> -----Original Message----- > From: ffmpeg-devel [mailto:ffmpeg-devel-boun...@ffmpeg.org] On Behalf Of > sean darcy > Sent: Saturday, October 27, 2018 3:07 AM > To: ffmpeg-devel@ffmpeg.org > Subject: Re: [FFmpeg-devel] [PATCH V2] libavfilter/vaapi: enable vaapi > rotation feature via call Intel iHD driver > > On 10/26/18 11:18 AM, Paul B Mahol wrote: > > On 10/26/18, Zhou, Zachary <zachary.z...@intel.com> wrote: > >> > >> > >>> -----Original Message----- > >>> From: ffmpeg-devel [mailto:ffmpeg-devel-boun...@ffmpeg.org] On > >>> Behalf Of Rostislav Pehlivanov > >>> Sent: Friday, October 26, 2018 9:02 PM > >>> To: FFmpeg development discussions and patches > >>> <ffmpeg-devel@ffmpeg.org> > >>> Subject: Re: [FFmpeg-devel] [PATCH V2] libavfilter/vaapi: enable > >>> vaapi rotation feature via call Intel iHD driver > >>> > >>> On Fri, 26 Oct 2018 at 04:10, Zhou, Zachary <zachary.z...@intel.com> > >>> wrote: > >>> > >>>> > >>>> > >>>>> -----Original Message----- > >>>>> From: ffmpeg-devel [mailto:ffmpeg-devel-boun...@ffmpeg.org] On > >>>>> Behalf Of sean darcy > >>>>> Sent: Thursday, October 25, 2018 11:51 PM > >>>>> To: ffmpeg-devel@ffmpeg.org > >>>>> Subject: Re: [FFmpeg-devel] [PATCH V2] libavfilter/vaapi: enable > >>>>> vaapi rotation feature via call Intel iHD driver > >>>>> > >>>>> On 10/25/18 2:52 AM, Zachary Zhou wrote: > >>>>>> It supports clockwise rotation by 0/90/180/270 degrees defined in > >>>>>> va/va_vpp.h, tested following command line on SKL platform > >>>>>> > >>>>>> dir=0 for 0 degree > >>>>>> dir=1 for 90 degree > >>>>>> dir=2 for 180 degree > >>>>>> dir=3 for 270 degree > >>>>>> > >>>>>> ffmpeg -hwaccel vaapi -vaapi_device /dev/dri/renderD128 > >>>>>> -hwaccel_output_format vaapi -i input.264 -vf > >>>>>> "rotation_vaapi=dir=1" > >>>>>> -c:v h264_vaapi output.h264 > >>>>>> > >>>>>> Signed-off-by: Zachary Zhou <zachary.z...@intel.com> > >>>>>> --- > >>>>>> configure | 3 + > >>>>>> libavfilter/Makefile | 1 + > >>>>>> libavfilter/allfilters.c | 1 + > >>>>>> libavfilter/vaapi_vpp.h | 1 + > >>>>>> libavfilter/vf_rotate_vaapi.c | 252 > >>>> ++++++++++++++++++++++++++++++++++ > >>>>>> 5 files changed, 258 insertions(+) > >>>>>> create mode 100644 libavfilter/vf_rotate_vaapi.c > >>>>>> > >>>>>> diff --git a/configure b/configure index 85d5dd5962..33aced3d78 > >>>>>> 100755 > >>>>>> --- a/configure > >>>>>> +++ b/configure > >>>>>> @@ -6390,6 +6390,9 @@ if enabled vaapi; then > >>>>>> fi > >>>>>> > >>>>>> check_cpp_condition vaapi_1 "va/va.h" "VA_CHECK_VERSION(1, > >>>>>> 0, > >>> 0)" > >>>>>> + if ! check_struct "va/va.h" "struct _VAProcPipelineCaps" > >>>> rotation_flags; > >>>>> then > >>>>>> + disable rotation_vaapi_filter > >>>>>> + fi > >>>>>> fi > >>>>>> > >>>>>> if enabled_all opencl libdrm ; then diff --git > >>>>>> a/libavfilter/Makefile b/libavfilter/Makefile index > >>>>>> 108a2f87d7..534650364a 100644 > >>>>>> --- a/libavfilter/Makefile > >>>>>> +++ b/libavfilter/Makefile > >>>>>> @@ -349,6 +349,7 @@ OBJS-$(CONFIG_SETRANGE_FILTER) += > >>>>> vf_setparams.o > >>>>>> OBJS-$(CONFIG_SETSAR_FILTER) += vf_aspect.o > >>>>>> OBJS-$(CONFIG_SETTB_FILTER) += settb.o > >>>>>> OBJS-$(CONFIG_SHARPNESS_VAAPI_FILTER) += vf_misc_vaapi.o > >>>>> vaapi_vpp.o > >>>>>> +OBJS-$(CONFIG_ROTATION_VAAPI_FILTER) += vf_rotate_vaapi.o > >>>>> vaapi_vpp.o > >>>>>> OBJS-$(CONFIG_SHOWINFO_FILTER) += vf_showinfo.o > >>>>>> OBJS-$(CONFIG_SHOWPALETTE_FILTER) += vf_showpalette.o > >>>>>> OBJS-$(CONFIG_SHUFFLEFRAMES_FILTER) += > >>>>>> vf_shuffleframes.o > >>>>>> diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c > >>>>>> index > >>>>>> 557590850b..4b90a7f440 100644 > >>>>>> --- a/libavfilter/allfilters.c > >>>>>> +++ b/libavfilter/allfilters.c > >>>>>> @@ -333,6 +333,7 @@ extern AVFilter ff_vf_setrange; > >>>>>> extern AVFilter ff_vf_setsar; > >>>>>> extern AVFilter ff_vf_settb; > >>>>>> extern AVFilter ff_vf_sharpness_vaapi; > >>>>>> +extern AVFilter ff_vf_rotation_vaapi; > >>>>>> extern AVFilter ff_vf_showinfo; > >>>>>> extern AVFilter ff_vf_showpalette; > >>>>>> extern AVFilter ff_vf_shuffleframes; diff --git > >>>>>> a/libavfilter/vaapi_vpp.h b/libavfilter/vaapi_vpp.h index > >>>>>> 0bc31018d4..cfe19b689f 100644 > >>>>>> --- a/libavfilter/vaapi_vpp.h > >>>>>> +++ b/libavfilter/vaapi_vpp.h > >>>>>> @@ -44,6 +44,7 @@ typedef struct VAAPIVPPContext { > >>>>>> int output_width; // computed width > >>>>>> int output_height; // computed height > >>>>>> > >>>>>> + int rotation_state; > >>>>>> VABufferID filter_buffers[VAProcFilterCount]; > >>>>>> int nb_filter_buffers; > >>>>>> > >>>>>> diff --git a/libavfilter/vf_rotate_vaapi.c > >>>>>> b/libavfilter/vf_rotate_vaapi.c new file mode 100644 index > >>>>>> 0000000000..34c270e9c7 > >>>>>> --- /dev/null > >>>>>> +++ b/libavfilter/vf_rotate_vaapi.c > >>>>>> @@ -0,0 +1,252 @@ > >>>>>> +/* > >>>>>> + * This file is part of FFmpeg. > >>>>>> + * > >>>>>> + * FFmpeg is free software; you can redistribute it and/or > >>>>>> + * modify it under the terms of the GNU Lesser General Public > >>>>>> + * License as published by the Free Software Foundation; either > >>>>>> + * version 2.1 of the License, or (at your option) any later > >>>>>> version. > >>>>>> + * > >>>>>> + * FFmpeg is distributed in the hope that it will be useful, > >>>>>> + * but WITHOUT ANY WARRANTY; without even the implied warranty > >>>>>> + of > >>>>>> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See > the > >>>>> GNU > >>>>>> + * Lesser General Public License for more details. > >>>>>> + * > >>>>>> + * You should have received a copy of the GNU Lesser General > >>>>>> +Public > >>>>>> + * License along with FFmpeg; if not, write to the Free Software > >>>>>> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA > >>>>>> +02110-1301 USA */ #include <string.h> > >>>>>> + > >>>>>> +#include "libavutil/avassert.h" > >>>>>> +#include "libavutil/mem.h" > >>>>>> +#include "libavutil/opt.h" > >>>>>> +#include "libavutil/pixdesc.h" > >>>>>> + > >>>>>> +#include "avfilter.h" > >>>>>> +#include "formats.h" > >>>>>> +#include "internal.h" > >>>>>> +#include "vaapi_vpp.h" > >>>>>> + > >>>>>> +// Rotation angle values > >>>>>> +enum RotationAngle { > >>>>>> + ROTATION_0 = 0, > >>>>>> + ROTATION_90 = 1, > >>>>>> + ROTATION_180 = 2, > >>>>>> + ROTATION_270 = 3, > >>>>>> + > >>>>>> + ROTATION_MIN = ROTATION_0, > >>>>>> + ROTATION_MAX = ROTATION_270, > >>>>>> + ROTATION_DEFAULT = ROTATION_0, }; > >>>>>> + > >>>>>> +typedef struct RotationVAAPIContext { > >>>>>> + VAAPIVPPContext vpp_ctx; // must be the first field > >>>>>> + > >>>>>> + int rotation; // enable rotation. > >>>>>> +} RotationVAAPIContext; > >>>>>> + > >>>>>> +static int rotation_vaapi_build_filter_params(AVFilterContext > >>>>>> +*avctx) { > >>>>>> + VAAPIVPPContext *vpp_ctx = avctx->priv; > >>>>>> + RotationVAAPIContext *ctx = avctx->priv; > >>>>>> + > >>>>>> + VAStatus vas; > >>>>>> + int support_flag; > >>>>>> + > >>>>>> + VAProcPipelineCaps pipeline_caps; > >>>>>> + > >>>>>> + memset(&pipeline_caps, 0, sizeof(pipeline_caps)); > >>>>>> + vas = vaQueryVideoProcPipelineCaps(vpp_ctx->hwctx->display, > >>>>>> + vpp_ctx->va_context, > >>>>>> + NULL, 0, > >>>>>> + &pipeline_caps); > >>>>>> + if (vas != VA_STATUS_SUCCESS) { > >>>>>> + av_log(avctx, AV_LOG_ERROR, "Failed to query pipeline " > >>>>>> + "caps: %d (%s).\n", vas, vaErrorStr(vas)); > >>>>>> + return AVERROR(EIO); > >>>>>> + } > >>>>>> + > >>>>>> + if (!pipeline_caps.rotation_flags) { > >>>>>> + av_log(avctx, AV_LOG_ERROR, "VAAPI driver doesn't > >>>>>> + support > >>>>> rotation\n"); > >>>>>> + return AVERROR(EINVAL); > >>>>>> + } > >>>>>> + > >>>>>> + switch (ctx->rotation) { > >>>>>> + case ROTATION_0: > >>>>>> + vpp_ctx->rotation_state = VA_ROTATION_NONE; > >>>>>> + break; > >>>>>> + case ROTATION_90: > >>>>>> + vpp_ctx->rotation_state = VA_ROTATION_90; > >>>>>> + break; > >>>>>> + case ROTATION_180: > >>>>>> + vpp_ctx->rotation_state = VA_ROTATION_180; > >>>>>> + break; > >>>>>> + case ROTATION_270: > >>>>>> + vpp_ctx->rotation_state = VA_ROTATION_270; > >>>>>> + break; > >>>>>> + default: > >>>>>> + av_log(avctx, AV_LOG_ERROR, "Failed to set > >>>>>> + rotation_state to > >>>> %d. " > >>>>>> + "Clockwise %d, %d, %d and %d are only supported\n", > >>>>>> + ctx->rotation, > >>>>>> + ROTATION_0, ROTATION_90, ROTATION_180, > >>>>>> ROTATION_270); > >>>>>> + return AVERROR(EINVAL); > >>>>>> + } > >>>>>> + > >>>>>> + support_flag = pipeline_caps.rotation_flags & > >>>>>> + (1 << vpp_ctx->rotation_state); > >>>>>> + if (!support_flag) { > >>>>>> + av_log(avctx, AV_LOG_ERROR, "VAAPI driver doesn't > >>>>>> + support > >>>> %d\n", > >>>>>> + ctx->rotation); > >>>>>> + return AVERROR(EINVAL); > >>>>>> + } > >>>>>> + > >>>>>> + return 0; > >>>>>> +} > >>>>>> + > >>>>>> +static int rotation_vaapi_filter_frame(AVFilterLink *inlink, > >>>>>> +AVFrame > >>>>>> +*input_frame) { > >>>>>> + AVFilterContext *avctx = inlink->dst; > >>>>>> + AVFilterLink *outlink = avctx->outputs[0]; > >>>>>> + VAAPIVPPContext *vpp_ctx = avctx->priv; > >>>>>> + AVFrame *output_frame = NULL; > >>>>>> + VASurfaceID input_surface, output_surface; > >>>>>> + VARectangle input_region; > >>>>>> + > >>>>>> + VAProcPipelineParameterBuffer params; > >>>>>> + int err; > >>>>>> + > >>>>>> + av_log(avctx, AV_LOG_DEBUG, "Filter input: %s, %ux%u > >>>> (%"PRId64").