| /* | |
| * OpenH264 video encoder | |
| * Copyright (C) 2014 Martin Storsjo | |
| * | |
| * 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 <wels/codec_api.h> | |
| #include <wels/codec_ver.h> | |
| #include "libavutil/attributes.h" | |
| #include "libavutil/common.h" | |
| #include "libavutil/opt.h" | |
| #include "libavutil/internal.h" | |
| #include "libavutil/intreadwrite.h" | |
| #include "libavutil/mathematics.h" | |
| #include "avcodec.h" | |
| #include "codec_internal.h" | |
| #include "encode.h" | |
| #include "internal.h" | |
| #include "libopenh264.h" | |
| #if !OPENH264_VER_AT_LEAST(1, 6) | |
| #define SM_SIZELIMITED_SLICE SM_DYN_SLICE | |
| #endif | |
| #define TARGET_BITRATE_DEFAULT 2*1000*1000 | |
| typedef struct SVCContext { | |
| const AVClass *av_class; | |
| ISVCEncoder *encoder; | |
| int slice_mode; | |
| int loopfilter; | |
| int profile; | |
| int max_nal_size; | |
| int skip_frames; | |
| int skipped; | |
| int coder; | |
| // rate control mode | |
| int rc_mode; | |
| } SVCContext; | |
| #define OFFSET(x) offsetof(SVCContext, x) | |
| #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM | |
| #define DEPRECATED AV_OPT_FLAG_DEPRECATED | |
| static const AVOption options[] = { | |
| { "loopfilter", "enable loop filter", OFFSET(loopfilter), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, VE }, | |
| { "profile", "set profile restrictions", OFFSET(profile), AV_OPT_TYPE_INT, { .i64 = AV_PROFILE_UNKNOWN }, AV_PROFILE_UNKNOWN, 0xffff, VE, .unit = "profile" }, | |
| #define PROFILE(name, value) name, NULL, 0, AV_OPT_TYPE_CONST, { .i64 = value }, 0, 0, VE, .unit = "profile" | |
| { PROFILE("constrained_baseline", AV_PROFILE_H264_CONSTRAINED_BASELINE) }, | |
| { PROFILE("main", AV_PROFILE_H264_MAIN) }, | |
| { PROFILE("high", AV_PROFILE_H264_HIGH) }, | |
| #undef PROFILE | |
| { "max_nal_size", "set maximum NAL size in bytes", OFFSET(max_nal_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, VE }, | |
| { "allow_skip_frames", "allow skipping frames to hit the target bitrate", OFFSET(skip_frames), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, | |
| { "coder", "Coder type", OFFSET(coder), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE, .unit = "coder" }, | |
| { "default", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = -1 }, INT_MIN, INT_MAX, VE, .unit = "coder" }, | |
| { "cavlc", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, INT_MIN, INT_MAX, VE, .unit = "coder" }, | |
| { "cabac", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, VE, .unit = "coder" }, | |
| { "vlc", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, INT_MIN, INT_MAX, VE, .unit = "coder" }, | |
| { "ac", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = 1 }, INT_MIN, INT_MAX, VE, .unit = "coder" }, | |
