id summary reporter owner description type status priority component version resolution keywords cc blockedby blocking reproduced analyzed 2042 av_find_best_stream fails to find best stream for included file DonMoir "http://sms.pangolin.com/temp/av_find_best_stream_fails.ts The above file has 9 streams and 4 programs. All the video streams have AVCodecContext.bit_rate set to zero. So if you use av_find_best_stream to find the video stream it returns 0 which is the worst stream. The 0 stream has a related audio stream which has a sample_rate of 0. For this file, if you first find the best audio stream and then find the related video file it works as expected finding a descent audio and video stream. Typically I don't use av_find_best_stream but I noticed that it had changed so ran some test on it. Probably when a file has programs, av_find_best_stream needs to look thru the programs and analyze the streams for both audio and video independent of the type passed to av_find_best_stream to find the actual best stream. Appears to be a cut file but represents a case that can probably happen. ffplay av_find_best_stream_fails.ts ffplay version N-47062-g26c531c Copyright (c) 2003-2012 the FFmpeg developers built on Nov 25 2012 12:23:20 with gcc 4.7.2 (GCC) configuration: --disable-static --enable-shared --enable-gpl --enable-version3 --disable-pthreads --enable-runtime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-libnut --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libutvideo --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib libavutil 52. 9.100 / 52. 9.100 libavcodec 54. 77.100 / 54. 77.100 libavformat 54. 37.100 / 54. 37.100 libavdevice 54. 3.100 / 54. 3.100 libavfilter 3. 23.102 / 3. 23.102 libswscale 2. 1.102 / 2. 1.102 libswresample 0. 17.101 / 0. 17.101 libpostproc 52. 2.100 / 52. 2.100 [mpeg2video @ 01184b20] mpeg_decode_postinit() failure [mpeg2video @ 011b5240] mpeg_decode_postinit() failure [mpeg2video @ 011f38c0] mpeg_decode_postinit() failure [mpeg2video @ 01184b20] mpeg_decode_postinit() failure Last message repeated 1 times [mpeg2video @ 011f38c0] mpeg_decode_postinit() failure [mpeg2video @ 01184b20] mpeg_decode_postinit() failure [mpeg2video @ 011f38c0] mpeg_decode_postinit() failure [mpeg2video @ 01184b20] mpeg_decode_postinit() failure [mpeg2video @ 011b5240] mpeg_decode_postinit() failure [mpeg2video @ 011f38c0] mpeg_decode_postinit() failure [mpeg2video @ 01184b20] mpeg_decode_postinit() failure Last message repeated 2 times [mpeg2video @ 011f38c0] mpeg_decode_postinit() failure [mpeg2video @ 01184b20] mpeg_decode_postinit() failure [mpeg2video @ 011f38c0] mpeg_decode_postinit() failure [mpeg2video @ 01184b20] mpeg_decode_postinit() failure Last message repeated 1 times [mpeg2video @ 011f38c0] mpeg_decode_postinit() failure [mpeg2video @ 01184b20] mpeg_decode_postinit() failure Last message repeated 2 times [mpeg2video @ 011f38c0] mpeg_decode_postinit() failure [mpeg2video @ 01184b20] mpeg_decode_postinit() failure [mpeg2video @ 011f38c0] mpeg_decode_postinit() failure [mpeg2video @ 01184b20] mpeg_decode_postinit() failure [mpeg2video @ 011f38c0] mpeg_decode_postinit() failure [mpeg2video @ 01184b20] mpeg_decode_postinit() failure Last message repeated 2 times [mpeg2video @ 011f38c0] mpeg_decode_postinit() failure [mpeg2video @ 01184b20] mpeg_decode_postinit() failure [mpeg2video @ 011f38c0] mpeg_decode_postinit() failure [mpeg2video @ 01184b20] mpeg_decode_postinit() failure Last message repeated 1 times [mpeg2video @ 011f38c0] mpeg_decode_postinit() failure [mpeg2video @ 01184b20] mpeg_decode_postinit() failure Last message repeated 1 times [mpeg2video @ 011f38c0] mpeg_decode_postinit() failure [mpeg2video @ 01184b20] mpeg_decode_postinit() failure [mpegts @ 011608e0] Stream #1: not enough frames to estimate rate; consider incr easing probesize [mpegts @ 011608e0] Stream #8: not enough frames to estimate rate; consider incr easing probesize [mpegts @ 011608e0] Could not find codec parameters for stream 1 (Audio: ac3 (AC -3 / 0x332D4341), 0 channels, s16): unspecified sample rate Consider increasing the value for the 'analyzeduration' and 'probesize' options [mpegts @ 011608e0] Could not find codec parameters for stream 8 (Audio: ac3 (AC -3 / 0x332D4341), 0 channels): unspecified sample format Consider increasing the value for the 'analyzeduration' and 'probesize' options [NULL @ 0118aae0] start time is not set in estimate_timings_from_pts [NULL @ 0120f8a0] start time is not set in estimate_timings_from_pts [mpegts @ 011608e0] PES packet size mismatch Last message repeated 2 times Input #0, mpegts, from 'd:\flashfiles\movies\av_find_best_stream_fails.ts': Duration: 00:00:09.11, start: 63323.810800, bitrate: 18418 kb/s Program 2 Stream #0:5[0x21]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p , 704x480 [SAR 10:11 DAR 4:3], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc Stream #0:6[0x24]( ): Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, s1 6, 192 kb/s Stream #0:7[0x25](eng): Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, stereo, s1 6, 192 kb/s Program 3 Stream #0:4[0x31]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p , 704x480 [SAR 10:11 DAR 4:3], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc Stream #0:8[0x34]( ): Audio: ac3 (AC-3 / 0x332D4341), 0 channels Program 4 Stream #0:0[0x41]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p , 704x480 [SAR 10:11 DAR 4:3], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc Stream #0:1[0x164](eng): Audio: ac3 (AC-3 / 0x332D4341), 0 channels, s16 Program 6 Stream #0:3[0x61]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p , 1920x1080 [SAR 1:1 DAR 16:9], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc Stream #0:2[0x64](eng): Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz, 5.1(side), s16, 384 kb/s Invalid sample rate or channel count! Frame changed from size:0x0 to size:704x480 8KB sq= 0B f=0/0 75431.85 A-V: 0.000 fd= 0 aq= 0KB vq= 11KB sq= 0B f=0/0 Invalid sample rate or channel count is displayed since it chose a video stream that had a related audio stream with sample_rate of zero. VLC selected the wrong stream as well. WMP and Media Player Classic selected better streams. " defect new normal avformat unspecified 0 0