diff --git a/chromium-131-el8-libavcodec-parser.patch b/chromium-131-el8-libavcodec-parser.patch
new file mode 100644
index 00000000..c8242a78
--- /dev/null
+++ b/chromium-131-el8-libavcodec-parser.patch
@@ -0,0 +1,359 @@
+--- /dev/null	2024-11-22 07:51:33.845958571 +0100
++++ chromium-131.0.6778.85/third_party/ffmpeg/libavcodec/parser.h	2024-11-19 23:48:49.634320300 +0100
+@@ -0,0 +1,58 @@
++/*
++ * AVCodecParser prototypes and definitions
++ * Copyright (c) 2003 Fabrice Bellard
++ * Copyright (c) 2003 Michael Niedermayer
++ *
++ * 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
++ */
++
++#ifndef AVCODEC_PARSER_H
++#define AVCODEC_PARSER_H
++
++#include "avcodec.h"
++
++typedef struct ParseContext{
++    uint8_t *buffer;
++    int index;
++    int last_index;
++    unsigned int buffer_size;
++    uint32_t state;             ///< contains the last few bytes in MSB order
++    int frame_start_found;
++    int overread;               ///< the number of bytes which where irreversibly read from the next frame
++    int overread_index;         ///< the index into ParseContext.buffer of the overread bytes
++    uint64_t state64;           ///< contains the last 8 bytes in MSB order
++} ParseContext;
++
++#define END_NOT_FOUND (-100)
++
++/**
++ * Combine the (truncated) bitstream to a complete frame.
++ * @return -1 if no complete frame could be created,
++ *         AVERROR(ENOMEM) if there was a memory allocation error
++ */
++int ff_combine_frame(ParseContext *pc, int next, const uint8_t **buf, int *buf_size);
++void ff_parse_close(AVCodecParserContext *s);
++
++/**
++ * Fetch timestamps for a specific byte within the current access unit.
++ * @param off byte position within the access unit
++ * @param remove Found timestamps will be removed if set to 1, kept if set to 0.
++ * @param fuzzy Only use found value if it is more informative than what we already have
++ */
++void ff_fetch_timestamp(AVCodecParserContext *s, int off, int remove, int fuzzy);
++
++#endif /* AVCODEC_PARSER_H */
+--- /dev/null	2024-11-22 07:51:33.845958571 +0100
++++ chromium-131.0.6778.85/third_party/ffmpeg/libavcodec/parser.c	2024-11-19 23:48:49.633320000 +0100
+@@ -0,0 +1,295 @@
++/*
++ * Audio and Video frame extraction
++ * Copyright (c) 2003 Fabrice Bellard
++ * Copyright (c) 2003 Michael Niedermayer
++ *
++ * 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 <inttypes.h>
++#include <stdint.h>
++#include <string.h>
++
++#include "libavutil/avassert.h"
++#include "libavutil/mem.h"
++
++#include "parser.h"
++
++AVCodecParserContext *av_parser_init(int codec_id)
++{
++    AVCodecParserContext *s = NULL;
++    const AVCodecParser *parser;
++    void *i = 0;
++    int ret;
++
++    if (codec_id == AV_CODEC_ID_NONE)
++        return NULL;
++
++    while ((parser = av_parser_iterate(&i))) {
++        if (parser->codec_ids[0] == codec_id ||
++            parser->codec_ids[1] == codec_id ||
++            parser->codec_ids[2] == codec_id ||
++            parser->codec_ids[3] == codec_id ||
++            parser->codec_ids[4] == codec_id ||
++            parser->codec_ids[5] == codec_id ||
++            parser->codec_ids[6] == codec_id)
++            goto found;
++    }
++    return NULL;
++
++found:
++    s = av_mallocz(sizeof(AVCodecParserContext));
++    if (!s)
++        goto err_out;
++    s->parser = parser;
++    s->priv_data = av_mallocz(parser->priv_data_size);
++    if (!s->priv_data)
++        goto err_out;
++    s->fetch_timestamp=1;
++    s->pict_type = AV_PICTURE_TYPE_I;
++    if (parser->parser_init) {
++        ret = parser->parser_init(s);
++        if (ret != 0)
++            goto err_out;
++    }
++    s->key_frame            = -1;
++    s->dts_sync_point       = INT_MIN;
++    s->dts_ref_dts_delta    = INT_MIN;
++    s->pts_dts_delta        = INT_MIN;
++    s->format               = -1;
++
++    return s;
++
++err_out:
++    if (s)
++        av_freep(&s->priv_data);
++    av_free(s);
++    return NULL;
++}
++
++void ff_fetch_timestamp(AVCodecParserContext *s, int off, int remove, int fuzzy)
++{
++    int i;
++
++    if (!fuzzy) {
++        s->dts    =
++        s->pts    = AV_NOPTS_VALUE;
++        s->pos    = -1;
++        s->offset = 0;
++    }
++    for (i = 0; i < AV_PARSER_PTS_NB; i++) {
