April 2012 - FFmpeg-trac - lists.ffmpeg.org

#1136(undetermined:new): FFmpeg spring banner 2012
by FFmpeg 03 Apr '12

03 Apr '12

#1136: FFmpeg spring banner 2012 -------------------------------------+------------------------------------- Reporter: beastd | Owner: beastd Type: task | Status: new Priority: minor | Component: Version: | undetermined unspecified | Keywords: banner Blocked By: | spring logo website 2012 Reproduced by developer: 0 | Blocking: | Analyzed by developer: 0 -------------------------------------+------------------------------------- Put up a spring banner on the FFmpeg website. A banner has been composed as a GCI task. The produced assets and history can be seen here: http://www.google-melange.com/gci/task/view/google/gci2011/7204204 I cropped and rescaled the work and made a patch for the web pages. Please try it out and give feed back. -- Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1136> FFmpeg <http://ffmpeg.org> FFmpeg issue tracker

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#1164(undetermined:new): Wrong start: for mpegts output
by FFmpeg 03 Apr '12

03 Apr '12

#1164: Wrong start: for mpegts output --------------------------------------+---------------------------------- Reporter: zimbatm | Type: defect Status: new | Priority: normal Component: undetermined | Version: 0.10.2 Keywords: | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | --------------------------------------+---------------------------------- For some reason, all videos that are converted to .ts have a start of 1.400000. This seem not to be a new issue, searching for that value shows other unrelated tickets having it: https://ffmpeg.org/trac/ffmpeg/search?q=1.400000 I tested this behavior on ffmpeg 0.10.2 but it also happens before and works with any video I tested with. For good figure, here is a recorded terminal session that shows the issue: https://gist.github.com/59e13c20c1f6ae51a246 -- Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1164> FFmpeg <http://ffmpeg.org> FFmpeg issue tracker

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#810(avformat:new): Muxing MXF audio only files leads to a floating point exception
by FFmpeg 03 Apr '12

