FFmpeg版本：N-63893-gc69defd版权所有（c）2000-2014 FFmpeg开发人员 建立于2014年7月16日05:38:01与gcc 4.6（Debian 4.6.3-1）
计算机：Amazon Linux t2.micro（免费套餐）
示例文件：sample_iTunes.mov
示例文件网址：https://support.apple.com/en-us/HT201549
我正在尝试使用字符串数组复制以下FFmpeg命令，然后将此数组传递给Runtime.getRuntime（）。exec（）。
ffmpeg -i file:/var/local/ffmpegtest/media_input/sample_iTunes.mov -pix_fmt yuv420p -c:v libx264 -vtag mp42 -metadata major_brand="mp42" -b:v 8000k -minrate 8000k -maxrate 10000k -ac 2 -strict experimental -c:a aac -b:a 256k -metadata:s:a:0 handler="Stereo" /var/local/ffmpegtest/media_output/sample_iTunes.mp4 -y
注意：当我将完整命令作为单个字符串传递给Runtime.getRuntime（）。exec（）时，这是有效的。
String _cmd = "ffmpeg -i %s -pix_fmt yuv420p -c:v libx264 -vtag mp42 -metadata major_brand=\"mp42\" "
+ "-b:v 8000k -minrate 8000k -maxrate 10000k -ac 2 -strict experimental -c:a aac -b:a 256k -metadata:s:a:0 handler=\"Stereo\" %s -y";
String _ffmpegCommand = String.format(_cmd, _inputFile, _outPutFile);
p = Runtime.getRuntime().exec(_ffmpegCommand);
BufferedReader _reader = new BufferedReader(new InputStreamReader(p.getErrorStream()));
String _line = null;
while((_line = _reader.readLine()) != null) {
lw.writeLine(_logPath + _logName, _line);
System.out.println(_line);
}
我刚开始只有一个基本的参数列表。当我添加添加每个附加参数时，我重新构建JAR文件并将其上传到我的EC2实例以测试任何错误。
以下字符串数组：
try
{
String[] _params = {"ffmpeg",
"-i",
String.format("%s", _inputFile),
"-pix_fmt",
"yuv420p",
"-c:v",
"libx264",
String.format("%s", _outPutFile),
"-y"};
p = Runtime.getRuntime().exec(_params);
BufferedReader _reader = new BufferedReader(new InputStreamReader(p.getErrorStream()));
String _line = null;
while((_line = _reader.readLine()) != null) {
lw.writeLine(_logPath + _logName, _line);
System.out.println(_line);
}
}
catch (Exception e) {
BufferedReader _reader = new BufferedReader(new InputStreamReader(p.getErrorStream()));
String _line = null;
while((_line = _reader.readLine()) != null) {
lw.writeLine(_logPath + _logName, _line);
System.out.println(_line);
}
}
但是，当我继续使用其他参数构建数组时，我开始遇到问题（让我们添加-vtag mp42）：
try
{
String[] _params = {"ffmpeg",
"-i",
String.format("%s", _inputFile),
"-pix_fmt",
"yuv420p",
"-c:v",
"libx264",
"-vtag", // <---- New
"mp42", // <--- New
String.format("%s", _outPutFile),
"-y"};
p = Runtime.getRuntime().exec(_params);
BufferedReader _reader = new BufferedReader(new InputStreamReader(p.getErrorStream()));
String _line = null;
while((_line = _reader.readLine()) != null) {
lw.writeLine(_logPath + _logName, _line);
System.out.println(_line);
}
}
catch (Exception e) {
BufferedReader _reader = new BufferedReader(new InputStreamReader(p.getErrorStream()));
String _line = null;
while((_line = _reader.readLine()) != null) {
lw.writeLine(_logPath + _logName, _line);
System.out.println(_line);
