问题描述:

I am using followng command to convert video to webm format

ffmpeg -i video/ds2.mp4 -acodec libvorbis -ac 2 -ab 96k -ar 44100 -b:a 345k -s 640x360 video/ds2.webm

I am receiving following errors:

1) incompatible sample format 's16' for codec 'libvorbis'

2) strptime() unavailable on this system, cannot convert the data string

Do you any idea why I cannot convert, tested conversion to FLV and it's working very well

Console output

C:\inetpub\wwwroot>ffmpeg -i video/testavi.avi video/ds2.webm

ffmpeg version N-35709-g7d531e8, Copyright (c) 2000-2011 the FFmpeg developers

built on Dec 12 2011 13:56:52 with gcc 4.6.2

configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-ru

ntime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libope

ncore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --en

able-libmp3lame --enable-libopenjpeg --enable-librtmp --enable-libschroedinger -

-enable-libspeex --enable-libtheora --enable-libvo-aacenc --enable-libvo-amrwben

c --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-

libxvid --enable-zlib

libavutil 51. 32. 0 / 51. 32. 0

libavcodec 53. 43. 0 / 53. 43. 0

libavformat 53. 24. 0 / 53. 24. 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

Input #0, avi, from 'video/testavi.avi':

Metadata:

encoder : Lavf51.12.1

Duration: 00:00:13.03, start: 0.000000, bitrate: 36427 kb/s

Stream #0:0: Video: msmpeg4 (MP43 / 0x3334504D), yuv420p, 1920x1080, 30 tbr,

30 tbn, 30 tbc

Stream #0:1: Audio: mp3 (U[0][0][0] / 0x0055), 44100 Hz, stereo, s16, 192 kb

/s

File 'video/ds2.webm' already exists. Overwrite ? [y/N] y

w:1920 h:1080 pixfmt:yuv420p tb:1/1000000 sar:0/1 sws_param:

[libvpx @ 0000000001CA9BB0] v0.9.7-p1

Output #0, webm, to 'video/ds2.webm':

Metadata:

encoder : Lavf53.24.0

Stream #0:0: Video: vp8, yuv420p, 1920x1080, q=-1--1, 200 kb/s, 1k tbn, 30 t

bc

Stream #0:1: Audio: vorbis, 44100 Hz, stereo, s16, 128 kb/s

Stream mapping:

Stream #0:0 -> #0:0 (msmpeg4 -> libvpx)

Stream #0:1 -> #0:1 (mp3 -> libvorbis)

Press [q] to stop, [?] for help


Problem signature:

Problem Event Name: APPCRASH

Application Name: ffmpeg.exe

Application Version: 0.0.0.0

Application Timestamp: 4ee64f02

Fault Module Name: ffmpeg.exe

Fault Module Version: 0.0.0.0

Fault Module Timestamp: 4ee64f02

Exception Code: c0000005

Exception Offset: 000000000091e090

OS Version: 6.1.7601.2.1.0.272.7

Locale ID: 1033

Additional Information 1: ab8f

Additional Information 2: ab8f35a907f8f11a8d2e787a8e40efbd

Additional Information 3: f4d5

Additional Information 4: f4d524f8bf76a4b71cc6a7afa6412ca9

Read our privacy statement online:

http://go.microsoft.com/fwlink/?linkid=104288&clcid=0x0409

If the online privacy statement is not available, please read our privacy statement offline:

C:\Windows\system32\en-US\erofflps.txt

And Console Uncut Output

C:\inetpub\wwwroot>ffmpeg.exe -i "video/testavi.avi" -acodec libvorbis -b:a 96k

-ac 2 -vcodec libvpx -b:v 400k -f webm -s 384x216 "video/testavi.webm"

ffmpeg version N-35709-g7d531e8, Copyright (c) 2000-2011 the FFmpeg developers

built on Dec 12 2011 13:56:52 with gcc 4.6.2

configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-ru

ntime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libope

ncore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --en

able-libmp3lame --enable-libopenjpeg --enable-librtmp --enable-libschroedinger -

-enable-libspeex --enable-libtheora --enable-libvo-aacenc --enable-libvo-amrwben

c --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-

libxvid --enable-zlib

libavutil 51. 32. 0 / 51. 32. 0

libavcodec 53. 43. 0 / 53. 43. 0

libavformat 53. 24. 0 / 53. 24. 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

Input #0, avi, from 'video/testavi.avi':

Metadata:

encoder : Lavf51.12.1

Duration: 00:00:13.03, start: 0.000000, bitrate: 36427 kb/s

Stream #0:0: Video: msmpeg4 (MP43 / 0x3334504D), yuv420p, 1920x1080, 30 tbr,

30 tbn, 30 tbc

Stream #0:1: Audio: mp3 (U[0][0][0] / 0x0055), 44100 Hz, stereo, s16, 192 kb

/s

[buffer @ 0000000001D7FF60] w:1920 h:1080 pixfmt:yuv420p tb:1/1000000 sar:0/1 sw

s_param:

[scale @ 0000000001D7E9E0] w:1920 h:1080 fmt:yuv420p -> w:384 h:216 fmt:yuv420p

flags:0x4

[libvpx @ 0000000001BF7C10] v0.9.7-p1

Output #0, webm, to 'video/testavi.webm':

Metadata:

encoder : Lavf53.24.0

Stream #0:0: Video: vp8, yuv420p, 384x216, q=-1--1, 400 kb/s, 1k tbn, 30 tbc

Stream #0:1: Audio: vorbis, 44100 Hz, 2 channels, s16, 96 kb/s

Stream mapping:

Stream #0:0 -> #0:0 (msmpeg4 -> libvpx)

Stream #0:1 -> #0:1 (mp3 -> libvorbis)

Press [q] to stop, [?] for help

网友答案:

The command you posted worked. The two messages you posted are warnings, not fatal errors.

By the way, I use this command to create WebM videos:

ffmpeg.exe -i "blank.mp4" -acodec libvorbis -b:a 96k -ac 2 -vcodec libvpx -b:v 400k -f webm -s 384x216 "blank.webm"
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