| { "rc_mode", "Select rate control mode", OFFSET(rc_mode), AV_OPT_TYPE_INT, { .i64 = RC_QUALITY_MODE }, RC_OFF_MODE, RC_TIMESTAMP_MODE, VE, .unit = "rc_mode" }, | |
| { "off", "bit rate control off", 0, AV_OPT_TYPE_CONST, { .i64 = RC_OFF_MODE }, 0, 0, VE, .unit = "rc_mode" }, | |
| { "quality", "quality mode", 0, AV_OPT_TYPE_CONST, { .i64 = RC_QUALITY_MODE }, 0, 0, VE, .unit = "rc_mode" }, | |
| { "bitrate", "bitrate mode", 0, AV_OPT_TYPE_CONST, { .i64 = RC_BITRATE_MODE }, 0, 0, VE, .unit = "rc_mode" }, | |
| { "buffer", "using buffer status to adjust the video quality (no bitrate control)", 0, AV_OPT_TYPE_CONST, { .i64 = RC_BUFFERBASED_MODE }, 0, 0, VE, .unit = "rc_mode" }, | |
| #if OPENH264_VER_AT_LEAST(1, 4) | |
| { "timestamp", "bit rate control based on timestamp", 0, AV_OPT_TYPE_CONST, { .i64 = RC_TIMESTAMP_MODE }, 0, 0, VE, .unit = "rc_mode" }, | |
| #endif | |
| { NULL } | |
| }; | |
| static const AVClass class = { | |
| .class_name = "libopenh264enc", | |
| .item_name = av_default_item_name, | |
| .option = options, | |
| .version = LIBAVUTIL_VERSION_INT, | |
| }; | |
| static av_cold int svc_encode_close(AVCodecContext *avctx) | |
| { | |
| SVCContext *s = avctx->priv_data; | |
| if (s->encoder) | |
| WelsDestroySVCEncoder(s->encoder); | |
| if (s->skipped > 0) | |
| av_log(avctx, AV_LOG_WARNING, "%d frames skipped\n", s->skipped); | |
| return 0; | |
| } | |
| static av_cold int svc_encode_init(AVCodecContext *avctx) | |
| { | |
| SVCContext *s = avctx->priv_data; | |
| SEncParamExt param = { 0 }; | |
| int log_level; | |
| WelsTraceCallback callback_function; | |
| AVCPBProperties *props; | |
| if (WelsCreateSVCEncoder(&s->encoder)) { | |
| av_log(avctx, AV_LOG_ERROR, "Unable to create encoder\n"); | |
| return AVERROR_UNKNOWN; | |
| } | |
| // Pass all libopenh264 messages to our callback, to allow ourselves to filter them. | |
| log_level = WELS_LOG_DETAIL; | |
| (*s->encoder)->SetOption(s->encoder, ENCODER_OPTION_TRACE_LEVEL, &log_level); | |
| // Set the logging callback function to one that uses av_log() (see implementation above). | |
| callback_function = (WelsTraceCallback) ff_libopenh264_trace_callback; | |
| (*s->encoder)->SetOption(s->encoder, ENCODER_OPTION_TRACE_CALLBACK, &callback_function); | |
| // Set the AVCodecContext as the libopenh264 callback context so that it can be passed to av_log(). | |
| (*s->encoder)->SetOption(s->encoder, ENCODER_OPTION_TRACE_CALLBACK_CONTEXT, &avctx); | |
| (*s->encoder)->GetDefaultParams(s->encoder, ¶m); | |
| if (avctx->framerate.num > 0 && avctx->framerate.den > 0) { | |
| param.fMaxFrameRate = av_q2d(avctx->framerate); | |
| } else { | |
| FF_DISABLE_DEPRECATION_WARNINGS | |
| param.fMaxFrameRate = 1.0 / av_q2d(avctx->time_base) | |
| #if FF_API_TICKS_PER_FRAME | |
| / FFMAX(avctx->ticks_per_frame, 1) | |
| #endif | |
| ; | |
| FF_ENABLE_DEPRECATION_WARNINGS | |
| } | |
| param.iPicWidth = avctx->width; | |
