On Wed, Jun 6, 2012 at 9:12 AM, Carl Eugen Hoyos <ceho...@ag.or.at> wrote:
> Sampath Subasinghe <susiriss@...> writes: > > > I was wondering whether this is what you meant. > > This is broken (because odd width is not supported by > yuv rawvideo): > ffmpeg -i ref.ppm ref.yuv > ffmpeg -s 45x32 -i ref.yuv ref2.ppm > > The following does work and produces the same black edge: > $ ffmpeg -i out.ppm -pix_fmt yuv420p -strict experimental out.ljpg > $ ffmpeg -i out.ljpg ref2.ppm > > Carl Eugen > I am not using the latest build, but for me the round-trip worked without artifacts, see attached images and console output: *ffmpeg -i C:\Users\acohen\Downloads\ref.ppm -pix_fmt yuv420p t.yuv **ffmpeg version N-35295-gb55dd10, Copyright (c) 2000-2011 the FFmpeg developers built on Nov 30 2011 00:58:17 with gcc 4.6.2 configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-runtime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libope ncore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable- libxvid --enable-zlib* * libavutil 51. 29. 1 / 51. 29. 1 libavcodec 53. 39. 1 / 53. 39. 1 libavformat 53. 22. 0 / 53. 22. 0 libavdevice 53. 4. 0 / 53. 4. 0 libavfilter 2. 50. 0 / 2. 50. 0 libswscale 2. 1. 0 / 2. 1. 0 libpostproc 51. 2. 0 / 51. 2. 0 *Input #0, image2, from 'C:\Users\acohen\Downloads\ref.ppm': Duration: 00:00:00.04, start: 0.000000, bitrate: N/A Stream #0:0: Video: ppm, rgb24, 45x32, 25 tbr, 25 tbn, 25 tbc w:45 h:32 pixfmt:rgb24 tb:1/1000000 sar:0/1 sws_param: [buffersink @ 00000000003369B0] auto-inserting filter 'auto-inserted scale 0' between the filter 'src' and the filter 'out' [scale @ 0000000000337C60] w:45 h:32 fmt:rgb24 -> w:45 h:32 fmt:yuv420p flags:0x4 Output #0, rawvideo, to 't.yuv': Metadata: encoder : Lavf53.22.0 Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 45x32, q=2-31, 20 0 kb/s, 90k tbn, 25 tbc Stream mapping: Stream #0:0 -> #0:0 (ppm -> rawvideo) Press [q] to stop, [?] for help frame= 1 fps= 0 q=0.0 Lsize= 2kB time=00:00:00.04 bitrate= 435.2kbits/s video:2kB audio:0kB global headers:0kB muxing overhead 0.000000% *ffmpeg -pix_fmt yuv420p -s 45x32 -i t.yuv t.ppm* [rawvideo @ 000000000038D660] Estimating duration from bitrate, this may be inaccurate Input #0, rawvideo, from 't.yuv': Duration: N/A, start: 0.000000, bitrate: N/A Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 45x32, 25 tbr, 25 tbn, 25 tbc Incompatible pixel format 'yuv420p' for codec 'ppm', auto-selecting format 'rgb24' [buffer @ 000000000038D5E0] w:45 h:32 pixfmt:yuv420p tb:1/1000000 sar:0/1 sws_param: [buffersink @ 000000000038F490] auto-inserting filter 'auto-inserted scale 0' between the filter 'src' and the filter 'out' [scale @ 000000000038F6F0] w:45 h:32 fmt:yuv420p -> w:45 h:32 fmt:rgb24 flags:0x4 Output #0, image2, to 't.ppm': Metadata: encoder : Lavf53.22.0 Stream #0:0: Video: ppm, rgb24, 45x32, q=2-31, 200 kb/s, 90k tbn, 25 tbc Stream mapping: Stream #0:0 -> #0:0 (rawvideo -> ppm) Press [q] to stop, [?] for help frame= 1 fps= 0 q=0.0 Lsize= 0kB time=00:00:00.04 bitrate= 0.0kbits/s video:4kB audio:0kB global headers:0kB muxing overhead -100.000000%
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