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Editorial Team
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Asked: 2026-05-24T19:20:29+00:00

I’m trying to get ffmpeg to encode several individual JPEG images into a video

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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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1 Answer

  1. Editorial Team

    This error suggests that the decoder needed for JPEG was not built along with ffmpeg. I believe enabling mjpeg is sufficient in order for it to work, but out of frustration I simply enabled everything and it worked.

    I would suggest adding --enable-decoder=mjpeg to the configuration string and rebuilding the library with NDK for Android. If that doesn’t work, remove --disable-everything and individually remove incompatible components until it successfully compiles (I believe just adding --disable-indev worked for Android).

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