El 12/10/15 a las 10:31, gaurav mishra escribió:
Update -
I added some code after my main while loop to flush remaining frames
from codec.
Also i have added one more variable while configuring my encoder ie
gop_size. these two changes have improved the situation.
the lost amount of video has come down to approx 0.9 secs.
/Question- what codec settings i have missed which are required to
make sure that input and output files are identical. /
my current encoder setting code looks like -
c->codec_id = inputStream->codec->codec_id;
c->bit_rate = inputStream->codec->bit_rate;
/* Resolution must be a multiple of two. */
c->width = inputStream->codec->width;
c->height = inputStream->codec->height;
c->gop_size = inputStream->codec->gop_size;
c->time_base = inputStream->codec->time_base;
out_stream->time_base = inputStream->time_base;
av_stream_set_r_frame_rate(out_stream,av_stream_get_r_frame_rate(inputStream));
c->pix_fmt = AV_PIX_FMT_YUV420P;
c->sample_aspect_ratio.num = inputStream->codec->sample_aspect_ratio.num;
c->sample_aspect_ratio.den = inputStream->codec->sample_aspect_ratio.den;
if (oc->oformat->flags & AVFMT_GLOBALHEADER)
c->flags |= CODEC_FLAG_GLOBAL_HEADER;
following are line from ffmpeg -i
*for input file -*
Duration: 00:00:30.92, start: 0.040000, bitrate: 998 kb/s
Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv),
1280x720 [SAR 1:1 DAR 16:9], 996 kb/s, 25 fps, 25 tbr, 25k tbn, 50 tbc
(default)
Metadata:
handler_name : VideoHandler
*for output file - *
Duration: 00:00:30.02, start: 0.000000, bitrate: 1022 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p,
1280x720 [SAR 1:1 DAR 16:9], 1019 kb/s, 25.02 fps, 25 tbr, 25k tbn,
100 tbc (default)
Metadata:
handler_name : VideoHandler
Did not check your code, but your output file has a wrong FPS (25.02)
value and a wrong start value (0.00000).
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