\n", > >>>>>> + av_get_pix_fmt_name(input_frame->format), > >>>>>> + input_frame->width, input_frame->height, > >>>>>> + input_frame->pts); > >>>>>> + > >>>>>> + if (vpp_ctx->va_context == VA_INVALID_ID) > >>>>>> + return AVERROR(EINVAL); > >>>>>> + > >>>>>> + input_surface = (VASurfaceID)(uintptr_t)input_frame->data[3]; > >>>>>> + av_log(avctx, AV_LOG_DEBUG, "Using surface %#x for misc vpp > >>>> input.\n", > >>>>>> + input_surface); > >>>>>> + > >>>>>> + output_frame = ff_get_video_buffer(outlink, > >>>>>> vpp_ctx->output_width, > >>>>>> + vpp_ctx->output_height); > >>>>>> + if (!output_frame) { > >>>>>> + err = AVERROR(ENOMEM); > >>>>>> + goto fail; > >>>>>> + } > >>>>>> + > >>>>>> + output_surface = > >>>>>> (VASurfaceID)(uintptr_t)output_frame->data[3]; > >>>>>> + av_log(avctx, AV_LOG_DEBUG, "Using surface %#x for misc vpp > >>>>> output.\n", > >>>>>> + output_surface); > >>>>>> + memset(¶ms, 0, sizeof(params)); > >>>>>> + input_region = (VARectangle) { > >>>>>> + .x = 0, > >>>>>> + .y = 0, > >>>>>> + .width = input_frame->width, > >>>>>> + .height = input_frame->height, > >>>>>> + }; > >>>>>> + > >>>>>> + switch (vpp_ctx->rotation_state) { > >>>>>> + case VA_ROTATION_NONE: > >>>>>> + case VA_ROTATION_90: > >>>>>> + case VA_ROTATION_180: > >>>>>> + case VA_ROTATION_270: > >>>>>> + params.rotation_state = vpp_ctx->rotation_state; > >>>>>> + break; > >>>>>> + default: > >>>>>> + av_log(avctx, AV_LOG_ERROR, "VAAPI doesn't support %d\n", > >>>>>> + vpp_ctx->rotation_state); > >>>>>> + goto fail; > >>>>>> + } > >>>>>> + > >>>>>> + if (vpp_ctx->nb_filter_buffers) { > >>>>>> + params.filters = &vpp_ctx->filter_buffers[0]; > >>>>>> + params.num_filters = vpp_ctx->nb_filter_buffers; > >>>>>> + } > >>>>>> + params.surface = input_surface; > >>>>>> + params.surface_region = &input_region; > >>>>>> + params.surface_color_standard = > >>>>>> + ff_vaapi_vpp_colour_standard(input_frame->colorspace); > >>>>>> + > >>>>>> + params.output_region = NULL; > >>>>>> + params.output_background_color = 0xff000000; > >>>>>> + params.output_color_standard = > >>>>>> + params.surface_color_standard; > >>>>>> + > >>>>>> + params.pipeline_flags = 0; > >>>>>> + params.filter_flags = VA_FRAME_PICTURE; > >>>>>> + > >>>>>> + err = ff_vaapi_vpp_render_picture(avctx, ¶ms, > >>>>>> output_surface); > >>>>>> + if (err < 0) > >>>>>> + goto fail; > >>>>>> + > >>>>>> + err = av_frame_copy_props(output_frame, input_frame); > >>>>>> + if (err < 0) > >>>>>> + goto fail; > >>>>>> + av_frame_free(&input_frame); > >>>>>> + > >>>>>> + av_log(avctx, AV_LOG_DEBUG, "Filter output: %s, %ux%u > >>>>> (%"PRId64").