On 24.07.2011 21:07, André Weidemann wrote:

Here are two simple lines to convert a jpg image to mpeg2:

convert $Pict -background '#000000' -resize 1920x1080 -gravity center -extent 1920x1080 /tmp/test.jpg ffmpeg -i /tmp/temp.jpg -an -vcodec mpeg2video -b 2500 -s 1920x1080 -qscale 2 -f mpeg2video $Mpeg

Note: Depending on your distro, ffmpeg may not support mpeg2 video encoding.

For mpeg4 the ffmpeg line looks like this: ffmpeg -i /tmp/temp.jpg -an -vcodec mpeg4 -b 2500 -s 1920x1080 -qscale 2 -threads 4 -f mp4 $Mpeg

For libx264 it looks like this: ffmpeg -i /tmp/temp.jpg -an -vcodec libx264 -vpre lossless_ultrafast -s 1920x1080 -qscale 2 -threads 4 -f mp4 $Mpeg

Note that "-f mp4" means the output is not raw mpeg-4/H.264 but in the mp4 file format.

For raw video (like mpeg2video in your first example), for MPEG-4 one can use "-f m4v" and for H.264 "-f h264".

The -vpre parameter requires a preset. They can usually be found under /usr/share/ffmpeg/libx264-*.ffpreset.

If you want a 10 second video at 25 fps, you can do it like this:

ffmpeg -loop_input -t 10 -r 25 -i /tmp/temp.jpg -an -vcodec mpeg4 -b 2500 -s 1920x1080 -qscale 2 -threads 4 -f mp4 $Mpeg

You may want to adjust the number of threads according to the number of cores in your machine.

André

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Hi Klaus,

On 14.08.2011 12:47, Klaus Schmidinger wrote:

On 24.07.2011 20:07, André Weidemann wrote:

...

Hi Klaus,

On 23.07.2011 16:57, Klaus Schmidinger wrote:

...

The VDR plugin 'pictures' (part of the original VDR archive) uses a Perl script named 'pic2mpg', which converts a JPEG image into an MPEG frame that can be displayed directly by VDR's primary output device. This is done in essence by the command sequence

jpegtopnm $Pict | pnmscale --xscale=$ScaleW --yscale=$ScaleH | pnmpad --black --width $SW --height $SH | ppmtoy4m -F $framerate -I p -S 420mpeg2 | mpeg2enc -f 3 -b 12500 -a $aspect -q 1 -n $system2 -o $Mpeg

(see the actual script for the complete working environment).

While this works fine for SD video, I can't seen to figure out how to make this work for an HD video output device. The video frame should be a 1080i frame in my case (my tv can't handle 1080p), but could optionally also be 720p or 1080p, depending on the actual tv's capabilities.

Can anybody give me a pointer how this script could generate HD video frames?

I have not used mpeg2enc at all. I usually use convert from ImageMagick and ffmpeg to convert things. You might want to give those two a try.

Here are two simple lines to convert a jpg image to mpeg2:

convert $Pict -background '#000000' -resize 1920x1080 -gravity center -extent 1920x1080 /tmp/test.jpg ffmpeg -i /tmp/temp.jpg -an -vcodec mpeg2video -b 2500 -s 1920x1080 -qscale 2 -f mpeg2video $Mpeg

Note: Depending on your distro, ffmpeg may not support mpeg2 video encoding.

For mpeg4 the ffmpeg line looks like this: ffmpeg -i /tmp/temp.jpg -an -vcodec mpeg4 -b 2500 -s 1920x1080 -qscale 2 -threads 4 -f mp4 -y $Mpeg

For libx264 it looks like this: ffmpeg -i /tmp/temp.jpg -an -vcodec libx264 -vpre lossless_ultrafast -s 1920x1080 -qscale 2 -threads 4 -f mp4 $Mpeg

The -vpre parameter requires a preset. They can usually be found under /usr/share/ffmpeg/libx264-*.ffpreset.

Thanks, that was a great help!