03 Apr '12

#810: Muxing MXF audio only files leads to a floating point exception --------------------------------------+---------------------------------- Reporter: ubitux | Owner: Type: defect | Status: new Priority: normal | Component: avformat Version: git-master | Keywords: mxf Blocked By: | Blocking: Reproduced by developer: 0 | Analyzed by developer: 0 --------------------------------------+---------------------------------- Steps to reproduce: {{{ % make tests/audiogen % ./tests/audiogen a.sw 48000 2 % ./ffmpeg -ar 48000 -ac 2 -i a.sw -y a.mxf }}} Backtrace: {{{ (gdb) r Starting program: /home/ubitux/proj/ffmpeg/ffmpeg_g -ar 48000 -ac 2 -i a.sw -y a.mxf [Thread debugging using libthread_db enabled] ffmpeg version N-36003-gf27930c, Copyright (c) 2000-2011 the FFmpeg developers built on Dec 21 2011 00:07:07 with gcc 4.6.2 20111125 (prerelease) configuration: --enable-gpl --enable-libmp3lame --enable-libvorbis --enable-libxvid --enable-libx264 --enable-libvpx --enable-libtheora --enable-x11grab --enable-libopenjpeg --enable-version3 --enable- libmodplug --enable-libass --cc='ccache cc' libavutil 51. 32. 0 / 51. 32. 0 libavcodec 53. 46. 1 / 53. 46. 1 libavformat 53. 27. 0 / 53. 27. 0 libavdevice 53. 4. 0 / 53. 4. 0 libavfilter 2. 53. 0 / 2. 53. 0 libswscale 2. 1. 0 / 2. 1. 0 libpostproc 51. 2. 0 / 51. 2. 0 [s16le @ 0x141d840] Estimating duration from bitrate, this may be inaccurate Input #0, s16le, from 'a.sw': Duration: N/A, start: 0.000000, bitrate: N/A Stream #0:0: Audio: pcm_s16le, 48000 Hz, 2 channels, s16, 1536 kb/s Output #0, mxf, to 'a.mxf': Metadata: encoder : Lavf53.27.0 Stream #0:0: Audio: pcm_s16le, 48000 Hz, 2 channels, s16, 1536 kb/s Stream mapping: Stream #0:0 -> #0:0 (pcm_s16le -> pcm_s16le) Press [q] to stop, [?] for help Program received signal SIGFPE, Arithmetic exception. 0x0000000000a9ec0b in av_rescale_rnd (a=<optimized out>, b=0, c=0, rnd=<optimized out>) at libavutil/mathematics.c:91 91 return (a * b + r)/c; (gdb) bt #0 0x0000000000a9ec0b in av_rescale_rnd (a=<optimized out>, b=0, c=0, rnd=<optimized out>) at libavutil/mathematics.c:91 #1 0x0000000000553acb in ff_interleave_new_audio_packet (flush=0, stream_index=0, pkt=0x7fffffffbfa0, s=<optimized out>) at libavformat/audiointerleave.c:87 #2 ff_audio_rechunk_interleave (s=0x1425c80, out=0x7fffffffc050, pkt=0x0, flush=0, get_packet=0x502fd0 <mxf_interleave_get_packet>, compare_ts=0x502f60 <mxf_compare_timestamps>) at libavformat/audiointerleave.c:132 #3 0x0000000000543175 in interleave_packet (flush=0, in=0x7fffffffc300, out=0x7fffffffc050, s=<optimized out>) at libavformat/utils.c:3454 #4 av_interleaved_write_frame (s=0x1425c80, pkt=0x7fffffffc300) at libavformat/utils.c:3477 #5 0x00000000004466d5 in write_frame (s=0x1425c80, pkt=0x7fffffffc300, avctx=0x141e860, bsfc=0x0) at ffmpeg.c:833 #6 0x0000000000448ec9 in do_audio_out (ist=0x141dd90, ost=0x1424830, s=0x1425c80, decoded_frame=<optimized out>) at ffmpeg.c:1072 #7 transcode_audio (got_output=0x7fffffffc3c8, pkt=0x7fffffffc2a0, ist=0x141dd90) at ffmpeg.c:1838 #8 output_packet (ist=<optimized out>, ost_table=0x1424830, nb_ostreams=<optimized out>, pkt=<optimized out>) at ffmpeg.c:2043 #9 0x000000000044b72e in transcode (output_files=0x1424b00, nb_output_files=1, input_files=0x1424c10, nb_input_files=0) at ffmpeg.c:2804 #10 0x00000000004432a2 in main (argc=<optimized out>, argv=0x7fffffffe698) at ffmpeg.c:4885 (gdb) }}} The time base seems to be set only with when a video stream is specified, so trying to rescale it in case of audio only leads to a floating exception. The issue might also be reproducible with data or subtitles muxing without video. -- Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/810> FFmpeg <http://ffmpeg.org> FFmpeg issue tracker

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#1096(undetermined:new): cavs: crash
by FFmpeg 02 Apr '12