\n", > >>>>>> + av_get_pix_fmt_name(output_frame->format), > >>>>>> + output_frame->width, output_frame->height, > >>>>>> + output_frame->pts); > >>>>>> + > >>>>>> + return ff_filter_frame(outlink, output_frame); > >>>>>> + > >>>>>> +fail: > >>>>>> + av_frame_free(&input_frame); > >>>>>> + av_frame_free(&output_frame); > >>>>>> + return err; > >>>>>> +} > >>>>>> + > >>>>>> +static av_cold int rotation_vaapi_init(AVFilterContext *avctx) { > >>>>>> + VAAPIVPPContext *vpp_ctx = avctx->priv; > >>>>>> + > >>>>>> + ff_vaapi_vpp_ctx_init(avctx); > >>>>>> + vpp_ctx->pipeline_uninit = ff_vaapi_vpp_pipeline_uninit; > >>>>>> + vpp_ctx->build_filter_params = > >>>>>> rotation_vaapi_build_filter_params; > >>>>>> + vpp_ctx->output_format = AV_PIX_FMT_NONE; > >>>>>> + > >>>>>> + return 0; > >>>>>> +} > >>>>>> + > >>>>>> +#define ROFFSET(x) offsetof(RotationVAAPIContext, x) #define > >>>>>> +FLAGS (AV_OPT_FLAG_VIDEO_PARAM | > >>> AV_OPT_FLAG_FILTERING_PARAM) > >>>>>> +static > >>>>> const > >>>>>> +AVOption rotation_vaapi_options[] = { > >>>>>> + { "dir", "set roation direction", ROFFSET(rotation), > >>>> AV_OPT_TYPE_INT, > >>>>> { .i64 = ROTATION_MIN }, ROTATION_MIN, ROTATION_MAX, FLAGS, > "dir" > >>>>> }, > >>>>>> + { "clock_0", "rotate clockwise 0 degrees", 0, > >>>> AV_OPT_TYPE_CONST, > >>>>> { .i64 = ROTATION_0 }, .flags=FLAGS, .unit = "dir" }, > >>>>>> + { "clock_90", "rotate clockwise 90 degrees", 0, > >>>> AV_OPT_TYPE_CONST, > >>>>> { .i64 = ROTATION_90}, .flags=FLAGS, .unit = "dir" }, > >>>>>> + { "clock_180", "rotate clockwise 180 degrees", 0, > >>>> AV_OPT_TYPE_CONST, > >>>>> { .i64 = ROTATION_180 }, .flags=FLAGS, .unit = "dir" }, > >>>>>> + { "clock_270", "rotate clockwise 270 degrees", 0, > >>>> AV_OPT_TYPE_CONST, > >>>>> { .i64 = ROTATION_270 }, .flags=FLAGS, .unit = "dir" }, > >>>>>> + { NULL }, > >>>>>> +}; > >>>>>> + > >>>>>> +AVFILTER_DEFINE_CLASS(rotation_vaapi); > >>>>>> + > >>>>>> +static const AVFilterPad rotation_vaapi_inputs[] = { > >>>>>> + { > >>>>>> + .name = "default", > >>>>>> + .type = AVMEDIA_TYPE_VIDEO, > >>>>>> + .filter_frame = &rotation_vaapi_filter_frame, > >>>>>> + .config_props = &ff_vaapi_vpp_config_input, > >>>>>> + }, > >>>>>> + { NULL } > >>>>>> +}; > >>>>>> + > >>>>>> +static const AVFilterPad rotation_vaapi_outputs[] = { > >>>>>> + { > >>>>>> + .name = "default", > >>>>>> + .type = AVMEDIA_TYPE_VIDEO, > >>>>>> + .config_props = &ff_vaapi_vpp_config_output, > >>>>>> + }, > >>>>>> + { NULL } > >>>>>> +}; > >>>>>> + > >>>>>> +AVFilter ff_vf_rotation_vaapi = { > >>>>>> + .name = "rotation_vaapi", > >>>>>> + .description = NULL_IF_CONFIG_SMALL("VAAPI VPP for > >>>>>> rotation"), > >>>>>> + .priv_size = sizeof(RotationVAAPIContext), > >>>>>> + .init = &rotation_vaapi_init, > >>>>>> + .uninit = &ff_vaapi_vpp_ctx_uninit, > >>>>>> + .query_formats = &ff_vaapi_vpp_query_formats, > >>>>>> + .inputs = rotation_vaapi_inputs, > >>>>>> + .outputs = rotation_vaapi_outputs, > >>>>>> + .priv_class = &rotation_vaapi_class, > >>>>>> + .flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE, }; > >>>>>> > >>>>> How about: > >>>>> > >>>>> deg=0 for 0 degree > >>>>> deg=90 for 90 degree > >>>>> deg=180 for 180 degree > >>>>> deg=270 for 270 degree > >>>>> > >>>>> ffmpeg -hwaccel vaapi -vaapi_device /dev/dri/renderD128 > >>>>> -hwaccel_output_format vaapi -i input.264 -vf > >>>>> "rotation_vaapi=deg=90" > >>>>> -c:v h264_vaapi