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  • error : undefined reference to 'av_free_packet(AVPacket*)' when use NDK to compile ffmpeg

    23 juin 2015, par wolfz

    I compiled my cpps to use ffmpeg liberary with ANDROID NDK by my android MK as follow :

        LOCAL_PATH := $(call my-dir)
    
    DEFINES += -DTARGET_POSIX \
    
               -DTARGET_LINUX \
    
           -D_LINUX \
    
           -DTARGET_ANDROID \
    
           -D__STDC_CONSTANT_MACROS 
    

    
    include $(CLEAR_VARS)  
    
    LOCAL_MODULE := libavcodec
    
    LOCAL_SRC_FILES := lib/lib/libavcodec.so 
    
    include $(PREBUILT_SHARED_LIBRARY)  
    

    
    include $(CLEAR_VARS)  
    
    LOCAL_MODULE := libavfilter  
    
    LOCAL_SRC_FILES := lib/lib/libavfilter.so 
    
    include $(PREBUILT_SHARED_LIBRARY)  
    

    
    include $(CLEAR_VARS)  
    
    LOCAL_MODULE := libavformat  
    
    LOCAL_SRC_FILES := lib/lib/libavformat.so  
    
    include $(PREBUILT_SHARED_LIBRARY)  
    

    
    include $(CLEAR_VARS)  
    
    LOCAL_MODULE := libavutil  
    
    LOCAL_SRC_FILES := lib/lib/libavutil.so  
    
    include $(PREBUILT_SHARED_LIBRARY)  
    

    
    include $(CLEAR_VARS)  
    
    LOCAL_MODULE := libpostproc  
    
    LOCAL_SRC_FILES := lib/lib/libpostproc.so   
    
    include $(PREBUILT_SHARED_LIBRARY)  
    

    
    include $(CLEAR_VARS)  
    
    LOCAL_MODULE := libswresample  
    
    LOCAL_SRC_FILES := lib/lib/libswresample.so   
    
    include $(PREBUILT_SHARED_LIBRARY)  
    

    
    include $(CLEAR_VARS)  
    
    LOCAL_MODULE := libswscale  
    
    LOCAL_SRC_FILES := lib/lib/libswscale.so
    
    include $(PREBUILT_SHARED_LIBRARY)  
    

    
    include $(CLEAR_VARS)
    
    LOCAL_MODULE:= player
    
    base := $(LOCAL_PATH)
    
    LOCAL_SRC_FILES += cores/PlayDemux.cpp \
    
                   cores/PlayDemuxFFmpeg.cpp \
    
                   cores/PlayFactoryDemuxer.cpp
    

    
    LOCAL_C_INCLUDES += $(LOCAL_PATH) \
    
            $(LOCAL_PATH)/lib \
    
            $(LOCAL_PATH)/lib/include \
    
            $(LOCAL_PATH)/cores/player \
    
    LOCAL_CPPFLAGS += -Wall -fexceptions $(DEFINES)
    
    include $(BUILD_STATIC_LIBRARY)
    

    
    include $(CLEAR_VARS)
    
    LOCAL_MODULE:= testmain
    

    
    LOCAL_SRC_FILES := \
    
        testmain.cpp \
    

    
    LOCAL_C_INCLUDES += $(LOCAL_PATH) \
    
                $(LOCAL_PATH)/lib 
    
    LOCAL_CPPFLAGS += -Wall -fexceptions $(DEFINES)
    

    
    LOCAL_SHARED_LIBRARIES := libavcodec \
    
                libavformat \
    
                libavfilter \
    
                libavutil \
    
                libpostproc \
    
                libswscale \
    
                libswresample 
    

    
    LOCAL_STATIC_LIBRARIES := player 
    

    
    include $(BUILD_EXECUTABLE)

    but when i do "ndk-build v=1", After compiling, I got :

        Install        : libavcodec.so => libs/armeabi-v7a/libavcodec.so
    
    install -p /cygdrive/d/player/obj/local/armeabi-v7a/libavcodec.so /cygdrive/d/player/libs/armeabi-v7a/libavcodec.so
    