02 Apr '12

#1096: cavs: crash -------------------------------------+------------------------------------- Reporter: ami_stuff | Type: defect Status: new | Priority: normal Component: | Version: undetermined | unspecified Keywords: | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | -------------------------------------+------------------------------------- the input file may be broken, see ticket #1095 {{{ ffmpeg -i 320.png -vcodec libxavs out.mov }}} {{{ (gdb) r -i out.mov -r 25 out2.mov Starting program: d:\mingw\msys\1.0\ffmpeg\ffmpeg_g.exe -i out.mov -r 25 out2.mov [New Thread 3220.0xc98] ffmpeg version 0.9.1.git Copyright (c) 2000-2012 the FFmpeg developers built on Mar 10 2012 16:15:15 with gcc 4.6.1 configuration: --disable-yasm --disable-ffprobe libavutil 51. 42.100 / 51. 42.100 libavcodec 54. 10.100 / 54. 10.100 libavformat 54. 2.100 / 54. 2.100 libavdevice 53. 4.100 / 53. 4.100 libavfilter 2. 63.100 / 2. 63.100 libswscale 2. 1.100 / 2. 1.100 libswresample 0. 7.100 / 0. 7.100 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'out.mov': Metadata: major_brand : qt minor_version : 512 compatible_brands: qt encoder : Lavf54.2.100 Duration: 00:00:00.04, start: 0.000000, bitrate: 321 kb/s Stream #0:0(eng): Video: cavs (avs2 / 0x32737661), yuv420p, 320x240, 167 kb/ s, 50 fps, 25 tbn, 25 tbc Metadata: handler_name : ♂DataHandler w:320 h:240 pixfmt:yuv420p tb:1/1000000 sar:0/1 sws_param: Output #0, mov, to 'out2.mov': Metadata: major_brand : qt minor_version : 512 compatible_brands: qt encoder : Lavf54.2.100 Stream #0:0(eng): Video: mpeg4 (mp4v / 0x7634706D), yuv420p, 320x240, q=2-31 , 200 kb/s, 25 tbn, 25 tbc Metadata: handler_name : ♂DataHandler Stream mapping: Stream #0:0 -> #0:0 (cavs -> mpeg4) Press [q] to stop, [?] for help [cavs @ 03dd0920] weighted prediction not yet supported Program received signal SIGSEGV, Segmentation fault. 0x00956cb5 in ff_cavs_init_mb (h=0x3e15a80) at libavcodec/cavs.c:542 542 h->mv[MV_FWD_B2+i] = h->top_mv[0][h->mbx*2+i]; (gdb) bt #0 0x00956cb5 in ff_cavs_init_mb (h=0x3e15a80) at libavcodec/cavs.c:542 #1 0x0070c89f in decode_mb_i (h=0x3e15a80, cbp_code=0) at libavcodec/cavsdec.c:201 #2 0x007102a5 in decode_pic (h=0x3e15a80) at libavcodec/cavsdec.c:558 #3 cavs_decode_frame (avctx=0x3dd0920, data=0x3873e00, data_size=0x22de20, avpkt=0x22dbc8) at libavcodec/cavsdec.c:690 #4 0x004f9770 in avcodec_decode_video2 (avctx=0x3dd0920, picture=0x3873e00, got_picture_ptr=0x22de20, avpkt=0x22dd30) at libavcodec/utils.c:1351 #5 0x004069cb in transcode_video (pkt_pts=<optimized out>, got_output=<optimized out>, pkt=<optimized out>, ist=<optimized out>) at ffmpeg.c:2102 #6 output_packet (ist=0x3871da0, ost_table=0x3863820, nb_ostreams=1, pkt=0x22fb28) at ffmpeg.c:2270 #7 0x0040bf3b in transcode (output_files=0x38716c0, nb_output_files=1, input_files=0x3871e60, nb_input_files=1) at ffmpeg.c:3082 #8 0x0022ff48 in ?? () Backtrace stopped: Not enough registers or memory available to unwind further }}} -- Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1096> FFmpeg <http://ffmpeg.org> FFmpeg issue tracker

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#401(avcodec:new): ffmpeg fails to decode MJPG in AVI
by FFmpeg 01 Apr '12

