[FFmpeg-user] 回复： 回复： questions about audio filter "atempo"
Pavel Koshevoy
pkoshevoy at gmail.com
Thu Jul 19 09:47:21 CEST 2012
On 7/18/12 9:25 PM, 韩瑞松 wrote:
> Hi,Pavel
> I tried your method
> gdb /usr/local/bin/ffmpeg
>
>
> run -y -i youku.mp4 -analyzeduration 2G -vcodec libx264 -b 512k -r 25 -s 576x312 -aspect 576:312 -psnr -acodec libfaac -ab 64k -ar 44100 -ac 2 -vf setpts=0.5*PTS -af atempo=2 -f flv -map_chapters -1 -g 50 youku.mp4.flv
>
>
> it's output:
>
>
> Starting program: /usr/local/bin/ffmpeg -y -i youku.mp4 -analyzeduration 2G -vcodec libx264 -b 512k -r 25 -s 576x312 -aspect 576:312 -psnr -acodec libfaac -ab 64k -ar 44100 -ac 2 -vf setpts=0.5*PTS -af atempo=2 -f flv -map_chapters -1 -g 50 youku.mp4.flv
> [Thread debugging using libthread_db enabled]
> ffmpeg version git-2012-07-19-6b7849e Copyright (c) 2000-2012 the FFmpeg developers
> built on Jul 19 2012 11:15:05 with gcc 4.4.3
> configuration: --enable-gpl --enable-pthreads --enable-version3 --enable-nonfree --enable-libx264 --enable-libfaac --enable-libmp3lame --enable-libopencore-amrwb --enable-libopencore-amrnb --enable-libxvid --enable-libvpx --enable-libtheora --enable-libvorbis --enable-runtime-cpudetect --enable-debug=3 --enable-ffplay --enable-shared
> libavutil 51. 65.100 / 51. 65.100
> libavcodec 54. 41.100 / 54. 41.100
> libavformat 54. 17.100 / 54. 17.100
> libavdevice 54. 1.100 / 54. 1.100
> libavfilter 3. 2.100 / 3. 2.100
> libswscale 2. 1.100 / 2. 1.100
> libswresample 0. 15.100 / 0. 15.100
> libpostproc 52. 0.100 / 52. 0.100
> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'youku.mp4':
> Metadata:
> major_brand : isom
> minor_version : 1
> compatible_brands: isomavc1
> creation_time : 1941-02-22 02:53:21
> Duration: 00:06:01.48, start: 0.000000, bitrate: 592 kb/s
> Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 576x312 [SAR 577:576 DAR 577:312], 557 kb/s, 25 fps, 25 tbr, 25k tbn, 50 tbc
> Metadata:
> creation_time : 1941-02-22 02:53:21
> handler_name : GPAC ISO Video Handler
> Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, s16, 32 kb/s
> Metadata:
> creation_time : 1941-02-22 02:53:27
> handler_name : GPAC ISO Audio Handler
> Please use -b:a or -b:v, -b is ambiguous
> [libx264 @ 0x809aa00] --psnr used with psy on: results will be invalid!
> [libx264 @ 0x809aa00] --tune psnr should be used if attempting to benchmark psnr!
> [libx264 @ 0x809aa00] using SAR=1/1
> [libx264 @ 0x809aa00] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle Cache64
> [New Thread 0xb7dbfb70 (LWP 6218)]
> [New Thread 0xb75beb70 (LWP 6219)]
> [New Thread 0xb6dbdb70 (LWP 6220)]
> [New Thread 0xb600ab70 (LWP 6221)]
> [libx264 @ 0x809aa00] profile High, level 2.1
> [libx264 @ 0x809aa00] 264 - core 125 - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=3 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=50 keyint_min=5 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=512 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
> [New Thread 0xb4d31b70 (LWP 6222)]
> [New Thread 0xb4530b70 (LWP 6223)]
> [New Thread 0xb3d2fb70 (LWP 6224)]
> Output #0, flv, to 'youku.mp4.flv':
> Metadata:
> major_brand : isom
> minor_version : 1
> compatible_brands: isomavc1
> encoder : Lavf54.17.100
> Stream #0:0(und): Video: h264 ([7][0][0][0] / 0x0007), yuv420p, 576x312 [SAR 1:1 DAR 24:13], q=-1--1, 512 kb/s, 1k tbn, 25 tbc
> Metadata:
> creation_time : 1941-02-22 02:53:21
> handler_name : GPAC ISO Video Handler
> Stream #0:1(und): Audio: aac ([10][0][0][0] / 0x000A), 44100 Hz, stereo, s16, 64 kb/s
> Metadata:
> creation_time : 1941-02-22 02:53:27
> handler_name : GPAC ISO Audio Handler
> Stream mapping:
> Stream #0:0 -> #0:0 (h264 -> libx264)
> Stream #0:1 -> #0:1 (aac -> libfaac)
> Press [q] to stop, [?] for help
>
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x00a186e1 in ?? () from /usr/local/lib/libavcodec.so.54
>
>
>
> What is wrong?