    /cygdrive/d/android/android-ndk-r8e/toolchains/arm-linux-androideabi-4.6/prebuilt/windows/bin/arm-linux-androideabi-strip --strip-unneeded D:/player/libs/armeabi-v7a/libavcodec.so
    
    Install        : libavfilter.so => libs/armeabi-v7a/libavfilter.so
    
    install -p /cygdrive/d/player/obj/local/armeabi-v7a/libavfilter.so /cygdrive/d/player/libs/armeabi-v7a/libavfilter.so
    
    /cygdrive/d/android/android-ndk-r8e/toolchains/arm-linux-androideabi-4.6/prebuilt/windows/bin/arm-linux-androideabi-strip --strip-unneeded D:/player/libs/armeabi-v7a/libavfilter.so
    
    Install        : libavformat.so => libs/armeabi-v7a/libavformat.so
    
    install -p /cygdrive/d/player/obj/local/armeabi-v7a/libavformat.so /cygdrive/d/player/libs/armeabi-v7a/libavformat.so
    
    /cygdrive/d/android/android-ndk-r8e/toolchains/arm-linux-androideabi-4.6/prebuilt/windows/bin/arm-linux-androideabi-strip --strip-unneeded D:/player/libs/armeabi-v7a/libavformat.so
    
    Install        : libavutil.so => libs/armeabi-v7a/libavutil.so
    
    install -p /cygdrive/d/player/obj/local/armeabi-v7a/libavutil.so /cygdrive/d/player/libs/armeabi-v7a/libavutil.so
    
    /cygdrive/d/android/android-ndk-r8e/toolchains/arm-linux-androideabi-4.6/prebuilt/windows/bin/arm-linux-androideabi-strip --strip-unneeded D:/player/libs/armeabi-v7a/libavutil.so
    
    Install        : libpostproc.so => libs/armeabi-v7a/libpostproc.so
    
    install -p /cygdrive/d/player/obj/local/armeabi-v7a/libpostproc.so /cygdrive/d/player/libs/armeabi-v7a/libpostproc.so
    
    /cygdrive/d/android/android-ndk-r8e/toolchains/arm-linux-androideabi-4.6/prebuilt/windows/bin/arm-linux-androideabi-strip --strip-unneeded D:/player/libs/armeabi-v7a/libpostproc.so
    
    Install        : libswresample.so => libs/armeabi-v7a/libswresample.so
    
    install -p /cygdrive/d/player/obj/local/armeabi-v7a/libswresample.so /cygdrive/d/player/libs/armeabi-v7a/libswresample.so
    
    /cygdrive/d/android/android-ndk-r8e/toolchains/arm-linux-androideabi-4.6/prebuilt/windows/bin/arm-linux-androideabi-strip --strip-unneeded D:/player/libs/armeabi-v7a/libswresample.so
    
    Install        : libswscale.so => libs/armeabi-v7a/libswscale.so
    
    install -p /cygdrive/d/player/obj/local/armeabi-v7a/libswscale.so /cygdrive/d/player/libs/armeabi-v7a/libswscale.so
    
    /cygdrive/d/android/android-ndk-r8e/toolchains/arm-linux-androideabi-4.6/prebuilt/windows/bin/arm-linux-androideabi-strip --strip-unneeded D:/player/libs/armeabi-v7a/libswscale.so
    