01 Apr '12

#401: ffmpeg fails to decode MJPG in AVI ------------------------+-------------------------- Reporter: rectalogic | Type: defect Status: new | Priority: normal Component: avcodec | Version: unspecified Keywords: | Blocked By: Blocking: | Reproduced: 0 Analyzed: 0 | ------------------------+-------------------------- ffmpeg fails to decode MJPG in AVI, sample is at http://www.box.net/shared/fqqufn3ul5dlkheyu40r mplayer successfully decodes and plays this sample. {{{ $ ./ffmpeg -i /storage/test/mencoder/mjpg.avi -vcodec rawvideo -pix_fmt uyvy422 -vtag yuvs -an -f mov -y /tmp/o.mov ffmpeg version N-31890-gecaf514, Copyright (c) 2000-2011 the FFmpeg developers built on Aug 16 2011 14:34:59 with gcc 4.4.3 configuration: --enable-debug=gdb3 --disable-optimizations --disable-asm --disable-stripping libavutil 51. 12. 0 / 51. 12. 0 libavcodec 53. 10. 0 / 53. 10. 0 libavformat 53. 7. 0 / 53. 7. 0 libavdevice 53. 3. 0 / 53. 3. 0 libavfilter 2. 31. 1 / 2. 31. 1 libswscale 2. 0. 0 / 2. 0. 0 [avi @ 0x239c350] max_analyze_duration 5000000 reached at 5000000 Input #0, avi, from '/storage/test/mencoder/mjpg.avi': Duration: 00:06:07.93, start: 0.000000, bitrate: 227 kb/s Stream #0.0: Video: mjpeg, 640x480, 30 tbr, 30 tbn, 30 tbc Stream #0.1: Audio: pcm_s16le, 44100 Hz, 1 channels, s16, 705 kb/s [buffer @ 0x239d4b0] Invalid pixel format string '-1' Error opening filters! }}} -- Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/401> FFmpeg <http://ffmpeg.org> FFmpeg issue tracker

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#387(avcodec:new): ffmpeg '-profile baseline' no longer works with libx264
by FFmpeg 01 Apr '12

01 Apr '12

#387: ffmpeg '-profile baseline' no longer works with libx264 ------------------------+------------------------- Reporter: rectalogic | Type: defect Status: new | Priority: normal Component: avcodec | Version: git-master Keywords: | Blocked By: Blocking: | Reproduced: 0 Analyzed: 0 | ------------------------+------------------------- Recent ffmpeg seems to be parsing the libavcodec/libx264.c "-profile" codec option as the "-profile" option defined in libavcodec/options.c So "-profile baseline" is eval'ed and fails to parse. {{{ $ ./ffmpeg -i /tmp/in.avi -vcodec libx264 -profile baseline -y /tmp/out.mp4 ffmpeg version N-31788-g0d4ea7b, Copyright (c) 2000-2011 the FFmpeg developers built on Aug 10 2011 01:45:04 with gcc 4.4.3 configuration: --extra-cflags=-I/opt/motionbox/foundation/6.2.2-2 -gee5a36a-dirty/include --extra- ldflags=-L/opt/motionbox/foundation/6.2.2-2-gee5a36a-dirty/lib --enable- libx264 --enable-gpl 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 libpostproc 51. 2. 0 / 51. 2. 0 Input #0, avi, from '/tmp/in.avi': Duration: 00:00:29.98, start: 0.000000, bitrate: 40887 kb/s Stream #0.0: Video: fraps, yuvj420p, 640x512, 60 fps, 60 tbr, 60 tbn, 60 tbc Stream #0.1: Audio: pcm_s16le, 44100 Hz, 2 channels, s16, 1411 kb/s [buffer @ 0x2bd0680] w:640 h:512 pixfmt:yuvj420p tb:1/1000000 sar:0/1 sws_param: [libx264 @ 0x2bcee80] Default settings detected, using medium profile [libx264 @ 0x2bcee80] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2 [libx264 @ 0x2bcee80] profile Constrained Baseline, level 3.1 [libx264 @ 0x2bcee80] 264 - core 116 0b9c261 - H.264/MPEG-4 AVC codec - Copyleft 2003-2011 - http://www.videolan.org/x264.html - options: cabac=0 ref=3 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00 [NULL @ 0x2bd5e60] [Eval @ 0x7fffa8a577d0] Undefined constant or missing '(' in 'baseline' [NULL @ 0x2bd5e60] Unable to parse option value "baseline" [NULL @ 0x2bd5e60] Error setting option profile to value baseline. Output #0, mp4, to '/tmp/out.mp4': Stream #0.0: Video: libx264, yuvj420p, 640x512, q=2-31, 200 kb/s, 90k tbn, 60 tbc Stream #0.1: Audio: aac, 44100 Hz, 2 channels, s16, 64 kb/s Stream mapping: Stream #0.0 -> #0.0 Stream #0.1 -> #0.1 Error while opening encoder for output stream #0.1 - maybe incorrect parameters such as bit_rate, rate, width or height }}} -- Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/387> FFmpeg <http://ffmpeg.org> FFmpeg issue tracker

