73 int decoded = pkt.
size;
81 fprintf(stderr,
"Error decoding video frame (%s)\n",
av_err2str(ret));
91 fprintf(stderr,
"Error: Width, height and pixel format have to be "
92 "constant in a rawvideo file, but the width, height or "
93 "pixel format of the input video changed:\n"
94 "old: width = %d, height = %d, format = %s\n"
95 "new: width = %d, height = %d, format = %s\n",
102 printf(
"video_frame%s n:%d coded_n:%d pts:%s\n",
103 cached ?
"(cached)" :
"",
120 fprintf(stderr,
"Error decoding audio frame (%s)\n",
av_err2str(ret));
131 printf(
"audio_frame%s n:%d nb_samples:%d pts:%s\n",
132 cached ?
"(cached)" :
"",
159 int ret, stream_index;
167 fprintf(stderr,
"Could not find %s stream in input file '%s'\n",
172 st = fmt_ctx->
streams[stream_index];
178 fprintf(stderr,
"Failed to find %s codec\n",
187 fprintf(stderr,
"Failed to open %s codec\n",
191 *stream_idx = stream_index;
201 struct sample_fmt_entry {
203 } sample_fmt_entries[] = {
213 struct sample_fmt_entry *entry = &sample_fmt_entries[i];
214 if (sample_fmt == entry->sample_fmt) {
215 *fmt =
AV_NE(entry->fmt_be, entry->fmt_le);
221 "sample format %s is not supported as output format\n",
226 int main (
int argc,
char **argv)
228 int ret = 0, got_frame;
230 if (argc != 4 && argc != 5) {
231 fprintf(stderr,
"usage: %s [-refcount=<old|new_norefcount|new_refcount>] "
232 "input_file video_output_file audio_output_file\n"
233 "API example program to show how to read frames from an input file.\n"
234 "This program reads frames from a file, decodes them, and writes decoded\n"
235 "video frames to a rawvideo file named video_output_file, and decoded\n"
236 "audio frames to a rawaudio file named audio_output_file.\n\n"
237 "If the -refcount option is specified, the program use the\n"
238 "reference counting frame system which allows keeping a copy of\n"
239 "the data for longer than one decode call. If unset, it's using\n"
240 "the classic old method.\n"
245 const char *
mode = argv[1] + strlen(
"-refcount=");
250 fprintf(stderr,
"unknow mode '%s'\n", mode);
264 fprintf(stderr,
"Could not open source file %s\n",
src_filename);
270 fprintf(stderr,
"Could not find stream information\n");
276 video_dec_ctx = video_stream->
codec;
292 fprintf(stderr,
"Could not allocate raw video buffer\n");
313 fprintf(stderr,
"Could not find audio or video stream in the input, aborting\n");
321 frame = avcodec_alloc_frame();
325 fprintf(stderr,
"Could not allocate frame\n");
349 }
while (pkt.
size > 0);
360 printf(
"Demuxing succeeded.\n");
363 printf(
"Play the output video file with the command:\n"
364 "ffplay -f rawvideo -pix_fmt %s -video_size %dx%d %s\n",
376 printf(
"Warning: the sample format the decoder produced is planar "
377 "(%s). This example will output the first channel only.\n",
378 packed ? packed :
"?");
386 printf(
"Play the output audio file with the command:\n"
387 "ffplay -f %s -ac %d -ar %d %s\n",
401 avcodec_free_frame(&frame);