    Executable     : testmain
    
    /cygdrive/d/android/android-ndk-r8e/toolchains/arm-linux-androideabi-4.6/prebuilt/windows/bin/arm-linux-androideabi-g++  -Wl,--gc-sections  -Wl,-z,nocopyreloc  --sysroot=D:/android/android-ndk-r8e/platforms/android-14/arch-arm  D:/player/obj/local/armeabi-v7a/objs/testmain/testmain.o D:/player/obj/local/armeabi-v7a/libplayer.a D:/android/android-ndk-r8e/sources/cxx-stl/stlport/libs/armeabi-v7a/libstlport_static.a -lgcc D:/player/obj/local/armeabi-v7a/libavcodec.so D:/player/obj/local/armeabi-v7a/libavformat.so D:/player/obj/local/armeabi-v7a/libavfilter.so D:/player/obj/local/armeabi-v7a/libavutil.so D:/player/obj/local/armeabi-v7a/libpostproc.so D:/player/obj/local/armeabi-v7a/libswscale.so D:/player/obj/local/armeabi-v7a/libswresample.so  -no-canonical-prefixes -march=armv7-a  -Wl,--fix-cortex-a8  -Wl,--no-undefined -Wl,-z,noexecstack -Wl,-z,relro -Wl,-z,now    -lc -lm  -o D:/player/obj/local/armeabi-v7a/testmain
    
    D:/android/android-ndk-r8e/toolchains/arm-linux-androideabi-4.6/prebuilt/windows/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld.exe: D:/player/obj/local/armeabi-v7a/libplayer.a(PlayDemuxFFmpeg.o): in function PlayDemuxFFmpeg::Flush():D:/player/jni/lib/DllAvCodec.h:144: error: undefined reference to 'av_free_packet(AVPacket*)'

    I´m using windows 7 + cygwin + NDKR8,but the lib "libavcodec.so ,libavfilter.so,libavformat.so,libavutil.so,libpostproc.so,libswresample.so,libswscale.so " of ffmpeg was compiled with standalone mothed of NDK using "ubuntu + NDK8".
    and i include the extern "c" code in the head file.

    so, how to correct the error ?

    my DLLavcodec.h is :

    #pragma once
    
#include "DllAvUtil.h"
    

    
extern "C" {
    
  #include <libavcodec></libavcodec>avcodec.h>
    
}
    

    

    
class DllAvCodec : public DllAvCodecInterface
    
{
    
public:
    
  static CCriticalSection m_critSection;
    

    
  virtual ~DllAvCodec() {}
    
  virtual void avcodec_register_all()
    
  {
    
    ::avcodec_register_all();
    
  }
    
  virtual void avcodec_flush_buffers(AVCodecContext *avctx) { ::avcodec_flush_buffers(avctx); }
    
  virtual int avcodec_open2(AVCodecContext *avctx, AVCodec *codec, AVDictionary **options)
    
  {
    
    return ::avcodec_open2(avctx, codec, options);
    
  }
    
  virtual int avcodec_open2_dont_call(AVCodecContext *avctx, AVCodec *codec, AVDictionary **options) { *(volatile int *)0x0 = 0; return 0; }
    
  virtual int avcodec_close_dont_call(AVCodecContext *avctx) { *(volatile int *)0x0 = 0; return 0; }
    
  virtual AVCodec *avcodec_find_decoder(enum CodecID id) { return ::avcodec_find_decoder(id); }
    
  virtual AVCodec *avcodec_find_encoder(enum CodecID id) { return ::avcodec_find_encoder(id); }
    
  virtual int avcodec_close(AVCodecContext *avctx)
    
  {
    
    return ::avcodec_close(avctx);
    
  }
    
  virtual AVFrame *avcodec_alloc_frame() { return ::avcodec_alloc_frame(); }
    
  virtual int avpicture_fill(AVPicture *picture, uint8_t *ptr, PixelFormat pix_fmt, int width, int height) { return ::avpicture_fill(picture, ptr, pix_fmt, width, height); }
    
  virtual int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture, int *got_picture_ptr, AVPacket *avpkt) { return ::avcodec_decode_video2(avctx, picture, got_picture_ptr, avpkt); }
    
  virtual int avcodec_decode_audio4(AVCodecContext *avctx, AVFrame *frame, int *got_frame_ptr, AVPacket *avpkt) { return ::avcodec_decode_audio4(avctx, frame, got_frame_ptr, avpkt); }
    
  virtual int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub, int *got_sub_ptr, AVPacket *avpkt) { return ::avcodec_decode_subtitle2(avctx, sub, got_sub_ptr, avpkt); }
    
