Newest 'ffmpeg' Questions - Stack Overflow
Les articles publiés sur le site
-
Why does ffmpeg never finish when converting a video from my web app ?
30 septembre 2011, par MikeI am trying to convert a video when the user submits a form. It seems to convert ok but the file "is being used by another proccess" when I try to do anything with it. It looks like ffmpeg.exe never exits. My code is below is there anything I should be doing different to allow the process to release the file? If I run this manually it exits fine.
internal class ConversionUtility : Utility { public void Convert(string videoFileName) { var video = new VideoFile(videoFileName); if (!video.infoGathered) GetVideoInfo(video); var Params = string.Format("-y -i \"{0}\" -coder ac -me_method full -me_range 16 -subq 5 -sc_threshold 40 -vcodec libx264 -cmp +chroma -partitions +parti4x4+partp8x8+partb8x8 -i_qfactor 0.71 -keyint_min 25 -b_strategy 1 -g 250 -r 20 \"{1}\"", video.Path, Path.ChangeExtension(videoFileName,".mp4")); //var Params = string.Format("-y -i \"{0}\" -acodec libfaac -ar 44100 -ab 96k -coder ac -me_method full -me_range 16 -subq 5 -sc_threshold 40 -vcodec libx264 -s 1280x544 -b 1600k -cmp +chroma -partitions +parti4x4+partp8x8+partb8x8 -i_qfactor 0.71 -keyint_min 25 -b_strategy 1 -g 250 -r 20 c:\\output3.mp4", video.Path, videoFileName); //var Params = String.Format(" {0} \"{1}\"",this.FFmpegLocation, video.Path); var threadStart = new ParameterizedThreadStart(del => RunProcess(Params)); var thread = new Thread(threadStart); thread.Start(); //RunProcess(Params); } } internal class Utility { public string FFmpegLocation { get; set; } private string WorkingPath { get { return Path.GetDirectoryName(FFmpegLocation); } } protected string RunProcess(string Parameters) { //create a process info var oInfo = new ProcessStartInfo(this.FFmpegLocation, Parameters) { UseShellExecute = false, CreateNoWindow = true, RedirectStandardOutput = true, RedirectStandardError = true }; //Create the output and streamreader to get the output string output = null; StreamReader srOutput = null; //try the process try { //run the process Process proc = System.Diagnostics.Process.Start(oInfo); proc.WaitForExit(); //if (!proc.WaitForExit(10000)) // proc.Kill(); //get the output srOutput = proc.StandardError; //now put it in a string output = srOutput.ReadToEnd(); proc.Close(); } catch (Exception) { output = string.Empty; } finally { //now, if we succeded, close out the streamreader if (srOutput != null) { srOutput.Close(); srOutput.Dispose(); } } return output; } -
Where is libavformat for FFMpeg located on Snow Leopard ?
29 septembre 2011, par d.winHaving an issue with getting a makefile to find the correct libraries and header files for a .c program I'm trying to compile. I'm trying to compile an open source segmenter for Apple's HTTP Live Streaming and it requires libavformat and other FFMpeg libraries to compile. I used Mac Ports to install FFMpeg and when I run "which ffmpeg" at command line, the directory it shows is opt/local/bin/ffmpeg, but after searching around, this doesn't seem to be the directory with the libraries.
It seems that the libraries are located in opt/local/include because that is where I see the header files. Here is my makefile with the suspected directory:
all: gcc -Wall -g live_segmenter.c -o live_segmenter -I/opt/local/include -I/opt/local/bin -I/opt/local/include/libavutil -L/opt/local/include/libavformat -libavformat -L/opt/local/include -libavcodec -L/opt/local/include -libavutil -L/opt/local/include -libavcore -lbz2 -lm -lz -lfaac -lmp3lame -lx264 -lfaad -lpthread
clean: rm -f live_segmenterAnd here is the output after trying to compile:
gcc -Wall -g live_segmenter.c -o live_segmenter -I/opt/local/include -I/opt/local/bin - I/opt/local/include/libavutil -L/opt/local/include/libavformat -libavformat -L/opt/local/include -libavcodec -L/opt/local/include -libavutil -L/opt/local/include -libavcore -lbz2 -lm -lz -lfaac -lmp3lame -lx264 -lfaad -lpthread
ld: library not found for -libavformat collect2: ld returned 1 exit status make: *** [all] Error 1I also tried running "ffmpeg -version" to see if ffmpeg was built correctly and it seems to be so I have run out of ideas on what to do. Any help or point in the right direction would be great. Thank you!