>
>
>
>
> ------------------ 原始邮件 ------------------
> 发件人: "Pavel Koshevoy"<pkoshevoy at gmail.com>;
> 发送时间: 2012年7月19日(星期四) 凌晨1:20
> 收件人: "ffmpeg-user"<ffmpeg-user at ffmpeg.org>;
>
> 主题: Re: [FFmpeg-user]回复： questions about audio filter "atempo"
>
>
>
> On 7/18/2012 12:11 AM, 韩瑞松 wrote:
>> Thank you ,Pavel :
>> I tried the video filter "setpts" like this:
>> ffmpeg -y -i youku.mp4 -analyzeduration 2G -vcodec libx264 -b 512k -r 25 -s 576x312 -aspect 576:312 -psnr -acodec libfaac -ab 64k -ar 44100 -ac 2 -vf setpts=0.5*PTS -af atempo=2 -f flv -map_chapters -1 -g 50 youku.mp4.flv
>>
>>
>> It's output:
>>
>>
>> ffmpeg version git-2012-07-18-56ae592 Copyright (c) 2000-2012 the FFmpeg developers
>> built on Jul 18 2012 11:12:33 with gcc 4.4.3
>> configuration: --enable-pthreads --enable-gpl --enable-version3 --enable-nonfree --enable-libx264 --enable-libmp3lame --enable-libfaac --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvorbis --enable-libtheora --enable-shared --enable-ffplay --enable-libxvid --enable-libvpx
>> libavutil 51. 65.100 / 51. 65.100
>> libavcodec 54. 41.100 / 54. 41.100
>> libavformat 54. 17.100 / 54. 17.100
>> libavdevice 54. 1.100 / 54. 1.100
>> libavfilter 3. 2.100 / 3. 2.100
>> libswscale 2. 1.100 / 2. 1.100
>> libswresample 0. 15.100 / 0. 15.100
>> libpostproc 52. 0.100 / 52. 0.100
>> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'youku.mp4':
>> Metadata:
>> major_brand : isom
>> minor_version : 1
>> compatible_brands: isomavc1
>> creation_time : 1941-02-22 02:53:21
>> Duration: 00:06:01.48, start: 0.000000, bitrate: 592 kb/s
>> Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 576x312 [SAR 577:576 DAR 577:312], 557 kb/s, 25 fps, 25 tbr, 25k tbn, 50 tbc
>> Metadata:
>> creation_time : 1941-02-22 02:53:21
>> handler_name : GPAC ISO Video Handler
>> Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, s16, 32 kb/s
>> Metadata:
>> creation_time : 1941-02-22 02:53:27
>> handler_name : GPAC ISO Audio Handler
>> Please use -b:a or -b:v, -b is ambiguous
>> [libx264 @ 0x9867a00] --psnr used with psy on: results will be invalid!
>> [libx264 @ 0x9867a00] --tune psnr should be used if attempting to benchmark psnr!
>> [libx264 @ 0x9867a00] using SAR=1/1
>> [libx264 @ 0x9867a00] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle Cache64
>> [libx264 @ 0x9867a00] profile High, level 2.1
>> [libx264 @ 0x9867a00] 264 - core 125 r2 5f615f7 - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=3 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=50 keyint_min=5 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=512 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
>> Output #0, flv, to 'youku.mp4.flv':
>> Metadata:
>> major_brand : isom
>> minor_version : 1
>> compatible_brands: isomavc1
>> encoder : Lavf54.17.100
>> Stream #0:0(und): Video: h264 ([7][0][0][0] / 0x0007), yuv420p, 576x312 [SAR 1:1 DAR 24:13], q=-1--1, 512 kb/s, 1k tbn, 25 tbc
>> Metadata:
>> creation_time : 1941-02-22 02:53:21
>> handler_name : GPAC ISO Video Handler
>> Stream #0:1(und): Audio: aac ([10][0][0][0] / 0x000A), 44100 Hz, stereo, s16, 64 kb/s
>> Metadata:
>> creation_time : 1941-02-22 02:53:27
>> handler_name : GPAC ISO Audio Handler
>> Stream mapping:
>> Stream #0:0 -> #0:0 (h264 -> libx264)
>> Stream #0:1 -> #0:1 (aac -> libfaac)
>> Press [q] to stop, [?] for help
>> Segmentation fault
When you get to this stage -- type in "where" or "bt" in gdb, press
enter, then cut and paste the results in the e-mail and send them here.
Pavel.
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