  virtual int avcodec_encode_audio(AVCodecContext *avctx, uint8_t *buf, int buf_size, const short *samples) { return ::avcodec_encode_audio(avctx, buf, buf_size, samples); }
    
  virtual int avcodec_encode_audio2(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr) { return ::avcodec_encode_audio2(avctx, avpkt, frame, got_packet_ptr); }
    
  virtual int avpicture_get_size(PixelFormat pix_fmt, int width, int height) { return ::avpicture_get_size(pix_fmt, width, height); }
    
  virtual AVCodecContext *avcodec_alloc_context3(AVCodec *codec) { return ::avcodec_alloc_context3(codec); }
    
  virtual void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode) { ::avcodec_string(buf, buf_size, enc, encode); }
    
  virtual void avcodec_get_context_defaults3(AVCodecContext *s, AVCodec *codec) { ::avcodec_get_context_defaults3(s, codec); }
    

    
  virtual AVCodecParserContext *av_parser_init(int codec_id) { return ::av_parser_init(codec_id); }
    
  virtual int av_parser_parse2(AVCodecParserContext *s,AVCodecContext *avctx, uint8_t **poutbuf, int *poutbuf_size,
    
                    const uint8_t *buf, int buf_size,
    
                    int64_t pts, int64_t dts, int64_t pos)
    
  {
    
    return ::av_parser_parse2(s, avctx, poutbuf, poutbuf_size, buf, buf_size, pts, dts, pos);
    
  }
    
  virtual void av_parser_close(AVCodecParserContext *s) { ::av_parser_close(s); }
    

    
  virtual AVBitStreamFilterContext *av_bitstream_filter_init(const char *name) { return ::av_bitstream_filter_init(name); }
    
  virtual int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
    
    AVCodecContext *avctx, const char *args,
    
    uint8_t **poutbuf, int *poutbuf_size,
    
    const uint8_t *buf, int buf_size, int keyframe) { return ::av_bitstream_filter_filter(bsfc, avctx, args, poutbuf, poutbuf_size, buf, buf_size, keyframe); }
    
  virtual void av_bitstream_filter_close(AVBitStreamFilterContext *bsfc) { ::av_bitstream_filter_close(bsfc); }
    

    
  virtual void avpicture_free(AVPicture *picture) { ::avpicture_free(picture); }
    
  virtual void av_free_packet(AVPacket *pkt) { ::av_free_packet(pkt); }
    
  virtual int avpicture_alloc(AVPicture *picture, PixelFormat pix_fmt, int width, int height) { return ::avpicture_alloc(picture, pix_fmt, width, height); }
    
  virtual int avcodec_default_get_buffer(AVCodecContext *s, AVFrame *pic) { return ::avcodec_default_get_buffer(s, pic); }
    
  virtual void avcodec_default_release_buffer(AVCodecContext *s, AVFrame *pic) { ::avcodec_default_release_buffer(s, pic); }
    
  virtual enum PixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum PixelFormat *fmt) { return ::avcodec_default_get_format(s, fmt); }
    
  virtual AVCodec *av_codec_next(AVCodec *c) { return ::av_codec_next(c); }
    

    
  virtual int av_dup_packet(AVPacket *pkt) { return ::av_dup_packet(pkt); }
    
  virtual void av_init_packet(AVPacket *pkt) { return ::av_init_packet(pkt); }
    
  virtual int avcodec_fill_audio_frame(AVFrame *frame, int nb_channels, enum AVSampleFormat sample_fmt, const uint8_t *buf, int buf_size, int align) { return ::avcodec_fill_audio_frame(frame, nb_channels, sample_fmt, buf, buf_size, align); }
    
  virtual void avcodec_free_frame(AVFrame **frame) { return ::avcodec_free_frame(frame); };
    
};

  • Converting Real Media with ffmpeg

    7 août 2013, par Eric Arenson

    I have a number of old crusty Real Media files I need to convert and was hoping to write a script to batch process them. I'm able to do a Real Media -> AVI conversion with FFMpegX, but when I try to replicate the conversion with ffmpeg, it always errors out with something like :