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#342(undetermined:new): Crash when retrying with TCP
by FFmpeg 01 Apr '12

01 Apr '12

#342: Crash when retrying with TCP -------------------------+-------------------------- Reporter: cehoyos | Owner: Type: defect | Status: new Priority: normal | Component: undetermined Version: git-master | Keywords: Blocked By: | Blocking: Reproduced: 0 | Analyzed: 0 -------------------------+-------------------------- {{{ ffmpeg version N-31404-ga8c2ff2, Copyright (c) 2000-2011 the FFmpeg developers built on Jul 11 2011 16:02:09 with gcc 4.5.3 configuration: --cc=/usr/local/gcc-4.5.3/bin/gcc --enable-gpl libavutil 51. 11. 0 / 51. 11. 0 libavcodec 53. 7. 0 / 53. 7. 0 libavformat 53. 5. 0 / 53. 5. 0 libavdevice 53. 2. 0 / 53. 2. 0 libavfilter 2. 24. 4 / 2. 24. 4 libswscale 2. 0. 0 / 2. 0. 0 libpostproc 51. 2. 0 / 51. 2. 0 [New Thread 0x7ffff5185910 (LWP 7077)] [New Thread 0x7ffff445f910 (LWP 7078)] [New Thread 0x7ffff3739910 (LWP 7079)] [New Thread 0x7ffff2a13910 (LWP 7080)] [rtsp @ 0x12cf420] UDP timeout, retrying with TCP Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 0x7ffff445f910 (LWP 7078)] 0x00000000004f2ffe in circular_buffer_task (_URLContext=0x12d1180) at libavformat/udp.c:333 333 FD_SET(s->udp_fd, &rfds); (gdb) bt #0 0x00000000004f2ffe in circular_buffer_task (_URLContext=0x12d1180) at libavformat/udp.c:333 #1 0x00007ffff721565d in start_thread () from /lib64/libpthread.so.0 #2 0x00007ffff690aecd in clone () from /lib64/libc.so.6 #3 0x0000000000000000 in ?? () (gdb) disass $pc-32 $pc+32 Dump of assembler code from 0x4f2fde to 0x4f301e: 0x00000000004f2fde <circular_buffer_task+46>: add %al,-0x167af040(%rbp) 0x00000000004f2fe4 <circular_buffer_task+52>: add %al,(%rax) 0x00000000004f2fe6 <circular_buffer_task+54>: add %cl,-0x17(%rcx,%rcx,4) 0x00000000004f2fea <circular_buffer_task+58>: mov %rbp,%rdi 0x00000000004f2fed <circular_buffer_task+61>: cld 0x00000000004f2fee <circular_buffer_task+62>: rep stos %rax,%es:(%rdi) 0x00000000004f2ff1 <circular_buffer_task+65>: movslq (%rbx),%rax 0x00000000004f2ff4 <circular_buffer_task+68>: mov %rax,%rdx 0x00000000004f2ff7 <circular_buffer_task+71>: and $0x3f,%eax 0x00000000004f2ffa <circular_buffer_task+74>: shr $0x6,%rdx 0x00000000004f2ffe <circular_buffer_task+78>: bts %rax,(%rsp,%rdx,8) 0x00000000004f3003 <circular_buffer_task+83>: mov (%rbx),%edi 0x00000000004f3005 <circular_buffer_task+85>: xor %ecx,%ecx 0x00000000004f3007 <circular_buffer_task+87>: xor %edx,%edx 0x00000000004f3009 <circular_buffer_task+89>: mov %r12,%r8 0x00000000004f300c <circular_buffer_task+92>: mov %rsp,%rsi 0x00000000004f300f <circular_buffer_task+95>: movq $0x1,0x80(%rsp) 0x00000000004f301b <circular_buffer_task+107>: movq $0x0,0x88(%rsp) End of assembler dump. (gdb) info register rax 0x1 1 rbx 0x12d6140 19751232 rcx 0x0 0 rdx 0x84d108 8704264 rsi 0x7ffff445ef90 140737291612048 rdi 0x7ffff445f0c0 140737291612352 rbp 0x7ffff445f040 0x7ffff445f040 rsp 0x7ffff445f040 0x7ffff445f040 r8 0x7ffff445f010 140737291612176 r9 0x0 0 r10 0x0 0 r11 0x206 518 r12 0x7ffff445f0c0 140737291612352 r13 0x10 16 r14 0x12d1180 19730816 r15 0x1c 28 rip 0x4f2ffe 0x4f2ffe <circular_buffer_task+78> eflags 0x10202 [ IF RF ] cs 0x33 51 ss 0x2b 43 ds 0x0 0 es 0x0 0 fs 0x0 0 gs 0x0 0 fctrl 0x37f 895 fstat 0x0 0 ftag 0xffff 65535 fiseg 0x0 0 fioff 0x0 0 foseg 0x0 0 fooff 0x0 0 fop 0x0 0 mxcsr 0x1fa0 [ PE IM DM ZM OM UM PM ] }}} -- Ticket URL: <https://avcodec.org/trac/ffmpeg/ticket/342> FFmpeg <http://ffmpeg.org> FFmpeg issue tracker

