#390: ffplay cannot select desired audio/video stream, consider there is a bug
in
the av_read_frame function
------------------------+---------------------
Reporter: qrtt1 | Owner: michael
Type: defect | Status: new
Priority: important | Component: FFplay
Version: git | Keywords:
Blocked By: | Blocking:
Reproduced: 0 | Analyzed: 0
------------------------+---------------------
There is a mms stream which contains five video/audio streams.
{{{
qty:ffmpeg_bug qrtt1$ ./ffprobe mmsh://media.uvcm.eu/maya4ok
ffprobe version N-31809-g9acffed, Copyright (c) 2007-2011 the FFmpeg
developers
built on Aug 11 2011 03:55:29 with gcc 4.2.1 (Apple Inc. build 5666)
(dot 3)
configuration: --prefix=HERE
libavutil 51. 11. 1 / 51. 11. 1
libavcodec 53. 10. 0 / 53. 10. 0
libavformat 53. 6. 0 / 53. 6. 0
libavdevice 53. 2. 0 / 53. 2. 0
libavfilter 2. 28. 1 / 2. 28. 1
libswscale 2. 0. 0 / 2. 0. 0
[asf @ 0x10104e600] max_analyze_duration 5000000 reached at 5120000
[asf @ 0x10104e600] Estimating duration from bitrate, this may be
inaccurate
Input #0, asf, from 'mmsh://media.uvcm.eu/maya4ok':
Metadata:
WM/ParentalRating: Uploaded by: www.evangelist-online.net
Uploaded by : www.evangelist-online.net
WMFSDKVersion : 10.00.00.4005
WMFSDKNeeded : 0.0.0.0000
IsVBR : 0
genre : Христианское ТВ "Библейский маяк"
title : "1-й комплекс 4-й день"
copyright : ТРК "3 Ангела"
comment : "Вместе веселей"
Duration: N/A, start: 14.120000, bitrate: 1730 kb/s
Stream #0.0: Audio: wmav2, 48000 Hz, 2 channels, s16, 128 kb/s
Stream #0.1: Audio: wmav2, 48000 Hz, 2 channels, s16, 96 kb/s
Stream #0.2: Audio: wmav2, 44100 Hz, 2 channels, s16, 80 kb/s
Stream #0.3: Audio: wmav2, 44100 Hz, 2 channels, s16, 31 kb/s
Stream #0.4: Video: wmv3 (Main), yuv420p, 640x480, 864 kb/s, 1k tbr,
1k tbn, 1k tbc
Stream #0.5: Video: wmv3 (Main), yuv420p, 384x288, 240 kb/s, 1k tbr,
1k tbn, 1k tbc
Stream #0.6: Video: wmv3 (Main), yuv420p, 384x288, 158 kb/s, 1k tbr,
1k tbn, 1k tbc
Stream #0.7: Video: wmv3 (Main), yuv420p, 384x288, 84 kb/s, 1k tbr, 1k
tbn, 1k tbc
Stream #0.8: Audio: wmav2, 8000 Hz, 2 channels, s16, 12 kb/s
Stream #0.9: Video: wmv3 (Main), yuv420p, 192x144, 36 kb/s, 12.50 tbr,
1k tbn, 1k tbc
}}}
I can play it in the default settings, but can't play with the desired
streams,
both video and audio disappear.
{{{
./ffplay -ast 2 -vst 4 mmsh://media.uvcm.eu/maya4ok
}}}
I try to figure out what's wrong with it,
and find the av_read_frame always read the stream index at 8 and 9.
It can reproduce from git source revision
9acffed9e0d7c454b7bc5c947f33cdf8cab3758c (cloned today.)
Just print which index the av_read_frame given.
{{{
qty:ffmpeg_bug qrtt1$ git diff
diff --git a/ffplay.c b/ffplay.c
index b62e9ef..703eac2 100644
--- a/ffplay.c
+++ b/ffplay.c
@@ -2495,6 +2495,8 @@ static int read_thread(void *arg)
continue;
}
ret = av_read_frame(ic, pkt);
+ av_log(NULL, AV_LOG_WARNING, "stream index: %d\n",
pkt->stream_index);
+
if (ret < 0) {
if (ret == AVERROR_EOF || url_feof(ic->pb))
}}}
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/390>
FFmpeg <http://ffmpeg.org>
FFmpeg issue tracker
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