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Sur d’autres sites (7571)

  • How to convert (re-wrap) Transport Stream to MPEG-4 container in iOS app ?

    28 novembre 2018, par Aleksandr Suvorov

    I have a live stream in .ts format, containing AAC audio and H.264 video. I want to play it on iOS devices. I tried to use a movie player based on FFmpeg to decode and play video, but the audio was lagging.

    Can I rewrap this Transport Stream to an MPEG-4 container to play on iOS devices – without converting it server-side ?

    The server returns me a URL of the .ts live stream and my goal is to play this stream on iOS devices without an .m3u8 playlist because I can’t get it from the server.

  • Reading JPEG in ffmpeg

    23 octobre 2012, par Paul Lammertsma

    I'm trying to get ffmpeg to encode several individual JPEG images into a video on Android. I've successfully built it for Android (see the configuration string at the end of this post).

    I can encode an h.263+ video with randomly generated frame content, and ffmpeg otherwise appears to work well.

    A similar question suggests that the following code should be sufficient to load an image into an AvFrame :

    // Make sure we have the codecs
    
av_register_all();
    

    
AVFormatContext *pFormatCtx;
    
int ret = av_open_input_file(&pFormatCtx, imageFileName, NULL, 0, NULL);
    

    
if (ret != 0) {
    
    printf("Can't open image file '%s': code %d, %s",
    
        imageFileName, ret, strerror(AVERROR(ret)));
    
}

    The above returns the correct absolute file path and error :

    Failed '/sdcard/DCIM/Camera/IMG083.jpg' : code -1094995529, Unknown error : 1094995529

    Incidentally, if I omit av_register_all(), it returns with error 2.

    I've compiled ffmpeg with the following arguments :

    ./configure —target-os=linux
    —prefix=$PREFIX
    —enable-cross-compile
    —extra-libs="-lgcc"
    —arch=arm
    —cc=$PREBUILT/bin/arm-linux-androideabi-gcc
    —cross-prefix=$PREBUILT/bin/arm-linux-androideabi-
    —nm=$PREBUILT/bin/arm-linux-androideabi-nm
    —sysroot=$PLATFORM
    —extra-cflags=" -O3 -fpic -DANDROID -DHAVE_SYS_UIO_H=1 -Dipv6mr_interface=ipv6mr_ifindex -fasm -Wno-psabi -fno-short-enums -fno-strict-aliasing -finline-limit=300 $OPTIMIZE_CFLAGS "
    —enable-shared
    —enable-static
    —extra-ldflags="-Wl,-rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib -nostdlib -lc -lm -ldl -llog"
    —disable-everything
    —enable-demuxer=mov
    —enable-demuxer=h264
    —disable-ffplay
    —enable-protocol=file
    —enable-avformat
    —enable-avcodec
    —enable-decoder=mjpeg
    —enable-decoder=png
    —enable-parser=h264
    —enable-encoder=h263
    —enable-encoder=h263p
    —disable-network
    —enable-zlib
    —disable-avfilter
    —disable-avdevice

    Any suggestions would be most welcome !

  • Reading JPEG in ffmpeg

    16 juillet 2021, par Paul Lammertsma

    I'm trying to get ffmpeg to encode several individual JPEG images into a video on Android. I've successfully built it for Android (see the configuration string at the end of this post).

    



    I can encode an h.263+ video with randomly generated frame content, and ffmpeg otherwise appears to work well.

    



    A similar question suggests that the following code should be sufficient to load an image into an AvFrame :

    



    // Make sure we have the codecs
av_register_all();

AVFormatContext *pFormatCtx;
int ret = av_open_input_file(&pFormatCtx, imageFileName, NULL, 0, NULL);

if (ret != 0) {
    printf("Can't open image file '%s': code %d, %s",
        imageFileName, ret, strerror(AVERROR(ret)));
}


    



    The above returns the correct absolute file path and error :

    



    


    Failed '/sdcard/DCIM/Camera/IMG083.jpg' : code -1094995529, Unknown error : 1094995529

    


    



    Incidentally, if I omit av_register_all(), it returns with error 2.

    



    I've compiled ffmpeg with the following arguments :

    



    

    


    ./configure —target-os=linux 
 —prefix=$PREFIX 
 —enable-cross-compile 
 —extra-libs="-lgcc" 
 —arch=arm 
 —cc=$PREBUILT/bin/arm-linux-androideabi-gcc 
 —cross-prefix=$PREBUILT/bin/arm-linux-androideabi- 
 —nm=$PREBUILT/bin/arm-linux-androideabi-nm 
 —sysroot=$PLATFORM 
 —extra-cflags=" -O3 -fpic -DANDROID -DHAVE_SYS_UIO_H=1 -Dipv6mr_interface=ipv6mr_ifindex -fasm -Wno-psabi -fno-short-enums -fno-strict-aliasing -finline-limit=300 $OPTIMIZE_CFLAGS " 
 —enable-shared 
 —enable-static 
 —extra-ldflags="-Wl,-rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib -nostdlib -lc -lm -ldl -llog" 
 —disable-everything 
 —enable-demuxer=mov 
 —enable-demuxer=h264 
 —disable-ffplay 
 —enable-protocol=file 
 —enable-avformat 
 —enable-avcodec 
 —enable-decoder=mjpeg 
 —enable-decoder=png 
 —enable-parser=h264 
 —enable-encoder=h263 
 —enable-encoder=h263p 
 —disable-network 
 —enable-zlib 
 —disable-avfilter 
 —disable-avdevice

    


    


    



    Any suggestions would be most welcome !

    


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