++        if (s->cur_offset + off >= s->cur_frame_offset[i] &&
++            (s->frame_offset < s->cur_frame_offset[i] ||
++             (!s->frame_offset && !s->next_frame_offset)) && // first field/frame
++            // check disabled since MPEG-TS does not send complete PES packets
++            /*s->next_frame_offset + off <*/  s->cur_frame_end[i]){
++
++            if (!fuzzy || s->cur_frame_dts[i] != AV_NOPTS_VALUE) {
++                s->dts    = s->cur_frame_dts[i];
++                s->pts    = s->cur_frame_pts[i];
++                s->pos    = s->cur_frame_pos[i];
++                s->offset = s->next_frame_offset - s->cur_frame_offset[i];
++            }
++            if (remove)
++                s->cur_frame_offset[i] = INT64_MAX;
++            if (s->cur_offset + off < s->cur_frame_end[i])
++                break;
++        }
++    }
++}
++
++int av_parser_parse2(AVCodecParserContext *s, AVCodecContext *avctx,
++                     uint8_t **poutbuf, int *poutbuf_size,
++                     const uint8_t *buf, int buf_size,
++                     int64_t pts, int64_t dts, int64_t pos)
++{
++    int index, i;
++    uint8_t dummy_buf[AV_INPUT_BUFFER_PADDING_SIZE];
++
++    av_assert1(avctx->codec_id != AV_CODEC_ID_NONE);
++
++    /* Parsers only work for the specified codec ids. */
++    av_assert1(avctx->codec_id == s->parser->codec_ids[0] ||
++               avctx->codec_id == s->parser->codec_ids[1] ||
++               avctx->codec_id == s->parser->codec_ids[2] ||
++               avctx->codec_id == s->parser->codec_ids[3] ||
++               avctx->codec_id == s->parser->codec_ids[4] ||
++               avctx->codec_id == s->parser->codec_ids[5] ||
++               avctx->codec_id == s->parser->codec_ids[6]);
++
++    if (!(s->flags & PARSER_FLAG_FETCHED_OFFSET)) {
++        s->next_frame_offset =
++        s->cur_offset        = pos;
++        s->flags            |= PARSER_FLAG_FETCHED_OFFSET;
++    }
++
++    if (buf_size == 0) {
++        /* padding is always necessary even if EOF, so we add it here */
++        memset(dummy_buf, 0, sizeof(dummy_buf));
++        buf = dummy_buf;
++    } else if (s->cur_offset + buf_size != s->cur_frame_end[s->cur_frame_start_index]) { /* skip remainder packets */
++        /* add a new packet descriptor */
++        i = (s->cur_frame_start_index + 1) & (AV_PARSER_PTS_NB - 1);
++        s->cur_frame_start_index = i;
++        s->cur_frame_offset[i]   = s->cur_offset;
++        s->cur_frame_end[i]      = s->cur_offset + buf_size;
++        s->cur_frame_pts[i]      = pts;
++        s->cur_frame_dts[i]      = dts;
++        s->cur_frame_pos[i]      = pos;
++    }
++
++    if (s->fetch_timestamp) {
++        s->fetch_timestamp = 0;
++        s->last_pts        = s->pts;
++        s->last_dts        = s->dts;
++        s->last_pos        = s->pos;
++        ff_fetch_timestamp(s, 0, 0, 0);
++    }
++    /* WARNING: the returned index can be negative */
++    index = s->parser->parser_parse(s, avctx, (const uint8_t **) poutbuf,
++                                    poutbuf_size, buf, buf_size);
++    av_assert0(index > -0x20000000); // The API does not allow returning AVERROR codes
++#define FILL(name) if(s->name > 0 && avctx->name <= 0) avctx->name = s->name
++    if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
++        FILL(field_order);
++        FILL(coded_width);
++        FILL(coded_height);
++        FILL(width);
++        FILL(height);
++    }
++
++    /* update the file pointer */
++    if (*poutbuf_size) {
++        /* fill the data for the current frame */
++        s->frame_offset = s->next_frame_offset;
++
++        /* offset of the next frame */
++        s->next_frame_offset = s->cur_offset + index;
++        s->fetch_timestamp   = 1;
++    } else {
++        /* Don't return a pointer to dummy_buf. */
++        *poutbuf = NULL;
++    }
++    if (index < 0)
++        index = 0;
++    s->cur_offset += index;
++    return index;
++}
++
++void av_parser_close(AVCodecParserContext *s)
++{
++    if (s) {
++        if (s->parser->parser_close)
++            s->parser->parser_close(s);
++        av_freep(&s->priv_data);
++        av_free(s);
++    }
++}
++
++int ff_combine_frame(ParseContext *pc, int next,
