[FFmpeg-user] Webm Wrong Displaysize

[Lou]

On Mon, 13 Jun 2011 18:47:14 +0200
Mathieu Goutfreind <mathieu_g1 at gmx.fr> wrote:

> Hello,
> 
> I've got a small problem with webm.
> Using ffmpeg the displaysize is incorrect.

What size are you expecting?

> Have you got a clue ?

Before trying a bunch of suggested commands you should see if recent
FFmpeg and libvpx work as expected. FFmpeg SVN-r25767 is nearly 7
months old and I'm not sure how old your libvpx is. Development is
active in both projects and you may be experiencing a bug that has
already been fixed.

> Regards
> 
> Command used : 
> #ffmpeg -i M2U00008.MPG -threads 4 -f webm -vcodec libvpx -deinterlace
> -sameq -acodec libvorbis -alang fr -aq 90 -ac 2 -ab 160k -y
> M2U00008.webm
> 
> FFmpeg version SVN-r25767, Copyright (c) 2000-2010 the FFmpeg
> developers built on Jun 11 2011 20:21:36 with gcc 4.4.5
>   configuration: --prefix=/usr --libdir=/usr/lib64
> --shlibdir=/usr/lib64 --mandir=/usr/share/man --enable-shared
> --cc=x86_64-pc-linux-gnu-gcc --disable-static --enable-gpl
> --enable-version3 --enable-postproc --enable-avfilter
> --disable-stripping --disable-debug --disable-doc --disable-network
> --disable-vaapi --disable-vdpau --enable-libmp3lame --enable-libtheora
> --enable-libvorbis --enable-libx264 --enable-libfaac --enable-nonfree
> --disable-indev=v4l --disable-indev=v4l2 --disable-indev=oss
> --disable-indev=jack --enable-x11grab --disable-outdev=oss
> --enable-pthreads --enable-libgsm --enable-libdirac --enable-libspeex
> --enable-libvpx --enable-libopenjpeg --disable-altivec
> --enable-hardcoded-tables libavutil     50.33. 0 / 50.33. 0
> libavcore      0.13. 0 /  0.13. 0 libavcodec    52.96. 0 / 52.96. 0
> libavformat   52.84. 0 / 52.84. 0 libavdevice   52. 2. 2 / 52. 2. 2
> libavfilter    1.62. 0 /  1.62. 0 libswscale     0.12. 0 /  0.12. 0
> libpostproc   51. 2. 0 / 51. 2. 0 Input #0, mpeg, from 'M2U00008.MPG':
> Duration: 00:03:58.55, start: 0.072389, bitrate: 9624 kb/s Stream
> #0.0[0x1e0]: Video: mpeg2video, yuv420p, 720x576 [PAR 64:45 DAR 16:9],
> 9100 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc Stream #0.1[0x80]: Audio:
> ac3, 48000 Hz, 5.1, s16, 448 kb/s [buffer @ 0x28c8280] w:720 h:576
> pixfmt:yuv420p [scale @ 0x28c0f30] w:720 h:576 fmt:yuv420p -> w:768
> h:576 fmt:yuv420p flags:0xa0000004 [libvpx @ 0x23a4090] v0.9.5 Output
> #0, webm, to 'M2U00008.webm': Metadata: encoder         : Lavf52.84.0
> Stream #0.0: Video: libvpx, yuv420p, 768x576 [PAR 4:3 DAR 16:9],
> q=2-31, 200 kb/s, 1k tbn, 25 tbc Stream #0.1(fr): Audio: libvorbis,
> 48000 Hz, 2 channels, s16, 160 kb/s Stream mapping: Stream #0.0 ->
> #0.0 Stream #0.1 -> #0.1
> 
>  # mkvinfo M2U00008.webm 
> + EBML head
> |+ EBML version: 1
> |+ EBML read version: 1
> |+ EBML maximum ID length: 4
> |+ EBML maximum size length: 8
> |+ Doc type: webm
> |+ Doc type version: 2
> |+ Doc type read version: 2
> + Segment, size 23370077
> |+ Seek head (subentries will be skipped)
> |+ EbmlVoid (size: 162)
> |+ Segment information
> | + Timecode scale: 1000000
> | + Muxing application: Lavf52.84.0
> | + Writing application: Lavf52.84.0
> | + Segment UID: 0xe8 0x37 0x5c 0x8a 0xb7 0xae 0x41 0x57 0x4f 0xc3
> 0x1b 0xe6 0x8f 0xdc 0xf7 0x00 | + Duration: 106.480s (00:01:46.480)
> |+ Segment tracks
> | + A track
> |  + Track number: 1
> |  + Track UID: 1
> |  + Lacing flag: 0
> |  + Language: und
> |  + Codec ID: V_VP8
> |  + Track type: video
> |  + Default duration: 40.000ms (25.000 fps for a video track)
> |  + Video track
> |   + Pixel width: 768
> |   + Pixel height: 576
> |   + Display width: 1024
> |   + Display height: 576
> |   + Display unit: 3
> | + A track
> |  + Track number: 2
> |  + Track UID: 2
> |  + Lacing flag: 0
> |  + Language: fr
> |  + Codec ID: A_VORBIS
> |  + Track type: audio
> |  + Audio track
> |   + Channels: 2
> |   + Sampling frequency: 48000
> |   + Bit depth: 16
> |  + CodecPrivate, length 4022
> |+ Cluster