    [avi @ 0x10084fa00] Too large number of skipped frames 117425 > 60000

    It may have something to do with the funky format of these Real Media files :

    Duration: 01:28:23.42, start: 0.000000, bitrate: 448 kb/s
    
    Stream #0:0: Data: none, 32 kb/s
    
    Stream #0:1: Data: none, 192 kb/s
    
    Stream #0:2: Audio: sipr (sipr / 0x72706973), 8000 Hz, mono, flt, 6 kb/s
    
    Stream #0:3: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 13 kb/s, 15 fps, 15 tbr, 1k tbn, 1k tbc
    
    Stream #0:4: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 8 kb/s, 15 fps, 15 tbr, 1k tbn, 1k tbc
    
    Stream #0:5: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 5 kb/s, 15 fps, 15 tbr, 1k tbn, 1k tbc
    
    Stream #0:6: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 27 kb/s, 15 fps, 15 tbr, 1k tbn, 1k tbc
    
    Stream #0:7: Audio: cook (cook / 0x6B6F6F63), 22050 Hz, mono, fltp, 32 kb/s
    
    Stream #0:8: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 192 kb/s, 30 fps, 30 tbr, 1k tbn, 1k tbc
    
    Stream #0:9: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 136 kb/s, 30 fps, 30 tbr, 1k tbn, 1k tbc
    
    Stream #0:10: Audio: sipr (sipr / 0x72706973), 8000 Hz, mono, flt, 6 kb/s
    
    Stream #0:11: Audio: sipr (sipr / 0x72706973), 8000 Hz, mono, flt, 6 kb/s
    
    Stream #0:12: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 13 kb/s, 15 fps, 15 tbr, 1k tbn, 1k tbc
    
    Stream #0:13: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 13 kb/s, 15 fps, 15 tbr, 1k tbn, 1k tbc
    
    Stream #0:14: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 13 kb/s, 15 fps, 15 tbr, 1k tbn, 1k tbc
    
    Stream #0:15: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 5 kb/s, 15 fps, 15 tbr, 1k tbn, 1k tbc

    Does anyone have any tips on either how to find out what FFMpegX is doing to make the conversion work, or a better way to go about using ffmpeg to do this ?

    EDIT

    Including the ffmpeg command (thank you to @Mondain for teaching me about the stream mapping !) and output :

    Command :

    ffmpeg -i cc121307pm.rm -map 0:8 -map 0:7 -c:v libx264 -c:a libfaac -b:a 32k test.avi

    Output :

    ffmpeg version 1.2.1 Copyright (c) 2000-2013 the FFmpeg developers
    
  built on Aug  7 2013 12:29:30 with gcc 4.2.1 (GCC) (Apple Inc. build 5664)
    
  configuration: --prefix=/usr/local/Cellar/ffmpeg/1.2.1 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables --enable-avresample --enable-vda --cc=/usr/bin/gcc-4.2 --host-cflags=&#39;-Os -w -pipe -march=core2 -msse4.1 -mmacosx-version-min=10.6&#39; --host-ldflags=-L/usr/local/lib --enable-libx264 --enable-libfaac --enable-libmp3lame --enable-libxvid
    
  libavutil      52. 18.100 / 52. 18.100
    
  libavcodec     54. 92.100 / 54. 92.100
    
  libavformat    54. 63.104 / 54. 63.104
    
  libavdevice    54.  3.103 / 54.  3.103
    
  libavfilter     3. 42.103 /  3. 42.103
    
  libswscale      2.  2.100 /  2.  2.100
    
  libswresample   0. 17.102 /  0. 17.102
    
  libpostproc    52.  2.100 / 52.  2.100
    
[rm @ 0x10180f200] Unsupported stream type 00000265
    
[rm @ 0x10180f200] Unsupported stream type 00000652
    
[rm @ 0x10180f200] max_analyze_duration 5000000 reached at 5004000 microseconds
    
Input #0, rm, from &#39;input.rm&#39;:
    