output.h264 > >>>>> > >>>>> The rotation is in degrees , not direction. And using the actual > >>>>> degrees > >>>> instead > >>>>> of magic numbers makes it more obvious for the user. > >>>> > >>>> > >>>> My first version of the > >>>> patch(https://patchwork.ffmpeg.org/patch/10754/) > >>>> just like this. > >>>> > >>>> ffmpeg -hwaccel vaapi -vaapi_device /dev/dri/renderD128 > >>>> -hwaccel_output_format vaapi -i input.264 -vf > "rotation_vaapi=angle=90" > >>>> -c:v h264_vaapi output.h264 > >>>> > >>>> And I got comments to add sub-options. the sub-options are clock_0, > >>>> clock_90, clock_180, clock_270, the command line likes this. > >>>> > >>>> ffmpeg -hwaccel vaapi -vaapi_device /dev/dri/renderD128 > >>>> -hwaccel_output_format vaapi -i input.264 -vf "rotation_vaapi= > >>>> clock_270" > >>>> -c:v h264_vaapi output.h264 > >>>> > >>>> > >>>>> > >>>>> _______________________________________________ > >>>>> ffmpeg-devel mailing list > >>>>> ffmpeg-devel@ffmpeg.org > >>>>> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel > >>>> _______________________________________________ > >>>> ffmpeg-devel mailing list > >>>> ffmpeg-devel@ffmpeg.org > >>>> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel > >>> > >>> > >>> Please, call it transpose_vaapi, and make it accept the same options > >>> as the transpose filter we have. > >>> transpose != rotation. > >> > >> Actually, I want to change back to "rotation_vaapi=angle=90", I agree > >> "sean darcy <seandar...@gmail.com>" comments, and I think this filter > >> is different with transpose. > >> > >> 1. This filter no vflip/hflip support, but transpose has vflip/hflip, > >> in VAAPI another feature Mirroring, hflip/vflip are supported by > >> using VAProcPipelineParameterBuffer::mirror_state. I was planning > >> enable VAAPI mirroring in another patch. > >> 2. Currently VAAPI rotation only support 0/90/180/270 degrees, not > >> sure VAAPI will add more degrees in future, so I want to keep the > >> name rotation_vaapi to align VAAPI. > >> 3. I don't want to put VAAPI rotation and VAAPI mirroring together to > >> enable a similar but not same with transpose currently, Because the > >> same options and the different functions may call people confuse. > >> > >> My first version patch has already included the discussion regarding > >> the filter name and options. > >> https://patchwork.ffmpeg.org/patch/10754/ > >> > > > > Why we need yet another rotation filter that does not do rotation but > > does rotation in 4 fixed ways? > > Seriously? This needs some serious quality control. > > _______________________________________________ > > Not sure I understand this. I think Zachary is saying: > > Right now vaapi only does 0,90,180,270 rotations. It may do other rotations in > the future. It would be straightforward to then allow 45 > degrees: rotation_vaapi=angle=45 . If we use the transpose option set, that > would be much more awkward. > > Or am I missing your point ?
Thanks Sean, you got my point. > > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel