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• ffmpeg "Option preset not found."

  2 février 2015, par PiTheNumber

  I am trying to convert a .mpg to .flv with ffmpeg. On other servers I got it working but here with the ffmpeg clone (avconv) it just does not do it.

  Originally I was working with libfaac and preset fastfirstpass but thats not available in this build so I switched to the experimental acc and preset libx264-fast_firstpass :

  $ /usr/bin/ffmpeg -i /data/upload/videos/original/150128_Test_731_9d5b83.mpg
  
    -strict experimental -acodec aac -ab 128k -ar 44100 -vcodec libx264 -pass 1 
  
    -pre libx264-fast_firstpass -b 512k -s 360x204 
  
    -f flv /data/upload/videos/encoded/150129_Test_731_54f06a.flv
  
  
  
  avconv version 9.16-6:9.16-0ubuntu0.14.04.1, Copyright (c) 2000-2014 the Libav developers
  
    built on Aug 10 2014 18:16:02 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
  
  [mpeg @ 0xc87de0] max_analyze_duration reached
  
  Guessed Channel Layout for  Input Stream #0.1 : stereo
  
  Input #0, mpeg, from '/data/upload/videos/original/150128_Test_731_9d5b83.mpg':
  
    Duration: 00:01:00.12, start: 0.989978, bitrate: 4814 kb/s
  
      Stream #0.0[0x1e0]: Video: mpeg2video (Main), yuv420p, 720x406 [PAR 406:405 DAR 16:9], 104857 kb/s, 23.98 fps, 23.98 tbr, 90k tbn, 47.95 tbc
  
      Stream #0.1[0x1c0]: Audio: mp2, 48000 Hz, stereo, s16p, 224 kb/s
  
  [libx264 @ 0xc8b4c0] using SAR=136/135
  
  [libx264 @ 0xc8b4c0] MB rate (26910000) > level limit (2073600)
  
  [libx264 @ 0xc8b4c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
  
  [libx264 @ 0xc8b4c0] profile Main, level 5.2
  
  [libx264 @ 0xc8b4c0] 264 - core 142 r2389 956c8d8 - H.264/MPEG-4 AVC codec - Copyleft 2003-2014 - http://www.videolan.org/x264.html - options: cabac=1 ref=1 deblock=1:0:0 analyse=0x1:0 me=dia subme=2 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=3 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=1 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=30 rc=abr mbtree=1 bitrate=512 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.25 aq=1:1.00
  
  Option preset not found.

  What does the error in the last line mean ?

  I already made sure the preset libx264-fast_firstpass.avpreset exists in /usr/share/avconv/ and if I change it to invalid ffmpeg complains with Preset invalid specified for stream 0:0, but could not be opened., so the preset is correct.

  Google does provide two results for this error. This chatlog and it’s pastebin about live streaming with the solution to add -f flv and some russian page. Nothing helped.

  Any advice ?

• Android NDK : Getting java.lang.UnsatisfiedLinkError : dlopen failed : cannot locate symbol "signal" referenced by "libffmpeg.so"

  27 février 2015, par Gaganpreet Singh

  I have a video trimmer application code .

  Its Android.mk file code is mentioned below :

  MY_LOCAL_PATH := $(call my-dir)

  include $(all-subdir-makefiles)

  LOCAL_PATH :=$(MY_LOCAL_PATH)
  
  include $(CLEAR_VARS)
  
  LOCAL_MODULE    := video-trimmer
  
  LOCAL_SRC_FILES := video-trimmer.c
  
  LOCAL_C_INCLUDES := $(MY_LOCAL_PATH) $(MY_LOCAL_PATH)/ffmpeg
  
  LOCAL_SHARED_LIBRARIES := ffmpeg 
  
  LOCAL_LDLIBS += -lz -llog
  
  include $(BUILD_SHARED_LIBRARY)

  and Application.mk file code is :

  APP_MODULES      := ffmpeg video-trimmer
  
  APP_OPTIM := debug

  When I try to run this application, I get following error :

  02-26 16:06:05.779: E/AndroidRuntime(4092): FATAL EXCEPTION: main
  
  02-26 16:06:05.779: E/AndroidRuntime(4092): Process: net.video.trimmer, PID: 4092
  
  02-26 16:06:05.779: E/AndroidRuntime(4092): java.lang.UnsatisfiedLinkError: dlopen failed: cannot locate symbol "signal" referenced by "libffmpeg.so"...
  
  02-26 16:06:05.779: E/AndroidRuntime(4092):     at java.lang.Runtime.loadLibrary(Runtime.java:364)
  
  02-26 16:06:05.779: E/AndroidRuntime(4092):     at java.lang.System.loadLibrary(System.java:526)
  
  02-26 16:06:05.779: E/AndroidRuntime(4092):     at net.video.trimmer.service.VideoTrimmingService.onCreate(VideoTrimmingService.java:29)
  
  02-26 16:06:05.779: E/AndroidRuntime(4092):     at android.app.ActivityThread.handleCreateService(ActivityThread.java:2585)
  
  02-26 16:06:05.779: E/AndroidRuntime(4092):     at android.app.ActivityThread.access$1800(ActivityThread.java:139)
  
  02-26 16:06:05.779: E/AndroidRuntime(4092):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1292)
  
  02-26 16:06:05.779: E/AndroidRuntime(4092):     at android.os.Handler.dispatchMessage(Handler.java:102)
  
  02-26 16:06:05.779: E/AndroidRuntime(4092):     at android.os.Looper.loop(Looper.java:136)
  
  02-26 16:06:05.779: E/AndroidRuntime(4092):     at android.app.ActivityThread.main(ActivityThread.java:5086)
  
  02-26 16:06:05.779: E/AndroidRuntime(4092):     at java.lang.reflect.Method.invokeNative(Native Method)
  
  02-26 16:06:05.779: E/AndroidRuntime(4092):     at java.lang.reflect.Method.invoke(Method.java:515)
  
  02-26 16:06:05.779: E/AndroidRuntime(4092):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
  
  02-26 16:06:05.779: E/AndroidRuntime(4092):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
  
  02-26 16:06:05.779: E/AndroidRuntime(4092):     at dalvik.system.NativeStart.main(Native Method)

  My video-trimmer.so and ffmpeg.so are generated in \libs\armeabi .

  Thanks in advance.

• avcodec/hevc_refs : Silence "Could not find ref with POC" for CRA/BLA

  15 mars 2015, par Michael Niedermayer

  avcodec/hevc_refs : Silence "Could not find ref with POC" for CRA/BLA
  Avoids error messages during seeking
  Found-by : cousin_luigi
  
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] libavcodec/hevc_refs.c