mirror of
https://github.com/etlegacy/etlegacy-libs.git
synced 2025-02-25 04:30:42 +00:00
83 lines
2.1 KiB
C
83 lines
2.1 KiB
C
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#include <stdio.h>
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#include <stdlib.h>
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#ifdef _WIN32
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#include <windows.h>
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#else
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typedef long DWORD;
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#endif
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/*extremely crude app to dump vp3 frames from an avi file*/
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/*filenames are hardcoded*/
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#include "avilib.h"
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int main(int argc, const char **argv)
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{
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FILE * f = fopen("outfile.vp3", "wb");
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char * buffer;
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int olength;
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int length;
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avi_t *avifile;
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int chunksize;
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int frame;
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int frames;
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int keyframegap = 0;
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int maxkeyframegap = 0;
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DWORD initialticks;
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int framew = 0;
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int frameh = 0;
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double framerate = 0.0f;
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double fps_numerator, fps_denominator;
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avifile = AVI_open_input_file("vp31.avi", 1);
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frames = AVI_video_frames(avifile);
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framew = AVI_video_width(avifile);
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frameh = AVI_video_height(avifile);
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framerate = AVI_frame_rate(avifile);
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chunksize = AVI_max_video_chunk(avifile);
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/* avilib only reports the max video chunk size if the file has an
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idx table. We fall back to an arbitrary limit otherwise. Better
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would be just to handle the chunks dynamically */
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if (chunksize <= 0) chunksize = 131072;
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buffer = malloc(chunksize);
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printf("Frames(%d) Video(%dx%d) %3.2f fps\n",frames,framew, frameh,framerate);
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printf("Video Compressor: %s", AVI_video_compressor(avifile));
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fps_denominator = 1000000.0F;
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fps_numerator = framerate * fps_denominator;
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sprintf(buffer,"AVI2VP31R W%d H%d F%.0f:%.0f Ip A0:0\n", framew, frameh, fps_numerator, fps_denominator);
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fwrite(buffer, strlen(buffer), 1, f);
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for (frame = 0; frame < frames;) {
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int keyframe;
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olength = length;
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length = AVI_frame_size(avifile, frame++);
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if( !length ) {
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length = olength;
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}
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AVI_read_frame(avifile, (char *) buffer, &keyframe);
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fwrite("FRAME\n", 6, 1, f);
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fwrite(&length, sizeof(int), 1, f);
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fwrite(&keyframe, sizeof(int), 1, f);
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printf("Frame size(%d) IsKeyframe(%d)\n", length, keyframe);
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fwrite(buffer, 1, length, f);
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if (!keyframe){
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keyframegap++;
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} else {
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if (keyframegap>maxkeyframegap) maxkeyframegap=keyframegap;
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keyframegap = 0;
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}
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}
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fclose(f);
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printf("Max keyframegap (%d)\n", maxkeyframegap);
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free(buffer);
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exit(0);
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}
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