我正在使用https://github.com/WritingMinds/ffmpeg-android-java。
我有一个使用AudioRecord创建的PCM文件。
我现在正在尝试将PCM文件转换为m4a文件。
运行以下命令可以转换它，但它会加速音频，使录音中的声音听起来像花栗鼠。
完成命令：ffmpeg -f s16be -i /storage/emulated/0/GMT/recordTestNew.pcm -strict -2 -y -c：aac -b：176k / storage / emulated / 0 / GMT / recordTestFFMPEG .M4A
哪个给出了
SUCCESS with output : WARNING: linker: /data/user/0/com.globalmedicaltranscriptionapp/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
[s16be @ 0xf72ba000] Estimating duration from bitrate, this may be inaccurate
Guessed Channel Layout for Input Stream #0.0 : mono
Input #0, s16be, from '/storage/emulated/0/GMT/recordTestNew.pcm':
Duration: 00:00:02.70, bitrate: 705 kb/s
Stream #0:0: Audio: pcm_s16be, 44100 Hz, 1 channels, s16, 705 kb/s
Output #0, ipod, to '/storage/emulated/0/GMT/recordTestFFMPEG.m4a':
Metadata:
encoder : Lavf56.4.101
Stream #0:0: Audio: aac (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 128 kb/s
Metadata:
encoder : Lavc56.1.100 aac
Stream mapping:
Stream #0:0 -> #0:0 (pcm_s16be (native) -> aac (native))
Press [q] to stop, [?] for help
size= 30kB time=00:00:01.90 bitrate= 130.0kbits/s
size= 44kB time=00:00:02.71 bitrate= 131.8kbits/s
video:0kB audio:43kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.801121%
音频剪辑实际上应该长约11秒。频率应为11025，编码使用的是Android的AudioFormat.ENCODING_PCM_16BIT，频道正在使用AndioFormat.CHANNEL_IN_DEFAULT。
这是我第一次使用音频，所以这是一场斗争。我使用AudioRecord的原因是因为我需要将音频文件放在允许我拆分它们的形式中，并可能在中间添加新的音频剪辑。
由于频率未传递到输出，这似乎是一个问题。我尝试将上述命令更新为
完成命令：ffmpeg -f s16be -ar 11025 -i /storage/emulated/0/GMT/recordTestNew.pcm -strict -2 -y -c：aac /storage/emulated/0/GMT/recordTestFFMPEG.m4a
哪个给出了
FAILED with output : WARNING: linker: /data/user/0/com.globalmedicaltranscriptionapp/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
[s16be @ 0xf707a000] Estimating duration from bitrate, this may be inaccurate
Guessed Channel Layout for Input Stream #0.0 : mono
Input #0, s16be, from '/storage/emulated/0/GMT/recordTestNew.pcm':
Duration: 00:00:10.81, bitrate: 176 kb/s
Stream #0:0: Audio: pcm_s16be, 11025 Hz, 1 channels, s16, 176 kb/s
[aac @ 0xf7043c00] Too many bits per frame requested
Output #0, ipod, to '/storage/emulated/0/GMT/recordTestFFMPEG.m4a':
Stream #0:0: Audio: aac, 0 channels, 128 kb/s
Metadata:
encoder : Lavc56.1.100 aac
Stream mapping:
Stream #0:0 -> #0:0 (pcm_s16be (native) -> aac (native))
Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
04-11 14：22：23.029 11026-11026 / com.globalmedicaltranscriptionapp D / AudioPlayer：完成命令：ffmpeg -f s16be -ar 11025 -i /storage/emulated/0/GMT/recordTestNew.pcm -strict -2 -y -c：aac /storage/emulated/0/GMT/recordTestFFMPEG.m4a
这样做会使输入看起来具有正确的持续时间和比特率，但后来我得到以下错误。
Stream #0:0 -> #0:0 (pcm_s16be (native) -> aac (native))
Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
我已经尝试了其他一百万个配置，但仍然无法使其正常工作。
我做错了什么？