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#1156(undetermined:new): dirac: hang with -vcodec dirac (or libschroedinger)
by FFmpeg 01 Apr '12

01 Apr '12

#1156: dirac: hang with -vcodec dirac (or libschroedinger) -------------------------------------+------------------------------------- Reporter: ami_stuff | Type: defect Status: new | Priority: normal Component: | Version: undetermined | unspecified Keywords: | Blocked By: Blocking: | Reproduced by developer: 0 Analyzed by developer: 0 | -------------------------------------+------------------------------------- http://ffmpeg.org/trac/ffmpeg/attachment/ticket/1059/599.png it happens with any file as an input {{{ C:\>ffmpeg -vcodec dirac -i 599.png ffmpeg version N-39367-g99bb88c Copyright (c) 2000-2012 the FFmpeg developers built on Mar 29 2012 02:20:20 with gcc 4.5.0 20100414 (Fedora MinGW 4.5.0-1.fc 14) configuration: --prefix=/var/www/users/research/ffmpeg/snapshots/build --arch= x86 --target-os=mingw32 --cross-prefix=i686-pc-mingw32- --cc='ccache i686 -pc-min gw32-gcc' --enable-w32threads --enable-memalign-hack --enable-runtime- cpudetect --enable-cross-compile --enable-static --disable-shared --extra- libs='-lws2_32 - lwinmm' --extra-cflags='--static -I/var/www/users/research/ffmpeg/snapshots/buil d/include' --extra-ldflags='-static -L/var/www/users/research/ffmpeg/snapshots/b uild/lib' --enable-bzlib --enable-zlib --enable-gpl --enable-version3 --enable-n onfree --enable-libx264 --enable-libspeex --enable-libtheora --enable- libvorbis --enable-libfaac --enable-libxvid --enable-libopencore-amrnb --enable- libopencor e-amrwb --enable-libmp3lame --enable-libvpx --disable-decoder=libvpx libavutil 51. 44.100 / 51. 44.100 libavcodec 54. 12.100 / 54. 12.100 libavformat 54. 3.100 / 54. 3.100 libavdevice 53. 4.100 / 53. 4.100 libavfilter 2. 66.101 / 2. 66.101 libswscale 2. 1.100 / 2. 1.100 libswresample 0. 10.100 / 0. 10.100 libpostproc 52. 0.100 / 52. 0.100 }}} -- Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1156> FFmpeg <http://ffmpeg.org> FFmpeg issue tracker

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