  Metadata:
    
    File ID         : 41deac0f-94fb-3595-325c-c717943bc532
    
    Content Rating  : (PICS-1.1 "http://www.classify.org/safesurf" labels comment "RealProducer Plus 8.5.0.200 Windows" ratings (SS~~000 1))
    
    Modification Date: 12/13/2007 16:26:16
    
    Generated By    : RealProducer Plus 8.5.0.200 Windows
    
    Keywords        : 
    
    Abstract        : 
    
    Target Audiences: 28K Modem (20 Kbps);56K Modem (34 Kbps);256K DSL/Cable Modem (225 Kbps);
    
    Video Quality   : Normal Motion Video
    
    Audio Format    : Voice Only
    
    Creation Date   : 12/13/2007 14:57:49
    
    ASMRuleBook     : #($Bandwidth &lt; 15000),Stream2Bandwidth = 6500, Stream3Bandwidth = 5499;#($Bandwidth >= 15000) &amp;&amp; ($Bandwidth &lt; 20000),Stream2Ba
    
    title           : 
    
    author          : 
    
    copyright       : ?2007
    
    comment         : 
    
  Duration: 01:28:23.42, start: 0.000000, bitrate: 448 kb/s
    
    Stream #0:0: Data: none, 32 kb/s
    
    Stream #0:1: Data: none, 192 kb/s
    
    Stream #0:2: Audio: sipr (sipr / 0x72706973), 8000 Hz, mono, flt, 6 kb/s
    
    Stream #0:3: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 13 kb/s, 15 fps, 15 tbr, 1k tbn, 1k tbc
    
    Stream #0:4: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 8 kb/s, 15 fps, 15 tbr, 1k tbn, 1k tbc
    
    Stream #0:5: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 5 kb/s, 15 fps, 15 tbr, 1k tbn, 1k tbc
    
    Stream #0:6: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 27 kb/s, 15 fps, 15 tbr, 1k tbn, 1k tbc
    
    Stream #0:7: Audio: cook (cook / 0x6B6F6F63), 22050 Hz, mono, fltp, 32 kb/s
    
    Stream #0:8: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 192 kb/s, 30 fps, 30 tbr, 1k tbn, 1k tbc
    
    Stream #0:9: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 136 kb/s, 30 fps, 30 tbr, 1k tbn, 1k tbc
    
    Stream #0:10: Audio: sipr (sipr / 0x72706973), 8000 Hz, mono, flt, 6 kb/s
    
    Stream #0:11: Audio: sipr (sipr / 0x72706973), 8000 Hz, mono, flt, 6 kb/s
    
    Stream #0:12: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 13 kb/s, 15 fps, 15 tbr, 1k tbn, 1k tbc
    
    Stream #0:13: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 13 kb/s, 15 fps, 15 tbr, 1k tbn, 1k tbc
    
    Stream #0:14: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 13 kb/s, 15 fps, 15 tbr, 1k tbn, 1k tbc
    
    Stream #0:15: Video: rv20 (RV20 / 0x30325652), yuv420p, 320x240, 5 kb/s, 15 fps, 15 tbr, 1k tbn, 1k tbc
    
[libx264 @ 0x101889c00] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.1 Cache64
    
[libx264 @ 0x101889c00] profile High, level 1.3
    
Output #0, avi, to &#39;test.avi&#39;:
    
  Metadata:
    
    File ID         : 41deac0f-94fb-3595-325c-c717943bc532
    
    Content Rating  : (PICS-1.1 "http://www.classify.org/safesurf" labels comment "RealProducer Plus 8.5.0.200 Windows" ratings (SS~~000 1))
    
    Modification Date: 12/13/2007 16:26:16
    
    Generated By    : RealProducer Plus 8.5.0.200 Windows
    
    Keywords        : 
    
    Abstract        : 
    
    Target Audiences: 28K Modem (20 Kbps);56K Modem (34 Kbps);256K DSL/Cable Modem (225 Kbps);
    