I found this command to work pretty good:

ffmpeg -i /tmp/test.jpg -an -vcodec libx264 -vpre baseline -s 1920x1080 -qscale 2 -f mpegts -y $Mpeg

It generates a decently sized TS file (some 100-200 KB) that can be displayed with the dvbhddevice plugin on a TT-S2 6400.

Now I wanted to pipe the output of the convert command into ffmpeg (to avoid the temporary file), but that doesn't seem to work:

convert $Pict -background '#000000' -resize 1920x1080 -gravity center -extent 1920x1080 - | ffmpeg -i pipe:0 -an -vcodec libx264 -vpre baseline -s 1920x1080 -qscale 2 -f mpegts -y $Mpeg

gives me

ffmpeg version 0.8, Copyright (c) 2000-2011 the FFmpeg developers built on Jun 23 2011 09:35:04 with gcc 4.5.1 20101208 [gcc-4_5-branch revision 167585] configuration: --shlibdir=/usr/lib --prefix=/usr --mandir=/usr/share/man --libdir=/usr/lib --enable-shared --disable-static --enable-libmp3lame --enable-libvorbis --enable-libtheora --enable-libspeex --enable-libxvid --enable-postproc --enable-gpl --enable-x11grab --extra-cflags='-fomit-frame-pointer -fmessage-length=0 -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector -funwind-tables -fasynchronous-unwind-tables -g -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -I/usr/include/gsm' --enable-debug --disable-stripping --enable-libgsm --enable-libschroedinger --enable-libdirac --enable-avfilter --enable-libvpx --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libx264 --enable-libdc1394 --enable-pthreads --enable-librtmp libavutil 51. 9. 1 / 51. 9. 1 libavcodec 53. 7. 0 / 53. 7. 0 libavformat 53. 4. 0 / 53. 4. 0 libavdevice 53. 1. 1 / 53. 1. 1 libavfilter 2. 23. 0 / 2. 23. 0 libswscale 2. 0. 0 / 2. 0. 0 libpostproc 51. 2. 0 / 51. 2. 0 [mp3 @ 0x807bb00] Format mp3 detected only with low score of 1, misdetection possible! [mp3 @ 0x807d900] Header missing Last message repeated 1 times [mp3 @ 0x807bb00] Could not find codec parameters (Audio: mp1, 0 channels, s16) [mp3 @ 0x807bb00] Estimating duration from bitrate, this may be inaccurate pipe:0: could not find codec parameters

Please try the following:

convert $Pict -background '#000000' -resize 1920x1080 -gravity center -extent 1920x1080 jpg:- | ffmpeg -f mjpeg -i pipe:0 -an -vcodec libx264 -vpre baseline -s 1920x1080 -qscale 2 -f mpegts -y $Mpeg

André

Hi Klaus,

On 14.08.2011 14:17, Klaus Schmidinger wrote:

On 14.08.2011 13:43, André Weidemann wrote:

...

Hi Klaus,

On 14.08.2011 12:47, Klaus Schmidinger wrote:

...

On 24.07.2011 20:07, André Weidemann wrote:

...

Hi Klaus,

On 23.07.2011 16:57, Klaus Schmidinger wrote:

...

The VDR plugin 'pictures' (part of the original VDR archive) uses a Perl script named 'pic2mpg', which converts a JPEG image into an MPEG frame that can be displayed directly by VDR's primary output device. This is done in essence by the command sequence

jpegtopnm $Pict | pnmscale --xscale=$ScaleW --yscale=$ScaleH | pnmpad --black --width $SW --height $SH | ppmtoy4m -F $framerate -I p -S 420mpeg2 | mpeg2enc -f 3 -b 12500 -a $aspect -q 1 -n $system2 -o $Mpeg

(see the actual script for the complete working environment).

While this works fine for SD video, I can't seen to figure out how to make this work for an HD video output device. The video frame should be a 1080i frame in my case (my tv can't handle 1080p), but could optionally also be 720p or 1080p, depending on the actual tv's capabilities.

Can anybody give me a pointer how this script could generate HD video frames?

I have not used mpeg2enc at all. I usually use convert from ImageMagick and ffmpeg to convert things. You might want to give those two a try.