++                     const uint8_t **buf, int *buf_size)
++{
++    if (pc->overread) {
++        ff_dlog(NULL, "overread %d, state:%"PRIX32" next:%d index:%d o_index:%d\n",
++                pc->overread, pc->state, next, pc->index, pc->overread_index);
++        ff_dlog(NULL, "%X %X %X %X\n",
++                (*buf)[0], (*buf)[1], (*buf)[2], (*buf)[3]);
++    }
++
++    /* Copy overread bytes from last frame into buffer. */
++    for (; pc->overread > 0; pc->overread--)
++        pc->buffer[pc->index++] = pc->buffer[pc->overread_index++];
++
++    if (next > *buf_size)
++        return AVERROR(EINVAL);
++
++    /* flush remaining if EOF */
++    if (!*buf_size && next == END_NOT_FOUND)
++        next = 0;
++
++    pc->last_index = pc->index;
++
++    /* copy into buffer end return */
++    if (next == END_NOT_FOUND) {
++        void *new_buffer = av_fast_realloc(pc->buffer, &pc->buffer_size,
++                                           *buf_size + pc->index +
++                                           AV_INPUT_BUFFER_PADDING_SIZE);
++
++        if (!new_buffer) {
++            av_log(NULL, AV_LOG_ERROR, "Failed to reallocate parser buffer to %d\n", *buf_size + pc->index + AV_INPUT_BUFFER_PADDING_SIZE);
++            pc->index = 0;
++            return AVERROR(ENOMEM);
++        }
++        pc->buffer = new_buffer;
++        memcpy(&pc->buffer[pc->index], *buf, *buf_size);
++        memset(&pc->buffer[pc->index + *buf_size], 0, AV_INPUT_BUFFER_PADDING_SIZE);
++        pc->index += *buf_size;
++        return -1;
++    }
++
++    av_assert0(next >= 0 || pc->buffer);
++
++    *buf_size          =
++    pc->overread_index = pc->index + next;
++
++    /* append to buffer */
++    if (pc->index) {
++        void *new_buffer = av_fast_realloc(pc->buffer, &pc->buffer_size,
++                                           next + pc->index +
++                                           AV_INPUT_BUFFER_PADDING_SIZE);
++        if (!new_buffer) {
++            av_log(NULL, AV_LOG_ERROR, "Failed to reallocate parser buffer to %d\n", next + pc->index + AV_INPUT_BUFFER_PADDING_SIZE);
++            *buf_size =
++            pc->overread_index =
++            pc->index = 0;
++            return AVERROR(ENOMEM);
++        }
++        pc->buffer = new_buffer;
++        if (next > -AV_INPUT_BUFFER_PADDING_SIZE)
++            memcpy(&pc->buffer[pc->index], *buf,
++                   next + AV_INPUT_BUFFER_PADDING_SIZE);
++        pc->index = 0;
++        *buf      = pc->buffer;
++    }
++
++    if (next < -8) {
++        pc->overread += -8 - next;
++        next = -8;
++    }
++    /* store overread bytes */
++    for (; next < 0; next++) {
++        pc->state   = pc->state   << 8 | pc->buffer[pc->last_index + next];
++        pc->state64 = pc->state64 << 8 | pc->buffer[pc->last_index + next];
++        pc->overread++;
++    }
++
++    if (pc->overread) {
++        ff_dlog(NULL, "overread %d, state:%"PRIX32" next:%d index:%d o_index:%d\n",
++                pc->overread, pc->state, next, pc->index, pc->overread_index);
++        ff_dlog(NULL, "%X %X %X %X\n",
++                (*buf)[0], (*buf)[1], (*buf)[2], (*buf)[3]);
++    }
++
++    return 0;
++}
++
++void ff_parse_close(AVCodecParserContext *s)
++{
++    ParseContext *pc = s->priv_data;
++
++    av_freep(&pc->buffer);
++}
diff --git a/chromium.spec b/chromium.spec
index 4d54d170..1bc48554 100644
--- a/chromium.spec
+++ b/chromium.spec
@@ -329,6 +329,8 @@ Patch133: chromium-121-system-old-ffmpeg.patch
 patch134: chromium-125-disable-FFmpegAllowLists.patch
 # revert, it causes build error: use of undeclared identifier 'AVFMT_FLAG_NOH264PARSE'
 Patch135: chromium-129-disable-H.264-video-parser-during-demuxing.patch
+# workaround for build error on el8 (should be removed in next rebase)
+Patch136: chromium-131-el8-libavcodec-parser.patch
 
 # file conflict with old kernel on el8/el9
 Patch141: chromium-118-dma_buf_export_sync_file-conflict.patch
@@ -1041,6 +1043,10 @@ Qt6 UI for chromium.
 %patch -P135 -p1 -b .disable-H.264-video-parser-during-demuxing
 %endif
 
+%if 0%{?rhel} == 8
+%patch -P136 -p1 -b .el8-libavcodec-parser
+%endif
+
 %if 0%{?rhel} == 8 || 0%{?rhel} == 9
 %patch -P141 -p1 -b .dma_buf_export_sync_file-conflict
 %endif