| param.iPicHeight = avctx->height; | |
| param.iTargetBitrate = avctx->bit_rate > 0 ? avctx->bit_rate : TARGET_BITRATE_DEFAULT; | |
| param.iMaxBitrate = FFMAX(avctx->rc_max_rate, avctx->bit_rate); | |
| param.iRCMode = s->rc_mode; | |
| if (avctx->qmax >= 0) | |
| param.iMaxQp = av_clip(avctx->qmax, 1, 51); | |
| if (avctx->qmin >= 0) | |
| param.iMinQp = av_clip(avctx->qmin, 1, param.iMaxQp); | |
| param.iTemporalLayerNum = 1; | |
| param.iSpatialLayerNum = 1; | |
| param.bEnableDenoise = 0; | |
| param.bEnableBackgroundDetection = 1; | |
| param.bEnableAdaptiveQuant = 1; | |
| param.bEnableFrameSkip = s->skip_frames; | |
| param.bEnableLongTermReference = 0; | |
| param.iLtrMarkPeriod = 30; | |
| if (avctx->gop_size >= 0) | |
| param.uiIntraPeriod = avctx->gop_size; | |
| #if OPENH264_VER_AT_LEAST(1, 4) | |
| param.eSpsPpsIdStrategy = CONSTANT_ID; | |
| #else | |
| param.bEnableSpsPpsIdAddition = 0; | |
| #endif | |
| param.bPrefixNalAddingCtrl = 0; | |
| param.iLoopFilterDisableIdc = !s->loopfilter; | |
| param.iEntropyCodingModeFlag = s->coder >= 0 ? s->coder : 1; | |
| param.iMultipleThreadIdc = avctx->thread_count; | |
| /* Allow specifying the libopenh264 profile through AVCodecContext. */ | |
| if (AV_PROFILE_UNKNOWN == s->profile && | |
| AV_PROFILE_UNKNOWN != avctx->profile) | |
| switch (avctx->profile) { | |
| case AV_PROFILE_H264_HIGH: | |
| case AV_PROFILE_H264_MAIN: | |
| case AV_PROFILE_H264_CONSTRAINED_BASELINE: | |
| s->profile = avctx->profile; | |
| break; | |
| default: | |
| av_log(avctx, AV_LOG_WARNING, | |
| "Unsupported avctx->profile: %d.\n", avctx->profile); | |
| break; | |
| } | |
| if (s->profile == AV_PROFILE_UNKNOWN && s->coder >= 0) | |
| s->profile = s->coder == 0 ? AV_PROFILE_H264_CONSTRAINED_BASELINE : | |
| #if OPENH264_VER_AT_LEAST(1, 8) | |
| AV_PROFILE_H264_HIGH; | |
| #else | |
| AV_PROFILE_H264_MAIN; | |
| #endif | |
| switch (s->profile) { | |
| case AV_PROFILE_H264_HIGH: | |
| av_log(avctx, AV_LOG_VERBOSE, "Using %s, " | |
| "select EProfileIdc PRO_HIGH in libopenh264.\n", | |
| param.iEntropyCodingModeFlag ? "CABAC" : "CAVLC"); | |
| break; | |
| case AV_PROFILE_H264_MAIN: | |
| av_log(avctx, AV_LOG_VERBOSE, "Using %s, " | |
| "select EProfileIdc PRO_MAIN in libopenh264.\n", | |
| param.iEntropyCodingModeFlag ? "CABAC" : "CAVLC"); | |
| break; | |
| case AV_PROFILE_H264_CONSTRAINED_BASELINE: | |
| case AV_PROFILE_UNKNOWN: | |
| s->profile = AV_PROFILE_H264_CONSTRAINED_BASELINE; | |
| param.iEntropyCodingModeFlag = 0; | |
| av_log(avctx, AV_LOG_VERBOSE, "Using CAVLC, " | |
| "select EProfileIdc PRO_BASELINE in libopenh264.\n"); | |
| break; | |
| default: | |
| s->profile = AV_PROFILE_H264_CONSTRAINED_BASELINE; | |
| param.iEntropyCodingModeFlag = 0; | |
| av_log(avctx, AV_LOG_WARNING, "Unsupported profile, " | |
| "select EProfileIdc PRO_BASELINE in libopenh264.\n"); | |
