation and output since it may automatically add arguments (like the path to the ffmpeg binary for example).
在这种特殊情况下，ffmpeg 被视为未知输出.一些可能引发此错误的错误命令包括:
In this particular case ffmpeg is seen as an unknown output. Some incorrect commands that could raise this error include:
ffmpeg -i [输入] -o [输出] ffmpeg ...ffmpeg ffmpeg ...
这篇关于无法为“ffmpeg"找到合适的输出格式的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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