    Video Quality   : Normal Motion Video
    
    Audio Format    : Voice Only
    
    Creation Date   : 12/13/2007 14:57:49
    
    ASMRuleBook     : #($Bandwidth &lt; 15000),Stream2Bandwidth = 6500, Stream3Bandwidth = 5499;#($Bandwidth >= 15000) &amp;&amp; ($Bandwidth &lt; 20000),Stream2Ba
    
    INAM            : 
    
    author          : 
    
    ICOP            : ?2007
    
    ICMT            : 
    
    ISFT            : Lavf54.63.104
    
    Stream #0:0: Video: h264 (H264 / 0x34363248), yuv420p, 320x240, q=-1--1, 30 tbn, 30 tbc
    
    Stream #0:1: Audio: aac ([255][0][0][0] / 0x00FF), 22050 Hz, mono, s16, 32 kb/s
    
Stream mapping:
    
  Stream #0:8 -> #0:0 (rv20 -> libx264)
    
  Stream #0:7 -> #0:1 (cook -> libfaac)
    
Press [q] to stop, [?] for help
    
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input.rm: Input/output error
    
frame=    0 fps=0.0 q=0.0 Lsize=      10kB time=00:00:00.00 bitrate=N/A    
    
video:0kB audio:0kB subtitle:0 global headers:0kB muxing overhead inf%
    
Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)

  • Optical Drive Value Proposition

    28 août 2010, par Multimedia Mike — General

    I have the absolute worst luck in the optical drive department. Ever since I started building my own computers in 1995 — close to the beginning of the CD-ROM epoch — I have burned through a staggering number of optical drives. Seriously, especially in the time period between about 1995-1998, I was going through a new drive every 4-6 months or so. This was also during that CD-ROM speed race where the the drive packages kept advertising loftier ‘X’ speed ratings. I didn’t play a lot of CD-ROM games during that timeframe, though I did listen to quite a few audio CDs through the computer.



    I use “optical drive” as a general term to describe CD-ROM drives, CD-R/RW drives, DVD-ROM drives, DVD-R/RW drives, and drives capable of doing any combination of reading and writing CDs and DVDs. In my observation, optical media seems to be falling out of favor somewhat, giving way to online digital distribution for things like games and software, as well as flash drives and external hard drives vs. recordable or rewritable media for backup and sneakernet duty. Somewhere along the line, I started to buy computers that didn’t even have optical drives. That’s why I have purchased at least 2 external USB drives (seen in the picture above). I don’t have much confidence that either works correctly. My main desktop until recently, a Mac Mini, has an internal optical drive that grew flaky and unreliable a few months after the unit was purchased.

    I just have really rotten luck with optical drives. The most reliable drive in my house is the one on the headless machine that, until recently, was the main workhorse on the FATE farm. The eject switch didn’t work correctly so I have to log in remotely, 'sudo eject', walk to the other room, pop in the disc, walk back to the other room, and work with the disc.

    Maybe optical media is on its way out, but I still have many hundreds of CD-ROMs. Perhaps I should move forward on this brainstorm to archive all of my optical discs on hard drives (and then think of some data mining experiments, just for the academic appeal), before it’s too late ; optical discs don’t last forever.

    So if I needed a good optical drive, what should I consider ? I’ve always been the type to go cheap, I admit. Many of my optical drives were on the lower end of the cost spectrum, which might have played some role in their rapid replacement. However, I’m not sold on the idea that I’m getting quality just because I’m paying a higher price. That LG unit at the top of the pile up there was relatively pricey and still didn’t fare well in the long (or even medium) term.

    Come to think of it, I used to have a ridiculous stockpile of castoff (but somehow still functional) optical drives. So many, in fact, that in 2004 I had a full size PC tower that I filled with 4 working drives, just because I could. Okay, I admit that there was a period where I had some reliable drives.

    That might be an idea, actually– throw together such a computer for heavy duty archival purposes. I visited Weird Stuff Warehouse today (needed some PC100 RAM for an old machine and they came through) and I think I could put together such a box rather cheaply.

    It’s a dirty job, but… well, you know the rest.

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