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• Error while opening encoder for output stream #0.0 - maybe incorrect parameters such as bit_rate, rate, width or height

  10 avril 2019, par Pradeep Singh

  I am using this command to convert an avi,mov,m4v video files to flv format via FFMPEG

  /usr/local/bin/ffmpeg -i '/home/public_html/files/video_1355440448.m4v' -s '640x360' -sameq -ab '64k' -ar '44100' -f 'flv' -y /home/public_html/files/video_1355440448.flv
  
  
  
  [flv @ 0x68b1a80] requested bitrate is too low
  
  Output #0, flv, to '/home/files/1355472099-50cadce349290.flv':
  
      Stream #0.0: Video: flv, yuv420p, 640x360, q=2-31, pass 2, 200 kb/s, 90k tbn, 25 tbc
  
      Stream #0.1: Audio: adpcm_swf, 44100 Hz, 2 channels, s16, 64 kb/s
  
  Stream mapping:
  
    Stream #0.0 -> #0.0
  
    Stream #0.1 -> #0.1
  
  Error while opening encoder for output stream #0.0 - maybe incorrect parameters such as bit_rate, rate, width or height
  
  -------------------------------
  
  RESULT
  
  -------------------------------
  
  Execute error. Output for file "/home/public_html/files/video_1355472099.avi" was found, but the file contained no data. Please check the available codecs compiled with FFmpeg can support this type of conversion. You can check the encode decode availability by inspecting the output array from PHPVideoToolkit::getFFmpegInfo().

  But if I manually used this command then its working

  /usr/local/bin/ffmpeg -i '/home/public_html/files/video_1355440448.m4v' -s '640x360' -sameq -ab '64k' -ar '44100' -f 'flv' -y /home/public_html/files/video_1355440448.flv

• gst-ffmpeg building from source failure

  30 juin 2016, par Bharath Vemula

  I’am a non-root user on a cluster and i’am using centos-6.2 , i had to install gst-ffmpeg. i was installing it from source as i was a non-root user in 3 steps as known

  1. ./configure —prefix="my homedirectory"
     2.make
     3.make install

  when i configure it shows all the dependecies have been resolved when i run the make command i get the following error

  > gcc -g -O2 -Wall -Wno-switch -o ffplay ffplay-cmdutils.o
  
  > ffplay-ffplay.o  -lSDL -lpthread libavutil/.libs/libavutil.a
  
  > libavformat/.libs/libavformat.a -ldl libavcodec/.libs/libavcodec.a -lz
  
  > -lm ffplay-ffplay.o: In function `main': /home/internal/evol/sskadam/test/gst-ffmpeg-0.10.1/gst-libs/ext/ffmpeg/ffplay.c:2451:
  
  > undefined reference to `XOpenDisplay'
  
  > /home/internal/evol/sskadam/test/gst-ffmpeg-0.10.1/gst-libs/ext/ffmpeg/ffplay.c:2455:
  
  > undefined reference to `XCloseDisplay' collect2: ld returned 1 exit
  
  > status make[7]: *** [ffplay] Error 1 make[7]: Leaving directory
  
  > `/home/internal/evol/sskadam/test/gst-ffmpeg-0.10.1/gst-libs/ext/ffmpeg'
  
  > make[6]: *** [all-recursive] Error 1 make[6]: Leaving directory
  
  > `/home/internal/evol/sskadam/test/gst-ffmpeg-0.10.1/gst-libs/ext/ffmpeg'
  
  > make[5]: *** [all] Error 2 make[5]: Leaving directory
  
  > `/home/internal/evol/sskadam/test/gst-ffmpeg-0.10.1/gst-libs/ext/ffmpeg'
  
  > make[4]: *** [all-local] Error 2 make[4]: Leaving directory
  
  > `/home/internal/evol/sskadam/test/gst-ffmpeg-0.10.1/gst-libs/ext'
  
  > make[3]: *** [all-recursive] Error 1 make[3]: Leaving directory
  
  > `/home/internal/evol/sskadam/test/gst-ffmpeg-0.10.1/gst-libs/ext'
  
  > make[2]: *** [all-recursive] Error 1 make[2]: Leaving directory
  
  > `/home/internal/evol/sskadam/test/gst-ffmpeg-0.10.1/gst-libs' make[1]:
  
  > *** [all-recursive] Error 1 make[1]: Leaving directory `/home/internal/evol/sskadam/test/gst-ffmpeg-0.10.1' make: *** [all]
  
  > Error 2 [sskadam@ycn1 gst-ffmpeg-0.10.1]$ cd gst-libs/ext/ffmpeg/
  
  > [sskadam@ycn1 ffmpeg]$ vi ffplay.c

  Please help me resolve this

• FFMPEG for Android - missing alsa format

  24 août 2012, par user1545779

  @rowntreerob has an android-ffmpeg implementation that build successfully using the default file settings.

  When you remove disble-avdevice and disbale-devices from the configure_ffmpeg script, ndk-build fails. The following is the error message :

  CP ffmpeg
  STRIP ffmpeg
   /android-ffmpeg/Project/jni
   /android-ffmpeg/Project/jni
   /android-ffmpeg/Project/jni
  jasongipsyblues@android-master : /android-ffmpeg/Project/jni$ ndk-build
  Compile thumb : ffmpeg <= ffmpeg.c
  Compile thumb : ffmpeg <= cmdutils.c
  Executable : ffmpeg
  /home/jasongipsyblues/android-ffmpeg/Project/obj/local/armeabi- >v7a/objs/ffmpeg/ffmpeg/ffmpeg.o : In function `main' :

  /home/jasongipsyblues/android-ffmpeg/Project/jni/ffmpeg/ffmpeg.c:6130 : undefined >reference to `avdevice_register_all'
  

  /home/jasongipsyblues/android-ffmpeg/Project/obj/local/armeabi- >v7a/objs/ffmpeg/ffmpeg/cmdutils.o : In function `print_all_libs_info' :

  /home/jasongipsyblues/android-ffmpeg/Project/jni/ffmpeg/cmdutils.c:639 : undefined >reference to `avdevice_configuration'

  /home/jasongipsyblues/android-ffmpeg/Project/jni/ffmpeg/cmdutils.c:639 : undefined >reference to `avdevice_version'
  
  collect2 : ld returned 1 exit status

  make : ** [/home/jasongipsyblues/android-ffmpeg/Project/obj/local/armeabi-v7a/ffmpeg] >Error 1

  Please pardon my poor formating skills, I still dont get the formating thing. It appears the deletion of the references is to avdevices is definitely affecting the use of ndk-build.

  All the alsa source files exist in the ffmpeg code. How does one build ffmpeg in such a way that alsa is included in the formats ?