| break; | |
| } | |
| param.sSpatialLayers[0].iVideoWidth = param.iPicWidth; | |
| param.sSpatialLayers[0].iVideoHeight = param.iPicHeight; | |
| param.sSpatialLayers[0].fFrameRate = param.fMaxFrameRate; | |
| param.sSpatialLayers[0].iSpatialBitrate = param.iTargetBitrate; | |
| param.sSpatialLayers[0].iMaxSpatialBitrate = param.iMaxBitrate; | |
| param.sSpatialLayers[0].uiProfileIdc = s->profile; | |
| #if OPENH264_VER_AT_LEAST(1, 7) | |
| if (avctx->sample_aspect_ratio.num && avctx->sample_aspect_ratio.den) { | |
| // Table E-1. | |
| static const AVRational sar_idc[] = { | |
| { 0, 0 }, // Unspecified (never written here). | |
| { 1, 1 }, { 12, 11 }, { 10, 11 }, { 16, 11 }, | |
| { 40, 33 }, { 24, 11 }, { 20, 11 }, { 32, 11 }, | |
| { 80, 33 }, { 18, 11 }, { 15, 11 }, { 64, 33 }, | |
| { 160, 99 }, // Last 3 are unknown to openh264: { 4, 3 }, { 3, 2 }, { 2, 1 }, | |
| }; | |
| static const ESampleAspectRatio asp_idc[] = { | |
| ASP_UNSPECIFIED, | |
| ASP_1x1, ASP_12x11, ASP_10x11, ASP_16x11, | |
| ASP_40x33, ASP_24x11, ASP_20x11, ASP_32x11, | |
| ASP_80x33, ASP_18x11, ASP_15x11, ASP_64x33, | |
| ASP_160x99, | |
| }; | |
| int num, den, i; | |
| av_reduce(&num, &den, avctx->sample_aspect_ratio.num, | |
| avctx->sample_aspect_ratio.den, 65535); | |
| for (i = 1; i < FF_ARRAY_ELEMS(sar_idc); i++) { | |
| if (num == sar_idc[i].num && | |
| den == sar_idc[i].den) | |
| break; | |
| } | |
| if (i == FF_ARRAY_ELEMS(sar_idc)) { | |
| param.sSpatialLayers[0].eAspectRatio = ASP_EXT_SAR; | |
| param.sSpatialLayers[0].sAspectRatioExtWidth = num; | |
| param.sSpatialLayers[0].sAspectRatioExtHeight = den; | |
| } else { | |
| param.sSpatialLayers[0].eAspectRatio = asp_idc[i]; | |
| } | |
| param.sSpatialLayers[0].bAspectRatioPresent = true; | |
| } else { | |
| param.sSpatialLayers[0].bAspectRatioPresent = false; | |
| } | |
| #endif | |
| if ((avctx->slices > 1) && (s->max_nal_size)) { | |
| av_log(avctx, AV_LOG_ERROR, | |
| "Invalid combination -slices %d and -max_nal_size %d.\n", | |
| avctx->slices, s->max_nal_size); | |
| return AVERROR(EINVAL); | |
| } | |
| if (avctx->slices > 1) | |
| s->slice_mode = SM_FIXEDSLCNUM_SLICE; | |
| if (s->max_nal_size) | |
| s->slice_mode = SM_SIZELIMITED_SLICE; | |
| #if OPENH264_VER_AT_LEAST(1, 6) | |
| param.sSpatialLayers[0].sSliceArgument.uiSliceMode = s->slice_mode; | |
| param.sSpatialLayers[0].sSliceArgument.uiSliceNum = avctx->slices; | |
| #else | |
| param.sSpatialLayers[0].sSliceCfg.uiSliceMode = s->slice_mode; | |
| param.sSpatialLayers[0].sSliceCfg.sSliceArgument.uiSliceNum = avctx->slices; | |
| #endif | |
| if (avctx->slices == 0 && s->slice_mode == SM_FIXEDSLCNUM_SLICE) | |
| av_log(avctx, AV_LOG_WARNING, "Slice count will be set automatically\n"); | |
| if (s->slice_mode == SM_SIZELIMITED_SLICE) { | |
| if (s->max_nal_size) { | |
| param.uiMaxNalSize = s->max_nal_size; | |