-
Upload audio file, convert bitrate, save to S3 | server side options ?
29 septembre 2011, par Jonathan CoeCurrently using PHP 5.3.x & Fedora
Ok. I'll try to keep this simple. I'm working on a tool that allows the upload & storing of audio files on S3 for playback. Essentially, the user uploads a file (currently only allowing mp3 & m4a) to the server, and the file is then pushed to S3 for storage via the PHP SDK for amazon aws.
The missing link is that I would like to perform a simple bitrate & format conversion of the file prior to uploading the file. (ensuring that all files are 160kbs and .mp3).
I've looked into ffmpeg, although it seems that the PHP library only allows for reading bitrates and other meta, not for actual conversion.
Does anyone have any thoughts on the best way to approach this? Would running a shell_exec() command that performs the conversion be sufficient to do this, or is there a more efficient/better way of doing this?
Thanks in advance! Any help or advice is much appreciated.
-
FFMPEG and CPU utilization [closed]
29 septembre 2011, par user418366Is there a way to either set a maximum CPU utilization for ffmpeg, or (preferably) to run ffmpeg at a lower priority so that it still runs at 100% but gives up CPU to other processes as needed?
I am not sure if this is something I could set in ffmpeg itself or if I need to run some sort of wrapper command or change a system setting.
-
-vf unrecognized with php exec() function
29 septembre 2011, par RajatI am using php to create a video with fade effects. But exec() function gives following output:
array(19) { [0]=> string(67) "FFmpeg version 0.6.1, Copyright (c) 2000-2010 the FFmpeg developers"
[1]=> string(74) " built on Dec 4 2010 15:35:31 with gcc 4.1.2 20080704 (Red Hat 4.1.2-48)"
[2]=> string(649) " configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --mandir=/usr/share/man --incdir=/usr/include --disable-avisynth --extra-cflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic -fPIC' --enable-avfilter --enable-avfilter-lavf --enable-libdirac --enable-libfaac --enable-libfaad --enable-libfaadbin --enable-libgsm --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libx264 --enable-gpl --enable-nonfree --enable-postproc --enable-pthreads --enable-shared --enable-swscale --enable-vdpau --enable-version3 --enable-x11grab"
[3]=> string(35) " libavutil 50.15. 1 / 50.15. 1"
[4]=> string(35) " libavcodec 52.72. 2 / 52.72. 2"
[5]=> string(35) " libavformat 52.64. 2 / 52.64. 2"
[6]=> string(35) " libavdevice 52. 2. 0 / 52. 2. 0"
[7]=> string(35) " libavfilter 1.19. 0 / 1.19. 0"
[8]=> string(35) " libswscale 0.11. 0 / 0.11. 0"
[9]=> string(35) " libpostproc 51. 2. 0 / 51. 2. 0"
[10]=> string(122) "Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/usr/slideshow/frame1.mp4':"
[11]=> string(11) " Metadata:"
[12]=> string(26) " major_brand : isom"
[13]=> string(25) " minor_version : 512"
[14]=> string(35) " compatible_brands: isomiso2mp41"
[15]=> string(33) " encoder : Lavf52.64.2"
[16]=> string(58) " Duration: 00:00:05.00, start: 0.000000, bitrate: 31 kb/s"
[17]=> string(107) " Stream #0.0(und): Video: mpeg4, yuv420p, 320x240 [PAR 1:1 DAR 4:3], 29 kb/s, 1 fps, 1 tbr, 1 tbn, 1 tbc"
[18]=> string(24) "Unrecognized option 'vf'" }
Why it is giving unrecognized option 'vf' while it works fine when run directly on server.My command is : "ffmpeg -i /usr/slideshow/frame1.mp4 -vf 'fade=out:0:5' /usr/slideshow/fade1.mp4"
I am executing it with exec() function. Why the error is coming and what should i use to apply filter to my input video. I am working on CentOS server.
Please guide me...