}
}
错误消息：无法为输出文件＃0写入标头（编解码器参数不正确？）：处理输入时找到无效数据
错误跟踪运行的完整日志输出：
29 Jan 2016 03:45:09 UTC - Running FFMpeg...
29 Jan 2016 03:45:09 UTC - Input file: /var/local/ffmpegtest/media_input/sample_iTunes.mov
29 Jan 2016 03:45:09 UTC - Output file: /var/local/ffmpegtest/media_output/sample_iTunes.mp4
29 Jan 2016 03:45:09 UTC - ffmpeg version N-63893-gc69defd Copyright (c) 2000-2014 the FFmpeg developers
29 Jan 2016 03:45:09 UTC - built on Jul 16 2014 05:38:01 with gcc 4.6 (Debian 4.6.3-1)
29 Jan 2016 03:45:09 UTC - configuration: --prefix=/root/ffmpeg-static/64bit --extra-cflags='-I/root/ffmpeg-static/64bit/include -static' --extra-ldflags='-L/root/ffmpeg-static/64bit/lib -static' --extra-libs='-lxml2 -lexpat -lfreetype' --enable-static --disable-shared --disable-ffserver --disable-doc --enable-bzlib --enable-zlib --enable-postproc --enable-runtime-cpudetect --enable-libx264 --enable-gpl --enable-libtheora --enable-libvorbis --enable-libmp3lame --enable-gray --enable-libass --enable-libfreetype --enable-libopenjpeg --enable-libspeex --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-version3 --enable-libvpx
29 Jan 2016 03:45:09 UTC - libavutil 52. 89.100 / 52. 89.100
29 Jan 2016 03:45:09 UTC - libavcodec 55. 66.101 / 55. 66.101
29 Jan 2016 03:45:09 UTC - libavformat 55. 43.100 / 55. 43.100
29 Jan 2016 03:45:09 UTC - libavdevice 55. 13.101 / 55. 13.101
29 Jan 2016 03:45:09 UTC - libavfilter 4. 8.100 / 4. 8.100
29 Jan 2016 03:45:09 UTC - libswscale 2. 6.100 / 2. 6.100
29 Jan 2016 03:45:09 UTC - libswresample 0. 19.100 / 0. 19.100
29 Jan 2016 03:45:09 UTC - libpostproc 52. 3.100 / 52. 3.100
29 Jan 2016 03:45:09 UTC - Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/var/local/ffmpegtest/media_input/sample_iTunes.mov':
29 Jan 2016 03:45:09 UTC - Metadata:
29 Jan 2016 03:45:09 UTC - major_brand : qt
29 Jan 2016 03:45:09 UTC - minor_version : 537199360
29 Jan 2016 03:45:09 UTC - compatible_brands: qt
29 Jan 2016 03:45:09 UTC - creation_time : 2005-10-17 22:54:32
29 Jan 2016 03:45:09 UTC - Duration: 00:01:25.50, start: 0.000000, bitrate: 307 kb/s
29 Jan 2016 03:45:09 UTC - Stream #0:0(eng): Video: mpeg4 (Simple Profile) (mp4v / 0x7634706D), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 261 kb/s, 10 fps, 10 tbr, 3k tbn, 25 tbc (default)
29 Jan 2016 03:45:09 UTC - Metadata:
29 Jan 2016 03:45:09 UTC - creation_time : 2005-10-17 22:54:33
29 Jan 2016 03:45:09 UTC - handler_name : Apple Video Media Handler
29 Jan 2016 03:45:09 UTC - encoder : 3ivx D4 4.5.1
29 Jan 2016 03:45:09 UTC - Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 32000 Hz, mono, fltp, 43 kb/s (default)
29 Jan 2016 03:45:09 UTC - Metadata:
29 Jan 2016 03:45:09 UTC - creation_time : 2005-10-17 22:54:34
29 Jan 2016 03:45:09 UTC - handler_name : Apple Sound Media Handler
29 Jan 2016 03:45:09 UTC - [libx264 @ 0x30c2c00] using SAR=1/1
29 Jan 2016 03:45:09 UTC - [libx264 @ 0x30c2c00] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2 AVX AVX2 FMA3 BMI1 BMI2
29 Jan 2016 03:45:09 UTC - [libx264 @ 0x30c2c00] profile High, level 2.2
29 Jan 2016 03:45:09 UTC - [libx264 @ 0x30c2c00] 264 - core 129 r2230 1cffe9f - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 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=1 lookahead_threads=1 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=2 keyint=250 keyint_min=10 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
29 Jan 2016 03:45:09 UTC - [mp4 @ 0x30c21a0] Tag mp42/0x3234706d incompatible with output codec id '28' ([33][0][0][0])
29 Jan 2016 03:45:09 UTC - Output #0, mp4, to '/var/local/ffmpegtest/media_output/sample_iTunes.mp4':
29 Jan 2016 03:45:09 UTC - Metadata:
29 Jan 2016 03:45:09 UTC - major_brand : qt
29 Jan 2016 03:45:09 UTC - minor_version : 537199360
29 Jan 2016 03:45:09 UTC - compatible_brands: qt
29 Jan 2016 03:45:09 UTC - Stream #0:0(eng): Video: h264 (libx264) (mp42 / 0x3234706D), yuv420p, 640x480 [SAR 1:1 DAR 4:3], q=-1--1, 10 fps, 90k tbn, 10 tbc (default)
29 Jan 2016 03:45:09 UTC - Metadata:
29 Jan 2016 03:45:09 UTC - creation_time : 2005-10-17 22:54:33
29 Jan 2016 03:45:09 UTC - handler_name : Apple Video Media Handler
29 Jan 2016 03:45:09 UTC - encoder : Lavc55.66.101 libx264
29 Jan 2016 03:45:09 UTC - Stream #0:1(eng): Audio: aac (libvo_aacenc), 32000 Hz, mono, s16, 128 kb/s (default)
29 Jan 2016 03:45:09 UTC - Metadata:
29 Jan 2016 03:45:09 UTC - creation_time : 2005-10-17 22:54:34
29 Jan 2016 03:45:09 UTC - handler_name : Apple Sound Media Handler
29 Jan 2016 03:45:09 UTC - encoder : Lavc55.66.101 libvo_aacenc
29 Jan 2016 03:45:09 UTC - Stream mapping:
29 Jan 2016 03:45:09 UTC - Stream #0:0 -> #0:0 (mpeg4 (native) -> h264 (libx264))
29 Jan 2016 03:45:09 UTC - Stream #0:1 -> #0:1 (aac (native) -> aac (libvo_aacenc))
29 Jan 2016 03:45:09 UTC - Could not write header for output file #0 (incorrect codec parameters ?): Invalid data found when processing input