| #if OPENH264_VER_AT_LEAST(1, 6) | |
| param.sSpatialLayers[0].sSliceArgument.uiSliceSizeConstraint = s->max_nal_size; | |
| #else | |
| param.sSpatialLayers[0].sSliceCfg.sSliceArgument.uiSliceSizeConstraint = s->max_nal_size; | |
| #endif | |
| } else { | |
| av_log(avctx, AV_LOG_ERROR, "Invalid -max_nal_size, " | |
| "specify a valid max_nal_size to use -slice_mode dyn\n"); | |
| return AVERROR(EINVAL); | |
| } | |
| } | |
| #if OPENH264_VER_AT_LEAST(1, 6) | |
| param.sSpatialLayers[0].uiVideoFormat = VF_UNDEF; | |
| if (avctx->color_range != AVCOL_RANGE_UNSPECIFIED) { | |
| param.sSpatialLayers[0].bFullRange = (avctx->color_range == AVCOL_RANGE_JPEG); | |
| } else if (avctx->pix_fmt == AV_PIX_FMT_YUVJ420P) | |
| param.sSpatialLayers[0].bFullRange = 1; | |
| if (avctx->colorspace != AVCOL_SPC_UNSPECIFIED || | |
| avctx->color_primaries != AVCOL_PRI_UNSPECIFIED || | |
| avctx->color_trc != AVCOL_TRC_UNSPECIFIED) { | |
| param.sSpatialLayers[0].bColorDescriptionPresent = true; | |
| } | |
| if (avctx->colorspace != AVCOL_SPC_UNSPECIFIED) | |
| param.sSpatialLayers[0].uiColorMatrix = avctx->colorspace; | |
| if (avctx->color_primaries != AVCOL_PRI_UNSPECIFIED) | |
| param.sSpatialLayers[0].uiColorPrimaries = avctx->color_primaries; | |
| if (avctx->color_trc != AVCOL_TRC_UNSPECIFIED) | |
| param.sSpatialLayers[0].uiTransferCharacteristics = avctx->color_trc; | |
| param.sSpatialLayers[0].bVideoSignalTypePresent = | |
| (param.sSpatialLayers[0].bFullRange || param.sSpatialLayers[0].bColorDescriptionPresent); | |
| #endif | |
| if ((*s->encoder)->InitializeExt(s->encoder, ¶m) != cmResultSuccess) { | |
| av_log(avctx, AV_LOG_ERROR, "Initialize failed\n"); | |
| return AVERROR_UNKNOWN; | |
| } | |
| if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) { | |
| SFrameBSInfo fbi = { 0 }; | |
| int i, size = 0; | |
| (*s->encoder)->EncodeParameterSets(s->encoder, &fbi); | |
| for (i = 0; i < fbi.sLayerInfo[0].iNalCount; i++) | |
| size += fbi.sLayerInfo[0].pNalLengthInByte[i]; | |
| avctx->extradata = av_mallocz(size + AV_INPUT_BUFFER_PADDING_SIZE); | |
| if (!avctx->extradata) | |
| return AVERROR(ENOMEM); | |
| avctx->extradata_size = size; | |
| memcpy(avctx->extradata, fbi.sLayerInfo[0].pBsBuf, size); | |
| } | |
| props = ff_encode_add_cpb_side_data(avctx); | |
| if (!props) | |
| return AVERROR(ENOMEM); | |
| props->max_bitrate = param.iMaxBitrate; | |
| props->avg_bitrate = param.iTargetBitrate; | |
| return 0; | |
| } | |
| static int svc_encode_frame(AVCodecContext *avctx, AVPacket *avpkt, | |
| const AVFrame *frame, int *got_packet) | |
| { | |
| SVCContext *s = avctx->priv_data; | |
| SFrameBSInfo fbi = { 0 }; | |
| int i, ret; | |
| int encoded; | |
| SSourcePicture sp = { 0 }; | |
| int size = 0, layer, first_layer = 0; | |
| int layer_size[MAX_LAYER_NUM_OF_FRAME] = { 0 }; | |