Here are two simple lines to convert a jpg image to mpeg2:

convert $Pict -background '#000000' -resize 1920x1080 -gravity center -extent 1920x1080 /tmp/test.jpg ffmpeg -i /tmp/temp.jpg -an -vcodec mpeg2video -b 2500 -s 1920x1080 -qscale 2 -f mpeg2video $Mpeg

Note: Depending on your distro, ffmpeg may not support mpeg2 video encoding.

For mpeg4 the ffmpeg line looks like this: ffmpeg -i /tmp/temp.jpg -an -vcodec mpeg4 -b 2500 -s 1920x1080 -qscale 2 -threads 4 -f mp4 -y $Mpeg

For libx264 it looks like this: ffmpeg -i /tmp/temp.jpg -an -vcodec libx264 -vpre lossless_ultrafast -s 1920x1080 -qscale 2 -threads 4 -f mp4 $Mpeg

The -vpre parameter requires a preset. They can usually be found under /usr/share/ffmpeg/libx264-*.ffpreset.

Thanks, that was a great help!

I found this command to work pretty good:

ffmpeg -i /tmp/test.jpg -an -vcodec libx264 -vpre baseline -s 1920x1080 -qscale 2 -f mpegts -y $Mpeg

It generates a decently sized TS file (some 100-200 KB) that can be displayed with the dvbhddevice plugin on a TT-S2 6400.

Now I wanted to pipe the output of the convert command into ffmpeg (to avoid the temporary file), but that doesn't seem to work:

convert $Pict -background '#000000' -resize 1920x1080 -gravity center -extent 1920x1080 - | ffmpeg -i pipe:0 -an -vcodec libx264 -vpre baseline -s 1920x1080 -qscale 2 -f mpegts -y $Mpeg

gives me

ffmpeg version 0.8, Copyright (c) 2000-2011 the FFmpeg developers built on Jun 23 2011 09:35:04 with gcc 4.5.1 20101208 [gcc-4_5-branch revision 167585] configuration: --shlibdir=/usr/lib --prefix=/usr --mandir=/usr/share/man --libdir=/usr/lib --enable-shared --disable-static --enable-libmp3lame --enable-libvorbis --enable-libtheora --enable-libspeex --enable-libxvid --enable-postproc --enable-gpl --enable-x11grab --extra-cflags='-fomit-frame-pointer -fmessage-length=0 -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector -funwind-tables -fasynchronous-unwind-tables -g -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -I/usr/include/gsm' --enable-debug --disable-stripping --enable-libgsm --enable-libschroedinger --enable-libdirac --enable-avfilter --enable-libvpx --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libx264 --enable-libdc1394 --enable-pthreads --enable-librtmp libavutil 51. 9. 1 / 51. 9. 1 libavcodec 53. 7. 0 / 53. 7. 0 libavformat 53. 4. 0 / 53. 4. 0 libavdevice 53. 1. 1 / 53. 1. 1 libavfilter 2. 23. 0 / 2. 23. 0 libswscale 2. 0. 0 / 2. 0. 0 libpostproc 51. 2. 0 / 51. 2. 0 [mp3 @ 0x807bb00] Format mp3 detected only with low score of 1, misdetection possible! [mp3 @ 0x807d900] Header missing Last message repeated 1 times [mp3 @ 0x807bb00] Could not find codec parameters (Audio: mp1, 0 channels, s16) [mp3 @ 0x807bb00] Estimating duration from bitrate, this may be inaccurate pipe:0: could not find codec parameters

Please try the following:

convert $Pict -background '#000000' -resize 1920x1080 -gravity center -extent 1920x1080 jpg:- | ffmpeg -f mjpeg -i pipe:0 -an -vcodec libx264 -vpre baseline -s 1920x1080 -qscale 2 -f mpegts -y $Mpeg

