Problem:
I have a video with these parameters
Input #0, mpegts, from 'videoFiles/Ashbury Heights - Spiders.ts':
Duration: 00:04:03.63, start: 1.368000, bitrate: 1106 kb/s
Program 1
Metadata:
service_name : Service01
service_provider: FFmpeg
Stream #0:0[0x100]: Video: h264 (High) ([27][0][0][0] / 0x001B),
yuv420p(progressive), 720x576 [SAR 64:45 DAR 16:9], 25 fps, 25 tbr, 90k
tbn, 50 tbc
Stream #0:1[0x101]: Audio: aac (LC) ([15][0][0][0] / 0x000F), 32000
Hz, stereo, fltp, 108 kb/s
I have, based on the examples transcode_aac.c, initialised the resampler
and this is what it is being set to
init_resampler Input:3 fltp 32000, Output:3 fltp 44100
So we have a 32000 in and a 44100 out.
Now running my code the video ends at 176 seconds which is
243*(32000/44100), so for some reason my write_audio_frame is not
getting the right pts values.
So looking into the transcode_aac.c code it has this caveat
"/*
* Perform a sanity check so that the number of converted samples is
* not greater than the number of samples to be converted.
* If the sample rates differ, this case has to be handled
differently
*/"
Can someone tell me what I need to do to get this 32000->44100
conversion working correctly. I am using the fifo as in the example but
as I said i run out of audio at 148seconds.
The muxer part is based on muxing.c in the way it uses the PTS to decide
which packet is needed next.
A bit more debug data from the audio thread
Preparing videoFiles/Ashbury Heights - Spiders.ts
init_resampler Input:3 fltp 32000, Output:3 fltp 44100
Output #0, matroska, to 'a.mkv':
Stream #0:0: Video: h264 (Main), yuv420p, 1280x720, q=2-31, 2000
kb/s, 25 tbn
Stream #0:1: Audio: aac (LC), 44100 Hz, stereo, fltp, 128 kb/s
KEY : K pts:126000 pts_time:1.4 dts:118800 dts_time:1.32
duration:3600 duration_time:0.04 stream_index:0
A_RAW: pts:123120 pts_time:1.368 dts:123120 dts_time:1.368
duration:2880 duration_time:0.032 stream_index:1
A_RAW: pts:126000 pts_time:1.4 dts:126000 dts_time:1.4
duration:2880 duration_time:0.032 stream_index:1
A_RAW: pts:128880 pts_time:1.432 dts:128880 dts_time:1.432
duration:2880 duration_time:0.032 stream_index:1
POPped Audio 0 0.02322
POPped Audio 1024 0.02322
A_RAW: pts:131760 pts_time:1.464 dts:131760 dts_time:1.464
duration:2880 duration_time:0.032 stream_index:1
A_RAW: pts:134640 pts_time:1.496 dts:134640 dts_time:1.496
duration:2880 duration_time:0.032 stream_index:1
A_RAW: pts:137520 pts_time:1.528 dts:137520 dts_time:1.528
duration:2880 duration_time:0.032 stream_index:1
A_RAW: pts:140400 pts_time:1.56 dts:140400 dts_time:1.56
duration:2880 duration_time:0.032 stream_index:1
A_RAW: pts:143280 pts_time:1.592 dts:143280 dts_time:1.592
duration:2880 duration_time:0.032 stream_index:1
A_RAW: pts:146160 pts_time:1.624 dts:146160 dts_time:1.624
duration:2880 duration_time:0.032 stream_index:1
A_RAW: pts:149040 pts_time:1.656 dts:149040 dts_time:1.656
duration:2880 duration_time:0.032 stream_index:1
A_RAW: pts:151920 pts_time:1.688 dts:151920 dts_time:1.688
duration:2880 duration_time:0.032 stream_index:1
A_RAW: pts:154800 pts_time:1.72 dts:154800 dts_time:1.72
duration:2880 duration_time:0.032 stream_index:1
A_RAW: pts:157680 pts_time:1.752 dts:157680 dts_time:1.752
duration:2880 duration_time:0.032 stream_index:1
A_RAW: pts:160560 pts_time:1.784 dts:160560 dts_time:1.784
duration:2880 duration_time:0.032 stream_index:1
A_RAW: pts:163440 pts_time:1.816 dts:163440 dts_time:1.816
duration:2880 duration_time:0.032 stream_index:1
A_RAW: pts:166320 pts_time:1.848 dts:166320 dts_time:1.848
duration:2880 duration_time:0.032 stream_index:1
POPped Audio 2048 0.02322
A_RAW: pts:169200 pts_time:1.88 dts:169200 dts_time:1.88
duration:2880 duration_time:0.032 stream_index:1
A_RAW: pts:172080 pts_time:1.912 dts:172080 dts_time:1.912
duration:2880 duration_time:0.032 stream_index:1
A_RAW: pts:174960 pts_time:1.944 dts:174960 dts_time:1.944
duration:2880 duration_time:0.032 stream_index:1
POPped Audio 3072 0.02322
A_RAW: pts:177840 pts_time:1.976 dts:177840 dts_time:1.976
duration:2880 duration_time:0.032 stream_index:1
A_RAW: pts:180720 pts_time:2.008 dts:180720 dts_time:2.008
duration:2880 duration_time:0.032 stream_index:1
A_RAW: pts:183600 pts_time:2.04 dts:183600 dts_time:2.04
duration:2880 duration_time:0.032 stream_index:1
POPped Audio 4096 0.02322
POPped Audio 5120 0.02322
POPped Audio 6144 0.02322
POPped Audio 7168 0.02322
POPped Audio 8192 0.02322
POPped Audio 9216 0.02322
POPped Audio 10240 0.02322
POPped Audio 11264 0.02322
POPped Audio 12288 0.02322
POPped Audio 13312 0.02322
POPped Audio 14336 0.02322
POPped Audio 15360 0.02322
POPped Audio 16384 0.02322
POPped Audio 17408 0.02322
POPped Audio 18432 0.02322
POPped Audio 19456 0.02322
POPped Audio 20480 0.02322
Anyone able to point me at a fix or an example which shows what the
caveat means.
--
BR
Joolz
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