| sp.iColorFormat = videoFormatI420; | |
| for (i = 0; i < 3; i++) { | |
| sp.iStride[i] = frame->linesize[i]; | |
| sp.pData[i] = frame->data[i]; | |
| } | |
| sp.iPicWidth = avctx->width; | |
| sp.iPicHeight = avctx->height; | |
| if (frame->pict_type == AV_PICTURE_TYPE_I) { | |
| (*s->encoder)->ForceIntraFrame(s->encoder, true); | |
| } | |
| encoded = (*s->encoder)->EncodeFrame(s->encoder, &sp, &fbi); | |
| if (encoded != cmResultSuccess) { | |
| av_log(avctx, AV_LOG_ERROR, "EncodeFrame failed\n"); | |
| return AVERROR_UNKNOWN; | |
| } | |
| if (fbi.eFrameType == videoFrameTypeSkip) { | |
| s->skipped++; | |
| av_log(avctx, AV_LOG_DEBUG, "frame skipped\n"); | |
| return 0; | |
| } | |
| first_layer = 0; | |
| // Normal frames are returned with one single layer, while IDR | |
| // frames have two layers, where the first layer contains the SPS/PPS. | |
| // If using global headers, don't include the SPS/PPS in the returned | |
| // packet - thus, only return one layer. | |
| if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) | |
| first_layer = fbi.iLayerNum - 1; | |
| for (layer = first_layer; layer < fbi.iLayerNum; layer++) { | |
| for (i = 0; i < fbi.sLayerInfo[layer].iNalCount; i++) | |
| layer_size[layer] += fbi.sLayerInfo[layer].pNalLengthInByte[i]; | |
| size += layer_size[layer]; | |
| } | |
| av_log(avctx, AV_LOG_DEBUG, "%d slices\n", fbi.sLayerInfo[fbi.iLayerNum - 1].iNalCount); | |
| if ((ret = ff_get_encode_buffer(avctx, avpkt, size, 0))) | |
| return ret; | |
| size = 0; | |
| for (layer = first_layer; layer < fbi.iLayerNum; layer++) { | |
| memcpy(avpkt->data + size, fbi.sLayerInfo[layer].pBsBuf, layer_size[layer]); | |
| size += layer_size[layer]; | |
| } | |
| avpkt->pts = frame->pts; | |
| if (fbi.eFrameType == videoFrameTypeIDR) | |
| avpkt->flags |= AV_PKT_FLAG_KEY; | |
| *got_packet = 1; | |
| return 0; | |
| } | |
| static const FFCodecDefault svc_enc_defaults[] = { | |
| { "b", "0" }, | |
| { "g", "-1" }, | |
| { "qmin", "-1" }, | |
| { "qmax", "-1" }, | |
| { NULL }, | |
| }; | |
| const FFCodec ff_libopenh264_encoder = { | |
| .p.name = "libopenh264", | |
| CODEC_LONG_NAME("OpenH264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"), | |
| .p.type = AVMEDIA_TYPE_VIDEO, | |
| .p.id = AV_CODEC_ID_H264, | |
| .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_OTHER_THREADS | | |
| AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE, | |
| .priv_data_size = sizeof(SVCContext), | |
| .init = svc_encode_init, | |
| FF_CODEC_ENCODE_CB(svc_encode_frame), | |
| .close = svc_encode_close, | |
| .caps_internal = FF_CODEC_CAP_INIT_CLEANUP | | |
| FF_CODEC_CAP_AUTO_THREADS, | |
| .p.pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, | |
| AV_PIX_FMT_YUVJ420P, | |
| AV_PIX_FMT_NONE }, | |
| .defaults = svc_enc_defaults, | |
| .p.priv_class = &class, | |
| .p.wrapper_name = "libopenh264", | |
| }; |