This results in a rather blurry image, and I get the following messages:

x264 -vpre baseline -s 1920x1080 -qscale 2 -f mpegts -y x3.mp4 ffmpeg version 0.8, Copyright (c) 2000-2011 the FFmpeg developers built on Jun 23 2011 09:35:04 with gcc 4.5.1 20101208 [gcc-4_5-branch revision 167585] configuration: --shlibdir=/usr/lib --prefix=/usr --mandir=/usr/share/man --libdir=/usr/lib --enable-shared --disable-static --enable-libmp3lame --enable-libvorbis --enable-libtheora --enable-libspeex --enable-libxvid --enable-postproc --enable-gpl --enable-x11grab --extra-cflags='-fomit-frame-pointer -fmessage-length=0 -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector -funwind-tables -fasynchronous-unwind-tables -g -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -I/usr/include/gsm' --enable-debug --disable-stripping --enable-libgsm --enable-libschroedinger --enable-libdirac --enable-avfilter --enable-libvpx --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libx264 --enable-libdc1394 --enable-pthreads --enable-librtmp libavutil 51. 9. 1 / 51. 9. 1 libavcodec 53. 7. 0 / 53. 7. 0 libavformat 53. 4. 0 / 53. 4. 0 libavdevice 53. 1. 1 / 53. 1. 1 libavfilter 2. 23. 0 / 2. 23. 0 libswscale 2. 0. 0 / 2. 0. 0 libpostproc 51. 2. 0 / 51. 2. 0 [mjpeg @ 0x807bb00] Estimating duration from bitrate, this may be inaccurate Input #0, mjpeg, from 'pipe:0': Duration: N/A, bitrate: N/A Stream #0.0: Video: mjpeg, yuvj422p, 160x120 [PAR 180:180 DAR 4:3], 25 tbr, 1200k tbn, 25 tbc Incompatible pixel format 'yuvj422p' for codec 'libx264', auto-selecting format 'yuv420p' [buffer @ 0x80847e0] w:160 h:120 pixfmt:yuvj422p tb:1/1000000 sar:180/180 sws_param: [scale @ 0x80871e0] w:160 h:120 fmt:yuvj422p -> w:1920 h:1080 fmt:yuv420p flags:0x4 [libx264 @ 0x8087660] Default settings detected, using medium profile [libx264 @ 0x8087660] using SAR=1/1 [libx264 @ 0x8087660] using cpu capabilities: MMX2 Cache64 [libx264 @ 0x8087660] profile High, level 4.0 [mpegts @ 0x80851a0] muxrate VBR, pcr every 2 pkts, sdt every 200, pat/pmt every 40 pkts Output #0, mpegts, to 'x3.mp4': Metadata: encoder : Lavf53.4.0 Stream #0.0: Video: libx264, yuv420p, 1920x1080 [PAR 180:180 DAR 16:9], q=2-31, 200 kb/s, 90k tbn, 25 tbc Stream mapping: Stream #0.0 -> #0.0 frame= 1 fps= 0 q=28.0 Lsize= 45kB time=00:00:00.-4 bitrate=-9287.2kbits/s video:42kB audio:0kB global headers:0kB muxing overhead 8.419332% frame I:1 Avg QP:27.00 size: 42830 [libx264 @ 0x8087660] mb I I16..4: 13.3% 85.7% 1.1% [libx264 @ 0x8087660] 8x8 transform intra:85.7% [libx264 @ 0x8087660] coded y,uvDC,uvAC intra: 62.5% 56.6% 2.5% [libx264 @ 0x8087660] i16 v,h,dc,p: 2% 25% 1% 72% [libx264 @ 0x8087660] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 13% 36% 10% 6% 7% 4% 10% 5% 8% [libx264 @ 0x8087660] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 22% 33% 9% 5% 8% 6% 10% 4% 4% [libx264 @ 0x8087660] i8c dc,h,v,p: 48% 34% 9% 9% [libx264 @ 0x8087660] kb/s:8566.00

After reading the ffmpeg man page again I came up with the following line: convert $Pict -background '#000000' -resize 1920x1080 -gravity center -extent 1920x1080 ppm:- | ffmpeg -f image2pipe -vcodec ppm -i pipe:0 -an -vcodec libx264 -vpre baseline -s 1920x1080 -qscale 2 -f mpegts -y $Mpeg

I used ppm, because this was the only format ffmpeg and convert could agree upon after several attempts.

You can take a look at:

identify -list format and ffmpeg -codecs

for a list of all supported formats from ffmpeg and convert.

André